A fatal error occurred: Failed to write to target RAM (result was 0107) (ESPTOOL-95)

[emeyedeejay]

(Please delete any lines which don't apply.)

• Operating system: Windows 10
• Python version: 3.64
• ESP hardware in use: ESP8266 on Itead SonOff smart WiFi switch (basic)
  Detecting chip type... ESP8266
  Chip is ESP8266EX
  Features: WiFi

Full esptool.py command line as run: python esptool.py --port COM3 read_flash 0x00000 0x100000 image1M.bin

Full output from esptool.py (please copy and paste all lines of output) D:\Downloads\esptool-2.3.1>python esptool.py --port COM3 read_flash 0x00000 0x100000 image1M.bin

esptool.py v2.3.1
Connecting....
Detecting chip type... ESP8266
Chip is ESP8266EX
Features: WiFi
Uploading stub...

A fatal error occurred: Failed to write to target RAM (result was 0107)

What is the expected behaviour? Backup of current firmware

Do you have any other information from investigating this? Tried with 2 different USB -> Serial devices. FTDI232 and PROLIFIC USB-to-serail adapter

Is there any other information you can think of which will help us reproduce this problem?

[projectgus]

Hi @emeyedeejay,

Thanks for reporting this. The device is suddenly failing while uploading the "stub loader" code into its IRAM. Usually this suggests a power supply problem or a signal integrity problem with the USB/serial connections.

Check all power and signal/ground connections to the device. You could try setting a lower baud rate (for example -b 9600) and see if the problem improves at all.

Angus

[emeyedeejay]

Many thanks for the feedback/input.

I tried another actual FTDI USB->serial cable and was successful so it looks like it was my Chinese "ftdi" and USB-> serial components that are causing the issue here. It; odd though, they have never given me any issues with anything else I have ever used them for (Arduino based activity).

I'll try again with these devices to confirm them as the problem but it looks like you can close this issue.

If there is any additional info you want form me, please let me know...

Best,
Mike

[projectgus]

Thanks for the update. Feel free to reopen if you think there's something esptool should be doing differently here.

[vgonet]

Hello,

I've the same problem than emeyedeejay. I'm trying to program the ESP32 through a STM32. I convert the USB frames to USART (and USART to USB). The information sent by the ESP32 are OK until the Uploading stub. Do you know what is the problem ?

Thank you
Best
Vincent

Flashing binaries to serial port COM14 (app at offset 0x10000 )...
esptool.py v2.5.0
Serial port COM14
Connecting.....
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core
MAC: xx:xx:xx:xx:xx:xx
Uploading stub...

A fatal error occurred: Failed to write to target RAM (result was 01050000)
make: *** [/home/Vincent/esp/esp-idf/components/esptool_py/Makefile.projbuild:63: flash] Error 2

[stigok]

FWIW: If using esptool on a Raspberry Pi using the GPIO serial interface at /dev/serial0 you have to disable the login shell being available on that device. You can disable this in the interface options in raspi-config.

This produced some different errors throughout 50 attempts, amongst them, the A fatal error occurred: Failed to write to target RAM (result was 0107), or a waiting for header timeout.

[sandikodev]

done with turn another plug usb

[tneish]

If you're flashing e.g. a sonoff make sure the "OTA" jumper is on/pin is bridged. Without it I think you get 0107 because the flash is write protected.

[alunomakerdigital]

Boa Tarde.
Estava com esse problema e foi RESOLVIDO COM AS ORIENTAÇÕES DESTE TÓPICO.
TROQUEI O CABO USB ...
PARABÉNS A TODOS.
MUITO GRATO.

[azrin1972]

Hi,

Im using a LilyGo TTGO T-Call Sim800L v1.4

The upload UART is using the USB C. here is the error I'm getting

[lordofswe]

I am using another LilyGo product but the same problem as azrin1972.

[fhb]

This happens to me acactly too, tried a lot of things. Drivers are up to date. It's a ESP32-WROM with 30 Pins and USB/UART CH9102x.

``/Users/Felix/Library/Arduino15/packages/esp32/tools/esptool_py/3.0.0/esptool --chip esp32 --port /dev/cu.usbmodem52870049811 --baud 115200 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_freq 40m --flash_size detect 0xe000 /Users/Felix/Library/Arduino15/packages/esp32/hardware/esp32/1.0.6/tools/partitions/boot_app0.bin 0x1000 /Users/Felix/Library/Arduino15/packages/esp32/hardware/esp32/1.0.6/tools/sdk/bin/bootloader_qio_40m.bin 0x10000 /var/folders/br/k52zl5l16bgg65qt6cqzmm9r0000gn/T/arduino_build_58002/sketch_jun06c.ino.bin 0x8000 /var/folders/br/k52zl5l16bgg65qt6cqzmm9r0000gn/T/arduino_build_58002/sketch_jun06c.ino.partitions.bin
esptool.py v3.0-dev
Serial port /dev/cu.usbmodem52870049811
Connecting....
Chip is ESP32-D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
Crystal is 40MHz
MAC: 3c:61:05:14:e8:14
Uploading stub...

A fatal error occurred: Failed to write to target RAM (result was 01070000)
A fatal error occurred: Failed to write to target RAM (result was 01070000)
``

[lmayencourt]

I'm facing the same issue with a few ESP32 DEVKITV1 I got from aliexpress:

esptool.py v2.6
Serial port /dev/cu.usbmodem52870048231
Connecting......
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
MAC: 3c:61:05:14:57:34
Uploading stub...

A fatal error occurred: Failed to write to target RAM (result was 01070000)
A fatal error occurred: Failed to write to target RAM (result was 01070000)

Any hint to resolve this?