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Heartbeat for nodeMCU running API sketch

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  • Heartbeat for nodeMCU running API sketch

    I now have 5 nodeMCUs in production and wanted a better way to know they are working. I reverted to an old school heartbeat.

    First I created an input on each node and that created a HS3 device. I set them for value and string. They are device 5 in my case.

    Then I added the following code to the sketches for each node.

    The HS3 device changes the timestamp every 5 minutes if the node is working properly. I can test against that timestamp in events as well as report the status of each node on my HSTouch application.

    Code:
    int Heartbeat = 5;        //  virtual device for heartbeat logging. Set it to the PI Board device or zero if not used
    
    // Heartbeat Variables
    unsigned long HeartbeatCurrentMillis = 0;
    unsigned long HeartbeatPreviousMillis = 0;
    
    // **************  Start Heartbeat  ****************
    // ***** Updates a virtual heartbeat device     ****
    // ***** timestamp in HS3 once every 5 minutes  ****
      if (Heartbeat) {
        if (HeartbeatCurrentMillis == 0) {    // first time since startup
            SendToHS(Heartbeat,0);            // toggle device to get timestamp to update
            SendToHS(Heartbeat,100);
            HeartbeatPreviousMillis = millis();      
        }
        HeartbeatCurrentMillis = millis();
        if ((HeartbeatCurrentMillis - HeartbeatPreviousMillis) > (5 * 60 * 1000)) {   // update every 5minutes
            SendToHS(Heartbeat,0);          // toggle device to get timestamp to update
            SendToHS(Heartbeat,100);
            HeartbeatPreviousMillis = millis();       
        }
      }
    // **************  End Heartbeat  ****************
    Last edited by logbuilder; June 26th, 2017, 11:16 PM.

  • #2
    Logbuilder, it looks great, thanks for sharing.

    Sent from my SM-G935V using Tapatalk

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