Connect
Run the following command, replacing the identifier after --port with the COMxx , /
dev/cu.usbmodemxx or /dev/ttySxx you found above.
esptool.py --port COM88 chip_id
You should get a notice that it connected over that port and found an ESP32-S2/S3.
Installing the Bootloader
Run this command and replace the serial port name with your matching port and the
file you just downloaded
esptool.py --port COM88 write_flash 0x0 tinyuf2_combo.bin
Don't forget to change the --port name to match.
There might be a bit of a 'wait' when programming, where it doesn't seem like it's
working. Give it a minute, it has to erase the old flash code which can cause it to
seem like it's not running.
You'll finally get an output like this:
©Adafruit Industries Page 256 of 263
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