The pins marked with blue ADC on the board itself can be used. On Espruino WiFi any pin that you can physically connect to is free for you to use (although B6/B7 have the Espruino console on them when USB is disconnected - I'll update the docs).
Anything with a Pink mark is used for other functionality and can't be used.
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.
There's a diagram here: http://www.espruino.com/WiFi#pinout
The pins marked with blue
ADC
on the board itself can be used. On Espruino WiFi any pin that you can physically connect to is free for you to use (although B6/B7 have the Espruino console on them when USB is disconnected - I'll update the docs).Anything with a Pink mark is used for other functionality and can't be used.