A simple micropython program for finding the correct pins on your micropython board if they are incorrectly or not-at-all labeled.
It simply asks you what pin you want to test then turns that pin on or off.
Tested on ESP8266 only, but should work on any other board too.
If you want to directly download it to your board if it is internet enabled:
import mip
mip.install('github:asherevan/micropython-pin-tester/test_pins.py')It will be downloaded to /lib on your device's filesystem