SCT-013-030 current monitor sensor

[A Former User]

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).

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
3) Sorry for my english :disappointed: - Je suis français.

[oudini]

Hello,
The cos phi applies only to the three-phase, single phase not

Je suis français aussi...

[fredok]

Hello, if i remember physics course in university Power P=u.i and energy E=integrale(Pdt)=integrale(u.i.dt)=UeffxIeffxcos(phi)
but for particular citizen same me, energy provider non consider cos(phi)

So, i correct my last sketch for request last nrj value to the gw.

// 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 = 20000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
unsigned long SEND_FREQUENCY2 = SEND_FREQUENCY / 25;
int index = 0;
double Irms=0;
double power;
boolean pcReceived = false;
boolean onyva=true;
float 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.getFloat();
    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()
{
  if (onyva) gw.process();
  onyva = false; 
  unsigned long now = millis();
  //unsigned long now2 = millis();
  bool sendTime2 = now - 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 = now;
  }
  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,5));
    gw.send(pcMsg.set(nrj,5));
    lastSend = now;
    index = 0;
    old_nrj=nrj;
    onyva=true;
  }
 else if (sendTime && !pcReceived)
 {
  gw.request(CHILD_ID, V_VAR1);
  lastSend=now;
  index=0;
  onyva=true;
 }
}

thx...

[maciejka]

Hi, I'm beginner of arduino programmer. Can You explain a little this sketch? What for You use "SEND_FREQUENCY2 = SEND_FREQUENCY / 25;" ? Why You using two if statements sendTime2 and sendTime ?

Thanks
Maciej

[fredok]

Sorry, I'm late debause i come back holiday today
This sketch send Power and energy (kWh) every Sendfrequency=90s but the sketch not measure power every 90s but everyre 90/25=3,6s and send to the GW the mean power (Pmean)
this is calculate here :
if (index==0) Irms=emon1.calcIrms(1480);
else {
index++;
Irms = (index*Irms+emon1.calcIrms(1480))/(index+1);
}
lastSend2 = now;

[chatainsim]

Thanks @fredok I will give a try !

And I'm french too ;)

[chatainsim]

Hi @fredok
Your sketch working fine.
Except in domoticz only the kWh is updated. Watt is not.
Do you have a clue about that ?

[fredok]

Hello chatainsim, in my domoticz i have only one device counting (kWh+instant Power)

The instant power updated every 90s is writing in Watt value(83.3) , the kWh of the day (1.174) and total energy (61.582 kWh).... the device log show the power = f(t).
Look if Watt value in (kWhMeter) device change, look the log graph ... if is ok, u not need Wattmeter device.
Thx Fredok

[chatainsim]

@fredok Yes, the kWhMeter is working fine:

[chatainsim]

Ok, so it just stop working after almost 24 hours ...
I have some issue with mysensors, I don't know why, sometimes sensors stop working but I don't know why ...

send: 10-10-2-0 s=255,c=3,t=15,pt=2,l=2,sg=0,st=ok:0
send: 10-10-2-0 s=255,c=0,t=17,pt=0,l=5,sg=0,st=ok:1.5.4
send: 10-10-2-0 s=255,c=3,t=6,pt=1,l=1,sg=0,st=ok:2
sensor started, id=10, parent=2, distance=2
send: 10-10-2-0 s=255,c=3,t=11,pt=0,l=12,sg=0,st=ok:Energy Meter
send: 10-10-2-0 s=255,c=3,t=12,pt=0,l=3,sg=0,st=fail:1.0
send: 10-10-2-0 s=0,c=0,t=13,pt=0,l=0,sg=0,st=ok:
send: 10-10-2-0 s=0,c=2,t=24,pt=0,l=0,sg=0,st=fail:
send: 10-10-2-0 s=0,c=2,t=24,pt=0,l=0,sg=0,st=ok:
send: 10-10-2-0 s=0,c=2,t=24,pt=0,l=0,sg=0,st=ok:

[fredok]

hummm. i use this sketch with arduino mini near the GW (approx 5m max / 1 Wall) and i not see disconnection. So i cant help u.

[chatainsim]

This is a recurring problem I have with MySensors.
All my sensors stop working, I have to clear the eprom then reupload the sketch.
Now It's working fine, until it fail again ;)

[qqlapraline]

Hello All,

I have tried this code and it works fine.
I was questionning myself though. If the index request fails at some point, what would be the behaviour of the code ? From my understanding of it, it will try to get the index again and again until it succeeds. May be a another way would be not to reset the index to 0 and send the additionnal index the next time.
What do you think ?

QQ.

[fredok]

Hello, sorry for my late reply.
About the sketch,

1. At the beginning, the sketch request the last kWh to the GW (I use Domoticz, so GW ask Domoticz the last kWh value) and send to the node.
2. If node receiv, the variable pcreceiv=true and it working fine else node wait for the request until he receiv. A serial.print will inform if receiv.

Fredok

[qqlapraline]

Yep, got that lately :)
Thanks.

QQ.

[warmaniac]

@fredok

hi , do you have please updated sketch for newest version of domoticz ? This old cause problems when I compiling it.

Thanks :+1:

[gohan]

@warmaniac look here
https://forum.mysensors.org/topic/4276/converting-a-sketch-from-1-5-x-to-2-0-x

[fredok]

@warmaniac
Sorry i not update this sketch ...

[warmaniac]

@gohan

tried to modify but I always get error

/MySensors.h:328:2: error: #error No forward link or gateway feature activated. This means nowhere to send messages! Pretty pointless.

#error No forward link or gateway feature activated. This means nowhere to send messages! Pretty pointless.

// EmonLibrary examples openenergymonitor.org, Licence GNU GPL V3  ***/
#include <SPI.h>
#include <MySensors.h>  
#include "EmonLib.h"             // Include Emon Library
EnergyMonitor emon1;             // Create an instance
#define CHILD_ID 0 
#define MY_RADIO_NRF24
#define PIN_ANALOG_I A1

//MySensor gw;
unsigned long lastSend;
unsigned long lastSend2;
unsigned long SEND_FREQUENCY = 20000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
unsigned long SEND_FREQUENCY2 = SEND_FREQUENCY / 25;
int index = 0;
double Irms=0;
double power;
boolean pcReceived = false;
boolean onyva=true;
float 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) 

void receive(const MyMessage &message) 
{
  if (message.type==V_VAR1) 
  {  
    nrj = old_nrj = message.getFloat();
    Serial.print("Received last nrj count from gw:");
    Serial.println(nrj);
    pcReceived = true;
  }
}

void presentation () { 
  
  sendSketchInfo("Energy Meter", "1.0");  // Send the sketch version information to the gateway and Controller
  present(CHILD_ID, S_POWER);   // Register this device as power sensor
  request(CHILD_ID, V_VAR1);
 
  }

void setup()
{  
  begin(incomingMessage);
  emon1.current(PIN_ANALOG_I, 30.0);       // Current: input pin, calibration.
}

void loop()
{
  if (onyva) process();
  onyva = false; 
  unsigned long now = millis();
  //unsigned long now2 = millis();
  bool sendTime2 = now - 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 = now;
  }
  bool sendTime = now - lastSend > SEND_FREQUENCY;
  if (sendTime && pcReceived) 
  { 
    power = Irms*232.0;
    send(IrmsMsg.set(power,1));
    Serial.println(Irms*232.0);
    nrj += (power*SEND_FREQUENCY/1000)/3.6E6;
    send(kWhMsg.set(nrj,5));
    send(pcMsg.set(nrj,5));
    lastSend = now;
    index = 0;
    old_nrj=nrj;
    onyva=true;
  }
 else if (sendTime && !pcReceived)
 {
  request(CHILD_ID, V_VAR1);
  lastSend=now;
  index=0;
  onyva=true;
 }
}

It is possible to compile it with old mysensors library ? It will work with gateway which has a newest version ?

[fredok]

Hello, at the end i write a v2.0 of the sketch

//#include <Arduino.h>
#define MY_DEBUG
#define MY_RADIO_NRF24
// EmonLibrary examples openenergymonitor.org, Licence GNU GPL V3  ***/
#include <SPI.h>
#include <MySensors.h>
#include <DallasTemperature.h>
#include <OneWire.h>
#include "EmonLib.h"             // Include Emon Library
EnergyMonitor emon1;             // Create an instance
EnergyMonitor emon2;

#define CHILD_ID_CLAMP1 0
#define CHILD_ID_CLAMP2 1
#define CHILD_ID_TEMP 2
#define CHILD_ID_LDR 3

#define PIN_ANALOG_I1 A2 //pince amperemetrique1
#define PIN_ANALOG_I2 A3
#define PIN_LDR A0 // LDR
#define PIN_DALLAS 3

//Definition de dallas
#define MAX_ATTACHED_DS18B20 1
#define COMPARE_TEMP 1 // Send temperature only if changed? 1 = Yes 0 = No
OneWire oneWire(PIN_DALLAS);
DallasTemperature sensors(&oneWire);
float lastTemperature[MAX_ATTACHED_DS18B20];
int numSensors = 1;
bool receivedConfig = false;
bool metric = true; //truc v2.0

//int compat = 0;
unsigned long lastSend_temp = millis();
unsigned long lastSend_power = millis();
unsigned long lastSend_c;
unsigned long SEND_FREQUENCY = 120000; // Minimum time between send (in milliseconds). We don't wnat to spam the gateway.
unsigned long SEND_FREQUENCY_TEMP = 300000; //delais d'emission entre 2 mesures de temps
unsigned long SEND_FREQUENCY_C = SEND_FREQUENCY / 30;
int index = 0;
double Irms1 = 0;
double Irms2 = 0;
boolean pcReceived1 = false;
boolean pcReceived2 = false;
boolean first_time_temp = HIGH;

float nrj1 = 0, old_nrj1;
float nrj2 = 0, old_nrj2;
int ldr = 0, old_ldr;

MyMessage IrmsMsg1(CHILD_ID_CLAMP1, V_WATT);
MyMessage kWhMsg1(CHILD_ID_CLAMP1, V_KWH);
MyMessage pcMsg1(CHILD_ID_CLAMP1, V_VAR1);
MyMessage IrmsMsg2(CHILD_ID_CLAMP2, V_WATT);
MyMessage kWhMsg2(CHILD_ID_CLAMP2, V_KWH);
MyMessage pcMsg2(CHILD_ID_CLAMP2, V_VAR2);
MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP);
MyMessage msgLight(CHILD_ID_LDR, V_LIGHT_LEVEL);

void before() {
  sensors.begin();
}


void presentation()
{

  sendSketchInfo("Multisensors_Entree", "2.0");  // Send the sketch version information to the gateway and Controller
  present(CHILD_ID_CLAMP1, S_POWER);   // Register this device as power sensor
  request(CHILD_ID_CLAMP1, V_VAR1);
  present(CHILD_ID_CLAMP2, S_POWER);   // Register this device as power sensor
  request(CHILD_ID_CLAMP2, V_VAR2);
  numSensors = sensors.getDeviceCount(); //compte le nb de ds18
  present(CHILD_ID_TEMP, S_TEMP);
  present(CHILD_ID_LDR, S_LIGHT_LEVEL);
}


void receive(const MyMessage &message)
{
  if (message.type == V_VAR1)
  {
    nrj1 = old_nrj1 = message.getFloat();
    Serial.print("Received last nrj count from gw:");
    Serial.println(nrj1);
    pcReceived1 = true;
  }

  if (message.type == V_VAR2)
  {
    nrj2 = old_nrj2 = message.getFloat();
    Serial.print("Received last nrj count from gw:");
    Serial.println(nrj2);
    pcReceived2 = true;
  }

}

void setup()
{
  sensors.setWaitForConversion(false);
  emon1.current(PIN_ANALOG_I1, 30.0);       // Current: input pin, calibration.
  emon2.current(PIN_ANALOG_I2, 30.0);
  Serial.println("SETUP completed");
}

void envoi_donnees(double intrms, int id_clamp)
{
  Serial.print("Envoi des donnees .... clamp="); Serial.println(id_clamp);
  double energie = (intrms * 232.0 * SEND_FREQUENCY / 1000) / 3.6E6;
  switch (id_clamp)
  {
    case 1:
      {
        send(IrmsMsg1.set(intrms * 232.0, 1));
        nrj1 += energie;
        send(kWhMsg1.set(nrj1, 5));
        send(pcMsg1.set(nrj1, 5));
        old_nrj1 = nrj1;
      }
      break;
    case 2:
      {
        send(IrmsMsg2.set(intrms * 232.0, 1));
        nrj2 += energie;
        send(kWhMsg2.set(nrj2, 5));
        send(pcMsg2.set(nrj2, 5));
        old_nrj2 = nrj2;
      }
      break;
  }
}

void loop() {
  unsigned long now = millis();
  bool sendTime_c = now - lastSend_c > SEND_FREQUENCY_C;
  // Calcul de Irms1 et Irms2
  if (sendTime_c) //calcul Irms moy clamp1/clamp2
  {
    if (index == 0)
    {
      Irms1 = emon1.calcIrms(1480);
      Irms2 = emon2.calcIrms(1480);
    }
    else  
    {
      Irms1 = (index * Irms1 + emon1.calcIrms(1480)) / (index + 1);
      Irms2 = (index * Irms2 + emon2.calcIrms(1480)) / (index + 1);
    }
    lastSend_c = now;
    index++;
  }

  bool sendTime_temp = now - lastSend_temp > SEND_FREQUENCY_TEMP;
  if (sendTime_temp || first_time_temp)
  {
    Serial.println("........ quoiqu'il arrive, on envoi la temp+ldr");
    first_time_temp = LOW;
    //Send Temp
    // Envoi Température d'après https://github.com/mysensors/MySensorsArduinoExamples/blob/master/examples/DallasTemperatureSensor/DallasTemperatureSensor.ino
    sensors.requestTemperatures();
    sleep(750);
    for (int i = 0; i < numSensors && i < MAX_ATTACHED_DS18B20; i++)
      {
     // float temperature = static_cast<float>(static_cast<int>((getConfig().isMetric ? sensors.getTempCByIndex(i) : sensors.getTempFByIndex(i)) * 10.)) / 10.;
      float temperature = static_cast<float>(static_cast<int>((getControllerConfig().isMetric?sensors.getTempCByIndex(i):sensors.getTempFByIndex(i)) * 10.)) / 10.;
      if (lastTemperature[i] != temperature && temperature != -127.00 && temperature != 85.00)
      {

        // Send in the new temperature
        send(msgTemp.setSensor(i).set(temperature, 1));
        Serial.println(".....................Envoi Temp");
        // Save new temperatures for next compare
        lastTemperature[i] = temperature;
      }
    }
 
  //Send light LDR
  //Envoi Light LDR
  ldr = (1023 - analogRead(PIN_LDR)) / 10.23;
  if (old_ldr != ldr)
  {
    send(msgLight.set(ldr));
    old_ldr = ldr;
  }
   lastSend_temp=now;
  }



 bool sendTime_power = now - lastSend_power > SEND_FREQUENCY;

 if (sendTime_power)
{

  // Envoi ou request Puissance1
  if (pcReceived1) envoi_donnees(Irms1, 1);
  else     {
    request(CHILD_ID_CLAMP1, V_VAR1);
    Serial.println("Request VAR1");
  }


  // Envoi ou request Puissance2
  if (pcReceived2) envoi_donnees(Irms2, 2);
  else     {
    request(CHILD_ID_CLAMP2, V_VAR2);
    Serial.println("Request VAR2");
  }
  //on reinitialise les compteurs
  lastSend_power = now;
  index = 0;
  }
}

attention, i use in the same node a ds18b20 for temp and LRD for light measurment
so u need to delete part of sketch.
i just compiling/Verifying this with mysensors v2.1 (but not loaded in arduino pro) and no error
for emonlib => https://github.com/openenergymonitor/EmonLib