How to include the battery measurement?
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I am trying to build a sensor with a DHT22 and for now on a solar panel and a battery.
I want to see the battery level within Domoticz.
I cannot seem to merge both the battery sketch and the DHT sketch together.
Most of the times i get an error about a { being in a place where it should not belong.
I think i lost it :smiley: and i am going mad soon.
Also how to send the battery level to Domoticz? i tried the battery sketch alone and nothing happens.Most of the times i get an error about a { being in a place where it should not belong.
Its easier for us if you post the code so we can have a look if you want help :)
Also how to send the battery level to Domoticz?
Well, before 2.0 it was gw.sendBatteryLevel(batteryPcnt); and now it is sendBatteryLevel(batteryPcnt);
The battery% needs to be attached to a sensor - so it will be displayed in the deviced tab if you look at the device/sensor. -
sendBatteryLevel doesn't do anything.
I have modified it a bit and now i have some readings.
I will do a bit more playing to see where i will end.@tlpeter - it does, but it needs to be together with a sensor. You will find it in "devices".
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I have the voltage part working and i think also the battery percentage with it.
I build the sketch like this. Can you have a little look?/** * The MySensors Arduino library handles the wireless radio link and protocol * between your home built sensors/actuators and HA controller of choice. * The sensors forms a self healing radio network with optional repeaters. Each * repeater and gateway builds a routing tables in EEPROM which keeps track of the * network topology allowing messages to be routed to nodes. * * Created by Henrik Ekblad <henrik.ekblad@mysensors.org> * Copyright (C) 2013-2015 Sensnology AB * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors * * Documentation: http://www.mysensors.org * Support Forum: http://forum.mysensors.org * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * ******************************* * * DESCRIPTION * * This is an example that demonstrates how to report the battery level for a sensor * Instructions for measuring battery capacity on A0 are available here: * http://www.mysensors.org/build/battery * */ // 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> #define CHILD_ID_BATT 0 #define CHILD_ID_HUM 1 #define CHILD_ID_TEMP 2 #define DHT_DATA_PIN 3 // Set this to the pin you connected the DHT's data pin to int BATTERY_SENSE_PIN = A0; // select the input pin for the battery sense point // Set this offset if the sensor has a permanent small offset to the real temperatures #define SENSOR_TEMP_OFFSET 0 static const uint64_t UPDATE_INTERVAL = 30000; // Force sending an update of the temperature after n sensor reads, so a controller showing the // timestamp of the last update doesn't show something like 3 hours in the unlikely case, that // the value didn't change since; // i.e. the sensor would force sending an update every UPDATE_INTERVAL*FORCE_UPDATE_N_READS [ms] static const uint8_t FORCE_UPDATE_N_READS = 10; //unsigned long SLEEP_TIME = 9000; // sleep time between reads (seconds * 1000 milliseconds) int oldBatteryPcnt = 0; float lastTemp; float lastHum; uint8_t nNoUpdatesTemp; uint8_t nNoUpdatesHum; boolean metric = true; MyMessage msgBatt(CHILD_ID_BATT, V_VOLTAGE); MyMessage msgHum(CHILD_ID_HUM, V_HUM); MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP); DHT dht; void setup() { // use the 1.1 V internal reference #if defined(__AVR_ATmega2560__) analogReference(INTERNAL1V1); #else analogReference(INTERNAL); #endif //} { dht.setup(DHT_DATA_PIN); // set data pin of DHT sensor if (UPDATE_INTERVAL <= dht.getMinimumSamplingPeriod()) { Serial.println("Warning: UPDATE_INTERVAL is smaller than supported by the sensor!"); } // Sleep for the time of the minimum sampling period to give the sensor time to power up // (otherwise, timeout errors might occure for the first reading) sleep(dht.getMinimumSamplingPeriod()); } } void presentation() { // Send the sketch version information to the gateway and Controller sendSketchInfo("Battery Meter", "1.0"); present(CHILD_ID_BATT, S_MULTIMETER); wait(20); present(CHILD_ID_HUM, S_HUM); wait(20); present(CHILD_ID_TEMP, S_TEMP); wait(20); metric = getConfig().isMetric; } void loop() { // get the battery Voltage int sensorValue = analogRead(BATTERY_SENSE_PIN); #ifdef MY_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 int batteryPcnt = sensorValue / 10; #ifdef MY_DEBUG float batteryV = sensorValue * 0.003363075; 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 send(msgBatt.set(batteryV, 1)); //sendBatteryLevel(batteryPcnt); oldBatteryPcnt = batteryPcnt; } { // Force reading sensor, so it works also after sleep() dht.readSensor(true); // Get temperature from DHT library float temperature = dht.getTemperature(); if (isnan(temperature)) { Serial.println("Failed reading temperature from DHT!"); } else if (temperature != lastTemp || nNoUpdatesTemp == FORCE_UPDATE_N_READS) { // Only send temperature if it changed since the last measurement or if we didn't send an update for n times lastTemp = temperature; if (!metric) { temperature = dht.toFahrenheit(temperature); } // Reset no updates counter nNoUpdatesTemp = 0; temperature += SENSOR_TEMP_OFFSET; send(msgTemp.set(temperature, 1)); #ifdef MY_DEBUG Serial.print("T: "); Serial.println(temperature); #endif } else { // Increase no update counter if the temperature stayed the same nNoUpdatesTemp++; } // Get humidity from DHT library float humidity = dht.getHumidity(); if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else if (humidity != lastHum || nNoUpdatesHum == FORCE_UPDATE_N_READS) { // Only send humidity if it changed since the last measurement or if we didn't send an update for n times lastHum = humidity; // Reset no updates counter nNoUpdatesHum = 0; send(msgHum.set(humidity, 1)); #ifdef MY_DEBUG Serial.print("H: "); Serial.println(humidity); #endif } else { // Increase no update counter if the humidity stayed the same nNoUpdatesHum++; } //sleep(SLEEP_TIME); sleep(UPDATE_INTERVAL); }}``` -
I have the voltage part working and i think also the battery percentage with it.
I build the sketch like this. Can you have a little look?/** * The MySensors Arduino library handles the wireless radio link and protocol * between your home built sensors/actuators and HA controller of choice. * The sensors forms a self healing radio network with optional repeaters. Each * repeater and gateway builds a routing tables in EEPROM which keeps track of the * network topology allowing messages to be routed to nodes. * * Created by Henrik Ekblad <henrik.ekblad@mysensors.org> * Copyright (C) 2013-2015 Sensnology AB * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors * * Documentation: http://www.mysensors.org * Support Forum: http://forum.mysensors.org * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * ******************************* * * DESCRIPTION * * This is an example that demonstrates how to report the battery level for a sensor * Instructions for measuring battery capacity on A0 are available here: * http://www.mysensors.org/build/battery * */ // 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> #define CHILD_ID_BATT 0 #define CHILD_ID_HUM 1 #define CHILD_ID_TEMP 2 #define DHT_DATA_PIN 3 // Set this to the pin you connected the DHT's data pin to int BATTERY_SENSE_PIN = A0; // select the input pin for the battery sense point // Set this offset if the sensor has a permanent small offset to the real temperatures #define SENSOR_TEMP_OFFSET 0 static const uint64_t UPDATE_INTERVAL = 30000; // Force sending an update of the temperature after n sensor reads, so a controller showing the // timestamp of the last update doesn't show something like 3 hours in the unlikely case, that // the value didn't change since; // i.e. the sensor would force sending an update every UPDATE_INTERVAL*FORCE_UPDATE_N_READS [ms] static const uint8_t FORCE_UPDATE_N_READS = 10; //unsigned long SLEEP_TIME = 9000; // sleep time between reads (seconds * 1000 milliseconds) int oldBatteryPcnt = 0; float lastTemp; float lastHum; uint8_t nNoUpdatesTemp; uint8_t nNoUpdatesHum; boolean metric = true; MyMessage msgBatt(CHILD_ID_BATT, V_VOLTAGE); MyMessage msgHum(CHILD_ID_HUM, V_HUM); MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP); DHT dht; void setup() { // use the 1.1 V internal reference #if defined(__AVR_ATmega2560__) analogReference(INTERNAL1V1); #else analogReference(INTERNAL); #endif //} { dht.setup(DHT_DATA_PIN); // set data pin of DHT sensor if (UPDATE_INTERVAL <= dht.getMinimumSamplingPeriod()) { Serial.println("Warning: UPDATE_INTERVAL is smaller than supported by the sensor!"); } // Sleep for the time of the minimum sampling period to give the sensor time to power up // (otherwise, timeout errors might occure for the first reading) sleep(dht.getMinimumSamplingPeriod()); } } void presentation() { // Send the sketch version information to the gateway and Controller sendSketchInfo("Battery Meter", "1.0"); present(CHILD_ID_BATT, S_MULTIMETER); wait(20); present(CHILD_ID_HUM, S_HUM); wait(20); present(CHILD_ID_TEMP, S_TEMP); wait(20); metric = getConfig().isMetric; } void loop() { // get the battery Voltage int sensorValue = analogRead(BATTERY_SENSE_PIN); #ifdef MY_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 int batteryPcnt = sensorValue / 10; #ifdef MY_DEBUG float batteryV = sensorValue * 0.003363075; 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 send(msgBatt.set(batteryV, 1)); //sendBatteryLevel(batteryPcnt); oldBatteryPcnt = batteryPcnt; } { // Force reading sensor, so it works also after sleep() dht.readSensor(true); // Get temperature from DHT library float temperature = dht.getTemperature(); if (isnan(temperature)) { Serial.println("Failed reading temperature from DHT!"); } else if (temperature != lastTemp || nNoUpdatesTemp == FORCE_UPDATE_N_READS) { // Only send temperature if it changed since the last measurement or if we didn't send an update for n times lastTemp = temperature; if (!metric) { temperature = dht.toFahrenheit(temperature); } // Reset no updates counter nNoUpdatesTemp = 0; temperature += SENSOR_TEMP_OFFSET; send(msgTemp.set(temperature, 1)); #ifdef MY_DEBUG Serial.print("T: "); Serial.println(temperature); #endif } else { // Increase no update counter if the temperature stayed the same nNoUpdatesTemp++; } // Get humidity from DHT library float humidity = dht.getHumidity(); if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else if (humidity != lastHum || nNoUpdatesHum == FORCE_UPDATE_N_READS) { // Only send humidity if it changed since the last measurement or if we didn't send an update for n times lastHum = humidity; // Reset no updates counter nNoUpdatesHum = 0; send(msgHum.set(humidity, 1)); #ifdef MY_DEBUG Serial.print("H: "); Serial.println(humidity); #endif } else { // Increase no update counter if the humidity stayed the same nNoUpdatesHum++; } //sleep(SLEEP_TIME); sleep(UPDATE_INTERVAL); }}```@tlpeter - Im not a coding guy, but it looks good to me.
Myself i build my sketches, test and look at serial output and Domoticz output. When im happy with the result - i go for it.This is going to create two devices i think, one humidity/temp and one voltage. The batterypct and voltage will be seperated from humidity/temp i think even if they belong together. If you want the procentage in devices for the right device you just skip the voltage part.
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I have voltage now and a percentage at the devices.
Hum and temp do work fine.
I only sucked all the juice out of the battery so it is charging now by the little solar panel.
I found out that 2,4V was really the lowest voltage that worked :smile:@tlpeter If you want to suck more juice out of the batteries use a DC-DC step up booster: https://www.mysensors.org/store/#regulators then you can go down to 0.9V :)
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@tlpeter said:
if (oldBatteryPcnt != batteryPcnt) {
// Power up radio after sleep
send(msgBatt.set(batteryV, 1));
//sendBatteryLevel(batteryPcnt);
oldBatteryPcnt = batteryPcnt;
}Hi, This part should not have been updated
this part is icluded in the lib
So leave it like the exsample
if (oldBatteryPcnt != batteryPcnt) {
// Power up radio after sleep
sendBatteryLevel(batteryPcnt);
oldBatteryPcnt = batteryPcnt;
}For sending over your voltage you need one additional
send(msgBatt.set(batteryV, 1));
Good luck
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