Did you ever find any fittings for your flow meters?
Hey @celblazer - did you end up getting the generic arduino boards to work?
I’m currently trying to get a generic Mega to work. Connects to the PC OK - Arduino software ‘sees’ the board. I flashed the firmware, which seemed to work fine. But the board doesn’t seem to “transmit” - even when using the test pin 12 only the Rx light flashes, not the Tx. So looks like it’s not communicating properly.
Never got around to building one. Sorry.