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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.
@fanoush
So now I got also the "pixl" one, size comparison is here https://ibb.co/album/MZPf8P
It has Li-Po battery and even 2MB SPI flash which shares SPI with the ST7567 LCD
The pinout described here
https://github.com/solosky/pixl.js/blob/main/fw/application/src/boards/board_lcd.h
matches the hardware.
It is relatively expensive compared to other ones, got one for 14 USD (which is even more than the Magic 3 watch) however it has NFC and passive B/W display so may have other use cases. And today when I searched it on aliexpress again I got the "pick 3 items" ChoiceDay deal and it was only for $8 so got few more. And BTW in same deal the simple keychain amiibo is for $2.69 including VAT/shipping. So you may try searching aliexpress for "pixl" or "amiibo", maybe you'll get the deal too.
There is no buzzer and the rocker switch on the top acts as 3 buttons (uses 3 gpios). Three pads on PCB near the NRF52382 corner are RST,SWDCLK,SWDIO so the RST could be repurposed for something.
There is blue LED and when charging it also lights up red led which turns off when charging is finished.
Unlike with the bigger one without display here the battery voltage is connected to analog pin so you can get the voltage. Also this one has the optional inductor so internal DC/DC can be enabled and works fine.