You are reading a single comment by @Gordon and its replies.
Click here to read the full conversation.
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
I'm pretty sure the 2 wire connector is for a solar panel, and 3 wire is for LiPo (with a thermistor on the 3rd wire?).
There's a proper LiPo charge chip on board, so I believe connecting a solar cell is fine.
You'd have to ask RAK though or look at the circuit diagram as that's only from memory :)