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Trying to rescue a Yun with the 1.5.3 image.

It's not possible to upload the required "Yun Serial Terminal" sketch because the device hangs at U-Boot (hence the rescue attempt).

Using putty serial with:
Pin 0 (Rx)
Pin 1 (Tx)
Baud: 250000
8N1

This capture shows the result (which is the best I can find so far).
How do I properly connect to the serial console using the GPIO pins?

Putty Serial 250000 8N1

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  • 1
    Hold the MCU in RESET to prevent it interfering.
    – Majenko
    Nov 23 '20 at 10:59

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