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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
Looks interesting - first I've heard of the RAK8212-M, but I don't see any reason why it wouldn't just be a RAK8212 without the sensors soldered on... In which case great - just run the firmware and don't use the sensor-related functions and you'll be fine.
Yes, that's right. Only issue is there's not much IO available to you on them (3 pins!)
Yes, that should be fine.