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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.
@MaBe
The PCA9501 is an 8-bit I/O expander with an on-board 2-kbit EEPROM.
It has six address pins with internal pull-up resistors allowing up to 64 devices