Hello!
Okay, Adafruit makes this 32u4 board, Adafruit Feather 32u4 Basic Proto it can be programmed to do two things. First is to log its battery voltage settings, (How is is that 3.7v Lipo charged to, then what is it running down to.), also the internal chip temp, that the Arduino folk use (might use) for the random number problems.
Currently the sketch is sending the text out to a FTDI basic3.3v device from Sparkfun. I’d like to send it to the OpenLog device and to eventually store it on an SD card. I also see that I need to use an older release of the IDE to build the code it would need to do all of that. I’m at 1.8.19
Gregg Doctor Who8