program failed with esp-usb-bridge under Windows (ESPTOOL-780)

[wuxx]

Operating System

Win10

Esptool Version

esptool.py v4.7.dev3

Python Version

Python 3.11.2

Chip Description

ESP32-S2FH4

Device Description

just a normal ESP32-S2 dev board

Hardware Configuration

No response

How is Esptool Run

Windows Terminal

Full Esptool Command Line that Was Run

esptool.py --chip esp32s2 -p COM12 -b 460800 --before=default_reset --after=hard_reset write_flash --flash_mode dio --flash_freq 80m --flash_size 2MB 0x1000 build/bootloader/bootloader.bin 0x10000 build/hello_world.bin 0x8000 build/partition_table/partition-table.bin

Esptool Output

D:\Espressif\frameworks\esp-idf-v5.1.2\examples\get-started\hello_world>esptool.py --chip esp32s2 -p COM12 -b 460800 --before=default_reset --after=hard_reset write_flash --flash_mode dio --flash_freq 80m --flash_size 2MB 0x1000 build/bootloader/bootloader.bin 0x10000 build/hello_world.bin 0x8000 build/partition_table/partition-table.bin
esptool.py v4.7.dev3
Serial port COM12
Connecting....
Chip is ESP32-S2FH4 (revision v0.0)
Features: WiFi, Embedded Flash 4MB, No Embedded PSRAM, ADC and temperature sensor calibration in BLK2 of efuse V1
Crystal is 40MHz
MAC: 84:f7:03:e7:62:82
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 460800
Changed.

A fatal error occurred: Unable to verify flash chip connection (No serial data received.).

More Information

changed baudrate failed, it still use default 115200 baudrate to communicate with the target chip
Issues related to esp-usb-bridge
espressif/esp-usb-bridge#19

Other Steps to Reproduce

No response

I Have Read the Troubleshooting Guide

• I confirm I have read the troubleshooting guide.

[radimkarnis]

Hello @wuxx,
thanks for the report. Could you please describe your setup a little more?
I understand that:

1. This fails on Windows, works on Linux
2. The target MCU that's being flashed is ESP32-S2F4

But what MCU is acting as the esp-usb-bridge? Is it the S2 or S3? Also, what version of esp-usb-bridge are you running? Thank you.

[wuxx]

hello, @radimkarnis the esp-usb-bridge is also based on ESP32-S2FH4, I try the latest code (commit 3ad34a7), also failure.

[radimkarnis]

Thanks for the clarification, we will try to reproduce this and see if something can be done.