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  3. 3 in 1 incl battery monitor

3 in 1 incl battery monitor

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  • the cosmic gateT the cosmic gate

    @sundberg84 said:

    Dont know if im answring the question (or i understand it)...
    Do you mean @AWI that if you put the gw.*** together?

    gw.begin();
      dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
     pinMode(DIGITAL_INPUT_SENSOR, INPUT);      // sets the motion sensor digital pin as input
     
      // Register all sensors to gw (they will be created as child devices)
      gw.present(CHILD_ID_HUM, S_HUM);
      gw.present(CHILD_ID_TEMP, S_TEMP);
      gw.present(CHILD_ID_MOT, S_MOTION);
    

    put all the gw. *** together it will not cause the radio be on during DHT setup and readings like:

    dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
     pinMode(DIGITAL_INPUT_SENSOR, INPUT);      // sets the motion sensor digital pin as input
    
    gw.begin(); 
      // Register all sensors to gw (they will be created as child devices)
      gw.present(CHILD_ID_HUM, S_HUM);
      gw.present(CHILD_ID_TEMP, S_TEMP);
      gw.present(CHILD_ID_MOT, S_MOTION);
    
    

    Now I'am getting confused :)

    The thing i want to do is to make this 3in1 sketch , an 4 in 1 where the 4th is the battery sensors.
    When i copy and paste this sketches together, i want to arrange one sketch who can run als long as possible on 2xAA batteries.
    So if there are some tricks to make this sketch more battery friendle, so it runs longer on this 2 AA then it try to arrange is.
    So As @AWI said i'll removed all the gw.send instructions, which gives me the result that the mysensors function is gone.
    Then i tried again and put all the gw.send instructions "together".
    But when i read you're reactien @sundberg84 this is not okay, or are there even more options to combine rules to make the sketch more battery friendly ?

    Thnx for all the input

    AWIA Offline
    AWIA Offline
    AWI
    Hero Member
    wrote on last edited by
    #10

    @the-cosmic-gate The reason to group all the "gw.send" instructions together (at the end of the sketch) is that the radio can "sleep" during the temperature and humidity readings. There are many ways (other than HW) to save battery power, like: only send values when a certain threshold is exceeded, decrease update frequency etc.

    Just an example for a sensor which uses 11 uA in idle and sends updates only when needed (including a once in a hour 'heartbeat' of all sensors).

    /*
     PROJECT: MySensors / Small battery sensor low power 1 mhz
     PROGRAMMER: AWI
     DATE: november 4, 2015/ last update: december 4, 2015
     FILE: AWI small THM.ino
     LICENSE: Public domain
    
     Hardware: ATMega328p board w/ NRF24l01
    	and MySensors 1.6 (Development)
    		
    Special:
    	program with Arduino Pro 3.3V 1Mhz!!!
    	
    Summary:
    	low power (battery)
    	HTU21 Temp/Hum & Motion (interrupt)
    	voltage meter for battery (internal)
    
    Remarks:
    	Fixed node-id
    	
    Change log:
    20151204 - made it universal with respect to node id, only change   first 2 lines
    */
    
    // Enable debug prints to serial monitor
    #define MY_NODE_ID 19
    #define NODE_TXT "THM 19"							// Text to add to sensor name
    
    #define MY_DEBUG 
    #define MY_RADIO_NRF24								// Enable and select radio type attached
    
    #include <SPI.h>
    #include <MySensor.h>
    #include <Wire.h> 									// I2C
    #include <HTU21D.h>            						// temperature / humidity (i2c, HTU21D, SHT21)
    #include <Vcc.h>									// library for internal reference Vcc reading
    
    #undef MY_DEBUG										// turns of MySensors Serial debug (default on)
    
    // Reference values for ADC and Battery measurements
    const float VccMin        	= 1.0*2.5 ;    			// Minimum expected Vcc level, in Volts. Example for 1 rechargeable lithium-ion.
    const float VccMax       	= 1.0*3.0 ;    			// Maximum expected Vcc level, in Volts. 
    //const float VccMin        = 2.0*0.6 ;  			// Minimum expected Vcc level, in Volts. for 2xAA Alkaline.
    //const float VccMax        = 2.0*1.5 ;  			// Maximum expected Vcc level, in Volts.for 2xAA Alkaline.
    const float VccCorrection 	= 3.30/3.42 ;			// Measured Vcc by multimeter divided by reported Vcc
    Vcc vcc(VccCorrection); 							// instantiate internal voltage measurement lib
    
    const float tempThreshold = 0.02 ; 					// send only if change > treshold (Celcius)
    const float humThreshold = 0.05 ; 					// send only if change > treshold (% RG)
    const float voltageThreshold = 0.01 ; 				// send only if change > treshold (Volt)
    
    #define MOTION_CHILD_ID 		1
    #define TEMP_CHILD_ID 			3
    #define HUM_CHILD_ID 			4
    #define VOLTAGE_CHILD_ID 		7
    
    #define DIGITAL_INPUT_SENSOR 	3  					// motion sensor.  (Only 2 and 3 generates interrupt!)
    #define INTERRUPT DIGITAL_INPUT_SENSOR-2 			// Usually the interrupt = pin -2 
    
    HTU21D SHT21;										// Hum/Temp (SHT12)
    
    const unsigned long SLEEP_TIME = 60000UL;			// 60 sec sleep time between reads (seconds * 1000 milliseconds)
    const int heartbeat = 60 ;							// heartbeat every hour (x times SLEEP_TIME)
    unsigned long lastHeartbeat = 0 ; 
    float lastHumidity = 0 ;
    float lastTemperature = 0 ;
    float lastVoltage = 0 ;
    boolean lastTripped = false ;
    // flags to indicate if transmission is needed, heartbeat and/or changes > treshold
    boolean txHumidity = true ;							// flags to indicate if transmit is needed (time & change driven)
    boolean txTemperature = true ;
    boolean txVoltage = true ;
    boolean txTripped = true ;
    
    // standard messages
    MyMessage temperatureMsg(TEMP_CHILD_ID, V_TEMP);	// SHT temp
    MyMessage humidityMsg(HUM_CHILD_ID, V_HUM);			// SHT hum
    MyMessage voltageMsg(VOLTAGE_CHILD_ID, V_VOLTAGE);	// Node voltage
    MyMessage motionMsg(MOTION_CHILD_ID, V_TRIPPED);	// Motion/ door contact
    
    void setup()  
    {
    	analogReference(INTERNAL);						// use the 1.1 V internal reference for voltage measurement
    	//begin(NULL, nodeId);  						// fixed node 
    	Serial.begin(9600);								// reset baud rate for 1 mhz clock rate
        // Send the sketch version information to the gateway and Controller
    	sendSketchInfo("AWI small " NODE_TXT, "1.0");
    	present(TEMP_CHILD_ID, S_TEMP, "Temperature SHT " NODE_TXT);
    	present(HUM_CHILD_ID, S_HUM, "Humidity SHT " NODE_TXT);
    	present(VOLTAGE_CHILD_ID, S_MULTIMETER, "Battery " NODE_TXT);
    	present(MOTION_CHILD_ID, S_MOTION, "Motion " NODE_TXT);
    
    	pinMode(DIGITAL_INPUT_SENSOR, INPUT);      		// sets the motion sensor digital pin as input
       
    	Wire.begin();									// init I2C
    	SHT21.begin();									// initialize temp/hum
    }
    
    void loop()
    {
    	// first read all sensors before possible transmission (save battery)
        readTempHum(); 
    	// Read digital motion value
    	boolean tripped = false ;//digitalRead(DIGITAL_INPUT_SENSOR) == HIGH;     
    	if (lastTripped != tripped){
    		lastTripped = tripped ;
    		txTripped = true ;
    		}
    	// read battery Voltage
        float voltage = vcc.Read_Volts() ;
    	if ( abs(voltage - lastVoltage) >= voltageThreshold ){ // update only if threshold exceeded
    		lastVoltage = voltage ;
    		txVoltage = true ;
    		} 
    	sendSensors() ;											// send sensors (== radio) at the end 
    	sleep(INTERRUPT, CHANGE , SLEEP_TIME );					// sleep and wait for time and motion
    }
    
    void readTempHum(void)
    {
        // SHT2x sensor
    	// Temperature and Humidity
    	float humidity = SHT21.readHumidity();
    	float temperature = SHT21.readTemperature();			// save battery by sending changes only & reading SHT first (>50ms)
    	if ( abs(humidity  - lastHumidity) >= humThreshold ){	// update only if threshold exceeded
    		lastHumidity = humidity ;
    		txHumidity = true ;
    		} 
    	if ( abs(temperature - lastTemperature) >= tempThreshold ){ 
    		lastTemperature = temperature ;
    		txTemperature = true ;
    		} 
    	// Serial.print("SHT_ temp: ");
    	// Serial.print(temperatureSHT);
    	// Serial.print(" SHT_ hum: ");
    	// Serial.println(humidity);
    }
    
    // send to gateway depending on tx.. settings
    void sendSensors()
    {
    	lastHeartbeat++ ;										// update Heartbeatcount every call
    	if ( lastHeartbeat > heartbeat) {						// if heartbeat update all sensors & battery status
    		txTemperature = txHumidity = txVoltage = true ;
    	    sendBatteryLevel(vcc.Read_Perc(VccMin, VccMax, true));
    		lastHeartbeat = 0 ;
    		}
    	if (txTemperature){
    		send(temperatureMsg.set(lastTemperature, 2));		// Send in deg C
    		txTemperature = false ;
    		}
    	if (txHumidity){
    		send(humidityMsg.set(lastHumidity, 2));  			// Send in %RH
    		txHumidity = false ;
    		}
    	if (txVoltage){
    		send(voltageMsg.set(lastVoltage,2));				//send battery in Volt 
    		txVoltage = false ;
    		}
    	if (txTripped){
    		send(motionMsg.set(lastTripped?"1":"0"));  			// Send tripped value to gw 
    		txTripped = false ;
    		}
    }
    
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    • the cosmic gateT Offline
      the cosmic gateT Offline
      the cosmic gate
      wrote on last edited by
      #11

      I'am not getting this clear / working :(
      Could somebody help me to complete this 3in1 incl battery monitoring sketch working? Thnx

      There's more than meets the eye

      AWIA 1 Reply Last reply
      0
      • sundberg84S Offline
        sundberg84S Offline
        sundberg84
        Hardware Contributor
        wrote on last edited by
        #12

        What does your serial or error log tell you when you upload the sketch you have? And which sketch/code do you use at this point?

        Controller: Proxmox VM - Home Assistant
        MySensors GW: Arduino Uno - W5100 Ethernet, Gw Shield Nrf24l01+ 2,4Ghz
        MySensors GW: Arduino Uno - Gw Shield RFM69, 433mhz
        RFLink GW - Arduino Mega + RFLink Shield, 433mhz

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        • the cosmic gateT the cosmic gate

          I'am not getting this clear / working :(
          Could somebody help me to complete this 3in1 incl battery monitoring sketch working? Thnx

          AWIA Offline
          AWIA Offline
          AWI
          Hero Member
          wrote on last edited by AWI
          #13

          @the-cosmic-gate

          I changed your original sketch a little. It now includes a conditional send for the "tripped" values and groups the conditional sends for all values.

          I was not able to test as I'm using a different library for the DHT.

          Have fun..

          #include <SPI.h>
          #include <MySensor.h>  
          #include <DHT.h>  
          
          int BATTERY_SENSE_PIN = A0;  // select the input pin for the battery sense point
          
          #define CHILD_ID_HUM 0
          #define CHILD_ID_TEMP 1
          #define CHILD_ID_MOT 2   // Id of the sensor child
          
          #define HUMIDITY_SENSOR_DIGITAL_PIN 4
          #define DIGITAL_INPUT_SENSOR 3   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
          #define INTERRUPT DIGITAL_INPUT_SENSOR-2 // Usually the interrupt = pin -2 (on uno/nano anyway)
          
          unsigned long SLEEP_TIME = 30000UL; // Sleep time between reads (in milliseconds)
          int oldBatteryPcnt = 0;
          
          MySensor gw;
          DHT dht;
          float lastTemp = 0 ;
          float lastHum = 0 ;
          boolean lastTripped = false ;
          boolean metric = true; 
          MyMessage msgHum(CHILD_ID_HUM, V_HUM);
          MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
          MyMessage msgMot(CHILD_ID_MOT, V_TRIPPED);
          
          void setup()  
          { 
             // use the 1.1 V internal reference
          #if defined(__AVR_ATmega2560__)
             analogReference(INTERNAL1V1);
          #else
             analogReference(INTERNAL);
          #endif
            gw.begin();
            dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN. DHT22); 
          
            // Send the Sketch Version Information to the Gateway
            gw.sendSketchInfo("Humidity/Motion", "1.0");
          
          
           pinMode(DIGITAL_INPUT_SENSOR, INPUT);      // sets the motion sensor digital pin as input
           
            // Register all sensors to gw (they will be created as child devices)
            gw.present(CHILD_ID_HUM, S_HUM);
            gw.present(CHILD_ID_TEMP, S_TEMP);
            gw.present(CHILD_ID_MOT, S_MOTION);
             
            metric = gw.getConfig().isMetric;
          }
          
          void loop()      
          
          {  
            // get the battery Voltage
             int sensorValue = analogRead(BATTERY_SENSE_PIN);
             #ifdef DEBUG
             Serial.println(sensorValue);
             #endif
             
             // 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
             float batteryV  = sensorValue * 0.003363075;
             int batteryPcnt = sensorValue / 10;
          
             #ifdef DEBUG
             Serial.print("Battery Voltage: ");
             Serial.print(batteryV);
             Serial.println(" V");
          
             Serial.print("Battery percent: ");
             Serial.print(batteryPcnt);
             Serial.println(" %");
             #endif
          
             if (oldBatteryPcnt != batteryPcnt) {
               // Power up radio after sleep
               gw.sendBatteryLevel(batteryPcnt);
               oldBatteryPcnt = batteryPcnt;
             }
               
               
            // Read digital motion value
            boolean tripped = digitalRead(DIGITAL_INPUT_SENSOR) == HIGH; 
            
            if (tripped != lastTripped ) {      
            	Serial.println(tripped);
            	gw.send(msgMot.set(tripped?"1":"0"));  // Send tripped value to gw 
            }
            delay(dht.getMinimumSamplingPeriod());
          
            float temperature = dht.getTemperature();
            float humidity = dht.getHumidity();
            
            if (isnan(temperature)) {
                Serial.println("Failed reading temperature from DHT");
            } else if (temperature != lastTemp) {
              lastTemp = temperature;
              if (!metric) {
                temperature = dht.toFahrenheit(temperature);
              }
              gw.send(msgTemp.set(temperature, 1));
              Serial.print("T: ");
              Serial.println(temperature);
            }
            
            if (isnan(humidity)) {
                Serial.println("Failed reading humidity from DHT");
            } else if (humidity != lastHum) {
                lastHum = humidity;
                gw.send(msgHum.set(humidity, 1));
                Serial.print("H: ");
                Serial.println(humidity);
            }
          
             if (oldBatteryPcnt != batteryPcnt) {
               // Power up radio after sleep
               gw.sendBatteryLevel(batteryPcnt);
               oldBatteryPcnt = batteryPcnt;
             }
            
           
            // Sleep until interrupt comes in on motion sensor. Send update every two minute. 
            gw.sleep(INTERRUPT,CHANGE, SLEEP_TIME);
          }
          
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          • the cosmic gateT Offline
            the cosmic gateT Offline
            the cosmic gate
            wrote on last edited by
            #14

            Thnx a lot @AWI
            there was 1 verification error,

            dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN. DHT22); 
            

            changed it, to :

            #include <SPI.h>
            #include <MySensor.h>  
            #include <DHT.h>  
            
            int BATTERY_SENSE_PIN = A0;  // select the input pin for the battery sense point
            
            #define CHILD_ID_HUM 0
            #define CHILD_ID_TEMP 1
            #define CHILD_ID_MOT 2   // Id of the sensor child
            
            #define HUMIDITY_SENSOR_DIGITAL_PIN 4
            #define DIGITAL_INPUT_SENSOR 3   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
            #define INTERRUPT DIGITAL_INPUT_SENSOR-2 // Usually the interrupt = pin -2 (on uno/nano anyway)
            
            unsigned long SLEEP_TIME = 30000UL; // Sleep time between reads (in milliseconds)
            int oldBatteryPcnt = 0;
            
            MySensor gw;
            DHT dht;
            float lastTemp = 0 ;
            float lastHum = 0 ;
            boolean lastTripped = false ;
            boolean metric = true; 
            MyMessage msgHum(CHILD_ID_HUM, V_HUM);
            MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
            MyMessage msgMot(CHILD_ID_MOT, V_TRIPPED);
            
            void setup()  
            { 
               // use the 1.1 V internal reference
            #if defined(__AVR_ATmega2560__)
               analogReference(INTERNAL1V1);
            #else
               analogReference(INTERNAL);
            #endif
              gw.begin();
              dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
            
              // Send the Sketch Version Information to the Gateway
              gw.sendSketchInfo("Humidity/Motion", "1.0");
            
            
             pinMode(DIGITAL_INPUT_SENSOR, INPUT);      // sets the motion sensor digital pin as input
             
              // Register all sensors to gw (they will be created as child devices)
              gw.present(CHILD_ID_HUM, S_HUM);
              gw.present(CHILD_ID_TEMP, S_TEMP);
              gw.present(CHILD_ID_MOT, S_MOTION);
               
              metric = gw.getConfig().isMetric;
            }
            
            void loop()      
            
            {  
              // get the battery Voltage
               int sensorValue = analogRead(BATTERY_SENSE_PIN);
               #ifdef DEBUG
               Serial.println(sensorValue);
               #endif
               
               // 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
               float batteryV  = sensorValue * 0.003363075;
               int batteryPcnt = sensorValue / 10;
            
               #ifdef DEBUG
               Serial.print("Battery Voltage: ");
               Serial.print(batteryV);
               Serial.println(" V");
            
               Serial.print("Battery percent: ");
               Serial.print(batteryPcnt);
               Serial.println(" %");
               #endif
            
               if (oldBatteryPcnt != batteryPcnt) {
                 // Power up radio after sleep
                 gw.sendBatteryLevel(batteryPcnt);
                 oldBatteryPcnt = batteryPcnt;
               }
                 
                 
              // Read digital motion value
              boolean tripped = digitalRead(DIGITAL_INPUT_SENSOR) == HIGH; 
              
              if (tripped != lastTripped ) {      
                Serial.println(tripped);
                gw.send(msgMot.set(tripped?"1":"0"));  // Send tripped value to gw 
              }
              delay(dht.getMinimumSamplingPeriod());
            
              float temperature = dht.getTemperature();
              float humidity = dht.getHumidity();
              
              if (isnan(temperature)) {
                  Serial.println("Failed reading temperature from DHT");
              } else if (temperature != lastTemp) {
                lastTemp = temperature;
                if (!metric) {
                  temperature = dht.toFahrenheit(temperature);
                }
                gw.send(msgTemp.set(temperature, 1));
                Serial.print("T: ");
                Serial.println(temperature);
              }
              
              if (isnan(humidity)) {
                  Serial.println("Failed reading humidity from DHT");
              } else if (humidity != lastHum) {
                  lastHum = humidity;
                  gw.send(msgHum.set(humidity, 1));
                  Serial.print("H: ");
                  Serial.println(humidity);
              }
            
               if (oldBatteryPcnt != batteryPcnt) {
                 // Power up radio after sleep
                 gw.sendBatteryLevel(batteryPcnt);
                 oldBatteryPcnt = batteryPcnt;
               }
              
             
              // Sleep until interrupt comes in on motion sensor. Send update every two minute. 
              gw.sleep(INTERRUPT,CHANGE, SLEEP_TIME);
            }
            

            uploading now

            There's more than meets the eye

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            • the cosmic gateT Offline
              the cosmic gateT Offline
              the cosmic gate
              wrote on last edited by
              #15

              working nice for 2 day's now !
              Thnx a lot @AWI !!!

              There's more than meets the eye

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              • the cosmic gateT Offline
                the cosmic gateT Offline
                the cosmic gate
                wrote on last edited by
                #16

                Something strange: when I look in the IDE console the battery % is displayed. But using Domoticz there's no battery % display / selectable ? What's wrong , or do I forget something ?

                There's more than meets the eye

                1 Reply Last reply
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                • icebobI Offline
                  icebobI Offline
                  icebob
                  wrote on last edited by
                  #17

                  In Domoticz you can see the battery level in Setup->Devices.
                  domi_batt_level.png
                  If you would like to see on a chart, you have to send the battery level or voltage to the controller as a sensor value too. After it, you can see as this:
                  domi_batt_chart.png

                  T 1 Reply Last reply
                  0
                  • icebobI icebob

                    In Domoticz you can see the battery level in Setup->Devices.
                    domi_batt_level.png
                    If you would like to see on a chart, you have to send the battery level or voltage to the controller as a sensor value too. After it, you can see as this:
                    domi_batt_chart.png

                    T Offline
                    T Offline
                    Tronix
                    wrote on last edited by
                    #18

                    @icebob

                    Hi, I'm a newbee just started with MySensors. I built the first temp/hum sensor, and I'm trying to plot the battery level in a graph too. In this discussion you mention that I need to send the battery level to the controller as sensor value. Can you please share with me the code which I should use? Thanks a lot.

                    Marco

                    1 Reply Last reply
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                    • icebobI Offline
                      icebobI Offline
                      icebob
                      wrote on last edited by
                      #19

                      Yes, I can.

                      This is the definition of message for battery level:

                      // Battery sensor (A0)
                      #define CHILD_ID_BATTERY 199
                      #define BATTERY_SENSOR_ANALOG_PIN 0
                      MyMessage msgBattery(CHILD_ID_BATTERY, V_VOLTAGE);
                      

                      And this is the sender function:

                      // 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 0.003363075
                      #define VMIN 1.9  // Battery monitor lower level. Vmin_radio=1.9V
                      #define VMAX 3.00  // Vmin<Vmax<=3.44
                      #define VCC_CORRECTION (3.4 / 3.33)
                      int lastBatteryLevel;
                      
                      bool sendBatteryLevel(bool force = false) {
                        int value = analogRead(BATTERY_SENSOR_ANALOG_PIN);
                      
                        float batVoltage  = value * VBAT_PER_BITS / VCC_CORRECTION;
                        int batLevel = static_cast<int>(((batVoltage-VMIN)/(VMAX-VMIN))*100.);
                        if (batLevel != lastBatteryLevel || force) {
                          gw.sendBatteryLevel(batLevel);
                          gw.send(msgBattery.set(batVoltage, 2));
                          
                          lastBatteryLevel = batLevel;
                        }
                        return true;
                      }```
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                      • T Offline
                        T Offline
                        Tronix
                        wrote on last edited by
                        #20

                        Great, thanks for your quick response. Implementing now. Looks good.

                        1 Reply Last reply
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                        • the cosmic gateT Offline
                          the cosmic gateT Offline
                          the cosmic gate
                          wrote on last edited by
                          #21

                          Running the sketch for 1 Monty (+-), and the AA batteries are dead empty ?
                          I did all the "possible" mods on the arduino ( cut the LED an V ) , what can i do to make this sketch run langer on this 2AA batteries ?
                          Something in the sketch , some fine tuning or something else ?
                          When read the arduino hardware tweaking topics on different forums they dat that running for 1 year ( and more) is possible but how ;-)?

                          There's more than meets the eye

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                          • carlierdC Offline
                            carlierdC Offline
                            carlierd
                            wrote on last edited by
                            #22

                            Hello,

                            Did you measured the current of your circuit ?
                            What motion sensor are you using ? This component may consume a lot of current. Did you check this post ?

                            If you wake-up the arduino every 30 seconds for measurement it's a problem. Every 5 minutes is the minimum I think. I have connected the Vcc pin of the DHT sensors and the Vcc of the LDR to a digital pin of the arduino and when a measurement is done I set the PIN to the HIGH state.

                            First measurement of my sensor gives an IDLE current consumption close to 5uA which is really correct according to elements connected to the arduino (RFM69HW, DHT22 and LDR).

                            David.

                            the cosmic gateT 1 Reply Last reply
                            0
                            • bjacobseB Offline
                              bjacobseB Offline
                              bjacobse
                              wrote on last edited by
                              #23

                              Yes as Carlierd writes, it's important that the Arduino are controlling the voltage to the external components, like DHT.
                              I might have overlooked, but which component are you using for motion sensing? maybe this component is also power-hungry

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                              • icebobI Offline
                                icebobI Offline
                                icebob
                                wrote on last edited by
                                #24

                                @the-cosmic-gate Now I measured my dev circuit (Arduino Nano from China (cutted power led and desoldered regulator) + DHT22 + PIR + Battery measure resistor divider) and in gw.sleep (with 1 interrupt for PIR) the power comsumption is ~90uA.
                                DSC_9591_rs.jpg
                                It wakes up every minutes, measuring and sending (~100ms and 5 - 20mA).
                                So 100ms with 20mA and 59900ms with 0.09mA. The average current is 120uA and with 2 AA battery it is about 2 years.
                                ardu_batt.png

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                                • E Offline
                                  E Offline
                                  ericvdb
                                  wrote on last edited by
                                  #25

                                  @icebob,
                                  whats that app you are using to do the battery calculations?

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                                  • carlierdC Offline
                                    carlierdC Offline
                                    carlierd
                                    wrote on last edited by
                                    #26

                                    @icebob
                                    100ms for measurement and transmission seems very small ! I am at approximately 1500ms.
                                    Give me your secret now !! ;)

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                                    0
                                    • icebobI Offline
                                      icebobI Offline
                                      icebob
                                      wrote on last edited by
                                      #27

                                      @ericvdb http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=2680&dDocName=en545243. It's specified for PIC, but I select SLEEP mode in every cycle, so I can use for any uC.

                                      @carlierd: I have no extra secret. If I measure 3-4 sensor and every values is changed, the loop time is 100ms. Best case is 10-20ms (if every sensors is unchanged). I'm not using delay in the loop.

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                                      • carlierdC Offline
                                        carlierdC Offline
                                        carlierd
                                        wrote on last edited by
                                        #28

                                        @icebob: It's true that as I used signing feature, transmission is longer ! and in order to increase a little bit more I send every measure even if they not changed. I will probably upgrade my sketch to add a one-hour message at minimum and do not transfer mesure without change !

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                                        0
                                        • carlierdC carlierd

                                          Hello,

                                          Did you measured the current of your circuit ?
                                          What motion sensor are you using ? This component may consume a lot of current. Did you check this post ?

                                          If you wake-up the arduino every 30 seconds for measurement it's a problem. Every 5 minutes is the minimum I think. I have connected the Vcc pin of the DHT sensors and the Vcc of the LDR to a digital pin of the arduino and when a measurement is done I set the PIN to the HIGH state.

                                          First measurement of my sensor gives an IDLE current consumption close to 5uA which is really correct according to elements connected to the arduino (RFM69HW, DHT22 and LDR).

                                          David.

                                          the cosmic gateT Offline
                                          the cosmic gateT Offline
                                          the cosmic gate
                                          wrote on last edited by the cosmic gate
                                          #29

                                          @carlierd said:

                                          Hello,

                                          Did you measured the current of your circuit ?
                                          What motion sensor are you using ? This component may consume a lot of current. Did you check this post ?

                                          If you wake-up the arduino every 30 seconds for measurement it's a problem. Every 5 minutes is the minimum I think. I have connected the Vcc pin of the DHT sensors and the Vcc of the LDR to a digital pin of the arduino and when a measurement is done I set the PIN to the HIGH state.

                                          First measurement of my sensor gives an IDLE current consumption close to 5uA which is really correct according to elements connected to the arduino (RFM69HW, DHT22 and LDR).

                                          David.

                                          Hello David,
                                          I tried to meassure , but didn't have the right stuff to do this good enough.
                                          The parts i use for this "project": DHT-22 (connected to D4), HC-SR501 (connected to D3)and connected to the 3.3V pin post , the VVC is connected to the VVC of the arduino pro mini 8 Mhz /3.3 V .
                                          And use the sketch as above:

                                          #include <SPI.h>
                                          #include <MySensor.h>  
                                          #include <DHT.h>  
                                          
                                          int BATTERY_SENSE_PIN = A0;  // select the input pin for the battery sense point
                                          
                                          #define CHILD_ID_HUM 0
                                          #define CHILD_ID_TEMP 1
                                          #define CHILD_ID_MOT 2   // Id of the sensor child
                                          
                                          #define HUMIDITY_SENSOR_DIGITAL_PIN 4
                                          #define DIGITAL_INPUT_SENSOR 3   // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
                                          #define INTERRUPT DIGITAL_INPUT_SENSOR-2 // Usually the interrupt = pin -2 (on uno/nano anyway)
                                          
                                          unsigned long SLEEP_TIME = 30000UL; // Sleep time between reads (in milliseconds)
                                          int oldBatteryPcnt = 0;
                                          
                                          MySensor gw;
                                          DHT dht;
                                          float lastTemp = 0 ;
                                          float lastHum = 0 ;
                                          boolean lastTripped = false ;
                                          boolean metric = true; 
                                          MyMessage msgHum(CHILD_ID_HUM, V_HUM);
                                          MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
                                          MyMessage msgMot(CHILD_ID_MOT, V_TRIPPED);
                                          
                                          void setup()  
                                          { 
                                             // use the 1.1 V internal reference
                                          #if defined(__AVR_ATmega2560__)
                                             analogReference(INTERNAL1V1);
                                          #else
                                             analogReference(INTERNAL);
                                          #endif
                                            gw.begin();
                                            dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); 
                                          
                                            // Send the Sketch Version Information to the Gateway
                                            gw.sendSketchInfo("Humidity/Motion", "1.0");
                                          
                                          
                                           pinMode(DIGITAL_INPUT_SENSOR, INPUT);      // sets the motion sensor digital pin as input
                                           
                                            // Register all sensors to gw (they will be created as child devices)
                                            gw.present(CHILD_ID_HUM, S_HUM);
                                            gw.present(CHILD_ID_TEMP, S_TEMP);
                                            gw.present(CHILD_ID_MOT, S_MOTION);
                                             
                                            metric = gw.getConfig().isMetric;
                                          }
                                          
                                          void loop()      
                                          
                                          {  
                                            // get the battery Voltage
                                             int sensorValue = analogRead(BATTERY_SENSE_PIN);
                                             #ifdef DEBUG
                                             Serial.println(sensorValue);
                                             #endif
                                             
                                             // 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
                                             float batteryV  = sensorValue * 0.003363075;
                                             int batteryPcnt = sensorValue / 10;
                                          
                                             #ifdef DEBUG
                                             Serial.print("Battery Voltage: ");
                                             Serial.print(batteryV);
                                             Serial.println(" V");
                                          
                                             Serial.print("Battery percent: ");
                                             Serial.print(batteryPcnt);
                                             Serial.println(" %");
                                             #endif
                                          
                                             if (oldBatteryPcnt != batteryPcnt) {
                                               // Power up radio after sleep
                                               gw.sendBatteryLevel(batteryPcnt);
                                               oldBatteryPcnt = batteryPcnt;
                                             }
                                               
                                               
                                            // Read digital motion value
                                            boolean tripped = digitalRead(DIGITAL_INPUT_SENSOR) == HIGH; 
                                            
                                            if (tripped != lastTripped ) {      
                                              Serial.println(tripped);
                                              gw.send(msgMot.set(tripped?"1":"0"));  // Send tripped value to gw 
                                            }
                                            delay(dht.getMinimumSamplingPeriod());
                                          
                                            float temperature = dht.getTemperature();
                                            float humidity = dht.getHumidity();
                                            
                                            if (isnan(temperature)) {
                                                Serial.println("Failed reading temperature from DHT");
                                            } else if (temperature != lastTemp) {
                                              lastTemp = temperature;
                                              if (!metric) {
                                                temperature = dht.toFahrenheit(temperature);
                                              }
                                              gw.send(msgTemp.set(temperature, 1));
                                              Serial.print("T: ");
                                              Serial.println(temperature);
                                            }
                                            
                                            if (isnan(humidity)) {
                                                Serial.println("Failed reading humidity from DHT");
                                            } else if (humidity != lastHum) {
                                                lastHum = humidity;
                                                gw.send(msgHum.set(humidity, 1));
                                                Serial.print("H: ");
                                                Serial.println(humidity);
                                            }
                                          
                                             if (oldBatteryPcnt != batteryPcnt) {
                                               // Power up radio after sleep
                                               gw.sendBatteryLevel(batteryPcnt);
                                               oldBatteryPcnt = batteryPcnt;
                                             }
                                            
                                           
                                            // Sleep until interrupt comes in on motion sensor. Send update every two minute. 
                                            gw.sleep(INTERRUPT,CHANGE, SLEEP_TIME);
                                          }
                                          

                                          So how do you connect the DHT / SR501 to the digital pin, and what's the sketch you're using ?

                                          There's more than meets the eye

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