Hi Lay_Lwinko,
Sorry for the bad experience.
Why this happening
After an unexpected flash failure, XMOS will restore the factory version firmware. The factory firmware of XMOS is not very compatible with the earlier upgrade program of the MCU, and the current device status is stuck in the upgrade process of XMOS to MCU. Subsequent MCU firmware has fixed this issue.
Currently, The MCU program needs to be upgraded to solve this problem.
Need your help:
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Provide the serial number, and I will generate a firmware based on your serial number to provide it to you. (As the serial number is fixed in the MCU and the brush opportunity is lost, it needs to be directly generated in the firmware based on your serial number information)
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Purchase a ( ST-Link v2 hardware tool ) and follow the instructions to upgrade the MCU.
Follow this step
Note： After providing the serial number, I will generate an MCU firmware containing the serial number and send it to you. And then upgrade the MCU
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Upgrade optb:
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Upgrade data:
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Upgrade app:
More info
If any questions, please contact me again, thanks.