💬 Power Meter Pulse Sensor

[gohan]

That actually is not that critical, as I am going to move to MQTT and that should be working anyway. Right now it is working on a UNO with NRF24, but my biggest issue is the WATT reading that it is missing

[gohan]

Any more suggestions on the Watt issue?

[hek]

Did you by any chance change SLEEP_MODE to true?

[gohan]

No, I get every pulse reported as soon as it is detected.

[gohan]

I think I found a problem: the WATT calculation is returning values over 172000 watts and since I put 10000 as the max value, it was not sending anything. I double checked my energy meter and indeed it is 1000 pulses per KWH and this is what I set in sketch

[gohan]

@hek I said I found the problem, I didn't say I know how to solve it 😅

[gohan]

Here is the log I get from node

7230 TSF:MSG:READ,0-0-250,s=1,c=2,t=24,pt=0,l=7,sg=0:1682675
rece

Received last pulse count from gw:1682675

11817 TSF:MSG:SEND,250-250-0-0,s=1,c=1,t=17,pt=5,l=4,sg=0,ft=0,st=OK:528
Watt:528

Watt:197065

21820 TSF:MSG:SEND,250-250-0-0,s=1,c=1,t=24,pt=5,l=4,sg=0,ft=0,st=OK:1682677
21913 TSF:MSG:SEND,250-250-0-0,s=1,c=1,t=18,pt=7,l=5,sg=0,ft=0,st=OK:1682.6770
Watt:196807

36824 TSF:MSG:SEND,250-250-0-0,s=1,c=1,t=24,pt=5,l=4,sg=0,ft=0,st=OK:1682679
36917 TSF:MSG:SEND,250-250-0-0,s=1,c=1,t=18,pt=7,l=5,sg=0,ft=0,st=OK:1682.6790
Watt:197368

51827 TSF:MSG:SEND,250-250-0-0,s=1,c=1,t=24,pt=5,l=4,sg=0,ft=0,st=OK:1682681
51920 TSF:MSG:SEND,250-250-0-0,s=1,c=1,t=18,pt=7,l=5,sg=0,ft=0,st=OK:1682.6810
Watt:196850

Am I the only one using this sketch?

[mickecarlsson]

Please post you sketch.

[gohan]

it is the one in https://www.mysensors.org/build/pulse_power

[mickecarlsson]

How is the pulse counter set up? Is it connected to the S0 port?
Edit:
If you are using S0 it is vital that you use a pull down resistor, if you dont’t have that you get false pulses.

[gohan]

I'm using the lm393 light detector. Domoticz is able to do a calculation from the pulses to give a Watt value and it is correct but it does it every 5 minutes and it is too slow for me

[sundberg84]

@gohan - is Domoticz updating anything (except switches) faster than 5 min? I dont think so...

[gohan]

If you send the watt reading faster it updates like the switch, anyway I need the watt values for node-red also

[gohan]

Could it be the Light sensor is triggering more interrupts from each pulse?

[henninne]

@niklaso

Hi Niklas,

I know this is a very old post, but its worth a try. How did you get out the daily Kwh usage? As default my sensor only gives Watts and Kwh (accumulated from start), I have tried to run a Scene in Vera UI7 where there are a function in the sensor called resetKWh(), but it looks like it doesn't do anything. Any tips would be great, thanks.

Henning

[smilvert]

@gohan I think it is a little tricky to update domoticz every minute but try update the sql-file, see the domoticz forum
https://www.domoticz.com/forum/viewtopic.php?t=10183

[gohan]

The main issue is the fact that the sensor is not calculating the instant power correctly

[DaTim69]

I created this kWh sensor with the TCRT5000 IR Barrier Line Track Sensor.
My powermeter is a ferarrismeter with 375 rotations per kWh.
I also had the problem with spikes in the power usage. But after long...too long investigation I solved the problem.
At my config it was a double issue.

Issue 1.
The problem is the pulse width of the rotation.
The pulse are at night ( low power) much wider that during the day when more power is consumed. At night the spikes in power usage where huge.

Issue 2.
Switching on/off the halogen light causes spikes and related to also strange power measurement.

Solution:
I added a second arduino mini pro as a pulse regulator between the TCRT5000 and the power meter arduino.
this arduino triggers on Rising and will always give a 100ms puls. Als debounce is handled (spikes).
I don't upload the sketch here, I'm a beginning programmer on arduino. It's made on " trail and error" but it functions as it supposed to do.
If someone wants a copy feel free to contact mee

[xydix]

@gohan Did you solve this?
I get very high watt usage as well. Sometimes like 40 000 - 130 000 watt if I check the serial monitor.
Of course, those values will never be sent to the controler.

[gohan]

Nope, I am looking at other things now. Very little time available for too many things. I'm looking at buying CT clamp and do a more direct measurement.