You didn’t mention that before!
Yes, I think you may well find a pulse there, but the comment about pin use might mean it’s custom software and it’s not included.
If that’s the case, if you’re careful then monitoring the voltage output will probably still work, but you must make sure that everything you use to do that is isolated from everything else except the heat exchanger - i.e. you use an isolated mains supply to your Arduino and opto-coupler or radio to get the data out.
@gck303 - George, did you connect your VVX20 Mitsi to your EmonTx3 in the end? I have an identical (Ecodan) pair of pumps, and am trying to connect to an EmonTx via the digital output . Any insights follwing on from your Jan post would be really helpful.
I guess plan B would be to assemble the dedicated board, which is where your post started off…
To intercept the signal from the flow sensor while the sensor is plugged into the ASHP controller we need to make a mini PCB adaptor. This is the plug that my Samsung branded VVX sensor came with, can anyone identify what plug this is and what connector will be required to plug into it?
@gck303 can you confirm if your Mitsubishi branded VVX has the same connector?