Can't upgrade firmware on Flipper Zero WIFI Devboard

Error

n 0x8000 partition-table.bin
esptool.py v4.6.2
Serial port /dev/ttyACM0
Connecting......................................

A fatal error occurred: Failed to connect to ESP32-S2: No serial data received.

Description

/dev/ttyACM0 was opened for communication but did not receive data from the WIFI Devboard. Possible reason might be communication parameters baudrate and RTS/DTR.

Possible solution

Following instructions https://docs.flipper.net/development/hardware/wifi-developer-board/update

When entering the command for flashing the ESP32, change your communication speed to 115200 (never tried higher, might work). Make sure you identified virtual serial port, /dev/ttyACM0 in my Arch Linux example.

esptool.py -p /dev/ttyACM0 -b 115200 --before default_reset --after hard_reset --chip esp32s2 write_flash --flash_mode dio --flash_freq 80m --flash_size 4MB 0x1000 bootloader.bin 0x10000 blackmagic.bi
n 0x8000 partition-table.bin

Upgrading through the GPIO UART Bridge instead instead of directly to the Dev board.

5V on GPIO: off

 Enter USB-UART Bridge

GPIO->USB-UART Bridge->Config