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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.
@jeffmer
@Gordon Thanks, I missed the keypad module but that is exactly how my scanner works. To make sure nothing is missed, I keep the scanner active for 5 seconds from the last key event after the first keypress wakes it up then it goes back to waiting for a key interrupt as you describe.
@fanoush In fact, I started with some of the Aliexpress modules and in some ways, you get what you pay for. The quiescent current of the nice!nano is around 10 microamps while the Aliexpress module is more than 140 microamps.
I now have a basic editor working and I can now hack all its software on the device itself. Hope to post a video of it soon.