Devo F12E 4in1 Modul

If you can't get DFU mode (firmware upgrade mode, EXT + Power On), probably you damaged bootloader.

1) You need bootloader file for Devo F12E - "devof12ebootloader.bin"
www.deviationtx.com/downloads-new/catego...nsmitter-bootloaders

2) You need flash bootloader. I don't know how do it with Devo F12E, but for Devo 7e:
silpstream.com/103/ultimate7e-flashing-the-bootloader/
www.deviationtx.com/forum/6-general-disc...-7e-bootloader#34250

connect "RESET" on the Tx to pin 15 (NRST) on the stlink
connect "TMS" on the Tx to pin 7 (TMS) on the stlink
connect "TCK" on the Tx to pin 9 (TCK) on the stlink
connect "GND" on the Tx to pin 20 (GND) on the stlink
connect "Vdd" (3.3V) on the Tx to pin 1 (Vcc) on the stlink

connect MCU BOOT0 (pin 94) to 3.3V (with 1K resistor, first check if pin 94 is not connected to GND).

For the 10pin st-link the connections are:
tms > swdio
tck > swclk
gnd > gnd
vdd > 3.3V

Be sure not to use the st-link 5V line as it will damage the mcu




Power bypass points, 2 pads to the right from "DC IN" connector:

You can't format Devo D12E USB drive, it has fixed format.

After flashing Deviation firmware with Dfuse 2.31, reboot transmitter, you will get "Deviation USB" screen, then copy to transmitter USB drive "devo.fs" file from firmware archive and reboot transmitter. Without this file you will always get "Deviation USB".

Flash Deviation firmware with Dfuse 2.31, reboot transmitter, you will get "Deviation USB" screen, then copy to transmitter USB drive "devo.fs" file from firmware archive and reboot transmitter.

Do you try to rewrite this file? It can be damaged or empty. Try rewrite USB drive "devo.fs" file with "devo.fs" file from firmware archive.

You will need "BuildFS.exe" to extract, edit "hardware.ini" and create a new devo.fs:

Usage of buildfs.exe is inside buildfs.zip file:
www.deviationtx.com/downloads-new/category/3-miscellaneous