RFD900 Radio Configuration

Reference RFD-TR-001. How to configure the RFD900ux radio installed in the aircraft.

Caution

Radio settings are part of the aircraft’s delivered configuration. Change them only when an RFD release or support instruction calls for it — see Firmware & Software Updates.

Over-the-air (OTA) configuration — the standard method

PX4 does not provide a user-accessible serial-passthrough shell, so routine RFD900ux configuration is done over the air from the ground station:

1. Connect a ground RFD900 pair to your PC and establish a link with the aircraft.
2. Open QGroundControl and go to the Radio / SiK Radio configuration tab.
3. Click Load Settings — the tool retrieves settings for both the Local (ground) and Remote (aircraft) radios.
4. Modify the Remote settings as required (NetID, power, duty cycle) and click Save — the changes are sent over the air to the aircraft’s radio.

Danger

Do not change the baud rate or attempt a firmware update over the air — changing the baud breaks the link mid-operation and can leave the airborne radio unreachable. Those deeper changes require physical access; contact RFD support.

Deep changes (baud rate, radio firmware)

Changing the airborne radio’s baud rate or firmware requires a direct serial path to the radio, which the RFD PX4 configuration does not expose in the field. If you believe you need this, contact support@rocketfastdrones.com — RFD will advise the procedure (or perform it at service) for your aircraft and radio revision. Refer to the RFDesign RFD900ux manual for the underlying AT-command reference.