Monitor Teensy debug output
Connect to the Teensy serial port to view debug information.
The firmware prints diagnostic messages over USB serial. Use Python’s serial tools to open the port and inspect output.
bash
SERIAL_NUM=$(ls /dev/serial/by-id/ | grep -i teensy | head -n1)
SERIAL_DEV=/dev/serial/by-id/${SERIAL_NUM}
echo $SERIAL_DEV
bash
python3 -m serial.tools.miniterm $SERIAL_DEV 115200