@core_c
Thanks for sharing! It was my experience to that the sample values were to low.

Is it possible to share your complete version?

@edweather

Great post thanks for sharing!

I have also two of these which are not functioning anymore. Did you find a solution to the low values after all?

The S0 bus has a + and - pole But it is not really critical I think, it won't harm the port the pulses are to short but maybe it doesn't count correctly when connected wrong.

I am using a dedicated water pulsecounter.

Nice challenge:) I am using it also with Domoticz.

Take care of the poles, plus on the digital in and ground to ground.

I am using the S0 busses of the kwh meters directly, and connect one wire to the ground and the other one to a digital input as mentioned in the sketch(D3 and D5) that's all

The internal pull up's of the Arduino nano are enabled in the sketch. I understand your misunderstanding the comments in the sketch are from the original and mention the light sensor, I removed those comments now.

I have combined and changed the default Mysensors pulsecounter sketches for two S0 pulsecounters (water/solar)sketch

Connect the S0 wires to ground and the digital inputs mentioned in the sketch. The internal pull up resistors are enabled.

I didn't get it to work unfortunately.

Gizmocuz has a working sketch example

I have successfully used it.

Thanks for sharing!!

Yes it would be better to have a stable software solution but your solution is good also and even safer when there is a power failure!

Interesting workaround!

Could you please share your sketch?