BETAFPV ELRS Nano TX Module

Features:

• BETAFPV Nano RF TX module is based on the ExpressLRS project, an open source RC connector for RC. The goal of the ExpressLRS project is to achieve the best possible communication performance in terms of speed, latency, and range. As a result, ExpressLRS is one of the fastest RC connectors while providing a long operating range.

Specification:

• Manufacturer: BETAFPV;
• Model: ELRS Nano TX Module;
• RF output power: 100 mW/250 mW/500 mW;
• Frequency versions: (Nano RF module 2.4G version): 2.4 GHz ISM;
• Input voltage: 5V~12V;
• USB port: type-C connector.

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Diagram

The BETAFPV Nano RF module is compatible with radio transmitters that have a nano module slot (also called a Lite module slot, e.g. Frsky Taranis X-Lite, Frsky Taranis X9D Lite, TBS Tango 2).

The manufacturer recommends updating TX modules and receivers to the first major version V1.0.0. And following them in the future.

1. The TX module and receiver must be of the same ELRS version, otherwise pairing will fail.

2. TX module CANNOT support updating via WiFi. Please use ExpressLRS Configurator to update the software.

ExpressLRS is based on Semtech Lora SX127x or SX1280 hardware for RX and TX respectively. It aims to achieve the best possible communication performance in terms of speed, latency and range. At 900 MHz, a maximum rate of 200 Hz is supported. At 2.4 GHz, a staggering 500 Hz is currently supported using a custom OpenTX design. This makes ExpressLRS one of the fastest RC links while still providing long-range performance.

Basic configuration

ExpressLRS uses the Crossfire serial protocol (also known as CRSF protocol) to communicate between the radio and the Nano TX module. Therefore, make sure that your radio supports the CRSF serial protocol. We will use the radio with the OpenTX system to demonstrate how to set up the CRSF protocol and LUA script. To set this up, go to the model settings in the OpenTX system and disable Internal RF in the MODEL SETUP tab. Then enable External RF and select CRSF as the protocol.

ExpressLRS uses the OpenTX LUA script to control the TX module, such as pairing or setting it up. Using the LUA script, pilots can check and set some of the Nano RF TX module configurations.

Briefly pressing the module button will enter pairing mode.

Note: When entering the pairing state, the LED will not flash. The module will exit the pairing state after 5 seconds automatically. Short press 3 times in succession to pair.

RF TX module output power and LED indication as shown below.

LED color	RF output power
Blue	100mW
Violet	250mW
Red	500mW

Package:

1x BETAFPV ELRS Nano TX module;
1x BETAFPV Moxon antenna;
1x Nano TX module user manual.

Warning: Please install the antenna before turning on the device. Otherwise, the PA chip of the Nano TX module will be permanently damaged!

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BETAFPV ELRS Nano Receiver

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