Help with Magtag bootloader? | adafruit | Page 1

muted tide Jan 12, 2022, 9:29 PM

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Hi I've got a new magtag and trying to update it for circuitpython from macos. I followed the instructions (https://learn.adafruit.com/adafruit-magtag/rom-bootloader) and as far as I can tell I'm in bootloader mode and the device is on /dev/cu.usbmodem01 but getting an error from esptool.

$ esptool.py --port /dev/cu.usbmodem01 chip_id
esptool.py v3.2
Serial port /dev/cu.usbmodem01
Connecting....
Detecting chip type... Unsupported detection protocol, switching and trying again...
Connecting......................................

A fatal error occurred: Failed to connect to Espressif device: No serial data received.
For troubleshooting steps visit: https://github.com/espressif/esptool#troubleshooting

Am I doing something wrong? Any advice?

muted ocean Jan 12, 2022, 9:36 PM

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muted tide Hi I've got a new magtag and trying to update it for circuitpython from macos. I...

there is a bug in esptool v3.2 that makes detecting the chip id at runtime not work. Add --chip esp32s2 as an argument to the command line. https://github.com/espressif/esptool/issues/685. Also make sure you are in bootloader mode: hold the BOOT button, and press and release RESET.

muted tide Jan 12, 2022, 9:38 PM

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Fantastic - that did it:

$ esptool.py --chip esp32s2 --port /dev/cu.usbmodem01 chip_id

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thanks for your help @muted ocean

#Help with Magtag bootloader?