Hi @OlivierB,
That’s very strange behavior.
However, to debug this issue further, I have attached two compiled .bin files. One will be for Wi-Fi scanning and the other will be to test the firmware version. Could you upload them to Wio Terminal and try? Also, are you familiar with uploading .bin files to Wio Terminal?
If yes, you could upload and open serial monitor with 115200 baud rate.
WiFi Scanning: https://1drv.ms/u/s!AuZmsghKqp9tiKMGLQoUZWumqHhgJA?e=wuqztg
Firmware Version: https://1drv.ms/u/s!AuZmsghKqp9tiKMHaLS99ca76kRo-A?e=fhA0eT
If that also fails, could you use the below repo to erase the existing firmware and flash new firmware as mentioned in the wiki:
As you can see, the repo has been updated yesterday with the new firmware:
After this, please try again.
Let me know your results.
Best Regards,
Lakshantha