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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.
@Snerkle
On http://www.espruino.com/ESP8266 there is a small error in the table titled Shim wiring: that gives the pin mappings from the espruino pico to the esp8266 for each revision of the shim.
For the rev 2 shim pin A2 is listed twice!
I believe the second occurence:
should read
I used the Eagle PCB visualisation tool at http://3dbrdviewer.cytec.bg/ to take a close look at the shim PCB and think I've got this right.