Energy Monitoring



  • I want to use the LM393 sketch to monitor the pulses of my Power meter. But how do I make it register every blink? I still have not figured out how to make a sensor wake up instead of just using sleep.

    This is the sketch:

    /**
     * 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.
     *
     *******************************
     *
     * REVISION HISTORY
     * Version 1.0 - Henrik EKblad
     * 
     * DESCRIPTION
     * Example sketch showing how to measue light level using a LM393 photo-resistor 
     * http://www.mysensors.org/build/light
     */
    
    #include <SPI.h>
    #include <MySensor.h>  
    #include <MyTransportRFM69.h>
    #define CHILD_ID_LIGHT 0
    #define LIGHT_SENSOR_ANALOG_PIN 0
    
    unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds)
    MyTransportRFM69 transport(RFM69_FREQUENCY, RFM69_NETWORKID, RF69_SPI_CS, RF69_IRQ_PIN, false, RF69_IRQ_NUM);
    MySensor gw(transport);
    MyMessage msg(CHILD_ID_LIGHT, V_LIGHT_LEVEL);
    int lastLightLevel;
    
    void setup()  
    { 
      gw.begin();
    
      // Send the sketch version information to the gateway and Controller
      gw.sendSketchInfo("Light Sensor", "1.0");
    
      // Register all sensors to gateway (they will be created as child devices)
      gw.present(CHILD_ID_LIGHT, S_LIGHT_LEVEL);
    }
    
    void loop()      
    {     
      int lightLevel = (1023-analogRead(LIGHT_SENSOR_ANALOG_PIN))/10.23; 
      Serial.println(lightLevel);
      if (lightLevel != lastLightLevel) {
          gw.send(msg.set(lightLevel));
          lastLightLevel = lightLevel;
      }
      gw.sleep(SLEEP_TIME);
    }
    
    
    


  • Ah, don't know how I could have missed it.

    [http://www.mysensors.org/build/pulse_power](Power meter pulse sensor)



  • Can't get it to work. The sensor detects the power meter blinks and is presented as Energy monitor in the domoticz log. But it does not show under devices.

    /**
     * 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.
     *
     *******************************
     *
     * REVISION HISTORY
     * Version 1.0 - Henrik EKblad
     * 
     * DESCRIPTION
     * This sketch provides an example how to implement a distance sensor using HC-SR04 
     * Use this sensor to measure KWH and Watt of your house meeter
     * You need to set the correct pulsefactor of your meeter (blinks per KWH).
     * The sensor starts by fetching current KWH value from gateway.
     * Reports both KWH and Watt back to gateway.
     *
     * Unfortunately millis() won't increment when the Arduino is in 
     * sleepmode. So we cannot make this sensor sleep if we also want 
     * to calculate/report watt-number.
     * http://www.mysensors.org/build/pulse_power
     */
    
    #include <SPI.h>
    #include <MySensor.h>  
    
    #define DIGITAL_INPUT_SENSOR 3  // The digital input you attached your light sensor.  (Only 2 and 3 generates interrupt!)
    #define PULSE_FACTOR 1000       // Nummber of blinks per KWH of your meeter
    #define SLEEP_MODE false        // Watt-value can only be reported when sleep mode is false.
    #define MAX_WATT 10000          // Max watt value to report. This filetrs outliers.
    #define INTERRUPT DIGITAL_INPUT_SENSOR-2 // Usually the interrupt = pin -2 (on uno/nano anyway)
    #define CHILD_ID 1              // Id of the sensor child
    unsigned long SEND_FREQUENCY = 20000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
    MySensor gw;
    double ppwh = ((double)PULSE_FACTOR)/1000; // Pulses per watt hour
    boolean pcReceived = false;
    volatile unsigned long pulseCount = 0;   
    volatile unsigned long lastBlink = 0;
    volatile unsigned long watt = 0;
    unsigned long oldPulseCount = 0;   
    unsigned long oldWatt = 0;
    double oldKwh;
    unsigned long lastSend;
    MyMessage wattMsg(CHILD_ID,V_WATT);
    MyMessage kwhMsg(CHILD_ID,V_KWH);
    MyMessage pcMsg(CHILD_ID,V_VAR1);
    
    
    void setup()  
    {  
      gw.begin(incomingMessage);
    
      // Send the sketch version information to the gateway and Controller
      gw.sendSketchInfo("Energy Meter", "1.0");
    
      // Register this device as power sensor
      gw.present(CHILD_ID, S_POWER);
    
      // Fetch last known pulse count value from gw
      gw.request(CHILD_ID, V_VAR1);
      
      attachInterrupt(INTERRUPT, onPulse, RISING);
      lastSend=millis();
    }
    
    
    void loop()     
    { 
      gw.process();
      unsigned long now = millis();
      // Only send values at a maximum frequency or woken up from sleep
      bool sendTime = now - lastSend > SEND_FREQUENCY;
      if (pcReceived && (SLEEP_MODE || sendTime)) {
        // New watt value has been calculated  
        if (!SLEEP_MODE && watt != oldWatt) {
          // Check that we dont get unresonable large watt value. 
          // could hapen when long wraps or false interrupt triggered
          if (watt<((unsigned long)MAX_WATT)) {
            gw.send(wattMsg.set(watt));  // Send watt value to gw 
          }  
          Serial.print("Watt:");
          Serial.println(watt);
          oldWatt = watt;
        }
      
        // Pulse cout has changed
        if (pulseCount != oldPulseCount) {
          gw.send(pcMsg.set(pulseCount));  // Send pulse count value to gw 
          double kwh = ((double)pulseCount/((double)PULSE_FACTOR));     
          oldPulseCount = pulseCount;
          if (kwh != oldKwh) {
            gw.send(kwhMsg.set(kwh, 4));  // Send kwh value to gw 
            oldKwh = kwh;
          }
        }    
        lastSend = now;
      } else if (sendTime && !pcReceived) {
        // No count received. Try requesting it again
        gw.request(CHILD_ID, V_VAR1);
        lastSend=now;
      }
      
      if (SLEEP_MODE) {
        gw.sleep(SEND_FREQUENCY);
      }
    }
    
    void incomingMessage(const MyMessage &message) {
      if (message.type==V_VAR1) {  
        pulseCount = oldPulseCount = message.getLong();
        Serial.print("Received last pulse count from gw:");
        Serial.println(pulseCount);
        pcReceived = true;
      }
    }
    
    void onPulse()     
    { 
      if (!SLEEP_MODE) {
        unsigned long newBlink = micros();  
        unsigned long interval = newBlink-lastBlink;
        if (interval<10000L) { // Sometimes we get interrupt on RISING
          return;
        }
        watt = (3600000000.0 /interval) / ppwh;
        lastBlink = newBlink;
      } 
      pulseCount++;
    }
    
    
    


  • I found a post at the domoticz forum where the same problem was described. He managed to solve it by doing this:

    "To have my software send something I removed those parts which check for sending frequency and also identity of values.
    I now send whenever a pulse occurs (which is every 20 to 120 seconds, depending). My network is rather small so far and
    my energy meter is using a power adapter so that should be no problem. How often do others update their Watt values?"
    
    

    But what parts do I need to delete? I tried to remove most stuff regarding to frequenzy but could not get it to complie after my tests.

    When running the "stock" sketch from mysensors.org I get this in my domotic log:

    2015-10-07 20:47:26.030 Hardware Monitor: Fetching data (System sensors)
    2015-10-07 20:47:56.166 Hardware Monitor: Fetching data (System sensors)
    2015-10-07 20:48:26.302 Hardware Monitor: Fetching data (System sensors)
    2015-10-07 20:48:56.437 Hardware Monitor: Fetching data (System sensors)
    2015-10-07 20:49:26.571 Hardware Monitor: Fetching data (System sensors)
    2015-10-07 20:49:48.781 MySensors: Node: 7, Sketch Name: Energy Meter
    2015-10-07 20:49:48.825 MySensors: Node: 7, Sketch Name: Energy Meter
    2015-10-07 20:49:48.870 MySensors: Node: 7, Sketch Name: Energy Meter
    2015-10-07 20:49:48.919 MySensors: Node: 7, Sketch Version: 1.0
    2015-10-07 20:49:48.963 MySensors: Node: 7, Sketch Version: 1.0
    2015-10-07 20:49:49.007 MySensors: Node: 7, Sketch Version: 1.0
    2015-10-07 20:49:56.783 Hardware Monitor: Fetching data (System sensors)
    2015-10-07 20:50:26.917 Hardware Monitor: Fetching data (System sensors)
    

    It looks a little bit weird that it presents itself three times in a row.



  • Sorry for spamming but I solved the problem. The Original sketch was fine. I removed the radio and resoldered it (RFM69W) And then everything was Ok. There must have been some bad connecton as the sketch sent 3x greeting message.


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