![]() ![]() Update: I also forgot to mention-it's possible to get output from the Pi's own bootloader (at an even earlier stage) using the BOOT_UART option supplied to a custom EEPROM build see cleverca22's post in the Pi Forums for details. I've done this process a few times in the past, but I've grown tired of looking back at old notes to remember specifically which pins to use on the GPIO, since I don't do it that often and the pins are unlabeled on most Pis. See also: Adafruit's guide to using a serial console on the Pi. Note: To exit the screen session, press Ctrl-A, then Ctrl-K, and confirm you want to exit. Additionally, if you're attaching to a device using minicom running on the Pi, you have to press Enter, then Ctrl-A, then Q, and Enter again to exit minicom. Note: In minicom, the Meta key is mapped to 'Esc' by default, at least on macOS.
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