RadioMaster XR1 Nano Multi-Frequency ExpressLRS Receiver

The RadioMaster XR1 Nano is a versatile, ultra-compact ExpressLRS receiver measuring just 20 x 13mm. Its third-generation Semtech LR1121 transceiver runs on either 2.4GHz or Sub-GHz 900MHz – choose the band with the antenna – giving strong range and sensitivity in a tiny, 1g package. Built-in Wi-Fi makes configuration and firmware updates easy through the WebUI.

Key features

• One receiver for 2.4GHz or Sub-GHz 900MHz ExpressLRS
• Semtech LR1121 transceiver, ESP32-C3 MCU
• 100mW telemetry power
• Supports DK500Hz / K1000Hz packet rates
• Secondary UART port and castellated pads for easy soldering
• Built-in Wi-Fi for WebUI setup and updates
• Swap the antenna later to change band – no new receiver needed

Specifications

Compatibility

• 2.4GHz: binds to any ELRS 2.4GHz radio (Pocket, T8L, TX16S MK3 etc.).
• 900MHz: needs a 900MHz-capable ELRS transmitter - GX12, TX16S MK3, TX15 900MHz version or the Nomad module.
• In India: the licence-free sub-GHz band is 865-867MHz. Flash radio and receiver to the ExpressLRS IN866 regulatory domain to use 900MHz; FCC 915MHz firmware is for the USA. 2.4GHz needs no change.
• Wiring: 4 wires to an FC UART (RX to TX, TX to RX), 5V, GND. Serial RX, CRSF.

Works with (available at AeroFlow)

• RadioMaster GX12 Dual-Band radio (2.4GHz and 900MHz)
• RadioMaster Nomad Dual 1W module
• RadioMaster TX16S MK3

In the box

• 1x XR1 Nano Multi-Frequency ExpressLRS receiver
• 1x T antenna
• 1x CRSF wire
• 3x heat-shrink tube
• 1x manual card