How to save my device from OTA failure?

[qdwang]

Device: LILYGO T-Display-S3

Background

I purchased the device and flash the Jade latest firmware with secure boot enabled.

Everything works but I forgot to disable the DEBUG log output which could cause the Sparrow wallet failed to unlock the device.

So I try to do the OTA update with the DEBUG log disabled firmware.

The OTA result shows successful on both the device screen and my computer's terminal.

Problem

After I reboot the device, it became this:

Is it possible to save my device?

I tried to flash the firmware again by using idf.py tools but it failed due to

Connecting......................................
/dev/cu.usbmodem101 failed to connect: Failed to connect to ESP32-S3: No serial data received.

I think it's caused by the secure boot.

So can I save the device on my own? Or I have to send it to the manufacturer to rewrite the chip?

[JamieDriver]

Once you enable 'secure boot' you can no longer flash the device. (That's partly what the 'secure' is about - no-one can take your hw and flash nefarious fw onto it).

[qdwang]

@JamieDriver
Thanks for the reply. I managed to recover my device by doing the OTA again with the previous firmware.

It seems the only way to recover is

1. The OTA update functionality still works despite the device's issues.
2. You have a backup of the previous firmware bin file.