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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.
@Gordon
Is there some obvious issue with the code from https://www.espruino.com/MCP23xxx (eg http://www.espruino.com/modules/MCP23017.js) that is causing it not to work?
If so it'd be good to get it fixed so others don't hit the same problems :)