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Not that I know of. Thank you buddy.I got it working right now.There is no need to configure anything to the bt moduleJust flash the bootloader and write the firmware and everything is done.We never know the FrSky working baudrate in their firmware,should be 57600kbps or 115200kbps.I think AT comma...

Kilrah wrote: ↑Thu Jan 16, 2020 3:54 am No, once the bootloader is on flahsing the firmware is done using the normal TX/RX pads, that's the bootloader's job.

After flashing the bootloader & firmware successfully,is it something related to baudrate setup before installing the module to the radio board?