It looks like there is an ESP8266 in there. You could try uploading a Tasmota. It could be a TuyaMCU device. Does the ESP8266 connect to the microcontroller on the board via the UART port? https://tasmota.github.io/docs/TuyaMCU/
Hi, yes I have already flashed Tasmota and I also get the heartbeat of the MCU in the console, but I can't send any commands. What could be the reason for this?