[Solved] Sonoff TX EU 2C - wall light switch, firmware modification, pinout sought.

Hi,

I have a Sonoff TX EU 2C wall switch that I intend to use to communicate with another ESP that controls lighting. Pressing a button on the TX EU will result in communication with the other ESP (sending a GET request) and switching the light on.

I therefore need to use both touch buttons and the two LEDs that illuminate them. I plan to upload the OTA firmware from Arduino to the Sonoff TX EU 2C, so that I can test my solution conveniently and without cables.

Before I can do this, however, I need to have the pinout of these components: the two touch buttons and the diodes. Unfortunately, I can't find it anywhere.

Has anyone of you perhaps already modified the firmware on this switch and can give me a hint about the pinout? Where can I find it? or if someone has it, could they share their knowledge?

I enclose a picture of the board.


Thanks in advance for your hints.

Ok, in case someone is looking, here is the pinout:

Button 1 - GPIO00
Button 2 - GPIO09
Relay 1 and LED - GPIO12
Relay 2 and LED - GPIO05
Diode - GPIO13