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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.
@yngv126399
https://drive.google.com/file/d/1hldJC7VxSTJEAsg58bTm_5uf5vYUMxqG/view?usp=drivesdk
Up at the top under some foam, you'll see the 4 pins. from left to right: IO, CLK, 3.3, GND. Good to test them first though. If you leave the battery connected, you don't need to use the 3.3v.