YTF IR Bridge
This device is based on a Tuya Wi-Fi module and may still be flashable with Tuya-Convert.
Like most devices, GPIO0 has to be held low during power up to get into flash mode. In the picture below, notice the red jumper wire between IO0 and GND. I soldered it in such a way I could hold it during power on, but release later (basically acts as a button), since it can not be held low if you want normal operation.
|04||LED1i (52)||Blue LED - Link status|
|05||IRrecv (51)||IR Receiver|
|14||IRsend (8)||IR Transmitter|