ESP8266 Community Forum

Hey guys, I recently finished an arduino nodemcu project but while building it I couldn't find a definitive list of all the pins, what they do and how to call them from arduino.

I basically used D1-D9 and that was all but for the next project I have in mind I need more ports.

I expect I will need to expand using i2c port expanded and i'm using i2c on D2+D3 for the lcd but only by luck rather than judgement so it would be great to actually know what I'm doing next time round.

The pins highlighted in orange are the aduino equivalent pins.

That's brilliant thanks!

I'll definitely need some I/O expansion for the next one!

so what do gpio 16,9,10 map to?

i get that the nodemcu is heavily biased towards lua instead of arduino, but surely the mapping is documented somewhere?

all i can find are these references and they're outdated and not very helpful for arduino anyway:

https://github.com/esp8266/Arduino/blob ... odemcu-09-

https://github.com/esp8266/Arduino/blob ... digital-io

https://github.com/nodemcu/nodemcu-devkit-v1.0#pin-map