Unable to flash Radiomaster Pocket v3.5.5 via USB/UART – COM port not detected

[hushed sapphire]

Device: RadioMaster Pocket (internal ELRS, EdgeTX)
Target firmware: v3.5.5
Flashing method: UART (Serial) via USB (COM4)

Issue:

COM4 (STMicroelectronics Virtual COM Port) is recognized after driver install

Selecting UART in ExpressLRS Configurator, pressing Build & Flash triggers build process, but fails with a build error, and the firmware never writes to the device

Steps taken:

Used top USB-C (DATA) port

Installed STM32 VCP driver (STSW-STM32102)

Selected correct device: RadioMaster 2.4 GHz → Pocket Internal TX

Tried different cables and rebooted devices

Still encountering build error—COM port is detected but flashing doesn’t complete

any help would be appreciatted. Tq

[shadow sequoia]

can you post a photo of the back of the pocket without the module bay cover, and the radio turned off please

[hushed sapphire]

is this suffice

[shadow sequoia]

better if the radio itself..

wrong radio in the right box can happen

[shadow sequoia]

can you post screenshot of the device manager app with the radio plugged in in vcp mode

and post the !log file from your latest attempt here

[dense kelp]

See the following image to save a log file from the configurator

https://cdn.discordapp.com/attachments/798006228450017290/1025339571979960340/LogSaveToFile.jpg

[hushed sapphire]

I believe its this

[shadow sequoia]

unplug radio from usb.. if com4 disappears, then that is the radio..

[hushed sapphire]

here is the log

[shadow sequoia]

seems you're selecting via UART instead of via ETX passthrough

[hushed sapphire]

Yes it the radio

[shadow sequoia]

please FOLLOW the step-by-step guide here:
https://www.expresslrs.org/quick-start/transmitters/rm-internal/#via-etx-passthrough

[hushed sapphire]

I tried ETX passthrough but couldnt find the radio

[shadow sequoia]

FOLLOW the guide please

[hushed sapphire]

Okay I saw thank you so much