Any way to flash new software without BOOT button? (EUB-69)
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I have been delievered two esp-usb-bridge hardware devices, one has a broken BOOT button. Is there a way to flash new software to that hardware without the BOOT button being pressable?
Can you please be more specific about the hardware device? I don't think we sell anything right now with esp-usb-bridge but I know about some non-Espressif board manufacturers who sell devices with esp-usb-bridge (usually they have their own issue trackers).
Generally speaking, If the serial RTS & DTR signals are connected to the Reset and Boot pins of an ESP32(-*) device then the device can be flashed with esptool without pressing the Boot button. More about this can be found at https://docs.espressif.com/projects/esptool/en/latest/esp32/advanced-topics/boot-mode-selection.html#automatic-bootloader.
https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32s3/esp32-s3-usb-bridge/index.html – isn't this an official Espressif device?
As far as I understand the schematics, RTS & DTR for the S3 are not available through the pin headers…
Yes, I'm sorry, I forgot about that one. It was done by a completely different team.
If I read this table well then pin no. 3 is the boot signal for the module. Have you tried to connect it to GND while powering it up (sticking it into the USB slot)?
Perhaps it would be best to try DFU or esp-usb-jtag?
Shortening the boot pin and the ground has no effect on this device.
I might try JTAG.
FWIW, it looks like the latest software/documentation for this device is here: https://github.com/espressif/esp-dev-kits/tree/master/esp32-s3-usb-bridge/examples/usb_wireless_bridge/
I'm closing this because this is not a firmware issue. I can recommend to send back the damaged board if you are not able to use the above recommendations.