FrSky radio-control systems

This page covers the low-cost FrSky range of ACCST transmitters and receivers that are supported by the PX4 system.

Transmitters

FrSky Taranis Plus

FrSky Taranis Plus Transmitter (Hobby King)

The upcoming FrSky transmitter with 8 / 16 channel (with telemetry) modes as well as a 12 channel long range (no telemetry) mode that looks very promising based on previous experience of FrSky products. An upgraded ACCST module is built in and does not need to be purchased separately but it still retains the ability to add JR modules in the same way as the Turnigy 9x for DSM-2 and DSM-X support.

Taranis is available and in use with PX4, works great.

Legacy: Turnigy 9x with FrSky ACCST

This was the default setup before FrSky made the Taranis available, which is the equivalent of the DIY Kit below. The Taranis offers additional features and is slightly more expensive, however, it is much less hazzle as it doesn't need assembly.

This set of TX, 2.4 GHz module and receiver allows MAVLink telemetry to be shown on the display if the ER9x firmware is flashed.

There is a complete tutorial with many photos on how to assemble this kit.

Parts List

Turnigy 9X 9 Ch Transmitter MODE 2 (see description above, common in Europe)
FrSky ACCST (w Telemetry) Module – the bundled receiver in this kit is unsuitable, order the receiver below.
Recommended receiver (complete list below): FrSky D4R-II 4ch 2.4Ghz ACCST Receiver (w/telemetry) (HobbyKing Shop)
- WARNING: PLEASE UPGRADE YOUR FIRMWARE TO THE 27 MS CPPM FIRMWARE Download CPPM 27ms for D4R-II, use the FrSky USB programmer to flash the new firmware (HobbyKing Shop)). It solves a potential safety issue. See also the firmware upgrade steps in the official How To-D4R-II.
Recommended batteries (TX comes with battery holder for 8x AA): Sanyo Eneloop 8x pack (Amazon US) or 2x Sanyo Eneloop 4x pack (Amazon DE). Eneloop batteries have a substantially lower self-discharge rate and will help to keep your TX always ready. (Alternative: complete Eneloop pack, e.g. EFlight TX Eneloop pack)
Recommended charger cable (use center positive, charge Eneloop with the NiMH program of your charger):

Pairing

Pairing the FrSky ACCST (w Telemetry) Module with a FrSky D4R-II 4ch 2.4Ghz ACCST Receiver is fairly simple. First make sure both devices are turned off. Then turn on the Transmitter while pressing down the button at the back. The red led should be flashing now. Then turn on the receiver while pressing down the F/S button on it. Again here the red led should be flashing as well. Now turn both devices off. Finally turn the transmitter and the receiver on again. The devices are now already paired. The transmitter shows a solid red led and the receiver's red led is off.

Receivers

All listed FrSky receivers support either CPPM or S.BUS and do not require a PPM encoder

CPPM output: FrSky D4R-II 4ch 2.4Ghz ACCST Receiver (w/telemetry) (HobbyKing Shop)
- WARNING: PLEASE UPGRADE YOUR FIRMWARE TO THE 27 MS CPPM FIRMWARE Download CPPM 27ms for D4R-II, use the FrSky USB programmer to flash the new firmware(HobbyKing Shop))
SBUS output: FrSky X8R, X6R, X4R-SB (HobbyKing Shop) ( Aloft Hobbies (USA))

Telemetry

See FrSky telemetry.

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