ESPHome based AUX AC PCBA REV 01 arrived

First batch of 3104-01 ESPHome AUX AC PCBAs arrived, with cool looking (at least that is my opinion) black mat soldermask!

Some basic initial testing was done:

• supplying with 5V didn't damage the PCB
• output of the regulator was stable at 3.3V
• it was possible to program the ESP32 over UART and later over WiFi
• communication tested with AUX AC device
• documentation on GITLAB updated with simple configuration

Next and final step for this project: sending the orders.