BETAFPV ELRS Nano Receiver

Diagram

The schematic of the 2.4G version of the Nano receiver is as shown below.

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

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.

Configuration and linking

The connection between the ELRS Nano receiver and the FC board is shown below.

Enable the appropriate UART (e.g. UART3 below) as Serial Rx in the Ports tab of the Betaflight Configurator.

The Nano receiver can enter pairing state after powering on/off three times.

• Turn the nano receiver on and off three times;
• Make sure the LED blinks twice quickly – this means the receiver is in pairing mode;
• If the receiver light is on continuously, it is paired.