SCT-013-030 current monitor sensor



  • Ahhh ! Ok.
    That why there is A3 and A0 in use !

    I'll digg into the voltage input to know how it's working.
    Thank you.



  • I've change the code to only use A0 for CT sensor.
    It's not plug in the cable, it's for testing.
    Here is the output in arduino serial console :

    sensor started, id 2
    send: 2-2-0-0 s=255,c=0,t=17,pt=0,l=5,st=ok:1.4.1
    send: 2-2-0-0 s=255,c=3,t=6,pt=1,l=1,st=ok:0
    read: 2-1-0 s=255,c=3,t=6,pt=1,l=1:0
    read: 2-1-0 s=255,c=3,t=6,pt=1,l=1:0
    read: 0-0-2 s=255,c=3,t=6,pt=0,l=1:M
    send: 2-2-0-0 s=255,c=3,t=11,pt=0,l=12,st=ok:Energy Meter
    send: 2-2-0-0 s=255,c=3,t=12,pt=0,l=3,st=ok:2.0
    send: 2-2-0-0 s=0,c=0,t=13,pt=0,l=5,st=ok:1.4.1
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 69.60 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 62.07 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 55.65 nan 
    0.00 0.00 0.00 48.57 nan 
    0.00 0.00 0.00 40.78 nan 
    0.00 0.00 0.00 35.21 nan 
    0.00 0.00 0.00 30.80 nan 
    0.00 0.00 0.00 24.84 nan 
    0.00 0.00 0.00 19.95 nan 
    0.00 0.00 0.00 16.46 nan 
    send: 2-2-0-0 s=0,c=1,t=24,pt=7,l=5,st=ok:0.0
    send: 2-2-0-0 s=0,c=1,t=25,pt=7,l=5,st=ok:0.0
    send: 2-2-0-0 s=0,c=1,t=26,pt=7,l=5,st=ok:NAN
    send: 2-2-0-0 s=0,c=1,t=27,pt=7,l=5,st=fail:0.0
    send: 2-2-0-0 s=0,c=1,t=28,pt=7,l=5,st=fail:16.5
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 13.53 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 11.34 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 9.73 nan 
    0.00 0.00 0.00 8.11 nan 
    0.00 0.00 0.00 6.84 nan 
    0.00 0.00 0.00 5.72 nan 
    0.00 0.00 0.00 4.71 nan 
    0.00 0.00 0.00 3.90 nan 
    0.00 0.00 0.00 3.18 nan 
    0.00 0.00 0.00 2.61 nan 
    send: 2-2-0-0 s=0,c=1,t=24,pt=7,l=5,st=ok:0.0
    send: 2-2-0-0 s=0,c=1,t=25,pt=7,l=5,st=ok:0.0
    send: 2-2-0-0 s=0,c=1,t=26,pt=7,l=5,st=ok:NAN
    send: 2-2-0-0 s=0,c=1,t=27,pt=7,l=5,st=fail:0.0
    send: 2-2-0-0 s=0,c=1,t=28,pt=7,l=5,st=fail:2.6
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 2.22 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 1.97 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 1.76 nan 
    0.00 0.00 0.00 1.62 nan 
    0.00 0.00 0.00 1.51 nan 
    0.00 0.00 0.00 1.40 nan 
    0.00 0.00 0.00 1.26 nan 
    0.00 0.00 0.00 1.13 nan 
    0.00 0.00 0.00 0.99 nan 
    0.00 0.00 0.00 0.85 nan 
    send: 2-2-0-0 s=0,c=1,t=24,pt=7,l=5,st=ok:0.0
    send: 2-2-0-0 s=0,c=1,t=25,pt=7,l=5,st=ok:0.0
    send: 2-2-0-0 s=0,c=1,t=26,pt=7,l=5,st=ok:NAN
    send: 2-2-0-0 s=0,c=1,t=27,pt=7,l=5,st=fail:0.0
    send: 2-2-0-0 s=0,c=1,t=28,pt=7,l=5,st=fail:0.8
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 0.74 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 0.65 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 0.57 nan 
    0.00 0.00 0.00 0.50 nan 
    0.00 0.00 0.00 0.40 nan 
    0.00 0.00 0.00 0.33 nan 
    0.00 0.00 0.00 0.29 nan 
    0.00 0.00 0.00 0.25 nan 
    0.00 0.00 0.00 0.23 nan 
    0.00 0.00 0.00 0.20 nan 
    send: 2-2-0-0 s=0,c=1,t=24,pt=7,l=5,st=ok:0.0
    send: 2-2-0-0 s=0,c=1,t=25,pt=7,l=5,st=ok:0.0
    send: 2-2-0-0 s=0,c=1,t=26,pt=7,l=5,st=ok:NAN
    send: 2-2-0-0 s=0,c=1,t=27,pt=7,l=5,st=fail:0.0
    send: 2-2-0-0 s=0,c=1,t=28,pt=7,l=5,st=fail:0.2
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 0.19 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 0.16 nan 
    read: 2-1-0 s=0,c=0,t=13,pt=0,l=5:1.4.1
    0.00 0.00 0.00 0.13 nan 
    0.00 0.00 0.00 0.14 nan 
    0.00 0.00 0.00 0.14 nan 
    0.00 0.00 0.00 0.11 nan 
    0.00 0.00 0.00 0.11 nan 
    0.00 0.00 0.00 0.09 nan 
    

    There are some fail, is it normal ?
    Thanks



  • I starting to understand.
    The SCT-013-030 is used only to get Ampere, nothing more ? Is it correct ?
    If I want the Watt I need more sensors connected to the arduino, right ?


  • Hero Member

    @chatainsim, if you know the Voltage, just multiply the voltage by the amperage and you will have the wattage...

    http://en.wikipedia.org/wiki/Ohm's_law



  • In Emonlib you have example to measure watt etc. without measure voltage.
    https://github.com/openenergymonitor/EmonLib



  • @rvendrame Thanks, I will try this.
    @maglo18 I will try to use some example.
    First I need to check if my sketch and my assemble works at least.

    Thanks for your help. I think I will need more from you guys !



  • Hello guys,

    I've working on my sensor.
    It's seems working, but I have some trouble with Watt or Kwh.

    Here is the sketch:

    // EmonLibrary examples openenergymonitor.org, Licence GNU GPL V3  ***/
    #include <SPI.h>
    #include <MySensor.h>  
    #include "EmonLib.h"             // Include Emon Library
    EnergyMonitor emon1;             // Create an instance
    #define CHILD_ID 0 
    MySensor gw;
    unsigned long lastSend;
    unsigned long SEND_FREQUENCY = 20000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
    
    MyMessage IrmsMsg(CHILD_ID,V_WATT);
    void setup()
    {  
      gw.begin();
    
      // 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);
      emon1.current(A0, 29.0);       // Current: input pin, calibration.
    }
    
    void loop()
    {
      gw.process();
      unsigned long now = millis();
      double Irms = emon1.calcIrms(1480);
      //emon1.calcVI(20,2000);         // Calculate all. No.of half wavelengths (crossings), time-out
      //emon1.serialprint();           // Print out all variables (realpower, apparent power, Vrms, Irms, power factor)
      bool sendTime = now - lastSend > SEND_FREQUENCY;
      if (sendTime) { 
        //float Irms = emon1.Irms;             //extract Irms into Variable
        gw.send(IrmsMsg.set(Irms*232.0,1));
        Serial.println(Irms*232.0);
        lastSend = now;
      }
    }
    

    I've got around 390 for the Irms*232, do you thinks it's a correct value ?
    Can I calculated the current kwh with the ampere ?

    Thank you.



  • Hello,

    I've made some change in the code :

    // EmonLibrary examples openenergymonitor.org, Licence GNU GPL V3  ***/
    #include <SPI.h>
    #include <MySensor.h>  
    #include "EmonLib.h"             // Include Emon Library
    EnergyMonitor emon1;             // Create an instance
    #define CHILD_ID_WATT 0
    #define CHILD_ID_KWH 1
    MySensor gw;
    unsigned long lastSend;
    unsigned long SEND_FREQUENCY = 20000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
    
    MyMessage IrmsMsg(CHILD_ID_WATT,V_WATT);
    MyMessage kWhMsg(CHILD_ID_KWH,V_KWH);
    void setup()
    {  
      gw.begin();
      gw.sendSketchInfo("Energy Meter", "1.0");  // Send the sketch version information to the gateway and Controller
      gw.present(CHILD_ID_WATT, S_POWER);  // Register this device as power sensor
      gw.present(CHILD_ID_KWH, S_POWER);
      emon1.current(A0, 29.0);       // Current: input pin, calibration.
    }
    
    void loop()
    {
      gw.process();
      unsigned long now = millis();
      //emon1.serialprint();           // Print out all variables (realpower, apparent power, Vrms, Irms, power factor)
      double Irms = emon1.calcIrms(1480);
      bool sendTime = now - lastSend > SEND_FREQUENCY;
      if (sendTime) {
        gw.send(IrmsMsg.set((Irms*232.0)*1000, 1));
    //    Serial.print("Watt: ");
    //    Serial.println(Irms*232.0);
        gw.send(kWhMsg.set((Irms*232.0)/1000, 1));
    //    Serial.print("kWH: ");
    //    Serial.println((Irms*232.0)/1000);
        lastSend = now;
      }
    }
    

    But in Domoticz, I've two line for this but in kWh and not on in kWh and other in Watt :
    Capture.PNG

    Do you know why ?

    Regards,


  • Hero Member

    @chatainsim Domoticz does not have a different device for power (Watt) and energy(kWh) but combines them in a single device. What you need to do is send both the power and energy to the same child.



  • Thanks, but I've already test this and only the kWh is updated in domoticz, not watt.

    // EmonLibrary examples openenergymonitor.org, Licence GNU GPL V3  ***/
    #include <SPI.h>
    #include <MySensor.h>  
    #include "EmonLib.h"             // Include Emon Library
    EnergyMonitor emon1;             // Create an instance
    #define CHILD_ID 0
    MySensor gw;
    unsigned long lastSend;
    unsigned long SEND_FREQUENCY = 20000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
    
    MyMessage IrmsMsg(CHILD_ID,V_WATT);
    MyMessage kWhMsg(CHILD_ID,V_KWH);
    void setup()
    {  
      gw.begin();
      gw.sendSketchInfo("Energy Meter", "1.0");  // Send the sketch version information to the gateway and Controller
      gw.present(CHILD_ID, S_POWER);  // Register this device as power sensor
      emon1.current(A0, 29.0);       // Current: input pin, calibration.
    }
    
    void loop()
    {
      gw.process();
      unsigned long now = millis();
      //emon1.serialprint();           // Print out all variables (realpower, apparent power, Vrms, Irms, power factor)
      double Irms = emon1.calcIrms(1480);
      bool sendTime = now - lastSend > SEND_FREQUENCY;
      if (sendTime) {
        gw.send(IrmsMsg.set((Irms*232.0)*1000, 1));
    //    Serial.print("Watt: ");
    //    Serial.println(Irms*232.0);
        gw.send(kWhMsg.set((Irms*232.0)/1000, 1));
    //    Serial.print("kWH: ");
    //    Serial.println((Irms*232.0)/1000);
        lastSend = now;
      }
    }
    

    Can you help me with this ?

    Thanks


  • Hero Member

    @chatainsim I am pretty sure it is a combined device which shows Watt only when added ...:
    upload-40825a2f-8628-4412-8fdb-44b222576843

    upload-11b440e7-718e-46ae-87f1-a4eb3c913c7e

    upload-408228f1-e921-418e-bae9-db19b6d47eee

    Although I am not sure if the Domoticz MySensors plug-in handles it right (I'm still using my own script).



  • Ok, thanks.
    How do you get your watt info ? With teleinfo ?


  • Hero Member

    @chatainsim
    I send the V_Watt messages from the Power meter to Domoticz.



  • @AWI

    MyMessage IrmsMsg(CHILD_ID,V_WATT);
    MyMessage kWhMsg(CHILD_ID,V_KWH);

    I also send both data but it's seems that Domoticz is ingnoring it !
    I don't know why.


  • Hero Member

    @chatainsim Sounds you like you need to consult the Domoticz forum. The Domoticz code shows that is interpreted.

    case V_WATT:
    		{
    			_tMySensorSensor *pSensorKwh = FindSensor(pSensor->nodeID, V_KWH);
    			if (pSensorKwh) {
    				SendKwhMeter(pSensorKwh->nodeID, pSensorKwh->childID, pSensorKwh->batValue, pSensor->floatValue / 1000.0f, pSensorKwh->floatValue, "Meter");
    			}
    			else {
    				_tUsageMeter umeter;
    				umeter.id1 = 0;
    				umeter.id2 = 0;
    				umeter.id3 = 0;
    				umeter.id4 = pSensor->nodeID;
    				umeter.dunit = pSensor->childID;
    				umeter.fusage = pSensor->floatValue/1000.0f;
    				sDecodeRXMessage(this, (const unsigned char *)&umeter);
    			}
    		}
    		break;
    	case V_KWH:
    		{
    			_tMySensorSensor *pSensorWatt = FindSensor(pSensor->nodeID, V_WATT);
    			if (pSensorWatt) {
    				SendKwhMeter(pSensor->nodeID, pSensor->childID, pSensor->batValue, pSensorWatt->floatValue / 1000.0f, pSensor->floatValue, "Meter");
    			}
    			else {
    				SendKwhMeter(pSensor->nodeID, pSensor->childID, pSensor->batValue, 0, pSensor->floatValue, "Meter");
    			}
    		}
    		break;```


  • Does anyone have some OpenHab items and rules for @chatainsim sketch posted above? I have a SCT-013-000 can anyone help me use it in my project?
    Thanks!



  • Hello, anybody can help me here?
    What I want to do is to get the instant watt or kW read from my SCT013000 and to get also the kWh from a certain date, let's say fro first of this month!
    Any idea will be kindly appreciated!
    I'm using openhanb to display info and I'll need some rules for this!
    Thanks all!



  • Nobody here?



  • I have got this to work on my Cdn system 120/240 vac using A0 and A1 pins. The code needed to be changed to address our voltage and another clamp added., but I do have a few questions;

    1. Is there a way I can record or view amps consumed in the vera dashboard?

    2. I used the sketch above displayed by @chatainsim and in it there are two lines of code with values 29.0 and second 1480 both in green and in brackets. For the life of me I can not find an explanation of these or how the values were arrived at. Can anyone help with explanation?

         gw.present(CHILD_ID, S_POWER);
         emon1.current(A0, 29.0);       // Current: input pin, calibration.
         }
    
         void loop()
        {
        gw.process();
        unsigned long now = millis();
        double Irms = emon1.calcIrms(1480);
    
    1. Is there a method to show current in phase. I tried presenting CHILD_ID, S_MULTIMETER and MyMessage IrmsMsg(CHILD_ID,V_CURRENT); but got nowhere.

    2. There is/was much running up and down stairs from electrical panel to computer and back is OTA IDE what I think it might be-- firmware or sketches can be updated over the air from my computer>vera>gw>node while not needing to access the node? If so there is much learning for me to do.

    3. Using arduino 1.6.5, Lib 1.4.1, vera 3/veralite, ui5, Ethernet g/w , win 8.1, pro mini clone



  • Hello, last week i buy SCT013-30 (ebay.fr) and follow this topic for have powermeter with mysensors. I need only energy (kWh) and power (W) same my OWL sensors (use with domoticz controler)
    I modifie the sketch from mysensors/pulse powermeter (http://www.mysensors.org/build/pulse_power)

    // EmonLibrary examples openenergymonitor.org, Licence GNU GPL V3  ***/
    #include <SPI.h>
    #include <MySensor.h>  
    #include "EmonLib.h"             // Include Emon Library
    EnergyMonitor emon1;             // Create an instance
    #define CHILD_ID 0 
    #define PIN_ANALOG_I A2
    MySensor gw;
    unsigned long lastSend;
    unsigned long lastSend2;
    unsigned long SEND_FREQUENCY = 90000; // Minimum time between send (in milliseconds).
    unsigned long SEND_FREQUENCY2 = SEND_FREQUENCY / 25;
    int index = 0;
    double Irms=0;
    double power;
    boolean pcReceived = false;
    double nrj=0, old_nrj;
    MyMessage IrmsMsg(CHILD_ID,V_WATT);
    MyMessage kWhMsg(CHILD_ID,V_KWH);
    MyMessage pcMsg(CHILD_ID,V_VAR1);
    
    
    void incomingMessage(const MyMessage &message) 
    {
      if (message.type==V_VAR1) 
      {  
        nrj = old_nrj = message.getLong();
        Serial.print("Received last nrj count from gw:");
        Serial.println(nrj);
        pcReceived = true;
      }
    }
    
    void setup()
    {  
      gw.begin(incomingMessage);
      gw.sendSketchInfo("Energy Meter", "1.0");  // Send the sketch version information to the gateway and Controller
      gw.present(CHILD_ID, S_POWER);   // Register this device as power sensor
      gw.request(CHILD_ID, V_VAR1);
      emon1.current(PIN_ANALOG_I, 30.0);       // Current: input pin, calibration.
    }
    
    void loop()
    {
      gw.process(); 
      unsigned long now = millis();
      unsigned long now2 = millis();
      bool sendTime2 = now2 - lastSend2 > SEND_FREQUENCY2;
      if (sendTime2) //calcul Irms moy
      {
        if (index==0) Irms=emon1.calcIrms(1480);
        else {
        index++;
        Irms = (index*Irms+emon1.calcIrms(1480))/(index+1);
        }
        lastSend2 = now2;
      }
      bool sendTime = now - lastSend > SEND_FREQUENCY;
      if (sendTime && pcReceived) 
      { 
        power = Irms*232.0;
        gw.send(IrmsMsg.set(power,1));
        Serial.println(Irms*232.0);
        nrj += (power*SEND_FREQUENCY/1000)/3.6E6;
        gw.send(kWhMsg.set(nrj,3));
        lastSend = now;
        index = 0;
        old_nrj=nrj;
      }
     else if (sendTime && !pcReceived)
     {
      gw.request(CHILD_ID, V_VAR1);
      lastSend=now;
     }
    }
    

    it seems that it works for now (but not optimal).
    0_1456322448197_upload-3801900a-dd69-437d-ac99-6f2baa635713

    Note 1) my cosphy=1 because i use only ampere clamp, i cant measure the phase between curent i and tension v.
    2) my calibration constant (used in emonlib) is 30

    1. Sorry for my english :disappointed: - Je suis fran├žais.

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