ECE9:
I can find these pinouts from Google but cant figure out for my case. Cant understand the correlation or logic: https://storage.googleapis.com/stateless-www-faranux-com/2017/06/Reloaded-295x300.jpg
on referred picture the labels close to pins are irrelevant. those are the uno labels.
you must use the left Dx labels. the gpio markings for rx and tx are wrong, there are io 1 and io 3.
btw: io pins on esp8266 are not called gpio (general purpose), because some of them have constraints on boot state