Energy Meter - not sending at expected

flopp

I don't know if I don't understand the way it should work or maybe my Nano have wrong MHz.

This is my code


#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 10000 // 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 15000 // 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 = 5*60000; // 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++;
}

My VAR1 value is 1845100000

I except it to report every 20 second but it can be 2 minutes or 20 seconds and right now it was 15 minutes ago.

Am I right if the Watt needs to be change otherwise it will not send Watt update?
Same for kWh, also need to change before updating.

This Meter is for my heating system and right now it is not working so much.

I also have a second Nano measuring my whole house, that one is sending every 5 minutes as I expect. But there will almost never be same Watt and kWh is changing much quicker.

mfalkvidd

@flopp could you post serial output from the node, including the startup phase after a reset?

flopp

@mfalkvidd

1.5.1

send: 17-17-0-0 s=255,c=0,t=17,pt=0,l=5,sg=0,st=ok:1.5.1
send: 17-17-0-0 s=255,c=3,t=6,pt=1,l=1,sg=0,st=ok:0
read: 0-0-17 s=255,c=3,t=6,pt=0,l=1,sg=0:M
sensor started, id=17, parent=0, distance=1
send: 17-17-0-0 s=255,c=3,t=11,pt=0,l=12,sg=0,st=ok:Energy Meter
send: 17-17-0-0 s=255,c=3,t=12,pt=0,l=3,sg=0,st=ok:1.0
send: 17-17-0-0 s=1,c=0,t=13,pt=0,l=0,sg=0,st=ok:
send: 17-17-0-0 s=1,c=2,t=24,pt=0,l=0,sg=0,st=ok:
read: 0-0-17 s=1,c=2,t=24,pt=0,l=10,sg=0:1845100810
Received last pulse count from gw:1845100810
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:64
Watt:64
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100814
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:184510.0800
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:63
Watt:63
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100817
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:64
Watt:64
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100821
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100824
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100828
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100831
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100835
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100839
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:63
Watt:63
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100842
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:64
Watt:64
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:1845100846
read: 0-0-17 s=1,c=2,t=24,pt=0,l=10,sg=0:1845100810
Received last pulse count from gw:1845100810
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=fail:1845100813
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=fail:1845100817
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=fail:1845100820
read: 0-0-17 s=1,c=2,t=24,pt=0,l=10,sg=0:1845100810
Received last pulse count from gw:1845100810
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=fail:1845100813

looks strange, why does ask for VAR1 again

Domoticz Log

2016-09-07 06:57:04.773 MySensors: Node: 17, Sketch Name: Energy Meter
2016-09-07 06:57:04.845 MySensors: Node: 17, Sketch Version: 1.0
2016-09-07 06:57:25.013 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 06:57:25.142 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 06:57:45.013 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 06:58:05.012 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 06:58:35.651 (MySensors USB) Temp (KökTbx_T)
2016-09-07 06:58:35.712 (MySensors USB) Temp (UppTbx_T)
2016-09-07 06:58:35.756 (MySensors USB) Temp (KökUt_T)
2016-09-07 06:58:35.797 (MySensors USB) Temp (ToaUt_T)
2016-09-07 06:58:35.838 (MySensors USB) Temp (EfterPump_T)
2016-09-07 06:58:35.878 (MySensors USB) Temp (HallTbx_T)
2016-09-07 06:58:35.918 (MySensors USB) Temp (UppUt_T)
2016-09-07 06:58:35.958 (MySensors USB) Temp (ToaTbx_T)
2016-09-07 06:58:35.997 (MySensors USB) Temp (Kök_T)
2016-09-07 06:58:36.036 (MySensors USB) Temp (PannaKomp_T)
2016-09-07 06:58:36.075 (MySensors USB) Temp (HallUt_T)
2016-09-07 06:58:36.115 (MySensors USB) Temp (Tvätt_T)
2016-09-07 06:58:36.154 (MySensors USB) Temp (T12_T)
2016-09-07 06:58:36.193 (MySensors USB) Temp (VMellan_T)
2016-09-07 06:58:36.233 (MySensors USB) Temp (Hallen_T)
2016-09-07 06:58:36.272 (MySensors USB) Temp (PannaEl_T)
2016-09-07 06:58:36.311 (MySensors USB) Temp (ToaNere_T)
2016-09-07 06:58:36.350 (MySensors USB) Temp (VarmVatten_T)
2016-09-07 06:58:40.106 (MySensors USB) Temp (KylUppe_T)
2016-09-07 06:58:41.190 (MySensors USB) Temp (KylMitten_T)
2016-09-07 06:58:41.230 (MySensors USB) Temp (KylNere_T)
2016-09-07 06:58:41.269 (MySensors USB) Temp (FrysUppe_T)
2016-09-07 06:58:41.309 (MySensors USB) Temp (KylBakom_T)
2016-09-07 06:58:41.387 (MySensors USB) Temp (Allrum_T)
2016-09-07 06:58:41.465 (MySensors USB) Temp (SovrumOW_T)
2016-09-07 07:00:02.496 Starting automatic database backup procedure...
2016-09-07 07:00:18.899 Ending automatic database backup procedure...
2016-09-07 07:00:05.013 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 07:00:25.014 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 07:01:01.239 (MySensors USB) General/Voltage (VinglasSkapet_V)
2016-09-07 07:01:01.353 (MySensors USB) Temp + Humidity (VinglasSkapet_T)
2016-09-07 07:01:01.428 (MySensors USB) Temp + Humidity (VinglasSkapet_T)
2016-09-07 07:01:06.073 (MySensors USB) Rain (Hyundai)
2016-09-07 07:01:08.160 (MySensors USB) Rain (Hyundai)
2016-09-07 07:01:16.177 (MySensors USB) General/kWh (MeterHuset)
2016-09-07 07:01:16.242 (MySensors USB) General/kWh (MeterHuset)
2016-09-07 07:01:59.706 (MySensors USB) General/Voltage (BadrumNere_V)
2016-09-07 07:01:59.828 (MySensors USB) Temp (Temp)
2016-09-07 07:01:59.908 (MySensors USB) Humidity (Hum)
2016-09-07 07:02:05.016 (MySensors USB) Temp (AppleTV_T)
2016-09-07 07:02:05.115 (MySensors USB) Temp (PS3_T)
2016-09-07 07:02:05.229 (MySensors USB) Temp (Stereo_T)

Yes I a lot of temp senors

flopp

after I changed pulseCount to be 100000 it looks better

serial output

send: 17-17-0-0 s=255,c=0,t=17,pt=0,l=5,sg=0,st=ok:1.5.1
send: 17-17-0-0 s=255,c=3,t=6,pt=1,l=1,sg=0,st=ok:0
read: 0-0-17 s=255,c=3,t=6,pt=0,l=1,sg=0:M
sensor started, id=17, parent=0, distance=1
send: 17-17-0-0 s=255,c=3,t=11,pt=0,l=12,sg=0,st=ok:Energy Meter
send: 17-17-0-0 s=255,c=3,t=12,pt=0,l=3,sg=0,st=ok:1.0
send: 17-17-0-0 s=1,c=0,t=13,pt=0,l=0,sg=0,st=ok:
send: 17-17-0-0 s=1,c=2,t=24,pt=0,l=0,sg=0,st=ok:
read: 0-0-17 s=1,c=2,t=24,pt=0,l=6,sg=0:100000
Received last pulse count from gw:100000
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:62
Watt:62
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100004
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0004
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100007
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0007
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:63
Watt:63
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100010
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0010
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:62
Watt:62
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100014
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0014
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100017
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0017
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100021
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0021
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:63
Watt:63
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100024
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0024
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100028
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0028
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:62
Watt:62
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100031
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0031

DZ log

2016-09-07 08:30:15.154 MySensors Node 17 Sketch Name Energy Meter
2016-09-07 08:30:15.223 MySensors Node 17 Sketch Version 1.0
2016-09-07 08:30:35.397 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:30:35.526 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:30:55.461 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:31:15.398 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:31:15.524 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:31:16.867 (MySensors USB) General/kWh (MeterHuset)
2016-09-07 08:31:16.924 (MySensors USB) General/kWh (MeterHuset)
2016-09-07 08:31:35.398 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:31:35.529 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:31:55.462 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:32:15.459 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:32:35.397 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:32:35.527 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:32:55.463 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:33:15.397 (MySensors USB) General/kWh (PannaMeter)
2016-09-07 08:33:15.530 (MySensors USB) General/kWh (PannaMeter)

flopp

after a while I got this

send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100116
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0116
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:62
Watt:62
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100119
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0119
read: 51-51-51 s=1,c=2,t=24,pt=0,l=6,sg=0:100063
ver mismatch
read: 0-0-0 s=1,c=2,t=24,pt=0,l=0,sg=0:
ver mismatch
send: 17-17-0-0 s=1,c=1,t=17,pt=5,l=4,sg=0,st=ok:63
Watt:63
send: 17-17-0-0 s=1,c=1,t=24,pt=5,l=4,sg=0,st=ok:100123
send: 17-17-0-0 s=1,c=1,t=18,pt=7,l=5,sg=0,st=ok:10.0123

what is 51-51-51 and that is also wrong VAR value

sundberg84

@flopp pulseCount/V_VAR1 and Domoticz is something else... I have not got my finger around it but what I know is that some values in the energi meter is calculacted from V_VAR1 / day. When i tested my rain sensor (tip_bucket) i pretty much have to do 1 test each day to be sure. Also there is the possibility to edit the database but as i said, im not sure.

If you had a pulsecount of 1000 and set it to 0 it would show -1000 in watts i think or something... but only calculated the pulse from that day.
Sorry, not bringing anything good to the table, just remember it was a bit hard to get my head around.

flopp

a few thing that can be my error.

I had one beginner mistake, no cap on NRF thats why it was getting Failed a few times, this happened after 0-10 minutes and during my first setup it was 5 minutes to send.
New NRF and Cap seems to solve one issue. Sorry
I noticed if the Watt is sent it will update Domoticz. If VAR is sent it will not update Domoticz. If kwh is sent it will update Domoticz.
skectch is checking if kwh was same as old, the check is only handling 2 decimals(what is can see in SerialPrint) so I needed a lot of watts to change second decimal. 1845110734 is my VAR but the IF code is only seeing 184511.07

summary

Bad NRF, it was working a few minutes. Biggest error
My watt was same, heating system and right now it doesn't heat = dont send
My kwh was increasing slowly = don't send

I think I will remove the check if value is old and send it every 5 minutes even if watt, kwh, pulsecount is same as old

flopp

@sundberg84
i also had a lot of problem with my Rain data in Domoticz.
read more here https://www.domoticz.com/forum/viewtopic.php?f=28&t=11088

if your Sensor timeout is 2 hours you need to send rain VAR within 2 hours otherwise your graph will look strange.

Yes, if you change the VAR during the day to a lower value you will get minus value. Took me a few days to understand how Domoticz DB file was working.

Keep up the good work

flopp

It was working for a few hours then not sending any data, even with my new sketch. I changed to Arduino UNO and since then it has been working perfect. So it was my NRF(maybe) and my Nano that was not working correctly.

flopp

But I found something weird about the division

Why doesn't it send the exact value?

My pulseCount is 1845124894 and it is sent to Controller correct, then it will use below function
My PULSE_FACTOR is 10000

double kwh = ((double)pulseCount/((double)PULSE_FACTOR));

and send the divided value to Controller, but it doesn't send correct value, it is missing the two last numbers "94" it is absolutely not a big problem but why send 4 decimals when the two last it always 0(zero)

Look at last row, 1845125113 = 184512.5200?

Is this because double values is rounding up? But 5113 should be 5100.

Yveaux

@flopp could be because 'double' is actually float on Arduino, and therefore precision is limited. Have to do so maths though to know for sure.

flopp

@Yveaux
OK thanks

flopp

still working with UNO.

this is the sketch i am running

#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 10000       // 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 15000          // 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 = 5*60000; // 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", "1.1");
  //1.1 no check for old value, always send
  
  // 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  
       
    // 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;
         
      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++;
}

flopp

There must be something wrong with my code. Since 1 February my Arduino is 3 kWh before the real energy value for my house.
My second Arduino is measuring kWh on my heating system and that one is running correct.
For my house I use Nano(clone) for heating system I use UNO(original)
Can the hardware be the bad guy here?
It should be same code in both Arduino but tomorrow I will use an UNO(org) for my house and wait 1 week.

Yveaux

@flopp how do you count the pulses from your meter? Could that be the issue?

flopp

@Yveaux
I don't know the name but I think it is a photo resistor, which I have connected to a LM393 then Arduino counts the interrupts.
Same hardware for both House and Heating.
Same sketch.

flopp

I changed to a UNO now my Watt is showing the same value!!
EDIT: this was because the WATT was above 15000 and then it didn't send any data to Controller. I had values up to 110000.
It must be something with the Watt calculation. Anyone seen this before?

flopp

I think I found it.

if (interval<10000L) { // Sometimes we get interrupt on RISING
      return;
    }

It seems to be that my interrupt is to quick. above code is default if I change to

if (interval<35000L) { // Sometimes we get interrupt on RISING
      return;
    }

it will calculate Watt as I think it should be.
I will let it run for a week and see if kWh is OK now.

Energy Meter - not sending at expected

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