Detecting Connected Boards
You can detect connected CircuitPython boards using circfirm detect.
See circfirm detect --help and circfirm detect [command] --help for more information on commands.
Detecting a CIRCUITPY Board
You can detect a connected CircuitPython board in CIRCUITPY or equivalent mode using circfirm detect circuitpy.
# Detect a connected board in CIRCUITPY (or equivalent) mode
circfirm detect circuitpy
Detecting a Bootloader Board
You can detect a connected CircuitPython board in bootloader mode using circfirm detect bootloader.
# Detect a connected board in bootloader mode
circfirm detect bootloader