BETAFPV SuperG Nano TX Module User Manual

Introduction

ExpressLRS is a new generation of open-source wireless remote control system dedicated to providing the best wireless link for FPV Racing. It is based on the Semtech SX127x/SX1280 LoRa hardware combined with an Espressif or STM32 Processor, offering long remote control distance, stable connection, low latency, high refresh rate, and flexible configuration.

The BETAFPV SuperG Nano TX module is a high-performance wireless remote control product developed based on ExpressLRS V3.3. It features the latest dual-antenna dual-transmitter diversity RF link architecture, enhancing remote control signal reliability and supporting advanced Gemini mode. Compared to traditional single-antenna, single-transmitter RF architectures, the SuperG Nano TX module provides stronger anti-interference performance and a more stable signal link, making it suitable for applications like racing, long-range flights, and aerial photography that demand high signal stability and low latency.

Github Project Link: https://github.com/ExpressLRS

Specifications

• Packet Rate: 50Hz/100Hz/150Hz/250Hz/333Hz/500Hz/D250/D500/F500/F1000
• RF Power: 25mW/50mW/100mW/250mW/500mW/1000mW
• Frequency band: 2.4GHz ISM
• Input Voltage: 7V~13V
• Power Consumption: 8V, 1A@1000mW, 1:128, Gemini mode
• Antenna Port: RP-SMA
• USB Port: Type-C
• USB Power Supply Range: 7-13V(2-3S)
• Built-in Cooling Fan Voltage: 5V

Module Overview

The module features an RP-SMA interface for antennas, an antenna indicator, a cooling fan, an RGB state indicator, two buttons (Button1 and Button2), and a USB Type-C interface. It also includes a pin header with connections for NC, 7V-13V, GND, and CRSF Serial Port.

Note: Please assemble the antenna before powering on the module. Otherwise, the PA chip may be damaged permanently.

Indicator Status

The receiver indicator status provides information about the module's connection and mode:

The packet rate corresponds to the RGB indicator color as shown below:

[Color bar showing packet rates from F1000 to 50Hz]

F1000 and F500 are packet rates supported by ELRS 2.4G under FLRC mode, offering lower latency and faster configuration, though with a shorter remote control distance, making them suitable for racing. D500 and D520 are packet rates under DVDA (Déjà Vu Diversity Aid) mode, which works under F1000 rate of FLRC mode. This mode repeatedly sends multiple identical packets in complex environments for a safer radio link. D500 sends the packet twice, and D250 sends it four times.

Transmitter Configuration

The SuperG Nano TX module uses the Crossfire serial data protocol (CRSF). Ensure your remote control's transmitter module interface supports CRSF signal output.

CRSF Protocol Setup (EdgeTX Example)

1. In the EdgeTX system, select "MODEL SEL" and enter the "SETUP" interface.
2. Turn off Internal RF (set to "OFF").
3. Turn on External RF and set the output mode to CRSF.
4. Connect the module correctly.

Settings Example:

SETUP
Internal RF Mode OFF
External RF Mode CRSF
Baudrate 921k
Status 500Hz OErr
Ch. Range CH1-16

Lua Script Configuration

Lua is a lightweight scripting language that can be embedded in radio transmitters for easy configuration management.

1. Download the elrsV3.lua script from the BETAFPV official website or the ExpressLRS configurator.
2. Save the elrsV3.lua file to the radio transmitter's SD Card in the Scripts/Tools folder.
3. On the EdgeTX system, long-press the "SYS" or "MENU" button to access the SD-HC CARD interface.
4. Select and run the elrsV3.lua script.

Successful Lua Script Interface:

BFPV NanoG 2G4 0/250 C

Packet Rate 250Hz(-108dbm)

Telem Ratio Std(1:64)

Switch Mode Wide

Antenna Mode Gemini

Model Match Off(ID: 0)

> TX Power(50mW)

> VTX Administrator

> WiFi Connectivity

> Backpack.

[BLE Joystick]

[Bind]

3.3.0 ISM2G4 b08b82

> Other Device

Lua Script Parameters:

Note: Learn more about Express LRS Lua: https://www.expresslrs.org/quick-start/transmitters/lua-howto/

Custom Button

The SuperG Nano TX module has two customizable buttons. Follow these steps:

1. Enable the module's WiFi or wait 60 seconds after power-on to enter WiFi mode. The RGB indicator will flash green slowly.
2. Connect to the WiFi network named "ExpressLRS TX" with the password "expresslrs".
3. Open a web browser and navigate to http://10.0.0.1 to access the custom button setting page.
4. In the "Action" column, select the desired custom function. In the "Press" and "Count" columns, choose the button press type (long press or short press) and the number of presses or duration.
5. Click "SAVE" to complete the configuration.

There are six settable functions for shortcut buttons, usable via long press or short press:

• Unused
• Increase Power Output
• Go to VTX Channel Menu
• Go to VTX Frequency Menu
• Send VTX Settings
• Enable WiFi
• Enter Binding Mode

Default Button Functions:

Bind

The default firmware of the SuperG Nano TX module is ExpressLRS V3.3.0, with no pre-set Binding Phrase. Ensure your receiver also uses V3.0.0 or above firmware and has no binding phrase set.

1. Put the receiver in a bound state and wait for connection.
2. Click "Bind" in the Lua script or use the set custom button to enter binding mode. If the indicator turns solid, the device has been bound successfully.

Note: If the receiver has firmware flashed with a binding phrase, the above method will not work. Set the same binding phrase on the transmitter module for auto-bind. It is recommended to separate the antennas for better receiving performance.

Quick Press the Key for Three Times to Enter the Binding Mode [Illustration of pressing Button 1 three times]

External Power

The SuperG Nano TX module consumes significant power at 500mW and above, which can shorten remote control usage time. Users can connect an external battery via an XT30-USB adapter cable for power. [Illustration of XT30-USB connection to a 2-3S battery and the module]

The module's power consumption is related to transmission power and telemetry ratio. For example, in Gemini mode, setting the telemetry ratio to 1:128 consumes 1000mA@8V, while 1:2 consumes half that amount. For high-power usage (500mW+), setting a higher telemetry ratio can reduce power consumption and extend usage time.

Note: When the remote control battery or external battery voltage is below 7V (2S) or 10.5V (3S), use Gemini mode at 500mW and 1W with caution. Insufficient power may cause the high-frequency head to restart, leading to disconnection and loss of control.

More Information

As the ExpressLRS project is actively updated, for more detailed information, FAQs, and the latest manuals, please visit the BETAFPV Support page (Technical Support -> ExpressLRS Radio Link).

https://support.betafpv.com/hc/en-us

• Newest user manual
• How to upgrade the firmware
• FAQ and troubleshooting