Flash Backup empty?

Toniebox Hardware ESP32 (V4)
1

Hello!

Thanks for the great project!

I have the problem that my flash dump (esp32) consists entirely of 0x00. This happens both when reading with
esptool.exe -b 115200 read-flash 0x0 0x800000 tb.esp32.bin
and via Teddycloud (using the standard method as well as the ESP32 Box Flashing / Revvox Flasher).

The wiring should be correct (I soldered wires onto it). I also get the following information:
Via esptool:
esptool.exe -b 115200 read-flash 0x0 0x800000 tb.esp32.bin
esptool v5.1.0
Connected to ESP32-S3 on COM3:
Chip type: ESP32-S3 (QFN56) (revision v0.1)
Features: Wi-Fi, BT 5 (LE), Dual Core + LP Core, 240MHz
Crystal frequency: 40MHz
MAC: ….

Via Teddycloud:
Chip-Typ esp32s3
Chip-MAC 34:85:1…
Flash-Größe 8192 KiB

teddycloud says afterwards (of course):
teddycloud | INFO |esp32.c:1380:esp32_get_partition| Search for partition ‘assets’
teddycloud | ERROR|esp32.c:1414:esp32_get_partition| Partition ‘assets’ not found
teddycloud | ERROR|esp32.c:1637:esp32_fat_inject| Asset partition not found
teddycloud | ERROR|esp32.c:1795:esp32_inject_ca| Failed to patch image
teddycloud | ERROR|handler_api.c:1450:handleApiESP32PatchFirmware| Failed to generate and inject CA
teddycloud | WARN |server_helpers.c:0806:httpServerUriNotFoundCallback| >> 404 /api/esp32/patchFirmware

Am I doing something fundamentally wrong?

My procedure:

  1. Disconnect both power supply and UART (USB)

  2. Connect UART to the Toniebox

  3. Connect UART to the PC

  4. Short J100 with a jumper (I soldered in a pin header)

  5. Connect the power supply

  6. Read out the flash

Thank you very much for your help!

2

Does the box still work?

if you read 00 always, this could mean that the flash was wiped unfortunately.

3

Good morning,

It was still working perfectly until yesterday morning, but apparently I bricked it afterwards (even though I never performed a flash process). You’re right — it no longer starts up properly. This is what comes in over the serial port (without the jumper):

invalid header▒ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x7 (TG0WDT_SYS_RST),boot:0x8 (SPI_FAST_FLASH_BOOT)
Saved PC:0x40049b21
invalid header: 0xffffffff

with the J100 jumper set:

ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x0 (DOWNLOAD(USB/UART0))
waiting for download
ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0x1 (POWERON),boot:0x0 (DOWNLOAD(USB/UART0))
waiting for download
ESP-ROM:esp32s3-20210327
Build:Mar 27 2021
rst:0xf (BROWNOUT_RST),boot:0x0 (DOWNLOAD(USB/UART0))
waiting for download

Is there anything I can still save?

4

seems like i need another esp32 box to read out the firmware and then use this one only with teddycloud ( https://forum.revvox.de/t/cannot-bring-toniebox-back-to-normal-mode/919/17 )

i also have a cc3200 box. could i use the certificate from this box?

i would be happy to get some pm if anyone can help me…