1. Initialization failed; the device does not display a device number nor produce sound. Want to try burning a different version, but 2. the second burn also failed

Troubleshooting
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1

The same issue:

  1. Initialization failed. The phone’s Bluetooth does not show data transmission, but the main interface displays a green network connection.
  2. Flashing failed. Attempted to flash another version a second time, but it keeps failing. The first time I downloaded was version 1.3, and now I want to download firmware version 1.4.

663e6db807fc67b7a77e527fee0cf740
663e6db807fc67b7a77e527fee0cf7401279×1706 206 KB

6ea5d3de589ffd55a7e72c75318a6d89
6ea5d3de589ffd55a7e72c75318a6d891279×1706 227 KB

image
image1166×742 130 KB

image
image1497×788 73.7 KB

The circuit diagram is shown above.

2

Please send the exception logs. Also, confirm whether the phone’s Bluetooth tethering function is enabled.