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RC receiver · FD-RX-2400
Fiodel ELRS 2.4GHz Receiver
ExpressLRS 2.4 GHz receiver with a TCXO, a 100 mW telemetry front end and Wi-Fi updates.
Pre-order — ships from end of November 2026
- Full refund if you cancel any time before dispatch
- 6-month warranty against manufacturing defects
- GST invoice with every order
- Semtech SX1281 radio with RFX2401C PA + LNA front end
- 52 MHz TCXO (±0.5 ppm) radio reference
- Telemetry output in four levels up to 100 mW nominal
- Wi-Fi firmware update and binding-phrase setup (ESP32-C3)
- JST-SH 4-pin plug or solder pads — your choice
- RGB status LED and boot button
Questions before you order? Ask us on WhatsApp
Overview
The Fiodel ELRS 2.4GHz Receiver is a single-radio ExpressLRS receiver for FPV and long-range builds. It pairs a Semtech SX1281 transceiver with a Skyworks RFX2401C power amplifier and low-noise amplifier, a Johanson band-pass filter between the two, and a 52 MHz temperature-compensated oscillator as the radio reference.
An ESP32-C3 runs ExpressLRS and brings Wi-Fi with it: power the receiver without a transmitter and it opens its own hotspot for firmware updates and for setting your binding phrase. The link antenna connects by U.FL; a separate chip antenna on the board handles Wi-Fi.
It connects to the flight controller through a 4-pin JST-SH socket in the Betaflight connector-standard pinout, or through four solder pads on the back carrying the same signals. With the Fiodel F405 Flight Controller the supplied cable plugs straight in.
Specifications
Radio
| Protocol | ExpressLRS, 2.4 GHz ISM band |
|---|---|
| Transceiver | Semtech SX1281 |
| Front end | Skyworks RFX2401C PA + LNA (12 dB receive gain) |
| Filter | Johanson 2450FM07D0034 band-pass, 2400–2500 MHz |
| Radio reference | 52 MHz TCXO, ±0.5 ppm |
| Telemetry power | 10 / 25 / 50 / 100 mW (nominal) |
| Link antenna | U.FL connector |
Controller
| MCU | Espressif ESP32-C3FH4, 4 MB flash, Wi-Fi |
|---|---|
| Wi-Fi antenna | On-board chip antenna (configuration range) |
| Output | CRSF serial, 3.3 V logic |
| Status LED | WS2812 RGB |
| Button | Boot (hold while powering up for UART flashing) |
Firmware
| Ships with | ExpressLRS 3.6 |
|---|---|
| Update methods | Wi-Fi, UART, Betaflight passthrough |
| Binding | Binding phrase over Wi-Fi, or three power cycles |
Power
| Input | 5 V (runs from a 4.5 V flight-controller rail) |
|---|---|
| Regulator | TI TLV75733 3.3 V LDO, 1 A |
Board
| Size | 13.8 × 23.0 mm |
|---|---|
| Construction | 6-layer, 1.0 mm, ENIG finish, black solder mask |
| Mounting | No mounting holes (tape or heat-shrink) |
Pinout
J1Flight-controller plugJST-SH 4-pin, 1.0 mm
Betaflight connector-standard serial pinout, peripheral side.
| Pin | Signal | Detail |
|---|---|---|
| 1 | 5 V in | |
| 2 | GND | |
| 3 | TX | Receiver → flight controller RX |
| 4 | RX | Receiver ← flight controller TX |
PadsSolder pads (back)4 pads
Same signals as the plug, for direct wiring.
| Pin | Signal | Detail |
|---|---|---|
| 5V | 5 V in | |
| G | GND | |
| TX | TX | Receiver → flight controller RX |
| RX | RX | Receiver ← flight controller TX |
J2AntennaU.FL
| Pin | Signal | Detail |
|---|---|---|
| RF | 2.4 GHz link antenna |
Questions
- How do I bind it to my transmitter?
- Set the same binding phrase on the receiver's Wi-Fi page as on your transmitter, or power-cycle the receiver three times to put it in bind mode and start binding from the ExpressLRS Lua script.
- Does it work with flight controllers from other brands?
- Yes. It needs 5 V, ground and one free UART. A tinned-lead cable is included for flight controllers without a matching socket.
- When will it ship?
- This is a pre-order. Shipping starts end of November 2026, in the order pre-orders were placed. You can cancel for a full refund any time before your order is dispatched.
