A: Flight controllers: PIXHAWK/Mini Pix/TURBO PiX/APM

Transmitters：AT10II/AT10/AT9S Pro/AT9S/AT9

Receivers：R9D/R9DS/R10D/R10DII/R10DS/R12DS

Note: Old version AT9 needs to upgrade the firmware to V1.2.6(OSD)or above while AT10II needs to upgrade to V1.0.6(OSD)or above.

A：1. With receiver (R12DS as an example): one end of the 4pin wire is to the pins on the receiver while the other end of the wire is to the balance head of the battery as the below picture shows

2. With the flight controller: one end of the wire to PRM-03 while the other is to the TELEM port on the flight controller

Mini Pix as example TURBO PIX as example

PIXHAWK as an example APM as an example

A: Capable of telemetry of flight speed, rising speed, throttle, battery voltages, longitude, latitude, GPS, signal, RSSI, flight modes, direction, roll, pitch, and distance.

A: Since ardupilot updated the firmware recently, when users use PRM-03 with RadioLink transmitters AT9S Pro, AT9S, AT9, AT10II, AT10, and the ardupilot pixhawk flight controller with the V4.1 or above firmware, only telemetry of model voltage is supported, telemetry of other OSD data is not supported. Please solve the problem by changing the value of SERIAL1-PROTOCOL and SERIAL2-PROTOCOL in Mission Planner.

CONFIG- Full Parameter Tree- search “serial”
-Change the value of SERIAL1-PROTOCOL and SERIAL2-PROTOCOL
 to 1(MAVLink) 

Note: PRM-03 produced before May 31, 2022 can refer to this
 method to modify the value, and those produced after May 31，
  2022 do not need to modify the value.  

A: It’s probably because the connection to the PRM-03 is not good or the chip doesn’t function and needs to be repaired.

A: 0.1m/s. That means the minimum speed that can be displayed on the telemetry interface of the transmitter is 0.1m/s.

A: You need to adjust the parameter of the flight controller. Connect the flight controller to Mission Planner. Search for SERIAL1_PROTOCOL in the Full Parameter List. Select MAVLink2, and click Write Paras to save the modification.

A: Yes. Please flash APM firmware on F405. (APM firmware download link: www.radiolink.com/f405_apm_firmware).

Connection instructions: Connect the left end of the PRM-03 to the receiver, and the right end to F405 flight controller. Connect the TX and RX pins on the right side of the PRM-03 to any RX and TX pins on F405 (see the diagram below). Connect the 5V and GND pins to any 5V and GND pins on F405.

Note: Connect the TX pin on the right side of the PRM-03 to the RX pin on F405; Connect the RX pin on the right side of the PRM-03 to the TX pin on F405.

A: No.