GPIO Pin suggestion

[JonoGSmith]

Hey all, thanks for the event.

The ESP8266 requires GPIO2 to be high on boot else it fails. (It also connects to the on-board LED).
On our board this is mapped to D4, which meant we had to unplug the lights during flashing/power on and back in afterwards.

A general purpose pin that could be used through boot is D2 (GPIO4) - just make sure to solder the pin in place and edit the config file.

Source: GPIO Behaviour
The store page has a diagram