Wonder if anyone can help
I have a Sonoff Basic ("RF R2 POWER V1.0") which I've hooked up to the FTDI adapter (3.3v, GND to GND, TX to RX, RX to TX).
If I just plug it in to the USB port it boots up like a regular sonoff, LED flashes etc.
I then unplug the USB, hold down the black button on the Sonoff, plug the USB in and keep the button pressed down (for up to 10s), let go and it doesn't boot up like normal, no LED's lighting up on the sonoff which as far as I know is a good indicator its in flash mode. I then run the Tasmota PyFlasher but it just sits on "Serial port COM13" (which is the right one) and does nothing. The FTDI TX/RX never flicker like when it's not in flashing mode.
If I open Termite it just says waiting for port.
Any ideas what could be wrong?

I have a Sonoff Basic ("RF R2 POWER V1.0") which I've hooked up to the FTDI adapter (3.3v, GND to GND, TX to RX, RX to TX).
If I just plug it in to the USB port it boots up like a regular sonoff, LED flashes etc.
I then unplug the USB, hold down the black button on the Sonoff, plug the USB in and keep the button pressed down (for up to 10s), let go and it doesn't boot up like normal, no LED's lighting up on the sonoff which as far as I know is a good indicator its in flash mode. I then run the Tasmota PyFlasher but it just sits on "Serial port COM13" (which is the right one) and does nothing. The FTDI TX/RX never flicker like when it's not in flashing mode.
If I open Termite it just says waiting for port.
Any ideas what could be wrong?

