ESP8266 Community Forum

- Wed Feb 17, 2016 6:18 pm #41323 Oh !
You are saying that you use OnBoard LED ? But this LED is NOT on GPIO0, it is on TX line, therefore GPIO1 !

Try changing the pin number in your sketch ...

But beware that doing that, you won't be able to user Serial in the same sketch since you will switch GPIO1 function)

Or, simply add an external LED with resistor on another GPIO, like GPIO5.

- Wed Feb 17, 2016 6:45 pm #41324 Ah, you're right, the LED is on the pin number 2. It works now, thanks!

- Thu Feb 18, 2016 7:58 am #41355 Another issue quickly resolved

@ OnlineDishwasher - under upload settings I would select NodeMCU 1.0 (ESP-12E Module) instead of NodeMCU 0.9 (ESP-12 Module). This may not be a big deal, but technically this is the board that you show on the link.

Krzysztof

- Thu Feb 18, 2016 8:59 am #41366 Thanks, what does it change?

I also noticed I can use D0 D1 D2 etc as pin names so it matches the numbers on the PCB. i.e. D1 is pin 5, but using D1 in the code will replace it to pin 5 correctly.