temp sensor keep on loging status switch

  • I have a working sensor that checks the temp om 2 places. If needed it wil switch on/of a Fan. That is all working perfect only this sensor logs continue the status of the switch. i am using Domoticz.
    the log looks like this:

    2017-01-05 19:24:18.747 EventSystem: Event triggered: ventilator aan/uit_2
    2017-01-05 19:24:18.741 (MySensors GW1) Temp (Temp serre)
    2017-01-05 19:24:18.960 (MySensors GW1) Lighting 2 (Temp Fan switch)
    2017-01-05 19:24:48.736 EventSystem: Event triggered: ventilator aan/uit_2
    2017-01-05 19:24:48.730 (MySensors GW1) Temp (Temp serre)
    2017-01-05 19:24:49.068 (MySensors GW1) Lighting 2 (Temp Fan switch)
    2017-01-05 19:26:49.032 EventSystem: Event triggered: ventilator aan/uit_2
    2017-01-05 19:26:49.027 (MySensors GW1) Temp (Temp binnen)
    2017-01-05 19:26:49.182 (MySensors GW1) Lighting 2 (Temp Fan switch)
    2017-01-05 19:27:49.049 EventSystem: Event triggered: ventilator aan/uit_2
    2017-01-05 19:27:49.044 (MySensors GW1) Temp (Temp serre)
    2017-01-05 19:27:49.291 (MySensors GW1) Lighting 2 (Temp Fan switch)
    2017-01-05 19:28:48.988 EventSystem: Event triggered: ventilator aan/uit_2
    2017-01-05 19:28:48.985 (MySensors GW1) Temp (Temp binnen)
    2017-01-05 19:28:49.401 (MySensors GW1) Lighting 2 (Temp Fan switch)
    2017-01-05 19:29:18.972 EventSystem: Event triggered: ventilator aan/uit_2 italicised text

    This is my code

    #include <MySensor.h>
    #include <SPI.h>
    #include <Bounce2.h>
    #include <DallasTemperature.h>
    #include <OneWire.h>
    // Partie Température
    #define COMPARE_TEMP 1 // Send temperature only if changed? 1 = Yes 0 = No
    #define ONE_WIRE_BUS 3 // Pin where dallase sensor is connected 
    #define MAX_ATTACHED_DS18B20 16
    unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds)
    OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
    DallasTemperature sensors(&oneWire); // Pass the oneWire reference to Dallas Temperature. 
    float lastTemperature[MAX_ATTACHED_DS18B20];
    int numSensors=0;
    boolean receivedConfig = false;
    boolean metric = true; 
    // Initialize temperature message
    MyMessage msg(0,V_TEMP);
    // Partie Relay
    #define RELAY_PIN  A1  // Arduino Digital I/O pinnumber for relay 
    #define BUTTON_PIN  A3   // Arduino Digital I/O pin number for button 
    #define CHILD_ID 17   // Id of the sensor child
    #define RELAY_ON 1
    #define RELAY_OFF 0
    Bounce debouncer = Bounce(); 
    int oldValue=0;
    bool state;
    unsigned long previousMillis = 0;
    MySensor gw;
    MyMessage msg2(CHILD_ID,V_LIGHT);
    void setup()  
      // Startup up the OneWire library
      // requestTemperatures() will not block current thread
      gw.begin(incomingMessage, AUTO, true);
      // Send the sketch version information to the gateway and Controller
      gw.sendSketchInfo("Relay & Button", "1.0");
      gw.sendSketchInfo("Temperature Sensor", "1.1");
        // Fetch the number of attached temperature sensors  
      numSensors = sensors.getDeviceCount();
      Serial.println(" temperature sensors detected");
     // Setup the button
      // Activate internal pull-up
      // After setting up the button, setup debouncer
      // Present all sensors to controller
      for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {   
         gw.present(i, S_TEMP);
      // Register all sensors to gw (they will be created as child devices)
      gw.present(CHILD_ID, S_LIGHT);
      // Make sure relays are off when starting up
      digitalWrite(RELAY_PIN, RELAY_OFF);
      // Then set relay pins in output mode
      pinMode(RELAY_PIN, OUTPUT);   
      // Set relay to last known state (using eeprom storage) 
      state = gw.loadState(CHILD_ID);
      digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF);
    *  Example on how to asynchronously check for new messages from gw
    void loop() 
      // Relay button
      // Get the update value
      int value = debouncer.read();
      if (value != oldValue && value==0) {
          gw.send(msg2.set(state?false:true), true); // Send new state and request ack back
      oldValue = value;
      // Fetch temperatures from Dallas sensors
      // query conversion time and sleep until conversion completed
      //int16_t conversionTime = sensors.millisToWaitForConversion(sensors.getResolution());
      unsigned long currentMillis = millis();
      // sleep() call can be replaced by wait() call if node need to process incoming messages (or if node is repeater)
      // gw.wait(conversionTime);
    // Read temperatures and send them to controller 
      if (currentMillis - previousMillis >= SLEEP_TIME) {
        // save the last time you read temperature
        previousMillis = currentMillis;
        for (int i=0; i<numSensors && i<MAX_ATTACHED_DS18B20; i++) {
          // Fetch and round temperature to one decimal
          float temperature = static_cast<float>(static_cast<int>((gw.getConfig().isMetric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;
          // Only send data if temperature has changed and no error
          #if COMPARE_TEMP == 1
          if (lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00) {
          if (temperature != -127.00 && temperature != 85.00) {
            // Send in the new temperature
            // Save new temperatures for next compare
    void incomingMessage(const MyMessage &message) {
      // We only expect one type of message from controller. But we better check anyway.
      if (message.isAck()) {
         Serial.println("This is an ack from gateway");
      if (message.type == V_LIGHT) {
         // Change relay state
         state = message.getBool();
         digitalWrite(RELAY_PIN, state?RELAY_ON:RELAY_OFF);
         // Store state in eeprom
         gw.saveState(CHILD_ID, state);
         // Write some debug info
         Serial.print("Incoming change for sensor:");
         Serial.print(", New status: ");

    Does anyone know why it produce that large amount of logs?

  • The nodes send the data every 30 second, the log is ok.
    You will get one line in the log very time a node report something.
    It look like you also have an Event that gets trigger every time one of the nodes send data.

  • Yes you are right there is an Event. Do I have to add a timer or delay function in it or something else?

  • Depends on what you want to do with these temp/relay?

    The log will still get all these lines even if you add a delay.

  • this sensor only messure the temp on 2 different locations and as seen in the Event, if the temp inside (TEMP binnen temp) <- 20 and the temp in the glasshouse is >-26 the fan switch on and the second part of the Event only switch of the Fan if the temp inside is to high (>-26) or the temp in the glasshouse is <-27. that is all I want with this project. I only want the mesurement every 15 min for example

  • Ok.

    Then change Sleeptime to 900000, today you have 30000

    900000 = 60000 * 15 minutes

  • that was easy, I do it right away. Thanks for the support and this stopped me for changing other parts of the event of the code of the sensor.
    Have a nice day!

  • This is not a battery node, right?

    Because this node never sleep, so it will consume battery all the time.

  • no good to mention, That is a new project for me to build an efficience battery powered node. In this case it is powered by an external power source.

  • 👍

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