openHab binding 2.4.0 Variable Problem (

  • @TimO I posted something in the thread but just did another full round of testing to be sure so adding a new thread to get the conversation started. I have just set a test node that sits on my desk and have added the var1 item to an already well working test node - it is a switch and was not using any vars etc. So I editted the node code and added a loop request for var1 every 30 seconds.

    Here is the code for this node

     * 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 - Henrik Ekblad
     * Example sketch showing how to control physical relays.
     * This example will remember relay state after power failure.
    // Enable debug prints to serial monitor
    #define MY_DEBUG
    // Enable and select radio type attached
    #define MY_RADIO_NRF24
    #define MY_RF24_CHANNEL 82
    #define MY_RF24_IRQ_PIN 2
    #define MY_NODE_ID 27  // Set this to fix your Radio ID or use Auto
    // Enable repeater functionality for this node
    #include <MySensors.h>
    #define RELAY_1  3  // Arduino Digital I/O pin number for first relay (second on pin+1 etc)
    #define NUMBER_OF_RELAYS 1 // Total number of attached relays
    #define RELAY_ON 0  // GPIO value to write to turn on attached relay
    #define RELAY_OFF 1 // GPIO value to write to turn off attached relay
    #define RELAY_UNKNOWN 2
    unsigned long requestVar1Last = millis();
    unsigned long requestVar1Time = 30000;
    MyMessage relayMsg(0, V_STATUS);
    void before() {
    void setup()
      for (int sensor=1, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
        // Then set relay pins in output mode
        pinMode(pin, OUTPUT);
        SetState[sensor] = RELAY_OFF;
        request(sensor, V_STATUS);
        request(sensor, V_VAR1);
    void presentation()
      // Send the sketch version information to the gateway and Controller
      sendSketchInfo("Power Socket (7)", "4.1");
      for (int sensor=1; sensor<=NUMBER_OF_RELAYS; sensor++) {
        // Register all sensors to gw (they will be created as child devices)
        present(sensor, S_BINARY);
    void loop()
      for (int sensor=1, pin=RELAY_1; sensor<=NUMBER_OF_RELAYS; sensor++, pin++) {
          if (CurrentState[sensor] != SetState[sensor] && SetState[sensor] != RELAY_UNKNOWN) {
            digitalWrite(pin, SetState[sensor]?RELAY_ON:RELAY_OFF);
            CurrentState[sensor] = SetState[sensor];   
            resend(relayMsg.setSensor(sensor).set(CurrentState[sensor]), 5);  
      if (requestVar1Last + requestVar1Time < millis()) {
         request(1, V_VAR1);
         requestVar1Last = millis();
    void resend(MyMessage &msg, int repeats)
      int repeat = 1;
      int repeatdelay = 0;
      boolean sendOK = false;
      while ((sendOK == false) and (repeat < repeats)) {
        if (send(msg)) {
          sendOK = true;
        } else {
          sendOK = false;
          Serial.print("Send Failed: ");
          repeatdelay += 50;
        } repeat++; wait(repeatdelay);
    void receive(const MyMessage &message)
      int sensor = message.sensor;
      // We only expect one type of message from controller. But we better check anyway.
      if (message.type==V_STATUS) {
        // Change relay state
        SetState[sensor] = message.getBool();
        // Write some debug info
        Serial.print(F("Incoming change for sensor:"));
        Serial.print(F(", New status: "));
      if (message.type == V_VAR1) {
        int variable1 = atoi(;// RUN_ALL_ZONES time
        Serial.print(F("Recieved variable1: "));

    I added the item to openHab ad follows:

    Switch   Desktop_Debug_Light "Desktop Debug Light" <light> (gDevices,gRoom_Office) [ "iss:type:DevSwitch", "iss:room:Entry" ]  {channel="mysensors:light:gateway:Desktop_Debug_Light:status"}
    Number  Desktop_Debug_Var1 "Desktop Debug Light- Var1 [%d]" <selfruntime>  (gDevices,gRoom_Office)   {channel="mysensors:light:gateway:Desktop_Debug_Light:var1"}

    I used Paper UI and set the variable to 10 - this pushed the update to the node correctly. I then rebooted openHab which using persistance restores the variable 1 value back to 10 however when the node requests var1 from the controller after the reboot it receives 0. I have found this to be the same if I do an postUpdate. The var1 container on openHab has the 10 value in it I have confirmed this with a Rest API commnd the GET the item.

    Here is the logs from the openHab log:tail and also the node I have added comments where the reboot happened and you will see the results:

    2018-08-28 08:23:22.581 [.ItemChannelLinkAddedEvent] - Link 'Desktop_Debug_Var1-mysensors:light:gateway:Desktop_Debug_Light:var1' has been added.
    2018-08-28 08:24:08.812 [ome.event.ItemCommandEvent] - Item 'Desktop_Debug_Var1' received command 10
    2018-08-28 08:24:08.829 [vent.ItemStateChangedEvent] - Desktop_Debug_Var1 changed from NULL to 10
    2018-08-28 08:27:40.145 [temChannelLinkRemovedEvent] - Link 'Desktop_Debug_Var1 => mysensors:light:gateway:Desktop_Debug_Light:var1' has been removed.
    2018-08-28 08:28:57.469 [.ItemChannelLinkAddedEvent] - Link 'Desktop_Debug_Var1-mysensors:light:gateway:Desktop_Debug_Light:var1' has been added.
    2018-08-28 08:29:08.389 [vent.ItemStateChangedEvent] - Desktop_Debug_Var1 changed from NULL to 10.0
    2280 TSF:MSG:SEND,27-27-0-0,s=1,c=2,t=24,pt=0,l=0,sg=0,ft=0,st=OK:
    2286 MCO:BGN:INIT OK,TSP=1
    2290 TSF:MSG:SEND,27-27-0-0,s=1,c=1,t=2,pt=2,l=2,sg=0,ft=0,st=OK:1
    2317 TSF:MSG:READ,0-0-27,s=1,c=1,t=2,pt=0,l=1,sg=0:1
    Incoming change for sensor:1, New status: 1
    2521 TSF:MSG:READ,0-0-27,s=1,c=1,t=24,pt=0,l=2,sg=0:10
    Recieved variable1: 10
    30002 TSF:MSG:SEND,27-27-0-0,s=1,c=2,t=24,pt=0,l=0,sg=0,ft=0,st=OK:
    30026 TSF:MSG:READ,0-0-27,s=1,c=1,t=24,pt=0,l=2,sg=0:10
    Recieved variable1: 10
    ***** REBOOT OF OPENHAB SERVER *******
    60010 TSF:MSG:SEND,27-27-0-0,s=1,c=2,t=24,pt=0,l=0,sg=0,ft=0,st=OK:
    90018 TSF:MSG:SEND,27-27-0-0,s=1,c=2,t=24,pt=0,l=0,sg=0,ft=0,st=OK:
    120026 TSF:MSG:SEND,27-27-0-0,s=1,c=2,t=24,pt=0,l=0,sg=0,ft=0,st=OK:
    150038 TSF:MSG:SEND,27-27-0-0,s=1,c=2,t=24,pt=0,l=0,sg=0,ft=0,st=OK:
    ***** OPENHAB UP AGAIN ********
    150090 TSF:MSG:READ,0-0-27,s=1,c=1,t=24,pt=0,l=1,sg=0:0
    Recieved variable1: 0
    180046 TSF:MSG:SEND,27-27-0-0,s=1,c=2,t=24,pt=0,l=0,sg=0,ft=0,st=OK:
    180071 TSF:MSG:READ,0-0-27,s=1,c=1,t=24,pt=0,l=1,sg=0:0
    Recieved variable1: 0
    210054 TSF:MSG:SEND,27-27-0-0,s=1,c=2,t=24,pt=0,l=0,sg=0,ft=0,st=OK:
    210073 TSF:MSG:READ,0-0-27,s=1,c=1,t=24,pt=0,l=1,sg=0:0
    Recieved variable1: 0

    You can see the PaperUI update at 2018-08-28 08:24:08.829 which corresponds with the 30026 TSF:MSG:READ,0-0-27,s=1,c=1,t=24,pt=0,l=2,sg=0:10. I then rebooted and the server restored the value of 10 but the node continues to receive 0 and does so for ever - it never gets the value 10.

    Here is the output of the item using the REST API which is taken well after the reboot and after many request(1,V_VAR1)'s is still reporting 0.

      "link": "http://openhabianpi:8080/rest/items/Desktop_Debug_Var1",
      "state": "10.0",
      "stateDescription": {
        "pattern": "%d",
        "readOnly": false,
        "options": []
      "editable": false,
      "type": "Number",
      "name": "Desktop_Debug_Var1",
      "label": "Desktop Debug Light- Var1",
      "category": "selfruntime",
      "tags": [],
      "groupNames": [

    As mentioned the variable received at the node never updates also if we use a postUpdate in openHab it will continue to receive 0 until we issue a sendCommand at which time it will update until the next postUpdate or server reboot.