FC-ESC Stacks
Betafpv SuperX ELRS Gemini Xross Receiver Nano (ELRS 2.4G+915M)
₹2,999.00
Powered by Semtech’s LR1121 RF chips and Espressif’s ESP32-C3, the SuperX pioneers BETAFPV’s first Gemini Xrossband receiver – mastering 900M (868/915MHz) and 2.4G bands via LoRa and blistering 1000Hz FSK modes. Conquer race gates and long-range horizons with unshakeable signal reliability, where lesser links fail. Choose the dual-band mastery of SuperX Nano or the band-switching agility of SuperX Mono for precision-tuned performance in any flying scenario.
Bullet Points
- Semtech LR1121 RF chips + Espressif ESP32-C3
- LoRa and blistering 1000Hz FSK modes
- Supports 900M Gemini, 2.4G Gemini, 900M+2.4G GemX
- SuperX Nano: Dual-band mastery for RF-challenged environments
- SuperX Mono: Band-switching for micro builds
- Works with Micro/Micro V2/Nano V2/SuperG TX modules
- Compact and lightweight
Specifications
| SuperX Mono RX | SuperX Nano RX | |
| MCU | ESP32-C3 | |
| Telemetry Power | 20dBm | |
| Input Voltage | 5V | |
| Protocols | CRSF, SBUS, SUMD, DJI RS2 Pro, MAVLink | |
| RF Chip | Single LR1121 | Dual LR1121 |
| Reception Mode | Single | Diversity/Gemini |
| Frequency Band | 900M/2.4G | 900M+2.4G |
| Antenna Connector | U.FL x1 | U.FL x2 |
| Weight | 0.82g | 1.45g |
| Dimensions | 12.3 x 18.6mm | 16.3 x 21.4mm |
| LUA Name | BFPV SuperX Mon | BFPV SuperX Nan |
| Recommended | 2”- 5” drones (racing, freestyle, long-range) | 5” + drones (freestyle, photography, long-range) |
Diagram
SuperX Nano Receiver:
SuperX Mono Receiver:
Gemini
ExpressLRS Gemini revolutionizes RC control by leveraging true diversity hardware to simultaneously transmit across 2.4GHz and/or 900MHz frequencies. Unlike conventional systems, Gemini utilizes dual independent transmit/receive chains – delivering superior link quality (LQ) that thrives in challenging environments like race courses or urban areas.
Gemini offers three modes: 900M Gemini, 2.4G Gemini, and 900M+2.4G Gemini Xrossband (GemX). With GemX, you no longer need to choose between performance traits—it combines 2.4GHz’s low latency and 900MHz’s long-range in a single, seamless link.
Note: The GemX mode requires a dual-band TX.
SuperX Nano: 900M+2.4G Dual Band
Powered by dual LR1121 chips from Semtech, the SuperX Nano Receiver delivers uncompromising signal reliability with three modes: 900M Gemini (long-range penetration), 2.4G Gemini (ultra-low latency), and 900M+2.4G GemX (simultaneous operation). The included dual-band T antennas eliminate frequency-switching hassles, while advanced diversity processing ensures rock-solid stability in RF-challenged environments. Built for mission-critical applications, it’s the ultimate solution for competitive racers, long-range explorers, and professional aerial photographers who demand zero-compromise performance.
SuperX Mono: Band-switching Agility
The compact and lightweight SuperX Mono Receiver harnesses a single LR1121 chip with a dual-band antenna, enabling seamless switching between 900M and 2.4G. This cost-effective solution maintains impressive 1000Hz packet rates (in FSK mode) while offering exceptional value, making it ideal for micro builds and budget-conscious pilots who need versatile performance in both close-range freestyle and long-distance applications.
TX Compatibility
SuperX vs. SuperD vs. Nano
| SuperX RX | SuperD RX | Nano RX | |
| MCU | ESP32-C3 | ESP32-PICO-D4 | ESP8285 |
| RF Chip | Dual LR1121, LR1121 | Dual SX128X (2.4G), Dual SX1276 (900M) | SX128X (2.4G), SX1276 (900M) |
| Antenna Mode | Gemini, single | True diversity | Single |
| Frequency | 900M+2.4G, 900M/2.4G | 2.4G/900M | |
| Telemetry Power | 20dBm | 20dBm (2.4G) / 17dBm (900M) | |
| Modulation | LoRa, FSK | LoRa, FLRC | |
| Serial Output Protocol | CRSF, SBUS, SUMD, DJI RS2 Pro, MAVLink | ||
BETAFPV ExpressLRS Receivers
Choosing the right receiver is critical for optimal FPV performance. BETAFPV’s ExpressLRS lineup offers tailored solutions for every pilot: ELRS Lite, Micro, Nano, SuperP, SuperD, and the newest SuperX. From whoop racing to long-range cinematography, we engineer the low-latency links and interference-proof performance you demand.
Configuration
The SuperX Receiver currently supports CRSF/SBUS/SUMD protocols. The following takes CRSF protocol as an example to introduce its connection and pin configuration with Betaflight firmware flight controller.
Wiring diagram:
JST SH connector pin configuration:
Note: Betaflight and ExpressLRS use different JST SH connector pin configurations. Betaflight: 5V (V+), GND, RX, TX; ExpressLRS: GND, 5V (V+), TX, RX. When using the terminal wires for connection, please check the sequence.
Connect the flight controller to the Betaflight Configurator for basic configuration. First, on the “Port” tab, enable the flight controller serial port like UART1 as Serial Rx.
On the “Configuration” tab, set Receiver Mode to Serial (via UART) and Serial Receiver Provider to CRSF.
Bind
The SuperX Receiver uses ExpressLRS V3.x official protocol as its default firmware without a pre-set binding phrase. For successful operation, ensure the transmitter module also uses ExpressLRS V3.x or later firmware with no pre-set binding phrase.
- Power-cycle the receiver 3 times with a 1-second interval or press and hold the BOOT button for 2 seconds to enter binding mode.
- The RGB indicator flashes orange twice, which indicates the receiver is in bind mode.
- Configure remote control or transmitter module to bind with the receiver. If the RGB indicator is a solid light, it’s bound!
Notes:
● After binding once, the receiver will remember the autosaved binding phrase and device. Further restarting of the device will be bound automatically without the need for a rebinding process.
● If you have flashed firmware to the SuperX and configured the binding phrase, you will not be able to bind using the method above. Please set the same binding phrase for the transmitter module, this allows the receiver to be bound to the device automatically.
● It is recommended to place the two antennas as far apart as possible for better reception.
Know More About ExpressLRS
ExpressLRS is an open-source RC link for RC applications. Everyone could find this project on Github or join the discussion in Facebook Group.
File
- User Manual for BETAFPV SuperX ELRS Gemini Xross Receiver
- Firmware for SuperX ELRS Gemini Xross Receiver
- How to flash the firmware of SuperX Receiver via Passthrough or WIFI?
- To minimize GPS interference when using 868MHz, X150, or LowBand packet rates, avoid setting the telemetry ratio to 1:2 unless absolutely necessary—especially at 100mW telemetry power.
If you require MAVLink or a 1:2 telemetry ratio, please position the SuperX receiver as far as possible from the GPS and avoid pointing the receiver antenna toward the GPS during satellite acquisition.
Package
Item: SuperX ELRS Gemini Xross Receiver – Nano
- 1* SuperX Nano Receiver
- 2* Dual-band T Antenna
- 1* SH1.0 Connector (Double Ended)
- 2* Heat Shrink Tubing
- 1* User Manual
Item: SuperX ELRS Gemini Xross Receiver – Mono
- 1* SuperX Mono Receiver
- 1* Dual-band T Antenna
- 1* SH1.0 Connector (Single Ended)
- 2* Heat Shrink Tubing
- 1* User Manual
MAECENAS IACULIS
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Betafpv F4 2-3S 20A AIO FC V1
Bullet Point
- Designed for HD VTX, it features a dual 9V@2A for DJI O3 and 5V@3A for external device BEC solution to prevent screen blackout on the DJI O3 due to low voltage during throttle increase.
- It includes a new DJI O3 6-pin PMU for easy installation without soldering, reducing assembly complexity. Newbie friendly.
- The power range of 2-3S provides increased thrust and improved control with a 20A ESC featuring a single NMOS for continuous current capability.
- The upgraded onboard receiver allows selective power cutoff for saving power and offers additional UART TX3 and RX3 ports for connecting the external device.
- Redesigned solder pad layout ensures larger, more secure pads for easy and reliable soldering, while the relocated USB port at the rear facilitates computer tuning.
- It features an STM32F405RGT6 chip, Integrate Serial ELRS 2.4G receiver, 16M black box, barometer, current meter, reserve 3 complete serial ports and a standard SBUS, support GPS, HD VTX, external receiver, and other equipment.
Specification
- Weight: 5.58g (without motor connectors and power cable),5.92g (with motor connectors)
- Mounting Hole Size: 26mm x 26mm
- CPU*: STM32F405RGT6 (168MHz)
- Six-Axis: ICM42688P/ICM42605 (SPI connection)
- RX: Serial ELRS 2.4G Receiver
- RX firmware version: BETAFPV AIO 2400 RX ELRS V3.3.0
- Antenna: Enameled wire
- Blackbox Memory: 16MB
- Sensor: Barometer (BMP280/DSP310), Voltage & Current
- 5V BEC*: 5V 3A@8V supply
- 9V BEC*: 9V 2A@8V supply
- USB Port: SH1.0 4-Pin
- Built-in ESC with 20A continuous and peak 25A current
- ESC input voltage: 2-3S
- FC firmfware version: Betaflight_4.4.1_BETAFPVF405
- ESC firmware: C_X_70_48_V0.19.2.hex for BB51 Bluejay hardware
- Signal support: D-shot300, D-shot600
Diagram
Comparison
We upgraded the FC from F4 1S 12A AIO FC V3 to F4 2-3S 20A AIO FC V1. The upgraded FC features an ESC with a pulse overcurrent capacity of 25A, ensuring stable operation of the flight controller even in the event of motor stalling. The addition of a 9V 2A BEC power supply ensures the stable operation of the DJI O3 HD VTX when the battery voltage is low. It also includes a DJI O3 6-pin PMU allowing for connection to HD VTX without soldering. It integrates features such as a 16MB black box, with support for GPS, external receivers, and other devices. The redesigned solder pad layout and USB connector make installation and maintenance easier and more convenient.
| F4 1S 12A AIO FC V3 | F4 2-3S 20A AIO FC V1 | |
| Weight | 4.23g | 5.58g |
| BEC | 5V@3A for External RX | 5V@3A for External RX
9V@2A for DJI O3 |
| Connector for DJI O3 | Not support | Support |
| ESC Current | 12A | 20A |
| ESC Input Voltage | 1-2S | 2-3S |
| Number of Serial Ports | 2*UART, 1*SBUS | 4*UART, 1*SBUS |
Note: If you use the F4 2-3S 20A AIO FC V1, the serial port of the SBUS receiver is UART5 while F4 1S 12A AIO Brushless FC V3 is UART6.
F4 2-3S 20A AIO FC V1 also has extended the USB port to the end for easier parameter adjustment and wiring. And a new DJI O3 6-pin PMU has been added for convenient installation and maintenance.
FAQ
Power cutoff: Removing the chip bead disconnects the power supply, and to reuse the onboard ELRS receiver, soldering the solder pads together restores power.
UART3 release: Removing two resistors on the solder pads releases UART3. The left side is TX3, and the right side is RX3. To reconnect, solder the solder pads together when reusing the onboard ELRS receiver.
Voltage Switch: The HD VTX connector defaults to 9V. The chip bead is soldered between the 9V pad and the middle pad. To use WalkSnail Avatar HD mini 1s and Lite, please ensure the power supply voltage is 5V. Remove the chip bead first from the 9V pad and solder it between the middle pad and the 5V pad. Alternatively, you can use solder instead the chip bead to switch between the 5V and 9V pads.
Motor choice: Avoid selecting motors with excessively high KV ratings, as motors above 20,000KV are prone to burn.
Betaflight Firmware and CLI
Download the firmware and CLI dump file
Reference link:
ESC Firmware
With BB51 ESC solution, F4 2-3S 20A AIO FC V1 is based on BLHeliSuite16714903 with Bluejay ESC firmware, it supports bidirectional D-shot and RPM filtering in Betaflight, offers 24KHz, 48KHz, and 96KHz fixed PWM frequency for options, and custom start-up melodies. F4 2-3S 20A AIO FC V1 default factory setting is 48KHz and it doesn’t recommend upgrading the 96KHz, or it might cause an error in the motor idle setting, not spinning when disarmed.
DO NOT flash the firmware with a shorter interval, otherwise, there will be a certain chance of stalling and burning the flight controller.
- ESC-Configurator: https://preview.esc-configurator.com/
- Download BLHeliSuite16714903
- Download the Bluejay ESC firmware. Please choose C_X_70.HEX
Serial ELRS 2.4G RX
Serial ELRS 2.4G RX uses the Crossfire serial protocol (CRSF protocol) to communicate between the receiver and the flight controller board. So the Serial ELRS 2.4G RX is available to support upgrading to ELRS V3 with no need to flash Betaflight flight controller firmware.
- Enter binding status by power on/off three times.
- Plugin and unplug the flight controller three times;
- Make sure the RX LED is doing a quick double blink, which indicates the receiver is in bind mode;
- Make sure the RF TX module or radio transmitter enters binding status, which sends out a binding pulse;
- If the receiver has a solid light, it's bound.
The Serial ELRS 2.4G RX can be updated via Wi-Fi or Betaflight serial passthrough. Here is the way to update the Serial ELRS 2.4G RX firmware through passthrough.
- Plug in your FC to your computer, but do NOT connect to betaflight configurator.
- Choose target "BETAFPV 2.4GHz AIO RX".
- Flash using the BetaflightPassthrough option in ExpressLRS Configurator.
How to flash firmware via Wi-Fi here.
Connecting External Devices
Please note that the board reserves two serial ports and a standard SBUS port, which is available for the external CRSF protocol receiver or GPS module, and SBUS protocol receiver. You can refer to the below picture.
Recommend Parts
- Drones: Pavo20 Pro II, Pavo20 Pro, Pavo Pico, HX115 SE Toothpick Drone
Package
- 1 * F4 2-3S 20A AIO FC V1
- 4 * M2*10 Machine Screw
- 4 * M2*10 Nylon Screw
- 4 * M2 Nuts
- 4 * Shock Absorbing Ball
- 4 * JST1.25mm Angle Socket
- 4 * JST1.25mm Straight Socket
- 1 * SH1.0 4Pin Adapter Cable
- 1 * Type-C to SH1.0 Adapter
- 1 * XT30 Power Cord
- 1 * Filter Capacitor
- 1 * 30mm Double-head VTX connector wire
- 1 * 60mm Single-head VTX connector wire
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