Hello
I have bought such WiFi relay:
How to connect it to Home Assistant? Reading doc I have configured it to work with EasyTCP_20 app but after power of and then turn on webserver has to be configured again.
Should I install different than stock firmware?
Install the Tasmota or ESPHome firmware. Note that this module uses an additional STM32 processor to control the relay so the ESP8266 sends serial commands to this processor. Both firmwares support this.
Doing firmware shoud I attach ESP module directly to USB/UART converter or I can do it using TX/RX PINs on main module with STM32 processor?
You would flash the ESP-01 module via a USB - TTL serial (3v compatible) device directly on the ESP-01 RX/TX.
