I would like to flash a custom firmware into Sonoff TH16. However, I am not able to make it go into flashing/bootloader mode.
* I have soldered headers to the PCP and connecting to PC via USB to TTL adapter.
* Sonoff is powering on when connected to PC. I can see LED blinking.
* I kept the button pressed while powering on Sonoff. Still the LED is blinking and device is not getting detected in the serial port.
* I have tested continuity of power, ground, switch, etc. Everything seems to be fine.
Any idea on why I am not able to get Sonoff into bootloader mode?