FAQ

Q: When connected to a USB port, the computer does not detect the COM port.

A: Press and hold the BOOT button (do not release it), reconnect the Type‑C power cable to the USB port, and release the BOOT button after power‑on.

Q: How do I switch the 3.5mm headphone jack between US and CN standards?

A: The PCB board has reserved switching circuits for US/CN standards with corresponding silkscreen markings. You can switch between the US and CN headphone jack standards by adjusting the positions of the corresponding 0Ω resistors.