Need some help with a Multi-Sensor Node

  • Hi,

    I'm working on making a multi-sensornode (PIR, Light, Temp and V_LIGHT (for night-light)), as well as a repeater node. So far though, I am having problems with the system reporting all the variables every second, instead of on change/every 10 seconds like I have in my sketch. I'm not sure where I am going wrong,. I need the device to only report changes, specifically on motion when it is detected, as well as to receive the V_STATUS message. Would someone please look over this and point me in the right direction? I've been looking at this off and on for a while now and I can't find anything that is majorly wrong.

     * 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 <>
     * Copyright (C) 2013-2015 Sensnology AB
     * Full contributor list:
     * Documentation:
     * Support Forum:
     * 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.
     * Version 1.0 - Derrick Rockwell (@Drock1985)
    // Enable debug prints
    #define MY_DEBUG
    // Enable and select radio type attached
    #define MY_RADIO_NRF24
    //#define MY_RADIO_RFM69
    #define MY_NODE_ID 21
    #include <SPI.h>
    #include <MySensors.h>
    #include <DallasTemperature.h>
    #include <OneWire.h>
    #include <BH1750.h>
    #include <Wire.h>
    unsigned long SLEEP_TIME = 120000;    // Sleep time between reports (in milliseconds)
    #define DIGITAL_INPUT_SENSOR 3        // The digital input you attached your motion sensor.  (Only 2 and 3 generates interrupt!)
    #define COMPARE_TEMP 1                // Send temperature only if changed? 1 = Yes 0 = No
    #define ONE_WIRE_BUS 4                // Pin where dallase sensor is connected 
    #define LED_ARRAY_1 5                   // Pin that controls the LED Light array (does not need to be a PWM pin)
    #define LED_ARRAY_2 6
    #define MAX_ATTACHED_DS18B20 2
    // #define MY_REPEATER_FEATURE           //Enables Repeater feature for non-battery powered nodes. 
    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. 
    int lastTemperature = 0;
    int numSensors=0;
    boolean receivedConfig = false;
    boolean metric = true;
    #define CHILD_ID_MOTION 1   // ID of the sensor child
    #define CHILD_ID_TEMP 2     // ID of Temperature Sensor
    #define CHILD_ID_LUX 3      // ID of Lux Sensor
    #define CHILD_ID_LIGHT 4    // ID of LED light array
    #define LIGHT_ON 1
    #define LIGHT_OFF 0
    BH1750 lightSensor;
    // Initialize  messages
    MyMessage msgMotion(CHILD_ID_MOTION, V_TRIPPED);
    MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
    MyMessage msgLux(CHILD_ID_LUX, V_LEVEL); //Sets up custom units (this case LUX for Light)
    MyMessage msgPrefix(CHILD_ID_LUX, V_UNIT_PREFIX); // Sends controller the LUX value instead of %
    MyMessage msgLight(CHILD_ID_LIGHT, V_STATUS);
    uint16_t lastlux = 0;
    int compareMotion = LOW;
    bool stateLight = 0; // Place holders for the loop function to register nodes in Home-Assistant
    bool initialValueSentLight = 0;
    void setup()  
      pinMode(DIGITAL_INPUT_SENSOR, INPUT);      // sets the motion sensor digital pin as input
      pinMode(LED_ARRAY_1, OUTPUT);                // sets the LED Array as an output
      pinMode(LED_ARRAY_2, OUTPUT);                // sets the LED Array as an output
      // Startup up the OneWire library
      // requestTemperatures() will not block current thread
    void presentation()  {
      // Send the sketch version information to the gateway and Controller
      sendSketchInfo("LuxMotionTempSensor", "1.0");
      // Register all sensors to gw (they will be created as child devices)
      present(CHILD_ID_MOTION, S_MOTION);
      present(CHILD_ID_TEMP, S_TEMP);
      present(CHILD_ID_LUX, S_LIGHT_LEVEL);
      present(CHILD_ID_LIGHT, S_LIGHT);
    void loop()     
      if (!initialValueSentLight) {
        Serial.println("Sending initial value");
        Serial.println("Requesting initial value from controller");
        request(CHILD_ID_LIGHT, V_STATUS);
        wait(2000, C_SET, V_STATUS);
      uint16_t lux = lightSensor.readLightLevel();// Get Lux value
      if (lux != lastlux) {
        Serial.println("Sending lux value");
          lastlux = lux;
       // Fetch temperatures from Dallas sensors
        // Fetch and round temperature to one decimal
        int temperature = (((sensors.getTempCByIndex(0)) * 10.)) / 10.;
        if (lastTemperature != temperature && temperature != -127.00 && temperature != 85.00) 
        Serial.println("Sending temperature");{
         // Send in the new temperature
          // Save new temperatures for next compare
          lastTemperature = temperature;
       // Read digital motion value
      boolean tripped = digitalRead(DIGITAL_INPUT_SENSOR) == HIGH; 
    //  if (compareMotion != tripped)  {
      Serial.println("Sending motion status");
      send(msgMotion.set(tripped?"1":"0"));  // Send tripped value to gw   
    //  compareMotion = tripped;
    //  }
    // sleep(digitalPinToInterrupt(DIGITAL_INPUT_SENSOR), CHANGE, SLEEP_TIME);
    void receive(const MyMessage &message) {
      if (message.isAck()) {
         Serial.println("This is an ack from gateway");
      if (message.type == V_STATUS && message.sensor == CHILD_ID_LIGHT) {
        if (!initialValueSentLight) {
          Serial.println("Receiving initial value from controller");
          initialValueSentLight = true;
        // Change relay state
        stateLight = (bool)message.getInt();
        digitalWrite(LED_ARRAY_1, stateLight?LIGHT_ON:LIGHT_OFF);
        digitalWrite(LED_ARRAY_2, stateLight?LIGHT_ON:LIGHT_OFF);


  • Mod

    @drock1985 the comparison for the tripped check is commented out, so it will send values every time. Uncomment it :)

    If that doesn't help, please post the debug output of the node.

Log in to reply

Looks like your connection to MySensors Forum was lost, please wait while we try to reconnect.