# FlySky FS-GT2 + FS-GR3E: specs

> A 2-channel 2.4 GHz pistol-grip transmitter (FS-GT2) listed by the maker for car and boat models, with a 3-channel PWM receiver (FS-GR3E). The maker…

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A 2-channel 2.4 GHz pistol-grip transmitter (FS-GT2) listed by the maker for car and boat models, with a 3-channel PWM receiver (FS-GR3E). The maker lists the protocol of both as AFHDS.

Every value cites its sourcePinout not published

[Buy on Compoden](https://compoden.com/products/flysky-fs-gt2-transmitter-with-fs-gr3e-receiver-for-rc-car-boat)

## Specs

| Spec | Value | Source |
|---|---|---|
| Transmitter channels and models | 2 channels; models: car, boat | source FS-GT2 specifications |
| Transmitter radio | 2.4 GHz, protocol AFHDS, transmission below 20 dBm, channel resolution 1024 | source FS-GT2 specifications |
| Transmitter range | 100 to 200 m (ground) | source FS-GT2 specifications |
| Transmitter battery | 1.5AA x 8 (maker text); no charging port; low voltage alarm below 9 V | source FS-GT2 specifications |
| Transmitter data port and antenna | Phone jack (PPM); external single antenna | source FS-GT2 specifications |
| Transmitter size, weight, certification | 159 x 99 x 315 mm; 328 g; CE, FCC ID N4ZFLYSKYGT2 | source FS-GT2 specifications |
| Receiver FS-GR3E outputs | 3 PWM channels; RSSI not supported; online update: No | source FS-GR3E specifications |
| Receiver FS-GR3E supply voltage | 4.0 V to 6.5 V | source FS-GR3E specifications |
| Receiver FS-GR3E radio and range | 2.4 GHz, protocol AFHDS; 100 to 200 m (ground); single antenna 150 mm | source FS-GR3E specifications |
| Receiver FS-GR3E size and weight | 35 x 22 x 12 mm; 5 g | source FS-GR3E specifications |

## Power

| | Value | Source |
|---|---|---|
| Supply | Receiver 4.0 V to 6.5 V; transmitter 1.5AA x 8 (maker text) | source FS-GR3E specifications |

## Pinout
We don't publish a pin table for this part: no official source we could verify gives one. Check the labels printed on your module, and see the notes below.

The maker's pages give no pin table for the receiver.

## Build with it
Project ideas for the FlySky FS-GT2 + FS-GR3E. Each link opens Soldr with the prompt filled in; Soldr assigns the pins, checks power and shows how to wire every part.

- [Steering servo from the wheel](https://app.soldr.ai/?prompt=I%20want%20to%20build%20a%20radio-controlled%20steering%20demo%20where%20an%20RC%20receiver%20drives%20an%20SG90%20servo%20powered%20by%20four%20rechargeable%20AA%20cells): Four NiMH cells are about 4.8 V nominal, inside the receiver's 4.0 V to 6.5 V range and at the 4.8 V the SG90 maker page lists. The servo's stall current is not documented, so keep the load light. Learning project.
- [Wheel and trigger pulse display](https://app.soldr.ai/?prompt=I%20want%20to%20build%20a%20wheel%20and%20trigger%20pulse%20display%20that%20reads%20an%20RC%20receiver%20and%20shows%20both%20channel%20pulse%20widths%20on%20an%20OLED%20with%20an%20Arduino%20Uno): The Uno's 5 V pin is inside the receiver's 4.0 V to 6.5 V range and the sketch times the PWM pulse on each input. The maker page gives no signal voltage level for the receiver output pins; measure it with a multimeter before connecting it to any 3.3 V board. Learning project.
- [Two-servo steering and lever demo](https://app.soldr.ai/?prompt=I%20want%20to%20build%20a%20two-servo%20demo%20where%20the%20wheel%20and%20trigger%20of%20an%20RC%20transmitter%20move%20two%20SG90%20servos%20through%20a%20receiver): Each of the two receiver channels drives one servo from the same four-cell pack. Servo stall current is not documented, so test one servo at a time and use fresh cells. Learning project.

## Common mistakes

- Supply the receiver with 4.0 V to 6.5 V only; a 2S LiPo (about 7.4 V) is above the maker's range ([source](https://www.flysky-cn.com/gr3e-canshu)).
- The transmitter low-voltage alarm is below 9 V with eight cells, so use eight fresh AA cells and do not run with a weak set ([source](https://www.flysky-cn.com/gt2-canshu)).
- The 100 to 200 m range is measured on the ground; range-test with the receiver in its final position. The maker page gives no signal voltage level for the receiver output pins; measure it with a multimeter before connecting it to any 3.3 V board. ([source](https://www.flysky-cn.com/gr3e-canshu))

## Not covered by the official source

- The maker pages give no receiver current draw and no pin table.
- No source states any 2.4 GHz use rules for this set, so none are given.

## Sources

- [link](https://www.flysky-cn.com/gt2-canshu) (FlySky FS-GT2 specifications page)
- [link](https://www.flysky-cn.com/gr3e-canshu) (FlySky FS-GR3E specifications page)