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  3. reporting battery to domoticZ

reporting battery to domoticZ

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  • fhenrycoF Offline
    fhenrycoF Offline
    fhenryco
    wrote on last edited by fhenryco
    #13

    using V_text and S_info is a workaround to avoid grouping

    1 Reply Last reply
    0
    • R Offline
      R Offline
      Rene046
      wrote on last edited by
      #14

      i would like to ask something to ,

      Now i have the battery level showing up in Domoticz what can i do to log the voltage in volts, should i add something inside the sketch or something in domoticz..

      fhenrycoF AWIA 2 Replies Last reply
      0
      • R Rene046

        i would like to ask something to ,

        Now i have the battery level showing up in Domoticz what can i do to log the voltage in volts, should i add something inside the sketch or something in domoticz..

        fhenrycoF Offline
        fhenrycoF Offline
        fhenryco
        wrote on last edited by
        #15

        @Rene046
        This is the instruction in your sketch which allows to see the battery level of devices in domoticZ
        sendBatteryLevel(batteryPcnt);
        But as you noticed , this is not reported in the logs. One possibility to see it in the Log is to as well send this batteryPcnt information with a send(msgbatt.set(batteryPcnt ,1);
        provided you have defined
        MyMessage msgbatt(CHILD_ID_BATT, V_TEXT);

        In other words you send the battery info as if it was the info of an additional sensor sending text type info
        which you also need to present in the presentation void with

        present(CHILD_ID_BATT, S_INFO);
        For instance if you already have two sensors in you sketch let's say temp and hum with ID =0 and 1 respectively you would give the battery level the next unused ID
        CHILD_ID_BATT=2
        There might be a simpler and more natural way but i don't know it .

        1 Reply Last reply
        0
        • R Rene046

          i would like to ask something to ,

          Now i have the battery level showing up in Domoticz what can i do to log the voltage in volts, should i add something inside the sketch or something in domoticz..

          AWIA Offline
          AWIA Offline
          AWI
          Hero Member
          wrote on last edited by
          #16

          @Rene046 The "royal" way to report battery level is to define it as S_MULTIMETER and use it to report voltage. Domoticz will take the voltage and can graph it. i.e.

          definitions: MyMessage voltageMsg(VOLTAGE_CHILD_ID, V_VOLTAGE);
          in presentation: present(VOLTAGE_CHILD_ID, S_MULTIMETER, "Battery level" );
          sending: send(voltageMsg.set(lastVoltage,2)); //send battery in Volt 2 decimal places

          1 Reply Last reply
          1
          • R Offline
            R Offline
            Rene046
            wrote on last edited by
            #17

            @ fhenryco

            Cant get it to work, if you have time could help with my sketch.

            // Enable debug prints to serial monitor
            #define MY_DEBUG 
            
            // Enable and select radio type attached
            #define MY_RADIO_NRF24
            //#define MY_RADIO_RFM69
            
            
            #include <SPI.h>
            #include <MySensors.h>
            #include <DHT.h>   
            
            
            
            // Enable debug prints
            #define MY_DEBUG
            
            #define CHILD_ID_HUM 0
            #define CHILD_ID_TEMP 1
            #define HUMIDITY_SENSOR_DIGITAL_PIN 3
            #define CHILD_ID_BATTERY 4
            unsigned long SLEEP_TIME = 60000; // Sleep time between reads (in milliseconds)
            
            #define SKETCH_NAME "Temp_Hum_Batt"        // Change to a fancy name you like
            #define SKETCH_VERSION "2.1"                    // Your version
            
            DHT dht;
            float lastTemp;
            float lastHum;
            boolean metric = true; 
            MyMessage msgHum(CHILD_ID_HUM, V_HUM);
            MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
            MyMessage msgbatt(CHILD_ID_BATTERY, V_VOLTAGE);
            //MyMessage msgbatt(CHILD_ID_BATTERY, V_TEXT);
            
            //=========================
            // BATTERY VOLTAGE DIVIDER SETUP
            // 1M, 470K divider across battery and using internal ADC ref of 1.1V
            // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
            // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
            // 3.44/1023 = Volts per bit = 0.003363075
            #define VBAT_PER_BITS 0.0041055718475073313782991202346  
            #define VMIN 3.6                                  //  Vmin (radio Min Volt)=1.9V (564v)
            #define VMAX 4.2                                  //  Vmax = (2xAA bat)=3.0V (892v)
            int batteryPcnt = 0;                              // Calc value for battery %
            int batLoop = 0;                                  // Loop to help calc average
            int batArray[3];                                  // Array to store value for average calc.
            int BATTERY_SENSE_PIN = A0;                       // select the input pin for the battery sense point
            //=========================
            
            void setup()  
            { 
             analogReference(INTERNAL);             // For battery sensing
            
              delay(500); // Allow time for radio if power used as reset
              
              dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
            
              metric = getControllerConfig().isMetric;
            }
            
            void presentation()  
            { 
              // Send the Sketch Version Information to the Gateway
             // Send the Sketch Version Information to the Gateway
              sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);
            
              // Register all sensors to gw (they will be created as child devices)
              
              
              present(CHILD_ID_BATTERY, S_INFO);
              //present(CHILD_ID_BATTERY, S_CUSTOM);
              present(CHILD_ID_HUM, S_HUM);
              present(CHILD_ID_TEMP, S_TEMP);
            }
            
            void loop()      
            {  
              delay(500); // Allow time for radio if power used as reset
              delay(dht.getMinimumSamplingPeriod());
             
              // Fetch temperatures from DHT sensor
              float temperature = dht.getTemperature();
              if (isnan(temperature)) {
                  Serial.println("Failed reading temperature from DHT");
              } else if (temperature != lastTemp) {
                lastTemp = temperature;
                if (!metric) {
                  temperature = dht.toFahrenheit(temperature);
                }
                send(msgTemp.set(temperature, 1));
                Serial.print("T: ");
                Serial.println(temperature);
              }
              
              // Fetch humidity from DHT sensor
              float humidity = dht.getHumidity();
              if (isnan(humidity)) {
                  Serial.println("Failed reading humidity from DHT");
              } else if (humidity != lastHum) {
                  lastHum = humidity;
                  send(msgHum.set(humidity, 1));
                  Serial.print("H: ");
                  Serial.println(humidity);
              }
              batM();
              sleep(SLEEP_TIME); //sleep a bit
            }
            
            void batM() //The battery calculations
            {
               delay(500);
               // Battery monitoring reading
               int sensorValue = analogRead(BATTERY_SENSE_PIN);    
               delay(500);
               
               // Calculate the battery in %
               float Vbat  = sensorValue * VBAT_PER_BITS;
               int batteryPcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);
               Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");  
               
               // Add it to array so we get an average of 3 (3x20min)
               batArray[batLoop] = batteryPcnt;
              
               if (batLoop > 2) {  
                 batteryPcnt = (batArray[0] + batArray[1] + batArray[2] + batArray[3]);
                 batteryPcnt = batteryPcnt / 3;
             
               if (batteryPcnt > 100) {
                 batteryPcnt=100;
             }
             
                 Serial.print("Battery Average (Send): "); Serial.print(batteryPcnt); Serial.println(" %");
                   sendBatteryLevel(batteryPcnt);
                   msgbatt.set(batteryPcnt ,1);
                   batLoop = 0;
                  }
                 else 
                 {
                 batLoop++;
                 }
            }```
            
            My sketch is not working 100% my voltage is not precise, giving me even 221 in percentage while  lipo is at this moment 3.7 volt (simulated with a variable power supply)
            
            im running it on a nano on 1 lipo cell and a dc dc powerup to 5 volt measuring the lipo voltage with a  divider 1M/470K
            .
            Hope to add a soil moisture sensor and baro sensor in future.
            
            p.s. any one with some better idea sketch its ver welcome. im just started to experiment with Mysensor
            R fhenrycoF 2 Replies Last reply
            0
            • R Rene046

              @ fhenryco

              Cant get it to work, if you have time could help with my sketch.

              // Enable debug prints to serial monitor
              #define MY_DEBUG 
              
              // Enable and select radio type attached
              #define MY_RADIO_NRF24
              //#define MY_RADIO_RFM69
              
              
              #include <SPI.h>
              #include <MySensors.h>
              #include <DHT.h>   
              
              
              
              // Enable debug prints
              #define MY_DEBUG
              
              #define CHILD_ID_HUM 0
              #define CHILD_ID_TEMP 1
              #define HUMIDITY_SENSOR_DIGITAL_PIN 3
              #define CHILD_ID_BATTERY 4
              unsigned long SLEEP_TIME = 60000; // Sleep time between reads (in milliseconds)
              
              #define SKETCH_NAME "Temp_Hum_Batt"        // Change to a fancy name you like
              #define SKETCH_VERSION "2.1"                    // Your version
              
              DHT dht;
              float lastTemp;
              float lastHum;
              boolean metric = true; 
              MyMessage msgHum(CHILD_ID_HUM, V_HUM);
              MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
              MyMessage msgbatt(CHILD_ID_BATTERY, V_VOLTAGE);
              //MyMessage msgbatt(CHILD_ID_BATTERY, V_TEXT);
              
              //=========================
              // BATTERY VOLTAGE DIVIDER SETUP
              // 1M, 470K divider across battery and using internal ADC ref of 1.1V
              // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
              // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
              // 3.44/1023 = Volts per bit = 0.003363075
              #define VBAT_PER_BITS 0.0041055718475073313782991202346  
              #define VMIN 3.6                                  //  Vmin (radio Min Volt)=1.9V (564v)
              #define VMAX 4.2                                  //  Vmax = (2xAA bat)=3.0V (892v)
              int batteryPcnt = 0;                              // Calc value for battery %
              int batLoop = 0;                                  // Loop to help calc average
              int batArray[3];                                  // Array to store value for average calc.
              int BATTERY_SENSE_PIN = A0;                       // select the input pin for the battery sense point
              //=========================
              
              void setup()  
              { 
               analogReference(INTERNAL);             // For battery sensing
              
                delay(500); // Allow time for radio if power used as reset
                
                dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
              
                metric = getControllerConfig().isMetric;
              }
              
              void presentation()  
              { 
                // Send the Sketch Version Information to the Gateway
               // Send the Sketch Version Information to the Gateway
                sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);
              
                // Register all sensors to gw (they will be created as child devices)
                
                
                present(CHILD_ID_BATTERY, S_INFO);
                //present(CHILD_ID_BATTERY, S_CUSTOM);
                present(CHILD_ID_HUM, S_HUM);
                present(CHILD_ID_TEMP, S_TEMP);
              }
              
              void loop()      
              {  
                delay(500); // Allow time for radio if power used as reset
                delay(dht.getMinimumSamplingPeriod());
               
                // Fetch temperatures from DHT sensor
                float temperature = dht.getTemperature();
                if (isnan(temperature)) {
                    Serial.println("Failed reading temperature from DHT");
                } else if (temperature != lastTemp) {
                  lastTemp = temperature;
                  if (!metric) {
                    temperature = dht.toFahrenheit(temperature);
                  }
                  send(msgTemp.set(temperature, 1));
                  Serial.print("T: ");
                  Serial.println(temperature);
                }
                
                // Fetch humidity from DHT sensor
                float humidity = dht.getHumidity();
                if (isnan(humidity)) {
                    Serial.println("Failed reading humidity from DHT");
                } else if (humidity != lastHum) {
                    lastHum = humidity;
                    send(msgHum.set(humidity, 1));
                    Serial.print("H: ");
                    Serial.println(humidity);
                }
                batM();
                sleep(SLEEP_TIME); //sleep a bit
              }
              
              void batM() //The battery calculations
              {
                 delay(500);
                 // Battery monitoring reading
                 int sensorValue = analogRead(BATTERY_SENSE_PIN);    
                 delay(500);
                 
                 // Calculate the battery in %
                 float Vbat  = sensorValue * VBAT_PER_BITS;
                 int batteryPcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);
                 Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");  
                 
                 // Add it to array so we get an average of 3 (3x20min)
                 batArray[batLoop] = batteryPcnt;
                
                 if (batLoop > 2) {  
                   batteryPcnt = (batArray[0] + batArray[1] + batArray[2] + batArray[3]);
                   batteryPcnt = batteryPcnt / 3;
               
                 if (batteryPcnt > 100) {
                   batteryPcnt=100;
               }
               
                   Serial.print("Battery Average (Send): "); Serial.print(batteryPcnt); Serial.println(" %");
                     sendBatteryLevel(batteryPcnt);
                     msgbatt.set(batteryPcnt ,1);
                     batLoop = 0;
                    }
                   else 
                   {
                   batLoop++;
                   }
              }```
              
              My sketch is not working 100% my voltage is not precise, giving me even 221 in percentage while  lipo is at this moment 3.7 volt (simulated with a variable power supply)
              
              im running it on a nano on 1 lipo cell and a dc dc powerup to 5 volt measuring the lipo voltage with a  divider 1M/470K
              .
              Hope to add a soil moisture sensor and baro sensor in future.
              
              p.s. any one with some better idea sketch its ver welcome. im just started to experiment with Mysensor
              R Offline
              R Offline
              Rene046
              wrote on last edited by
              #18

              O i forget to tell im running the latest gateway from Mysensor.

              1 Reply Last reply
              0
              • R Rene046

                @ fhenryco

                Cant get it to work, if you have time could help with my sketch.

                // Enable debug prints to serial monitor
                #define MY_DEBUG 
                
                // Enable and select radio type attached
                #define MY_RADIO_NRF24
                //#define MY_RADIO_RFM69
                
                
                #include <SPI.h>
                #include <MySensors.h>
                #include <DHT.h>   
                
                
                
                // Enable debug prints
                #define MY_DEBUG
                
                #define CHILD_ID_HUM 0
                #define CHILD_ID_TEMP 1
                #define HUMIDITY_SENSOR_DIGITAL_PIN 3
                #define CHILD_ID_BATTERY 4
                unsigned long SLEEP_TIME = 60000; // Sleep time between reads (in milliseconds)
                
                #define SKETCH_NAME "Temp_Hum_Batt"        // Change to a fancy name you like
                #define SKETCH_VERSION "2.1"                    // Your version
                
                DHT dht;
                float lastTemp;
                float lastHum;
                boolean metric = true; 
                MyMessage msgHum(CHILD_ID_HUM, V_HUM);
                MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
                MyMessage msgbatt(CHILD_ID_BATTERY, V_VOLTAGE);
                //MyMessage msgbatt(CHILD_ID_BATTERY, V_TEXT);
                
                //=========================
                // BATTERY VOLTAGE DIVIDER SETUP
                // 1M, 470K divider across battery and using internal ADC ref of 1.1V
                // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
                // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
                // 3.44/1023 = Volts per bit = 0.003363075
                #define VBAT_PER_BITS 0.0041055718475073313782991202346  
                #define VMIN 3.6                                  //  Vmin (radio Min Volt)=1.9V (564v)
                #define VMAX 4.2                                  //  Vmax = (2xAA bat)=3.0V (892v)
                int batteryPcnt = 0;                              // Calc value for battery %
                int batLoop = 0;                                  // Loop to help calc average
                int batArray[3];                                  // Array to store value for average calc.
                int BATTERY_SENSE_PIN = A0;                       // select the input pin for the battery sense point
                //=========================
                
                void setup()  
                { 
                 analogReference(INTERNAL);             // For battery sensing
                
                  delay(500); // Allow time for radio if power used as reset
                  
                  dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
                
                  metric = getControllerConfig().isMetric;
                }
                
                void presentation()  
                { 
                  // Send the Sketch Version Information to the Gateway
                 // Send the Sketch Version Information to the Gateway
                  sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);
                
                  // Register all sensors to gw (they will be created as child devices)
                  
                  
                  present(CHILD_ID_BATTERY, S_INFO);
                  //present(CHILD_ID_BATTERY, S_CUSTOM);
                  present(CHILD_ID_HUM, S_HUM);
                  present(CHILD_ID_TEMP, S_TEMP);
                }
                
                void loop()      
                {  
                  delay(500); // Allow time for radio if power used as reset
                  delay(dht.getMinimumSamplingPeriod());
                 
                  // Fetch temperatures from DHT sensor
                  float temperature = dht.getTemperature();
                  if (isnan(temperature)) {
                      Serial.println("Failed reading temperature from DHT");
                  } else if (temperature != lastTemp) {
                    lastTemp = temperature;
                    if (!metric) {
                      temperature = dht.toFahrenheit(temperature);
                    }
                    send(msgTemp.set(temperature, 1));
                    Serial.print("T: ");
                    Serial.println(temperature);
                  }
                  
                  // Fetch humidity from DHT sensor
                  float humidity = dht.getHumidity();
                  if (isnan(humidity)) {
                      Serial.println("Failed reading humidity from DHT");
                  } else if (humidity != lastHum) {
                      lastHum = humidity;
                      send(msgHum.set(humidity, 1));
                      Serial.print("H: ");
                      Serial.println(humidity);
                  }
                  batM();
                  sleep(SLEEP_TIME); //sleep a bit
                }
                
                void batM() //The battery calculations
                {
                   delay(500);
                   // Battery monitoring reading
                   int sensorValue = analogRead(BATTERY_SENSE_PIN);    
                   delay(500);
                   
                   // Calculate the battery in %
                   float Vbat  = sensorValue * VBAT_PER_BITS;
                   int batteryPcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);
                   Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");  
                   
                   // Add it to array so we get an average of 3 (3x20min)
                   batArray[batLoop] = batteryPcnt;
                  
                   if (batLoop > 2) {  
                     batteryPcnt = (batArray[0] + batArray[1] + batArray[2] + batArray[3]);
                     batteryPcnt = batteryPcnt / 3;
                 
                   if (batteryPcnt > 100) {
                     batteryPcnt=100;
                 }
                 
                     Serial.print("Battery Average (Send): "); Serial.print(batteryPcnt); Serial.println(" %");
                       sendBatteryLevel(batteryPcnt);
                       msgbatt.set(batteryPcnt ,1);
                       batLoop = 0;
                      }
                     else 
                     {
                     batLoop++;
                     }
                }```
                
                My sketch is not working 100% my voltage is not precise, giving me even 221 in percentage while  lipo is at this moment 3.7 volt (simulated with a variable power supply)
                
                im running it on a nano on 1 lipo cell and a dc dc powerup to 5 volt measuring the lipo voltage with a  divider 1M/470K
                .
                Hope to add a soil moisture sensor and baro sensor in future.
                
                p.s. any one with some better idea sketch its ver welcome. im just started to experiment with Mysensor
                fhenrycoF Offline
                fhenrycoF Offline
                fhenryco
                wrote on last edited by
                #19

                @Rene046
                not
                msgbatt.set(batteryPcnt ,1);
                but
                send(msgbatt.set(batteryPcnt ,1));

                also may be better to use S_MULTIMETER and V_VOLTAGE (rather than S_INFO and V_TEXT) as adviced by AWI and also 2 decimals hence
                send(msgbatt.set(batteryPcnt ,2));

                1 Reply Last reply
                1
                • R Offline
                  R Offline
                  Rene046
                  wrote on last edited by
                  #20

                  thx i got a voltage log only giving me now -44.000 volt and 212 prct at battery level while measuring 3.7 volt battery and voltage on A0 1.3 volts
                  .

                  // Enable debug prints to serial monitor
                  #define MY_DEBUG 
                  
                  // Enable and select radio type attached
                  #define MY_RADIO_NRF24
                  //#define MY_RADIO_RFM69
                  
                  #include <SPI.h>
                  #include <MySensors.h>
                  #include <DHT.h>   
                  
                  // Enable debug prints
                  #define MY_DEBUG
                  
                  #define CHILD_ID_HUM 0
                  #define CHILD_ID_TEMP 1
                  #define HUMIDITY_SENSOR_DIGITAL_PIN 3
                  #define CHILD_ID_BATTERY 4
                  unsigned long SLEEP_TIME = 60000; // Sleep time between reads (in milliseconds)
                  
                  #define SKETCH_NAME "Temp_Hum_Batt"        // Change to a fancy name you like
                  #define SKETCH_VERSION "2.1"                    // Your version
                  
                  DHT dht;
                  float lastTemp;
                  float lastHum;
                  boolean metric = true; 
                  MyMessage msgHum(CHILD_ID_HUM, V_HUM);
                  MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
                  MyMessage msgbatt(CHILD_ID_BATTERY, V_VOLTAGE);
                  
                  //=========================
                  // BATTERY VOLTAGE DIVIDER SETUP
                  // 1M, 470K divider across battery and using internal ADC ref of 1.1V
                  // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
                  // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
                  // 3.44/1023 = Volts per bit = 0.003363075
                  #define VBAT_PER_BITS 0.0041055718475073313782991202346  // 4.20/1023 volt
                  #define VMIN 3.6                                  //  Vmin = 3.6 lipo empty
                  #define VMAX 4.2                                  //  Vmax = 4.2 volt lipo full
                  int batteryPcnt = 0;                              // Calc value for battery %
                  int batLoop = 0;                                  // Loop to help calc average
                  int batArray[3];                                  // Array to store value for average calc.
                  int BATTERY_SENSE_PIN = A0;                       // select the input pin for the battery sense point
                  //=========================
                  
                  void setup()  
                  { 
                   analogReference(INTERNAL);             // For battery sensing
                  
                    delay(500); // Allow time for radio if power used as reset
                    
                    dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
                  
                    metric = getControllerConfig().isMetric;
                  }
                  
                  void presentation()  
                  { 
                    // Send the Sketch Version Information to the Gateway
                   // Send the Sketch Version Information to the Gateway
                    sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);
                  
                    // Register all sensors to gw (they will be created as child devices)
                    
                    
                    present(CHILD_ID_BATTERY, S_MULTIMETER);
                    present(CHILD_ID_HUM, S_HUM);
                    present(CHILD_ID_TEMP, S_TEMP);
                  }
                  
                  void loop()      
                  {  
                    delay(500); // Allow time for radio if power used as reset
                    delay(dht.getMinimumSamplingPeriod());
                   
                    // Fetch temperatures from DHT sensor
                    float temperature = dht.getTemperature();
                    if (isnan(temperature)) {
                        Serial.println("Failed reading temperature from DHT");
                    } else if (temperature != lastTemp) {
                      lastTemp = temperature;
                      if (!metric) {
                        temperature = dht.toFahrenheit(temperature);
                      }
                      send(msgTemp.set(temperature, 1));
                      Serial.print("T: ");
                      Serial.println(temperature);
                    }
                    
                    // Fetch humidity from DHT sensor
                    float humidity = dht.getHumidity();
                    if (isnan(humidity)) {
                        Serial.println("Failed reading humidity from DHT");
                    } else if (humidity != lastHum) {
                        lastHum = humidity;
                        send(msgHum.set(humidity, 1));
                        Serial.print("H: ");
                        Serial.println(humidity);
                    }
                    batM();
                    sleep(SLEEP_TIME); //sleep a bit
                  }
                  
                  void batM() //The battery calculations
                  {
                     delay(500);
                     // Battery monitoring reading
                     int sensorValue = analogRead(BATTERY_SENSE_PIN);    
                     delay(500);
                     
                     // Calculate the battery in %
                     float Vbat  = sensorValue * VBAT_PER_BITS;
                     int batteryPcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);
                     Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");  
                     
                     // Add it to array so we get an average of 3 (3x20min)
                     batArray[batLoop] = batteryPcnt;
                    
                     if (batLoop > 2) {  
                       batteryPcnt = (batArray[0] + batArray[1] + batArray[2] + batArray[3]);
                       batteryPcnt = batteryPcnt / 3;
                   
                     if (batteryPcnt > 100) {
                       batteryPcnt=100;
                   }
                   
                       Serial.print("Battery Average (Send): "); Serial.print(batteryPcnt); Serial.println(" %");
                         sendBatteryLevel(batteryPcnt);
                         send(msgbatt.set(batteryPcnt ,2));
                         batLoop = 0;
                        }
                       else 
                       {
                       batLoop++;
                       }
                  }```
                  R AWIA Arnold ŠlepetisA 3 Replies Last reply
                  0
                  • R Rene046

                    thx i got a voltage log only giving me now -44.000 volt and 212 prct at battery level while measuring 3.7 volt battery and voltage on A0 1.3 volts
                    .

                    // Enable debug prints to serial monitor
                    #define MY_DEBUG 
                    
                    // Enable and select radio type attached
                    #define MY_RADIO_NRF24
                    //#define MY_RADIO_RFM69
                    
                    #include <SPI.h>
                    #include <MySensors.h>
                    #include <DHT.h>   
                    
                    // Enable debug prints
                    #define MY_DEBUG
                    
                    #define CHILD_ID_HUM 0
                    #define CHILD_ID_TEMP 1
                    #define HUMIDITY_SENSOR_DIGITAL_PIN 3
                    #define CHILD_ID_BATTERY 4
                    unsigned long SLEEP_TIME = 60000; // Sleep time between reads (in milliseconds)
                    
                    #define SKETCH_NAME "Temp_Hum_Batt"        // Change to a fancy name you like
                    #define SKETCH_VERSION "2.1"                    // Your version
                    
                    DHT dht;
                    float lastTemp;
                    float lastHum;
                    boolean metric = true; 
                    MyMessage msgHum(CHILD_ID_HUM, V_HUM);
                    MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
                    MyMessage msgbatt(CHILD_ID_BATTERY, V_VOLTAGE);
                    
                    //=========================
                    // BATTERY VOLTAGE DIVIDER SETUP
                    // 1M, 470K divider across battery and using internal ADC ref of 1.1V
                    // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
                    // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
                    // 3.44/1023 = Volts per bit = 0.003363075
                    #define VBAT_PER_BITS 0.0041055718475073313782991202346  // 4.20/1023 volt
                    #define VMIN 3.6                                  //  Vmin = 3.6 lipo empty
                    #define VMAX 4.2                                  //  Vmax = 4.2 volt lipo full
                    int batteryPcnt = 0;                              // Calc value for battery %
                    int batLoop = 0;                                  // Loop to help calc average
                    int batArray[3];                                  // Array to store value for average calc.
                    int BATTERY_SENSE_PIN = A0;                       // select the input pin for the battery sense point
                    //=========================
                    
                    void setup()  
                    { 
                     analogReference(INTERNAL);             // For battery sensing
                    
                      delay(500); // Allow time for radio if power used as reset
                      
                      dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
                    
                      metric = getControllerConfig().isMetric;
                    }
                    
                    void presentation()  
                    { 
                      // Send the Sketch Version Information to the Gateway
                     // Send the Sketch Version Information to the Gateway
                      sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);
                    
                      // Register all sensors to gw (they will be created as child devices)
                      
                      
                      present(CHILD_ID_BATTERY, S_MULTIMETER);
                      present(CHILD_ID_HUM, S_HUM);
                      present(CHILD_ID_TEMP, S_TEMP);
                    }
                    
                    void loop()      
                    {  
                      delay(500); // Allow time for radio if power used as reset
                      delay(dht.getMinimumSamplingPeriod());
                     
                      // Fetch temperatures from DHT sensor
                      float temperature = dht.getTemperature();
                      if (isnan(temperature)) {
                          Serial.println("Failed reading temperature from DHT");
                      } else if (temperature != lastTemp) {
                        lastTemp = temperature;
                        if (!metric) {
                          temperature = dht.toFahrenheit(temperature);
                        }
                        send(msgTemp.set(temperature, 1));
                        Serial.print("T: ");
                        Serial.println(temperature);
                      }
                      
                      // Fetch humidity from DHT sensor
                      float humidity = dht.getHumidity();
                      if (isnan(humidity)) {
                          Serial.println("Failed reading humidity from DHT");
                      } else if (humidity != lastHum) {
                          lastHum = humidity;
                          send(msgHum.set(humidity, 1));
                          Serial.print("H: ");
                          Serial.println(humidity);
                      }
                      batM();
                      sleep(SLEEP_TIME); //sleep a bit
                    }
                    
                    void batM() //The battery calculations
                    {
                       delay(500);
                       // Battery monitoring reading
                       int sensorValue = analogRead(BATTERY_SENSE_PIN);    
                       delay(500);
                       
                       // Calculate the battery in %
                       float Vbat  = sensorValue * VBAT_PER_BITS;
                       int batteryPcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);
                       Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");  
                       
                       // Add it to array so we get an average of 3 (3x20min)
                       batArray[batLoop] = batteryPcnt;
                      
                       if (batLoop > 2) {  
                         batteryPcnt = (batArray[0] + batArray[1] + batArray[2] + batArray[3]);
                         batteryPcnt = batteryPcnt / 3;
                     
                       if (batteryPcnt > 100) {
                         batteryPcnt=100;
                     }
                     
                         Serial.print("Battery Average (Send): "); Serial.print(batteryPcnt); Serial.println(" %");
                           sendBatteryLevel(batteryPcnt);
                           send(msgbatt.set(batteryPcnt ,2));
                           batLoop = 0;
                          }
                         else 
                         {
                         batLoop++;
                         }
                    }```
                    R Offline
                    R Offline
                    Rene046
                    wrote on last edited by
                    #21

                    And my serial monitor is going wild .lol
                    .

                    41815 MCO:SLP:WUP=-1
                    Battery percent: 95 %
                    Battery Average (Send): -12 %
                    45359 !TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=0,pt=1,l=1,sg=0,ft=0,st=NACK:244
                    45403 !TSF:MSG:SEND,2-2-0-0,s=4,c=1,t=38,pt=7,l=5,sg=0,ft=1,st=NACK:-12.00
                    45410 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                    45415 MCO:SLP:TPD
                    45417 MCO:SLP:WUP=-1
                    47962 !TSF:MSG:SEND,2-2-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=2,st=NACK:20.0
                    T: 20.00
                    48007 !TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=3,st=NACK:49.6
                    H: 49.60
                    Battery percent: -49 %
                    49014 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                    49020 MCO:SLP:TPD
                    49022 MCO:SLP:WUP=-1
                    51567 !TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=4,st=NACK:49.2
                    H: 49.20
                    Battery percent: -26 %
                    52575 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                    52582 MCO:SLP:TPD
                    
                    1 Reply Last reply
                    0
                    • R Offline
                      R Offline
                      Rene046
                      wrote on last edited by
                      #22

                      And it seems like instead of real voltage i seen percentage in the log

                      1 Reply Last reply
                      0
                      • R Rene046

                        thx i got a voltage log only giving me now -44.000 volt and 212 prct at battery level while measuring 3.7 volt battery and voltage on A0 1.3 volts
                        .

                        // Enable debug prints to serial monitor
                        #define MY_DEBUG 
                        
                        // Enable and select radio type attached
                        #define MY_RADIO_NRF24
                        //#define MY_RADIO_RFM69
                        
                        #include <SPI.h>
                        #include <MySensors.h>
                        #include <DHT.h>   
                        
                        // Enable debug prints
                        #define MY_DEBUG
                        
                        #define CHILD_ID_HUM 0
                        #define CHILD_ID_TEMP 1
                        #define HUMIDITY_SENSOR_DIGITAL_PIN 3
                        #define CHILD_ID_BATTERY 4
                        unsigned long SLEEP_TIME = 60000; // Sleep time between reads (in milliseconds)
                        
                        #define SKETCH_NAME "Temp_Hum_Batt"        // Change to a fancy name you like
                        #define SKETCH_VERSION "2.1"                    // Your version
                        
                        DHT dht;
                        float lastTemp;
                        float lastHum;
                        boolean metric = true; 
                        MyMessage msgHum(CHILD_ID_HUM, V_HUM);
                        MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
                        MyMessage msgbatt(CHILD_ID_BATTERY, V_VOLTAGE);
                        
                        //=========================
                        // BATTERY VOLTAGE DIVIDER SETUP
                        // 1M, 470K divider across battery and using internal ADC ref of 1.1V
                        // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
                        // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
                        // 3.44/1023 = Volts per bit = 0.003363075
                        #define VBAT_PER_BITS 0.0041055718475073313782991202346  // 4.20/1023 volt
                        #define VMIN 3.6                                  //  Vmin = 3.6 lipo empty
                        #define VMAX 4.2                                  //  Vmax = 4.2 volt lipo full
                        int batteryPcnt = 0;                              // Calc value for battery %
                        int batLoop = 0;                                  // Loop to help calc average
                        int batArray[3];                                  // Array to store value for average calc.
                        int BATTERY_SENSE_PIN = A0;                       // select the input pin for the battery sense point
                        //=========================
                        
                        void setup()  
                        { 
                         analogReference(INTERNAL);             // For battery sensing
                        
                          delay(500); // Allow time for radio if power used as reset
                          
                          dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
                        
                          metric = getControllerConfig().isMetric;
                        }
                        
                        void presentation()  
                        { 
                          // Send the Sketch Version Information to the Gateway
                         // Send the Sketch Version Information to the Gateway
                          sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);
                        
                          // Register all sensors to gw (they will be created as child devices)
                          
                          
                          present(CHILD_ID_BATTERY, S_MULTIMETER);
                          present(CHILD_ID_HUM, S_HUM);
                          present(CHILD_ID_TEMP, S_TEMP);
                        }
                        
                        void loop()      
                        {  
                          delay(500); // Allow time for radio if power used as reset
                          delay(dht.getMinimumSamplingPeriod());
                         
                          // Fetch temperatures from DHT sensor
                          float temperature = dht.getTemperature();
                          if (isnan(temperature)) {
                              Serial.println("Failed reading temperature from DHT");
                          } else if (temperature != lastTemp) {
                            lastTemp = temperature;
                            if (!metric) {
                              temperature = dht.toFahrenheit(temperature);
                            }
                            send(msgTemp.set(temperature, 1));
                            Serial.print("T: ");
                            Serial.println(temperature);
                          }
                          
                          // Fetch humidity from DHT sensor
                          float humidity = dht.getHumidity();
                          if (isnan(humidity)) {
                              Serial.println("Failed reading humidity from DHT");
                          } else if (humidity != lastHum) {
                              lastHum = humidity;
                              send(msgHum.set(humidity, 1));
                              Serial.print("H: ");
                              Serial.println(humidity);
                          }
                          batM();
                          sleep(SLEEP_TIME); //sleep a bit
                        }
                        
                        void batM() //The battery calculations
                        {
                           delay(500);
                           // Battery monitoring reading
                           int sensorValue = analogRead(BATTERY_SENSE_PIN);    
                           delay(500);
                           
                           // Calculate the battery in %
                           float Vbat  = sensorValue * VBAT_PER_BITS;
                           int batteryPcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);
                           Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");  
                           
                           // Add it to array so we get an average of 3 (3x20min)
                           batArray[batLoop] = batteryPcnt;
                          
                           if (batLoop > 2) {  
                             batteryPcnt = (batArray[0] + batArray[1] + batArray[2] + batArray[3]);
                             batteryPcnt = batteryPcnt / 3;
                         
                           if (batteryPcnt > 100) {
                             batteryPcnt=100;
                         }
                         
                             Serial.print("Battery Average (Send): "); Serial.print(batteryPcnt); Serial.println(" %");
                               sendBatteryLevel(batteryPcnt);
                               send(msgbatt.set(batteryPcnt ,2));
                               batLoop = 0;
                              }
                             else 
                             {
                             batLoop++;
                             }
                        }```
                        AWIA Offline
                        AWIA Offline
                        AWI
                        Hero Member
                        wrote on last edited by
                        #23

                        @Rene046 if you send V_VOLTAGE you should use the voltage level not the percentage.

                        R 1 Reply Last reply
                        0
                        • AWIA AWI

                          @Rene046 if you send V_VOLTAGE you should use the voltage level not the percentage.

                          R Offline
                          R Offline
                          Rene046
                          wrote on last edited by
                          #24

                          @AWI

                          hi could you explain how..

                          1 Reply Last reply
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                          • R Offline
                            R Offline
                            Rene046
                            wrote on last edited by
                            #25

                            I still cant get it to work, No voltage reading or logging.
                            I there nobody trying to build a equal sensor.

                            maybe someone who could rework my sketch. or having a working sketch where i could delete some sensors from.

                            kind regards and greetings from the Netherlands.

                            AWIA 1 Reply Last reply
                            0
                            • R Rene046

                              I still cant get it to work, No voltage reading or logging.
                              I there nobody trying to build a equal sensor.

                              maybe someone who could rework my sketch. or having a working sketch where i could delete some sensors from.

                              kind regards and greetings from the Netherlands.

                              AWIA Offline
                              AWIA Offline
                              AWI
                              Hero Member
                              wrote on last edited by
                              #26

                              @Rene046 I would be happy to help you but need some information on your circuit:

                              • How are you powering your Arduino? Through an (onboard) regulator or directly from battery?
                              • The internal reference can only be used up to 1.1V, you seem to be having a voltage divider which has a resulting voltage of > 1.1 V ?
                              • I do not understand your averaging algorithm, why are you not taking an average of the latest x readings?

                              My suggestion would be to use a different external reference (output of the dc-dc boost converter/ Vcc?) to measure the voltage.

                              1 Reply Last reply
                              0
                              • R Offline
                                R Offline
                                Rene046
                                wrote on last edited by
                                #27

                                Hi Awi

                                Thanks that you want to help,
                                Im powering it by a lipo battery 1 cell using an dc-dc boost converter to get 5 volts
                                i would like to see what this lipo is doing during a day. this lipo will be charged by an solar panel 6 volt 300ma still waiting for that panel.

                                You are absolutely right with my voltage divider it's at 1.9 volt while lipo is at 4.2 volt
                                I'm not a hero in elektronics , just starting to play with it. so to start i should make an voltage divider that gives me aprox 1,1 volt max at 4,2 volt.
                                I changed the voltages divider now from 270k-100k
                                giving me 1.07 volt at 4.2 volt lipo

                                i'm totally open for any other design you could give, i just used some code from others that was excepted by demoticz.

                                If you like you could send me an sample how you would do it or change my sketch ..
                                today i also received my BMP180 and BH1750 i want to include in the future..

                                1 Reply Last reply
                                0
                                • R Offline
                                  R Offline
                                  Rene046
                                  wrote on last edited by AWI
                                  #28

                                  my serial monitor is now making a bit more cense voltage is about 0,10 volt off
                                  but maybe i do something wrong with calculation.
                                  percentage is still something wrong with

                                  by the way i'm not shure with the low voltage of an 16850 lipo at 3.6 volt ...

                                  20412 MCO:SLP:WUP=-1
                                  22921 TSF:MSG:SEND,2-2-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:17.8
                                  T: 17.80
                                  22929 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=OK:35.4
                                  H: 35.40
                                  23939 TSF:MSG:SEND,2-2-0-0,s=4,c=1,t=38,pt=7,l=5,sg=0,ft=0,st=OK:3.53
                                  Battery voltage: 3.53 V
                                  Battery percent: -10 %
                                  23946 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                                  23954 MCO:SLP:TPD
                                  23955 MCO:SLP:WUP=-1
                                  26465 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=OK:36.1
                                  H: 36.10
                                  27473 TSF:MSG:SEND,2-2-0-0,s=4,c=1,t=38,pt=7,l=5,sg=0,ft=0,st=OK:3.52
                                  Battery voltage: 3.52 V
                                  Battery percent: -12 %
                                  27481 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                                  27489 MCO:SLP:TPD
                                  

                                  and here the latest sketch

                                  // Enable debug prints to serial monitor
                                  #define MY_DEBUG 
                                  
                                  // Enable and select radio type attached
                                  #define MY_RADIO_NRF24
                                  //#define MY_RADIO_RFM69
                                  
                                  #include <SPI.h>
                                  #include <MySensors.h>
                                  #include <DHT.h>   
                                  
                                  // Enable debug prints
                                  #define MY_DEBUG
                                  
                                  #define CHILD_ID_HUM 0
                                  #define CHILD_ID_TEMP 1
                                  #define HUMIDITY_SENSOR_DIGITAL_PIN 3
                                  #define CHILD_ID_BATTERY 4
                                  unsigned long SLEEP_TIME = 60000; // Sleep time between reads (in milliseconds)
                                  
                                  #define SKETCH_NAME "Temp_Hum_Batt"        // Change to a fancy name you like
                                  #define SKETCH_VERSION "2.1"                    // Your version
                                  
                                  DHT dht;
                                  float lastTemp;
                                  float lastHum;
                                  boolean metric = true; 
                                  MyMessage msgHum(CHILD_ID_HUM, V_HUM);
                                  MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
                                  MyMessage msgbatt(CHILD_ID_BATTERY, V_VOLTAGE);
                                  
                                  //=========================
                                  // BATTERY VOLTAGE DIVIDER SETUP
                                  // 1M, 470K divider across battery and using internal ADC ref of 1.1V
                                  // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
                                  // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
                                  // 3.44/1023 = Volts per bit = 0.003363075
                                  #define VBAT_PER_BITS 0.0041055718475073313782991202346  // 4.20/1023 volt
                                  #define VMIN 3.6                                  //  Vmin = 3.6 lipo empty
                                  #define VMAX 4.2                                  //  Vmax = 4.2 volt lipo full
                                  int batteryPcnt = 0;                              // Calc value for battery %
                                  int batLoop = 0;                                  // Loop to help calc average
                                  int batArray[3];                                  // Array to store value for average calc.
                                  int BATTERY_SENSE_PIN = A0;                       // select the input pin for the battery sense point
                                  //=========================
                                  
                                  void setup()  
                                  { 
                                   analogReference(INTERNAL);             // For battery sensing
                                  
                                    delay(500); // Allow time for radio if power used as reset
                                    
                                    dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
                                  
                                    metric = getControllerConfig().isMetric;
                                  }
                                  
                                  void presentation()  
                                  { 
                                    // Send the Sketch Version Information to the Gateway
                                   // Send the Sketch Version Information to the Gateway
                                    sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);
                                  
                                    // Register all sensors to gw (they will be created as child devices)
                                    
                                    
                                    present(CHILD_ID_BATTERY, S_MULTIMETER);
                                    present(CHILD_ID_HUM, S_HUM);
                                    present(CHILD_ID_TEMP, S_TEMP);
                                  }
                                  
                                  void loop()      
                                  {  
                                    delay(500); // Allow time for radio if power used as reset
                                    delay(dht.getMinimumSamplingPeriod());
                                   
                                    // Fetch temperatures from DHT sensor
                                    float temperature = dht.getTemperature();
                                    if (isnan(temperature)) {
                                        Serial.println("Failed reading temperature from DHT");
                                    } else if (temperature != lastTemp) {
                                      lastTemp = temperature;
                                      if (!metric) {
                                        temperature = dht.toFahrenheit(temperature);
                                      }
                                      send(msgTemp.set(temperature, 1));
                                      Serial.print("T: ");
                                      Serial.println(temperature);
                                    }
                                    
                                    // Fetch humidity from DHT sensor
                                    float humidity = dht.getHumidity();
                                    if (isnan(humidity)) {
                                        Serial.println("Failed reading humidity from DHT");
                                    } else if (humidity != lastHum) {
                                        lastHum = humidity;
                                        send(msgHum.set(humidity, 1));
                                        Serial.print("H: ");
                                        Serial.println(humidity);
                                    }
                                    batM();
                                    sleep(SLEEP_TIME); //sleep a bit
                                  }
                                  
                                  void batM() //The battery calculations
                                  {
                                     delay(500);
                                     // Battery monitoring reading
                                     int sensorValue = analogRead(BATTERY_SENSE_PIN);    
                                     delay(500);
                                     
                                     // Calculate the battery in %
                                     float Vbat  = sensorValue * VBAT_PER_BITS;
                                     send(msgbatt.set(Vbat ,2));
                                     Serial.print("Battery voltage: "); Serial.print(Vbat); Serial.println(" V");  
                                     int batteryPcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);
                                     Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");  
                                     
                                     // Add it to array so we get an average of 3 (3x20min)
                                     batArray[batLoop] = batteryPcnt;
                                    
                                     if (batLoop > 2) {  
                                       batteryPcnt = (batArray[0] + batArray[1] + batArray[2] + batArray[3]);
                                       batteryPcnt = batteryPcnt / 3;
                                   
                                     if (batteryPcnt > 100) {
                                       batteryPcnt=100;
                                   }
                                   
                                       Serial.print("Battery Average (Send): "); Serial.print(batteryPcnt); Serial.println(" %");
                                         sendBatteryLevel(batteryPcnt);
                                         
                                         batLoop = 0;
                                        }
                                       else 
                                       {
                                       batLoop++;
                                       }
                                  }
                                  
                                  R 1 Reply Last reply
                                  0
                                  • R Rene046

                                    my serial monitor is now making a bit more cense voltage is about 0,10 volt off
                                    but maybe i do something wrong with calculation.
                                    percentage is still something wrong with

                                    by the way i'm not shure with the low voltage of an 16850 lipo at 3.6 volt ...

                                    20412 MCO:SLP:WUP=-1
                                    22921 TSF:MSG:SEND,2-2-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:17.8
                                    T: 17.80
                                    22929 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=OK:35.4
                                    H: 35.40
                                    23939 TSF:MSG:SEND,2-2-0-0,s=4,c=1,t=38,pt=7,l=5,sg=0,ft=0,st=OK:3.53
                                    Battery voltage: 3.53 V
                                    Battery percent: -10 %
                                    23946 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                                    23954 MCO:SLP:TPD
                                    23955 MCO:SLP:WUP=-1
                                    26465 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=OK:36.1
                                    H: 36.10
                                    27473 TSF:MSG:SEND,2-2-0-0,s=4,c=1,t=38,pt=7,l=5,sg=0,ft=0,st=OK:3.52
                                    Battery voltage: 3.52 V
                                    Battery percent: -12 %
                                    27481 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                                    27489 MCO:SLP:TPD
                                    

                                    and here the latest sketch

                                    // Enable debug prints to serial monitor
                                    #define MY_DEBUG 
                                    
                                    // Enable and select radio type attached
                                    #define MY_RADIO_NRF24
                                    //#define MY_RADIO_RFM69
                                    
                                    #include <SPI.h>
                                    #include <MySensors.h>
                                    #include <DHT.h>   
                                    
                                    // Enable debug prints
                                    #define MY_DEBUG
                                    
                                    #define CHILD_ID_HUM 0
                                    #define CHILD_ID_TEMP 1
                                    #define HUMIDITY_SENSOR_DIGITAL_PIN 3
                                    #define CHILD_ID_BATTERY 4
                                    unsigned long SLEEP_TIME = 60000; // Sleep time between reads (in milliseconds)
                                    
                                    #define SKETCH_NAME "Temp_Hum_Batt"        // Change to a fancy name you like
                                    #define SKETCH_VERSION "2.1"                    // Your version
                                    
                                    DHT dht;
                                    float lastTemp;
                                    float lastHum;
                                    boolean metric = true; 
                                    MyMessage msgHum(CHILD_ID_HUM, V_HUM);
                                    MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
                                    MyMessage msgbatt(CHILD_ID_BATTERY, V_VOLTAGE);
                                    
                                    //=========================
                                    // BATTERY VOLTAGE DIVIDER SETUP
                                    // 1M, 470K divider across battery and using internal ADC ref of 1.1V
                                    // Sense point is bypassed with 0.1 uF cap to reduce noise at that point
                                    // ((1e6+470e3)/470e3)*1.1 = Vmax = 3.44 Volts
                                    // 3.44/1023 = Volts per bit = 0.003363075
                                    #define VBAT_PER_BITS 0.0041055718475073313782991202346  // 4.20/1023 volt
                                    #define VMIN 3.6                                  //  Vmin = 3.6 lipo empty
                                    #define VMAX 4.2                                  //  Vmax = 4.2 volt lipo full
                                    int batteryPcnt = 0;                              // Calc value for battery %
                                    int batLoop = 0;                                  // Loop to help calc average
                                    int batArray[3];                                  // Array to store value for average calc.
                                    int BATTERY_SENSE_PIN = A0;                       // select the input pin for the battery sense point
                                    //=========================
                                    
                                    void setup()  
                                    { 
                                     analogReference(INTERNAL);             // For battery sensing
                                    
                                      delay(500); // Allow time for radio if power used as reset
                                      
                                      dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
                                    
                                      metric = getControllerConfig().isMetric;
                                    }
                                    
                                    void presentation()  
                                    { 
                                      // Send the Sketch Version Information to the Gateway
                                     // Send the Sketch Version Information to the Gateway
                                      sendSketchInfo(SKETCH_NAME, SKETCH_VERSION);
                                    
                                      // Register all sensors to gw (they will be created as child devices)
                                      
                                      
                                      present(CHILD_ID_BATTERY, S_MULTIMETER);
                                      present(CHILD_ID_HUM, S_HUM);
                                      present(CHILD_ID_TEMP, S_TEMP);
                                    }
                                    
                                    void loop()      
                                    {  
                                      delay(500); // Allow time for radio if power used as reset
                                      delay(dht.getMinimumSamplingPeriod());
                                     
                                      // Fetch temperatures from DHT sensor
                                      float temperature = dht.getTemperature();
                                      if (isnan(temperature)) {
                                          Serial.println("Failed reading temperature from DHT");
                                      } else if (temperature != lastTemp) {
                                        lastTemp = temperature;
                                        if (!metric) {
                                          temperature = dht.toFahrenheit(temperature);
                                        }
                                        send(msgTemp.set(temperature, 1));
                                        Serial.print("T: ");
                                        Serial.println(temperature);
                                      }
                                      
                                      // Fetch humidity from DHT sensor
                                      float humidity = dht.getHumidity();
                                      if (isnan(humidity)) {
                                          Serial.println("Failed reading humidity from DHT");
                                      } else if (humidity != lastHum) {
                                          lastHum = humidity;
                                          send(msgHum.set(humidity, 1));
                                          Serial.print("H: ");
                                          Serial.println(humidity);
                                      }
                                      batM();
                                      sleep(SLEEP_TIME); //sleep a bit
                                    }
                                    
                                    void batM() //The battery calculations
                                    {
                                       delay(500);
                                       // Battery monitoring reading
                                       int sensorValue = analogRead(BATTERY_SENSE_PIN);    
                                       delay(500);
                                       
                                       // Calculate the battery in %
                                       float Vbat  = sensorValue * VBAT_PER_BITS;
                                       send(msgbatt.set(Vbat ,2));
                                       Serial.print("Battery voltage: "); Serial.print(Vbat); Serial.println(" V");  
                                       int batteryPcnt = static_cast<int>(((Vbat-VMIN)/(VMAX-VMIN))*100.);
                                       Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");  
                                       
                                       // Add it to array so we get an average of 3 (3x20min)
                                       batArray[batLoop] = batteryPcnt;
                                      
                                       if (batLoop > 2) {  
                                         batteryPcnt = (batArray[0] + batArray[1] + batArray[2] + batArray[3]);
                                         batteryPcnt = batteryPcnt / 3;
                                     
                                       if (batteryPcnt > 100) {
                                         batteryPcnt=100;
                                     }
                                     
                                         Serial.print("Battery Average (Send): "); Serial.print(batteryPcnt); Serial.println(" %");
                                           sendBatteryLevel(batteryPcnt);
                                           
                                           batLoop = 0;
                                          }
                                         else 
                                         {
                                         batLoop++;
                                         }
                                    }
                                    
                                    R Offline
                                    R Offline
                                    Rene046
                                    wrote on last edited by AWI
                                    #29

                                    @Rene046 said in reporting battery to domoticZ:

                                    my serial monitor is now making a bit more cense voltage is about 0,10 volt off
                                    but maybe i do something wrong with calculation.
                                    percentage is still something wrong with

                                    im feeding with 3.60 volts at that moment.

                                    AWIA 1 Reply Last reply
                                    0
                                    • R Rene046

                                      @Rene046 said in reporting battery to domoticZ:

                                      my serial monitor is now making a bit more cense voltage is about 0,10 volt off
                                      but maybe i do something wrong with calculation.
                                      percentage is still something wrong with

                                      im feeding with 3.60 volts at that moment.

                                      AWIA Offline
                                      AWIA Offline
                                      AWI
                                      Hero Member
                                      wrote on last edited by AWI
                                      #30

                                      @Rene046 The 1.1V internal reference is not calibrated and can be 10% off, So you need to do some calibration yourself.
                                      (b.t.w. I cleaned your postings a little. Please make sure you use the code markings in the right way, i.e. put them on a new line). To get you going I rewrote the battery routine. Changes:

                                      • no real need to average the readings if you give it time to stabilize.
                                      • got rid of the "volt per bit" constant
                                      • added a "reference value:" for calibration, you can calculate it from the measured voltage and reported voltage.
                                      // battery calculations
                                      void batM(){
                                      	const float vRef = 4.2/ 1.1 ;							// actual value for max reading, adjust with help of measured voltage
                                      	delay(500);
                                      	// Battery monitoring reading
                                      	int sensorValue = analogRead(BATTERY_SENSE_PIN);   		// sensorValue is 0..1023 where 1023 == vRef
                                      	float vBat = sensorValue * vRef / 1024 ;
                                      	send(msgbatt.set(vBat ,2));
                                      	Serial.print("Battery voltage: "); Serial.print(vBat); Serial.println(" V");  
                                      	// Calculate the battery in %
                                      	int batteryPcnt = static_cast<int>(((vBat-VMIN)/(VMAX-VMIN))*100.);
                                      	sendBatteryLevel( batteryPcnt) ;
                                      	Serial.print("Battery percent: "); Serial.print(batteryPcnt); Serial.println(" %");
                                      }
                                      
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                                      • R Offline
                                        R Offline
                                        Rene046
                                        wrote on last edited by
                                        #31

                                        Thanks that looks way better.
                                        I just changed
                                        const float vRef = 4.2/ 1.1 ;
                                        into
                                        const float vRef = 4.2/ 1.07 ;
                                        because this is what i measure with my multimeter with 4.2 volt battery and measuring my voltage divider i have 1.07 volt
                                        .
                                        Giving me strange results something must be bad ..... my multimeter ?? it should be closer to 4.2 ? i guess

                                        Battery voltage: 3.92 V
                                        14842 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=0,pt=1,l=1,sg=0,ft=0,st=OK:53
                                        Battery percent: 53 %
                                        14850 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                                        14856 MCO:SLP:TPD
                                        14858 MCO:SLP:WUP=-1
                                        17367 TSF:MSG:SEND,2-2-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:19.4
                                        T: 19.40
                                        17376 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=OK:48.5
                                        H: 48.50
                                        17885 TSF:MSG:SEND,2-2-0-0,s=4,c=1,t=38,pt=7,l=5,sg=0,ft=0,st=OK:3.92
                                        Battery voltage: 3.92 V
                                        17893 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=0,pt=1,l=1,sg=0,ft=0,st=OK:53
                                        Battery percent: 53 %
                                        17900 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                                        17906 MCO:SLP:TPD```
                                        AWIA 1 Reply Last reply
                                        0
                                        • R Rene046

                                          Thanks that looks way better.
                                          I just changed
                                          const float vRef = 4.2/ 1.1 ;
                                          into
                                          const float vRef = 4.2/ 1.07 ;
                                          because this is what i measure with my multimeter with 4.2 volt battery and measuring my voltage divider i have 1.07 volt
                                          .
                                          Giving me strange results something must be bad ..... my multimeter ?? it should be closer to 4.2 ? i guess

                                          Battery voltage: 3.92 V
                                          14842 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=0,pt=1,l=1,sg=0,ft=0,st=OK:53
                                          Battery percent: 53 %
                                          14850 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                                          14856 MCO:SLP:TPD
                                          14858 MCO:SLP:WUP=-1
                                          17367 TSF:MSG:SEND,2-2-0-0,s=1,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:19.4
                                          T: 19.40
                                          17376 TSF:MSG:SEND,2-2-0-0,s=0,c=1,t=1,pt=7,l=5,sg=0,ft=0,st=OK:48.5
                                          H: 48.50
                                          17885 TSF:MSG:SEND,2-2-0-0,s=4,c=1,t=38,pt=7,l=5,sg=0,ft=0,st=OK:3.92
                                          Battery voltage: 3.92 V
                                          17893 TSF:MSG:SEND,2-2-0-0,s=255,c=3,t=0,pt=1,l=1,sg=0,ft=0,st=OK:53
                                          Battery percent: 53 %
                                          17900 MCO:SLP:MS=60000,SMS=0,I1=255,M1=255,I2=255,M2=255
                                          17906 MCO:SLP:TPD```
                                          AWIA Offline
                                          AWIA Offline
                                          AWI
                                          Hero Member
                                          wrote on last edited by
                                          #32

                                          @Rene046 You should still compensate for the 1.1 offset. What you should do is calculate the vRef from the measured battery voltage and the real voltage.

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