reporting battery to domoticZ

[sundberg84]

@fhenryco - if you are experience changes it might help adding a wait(); or delay(); to get a more stable reading. If something is using power just as you read it might be strange values.

This is one of my sketches (DHT + Bat): https://github.com/sundberg84/MySensors2.0.0/blob/master/NorrHumAs/NorrHumAs.ino and im using the voltage divider to A0 to measure the battery.

[fhenryco]

@sundberg84 thanks,
the delay 500 has a big effect , now i get 116% hence a battery voltage=3.5V, while the multimeter gives it 3V ! may be the internal reference is not 1.1V in my low cost chinese pro mini 3.3v .
BTW i did not understand why you have also a delay 500 after reading the analog pin, i would have thought that a delay before reading the analog pin is sufficient ... (?)

[sundberg84]

@fhenryco - could be the delay before is sufficient.

[fhenryco]

this morning , i get 102% , much closer to the actual value ... assuming that the ADC activity did not discharge my battery at an unprecedented level (i had this sketch working for two monthes with very little discharge of the battery before adding this battery monitoring functionality). I will know for sure if the battery level does not drop further in the coming days...i'm concerned that the delay 500 might produce non negligible battery consumption

[sundberg84]

@fhenryco Its hard to reach a 100% correct value on the chinese clones. I get a 5% off probably all the time. Because of that I have added an average so I collect three values every 20min into an array and send the average every hour.

[fhenryco]

ok, thanks again, something else i v been wondering about is why domoticz will show the temp + humidity sensor as a single sensor even though there are separate instructions
for the presentation :
present(CHILD_ID_HUM, S_HUM);
present(CHILD_ID_TEMP, S_TEMP);
and for the messages themselves
MyMessage msgHum(CHILD_ID_HUM, V_HUM);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
send(msgTemp.set(temperature, 1));
send(msgHum.set(humidity, 1));
what should be modified if i want domoticZ to treat the two sensors separately ? (this is for Yana, a speech recognition software that has a plugin for domoticZ, but apparantly is not able to handle several values for a given sensor).

is it the sendSketchInfo("TemperatureAndHumidity", "1.1"); that needs to be replaced by two sendSketchInfo, one for temp and one for humidity ?

[fhenryco]

@fhenryco apparantly something like send(msgTemp.setSensor(CHILD_ID_TEMP).set(temperature,1));
send(msgHum.setSensor(CHILD_ID_HUM).set(humidity,1));
should do the job ! going to try that
but i'm surprised this is not done by default since msgHum and msgTemp are defined separately for each sensor Id

[fhenryco]

@fhenryco it did nothing different ... still have a single sensor temp+hum don't understand why ...

[sundberg84]

@fhenryco - Yes, and there is a trick to seperate them... and i if I remembe right @AWI is the one to ask.

Edit, found his post here: https://forum.mysensors.org/topic/5132/ds18b20-ans-sht31-d-show-up-as-combined-sensors-on-domoticz/13

[fhenryco]

using V_text and S_info is a workaround to avoid grouping

[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..

[fhenryco]

@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 .

[AWI]

@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

[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

[Rene046]

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

[fhenryco]

@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));

[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++;
     }
}```

[Rene046]

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

[Rene046]

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

[AWI]

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