Product overview
The RadioMaster XR3 Nano Multi-Frequency Antenna Diversity ExpressLRS Receiver provides an ExpressLRS radio control link using LoRa technology. Its hardware combines an ESP32C3 MCU with a Semtech LR1121 transceiver and a Skyworks RFX2401C incorporating an LNA, PA and antenna switching for diversity reception. The receiver operates on either 2.4GHz or Sub-G 900MHz, with 100mw telemetry power. It accepts DC 4.5 - 8.4V and weighs 1.3g without antennas. Receive refresh rates extend from a minimum of 25Hz to a maximum of DK500Hz / K1000Hz.
Built-in Wi-Fi supports configuration and firmware updates, while a WebUI provides access to settings from a PC or mobile device. ExpressLRS v3.5.1 comes pre-installed. The XR3 includes CRSF and UART bus interfaces, two IPEX-1 RF connectors and castled pads for soldering. Each package supplies the receiver, two T antennas, one CRSF wire, three heat-shrinkable tubes and a manual card. Antenna packages include 2.4GHz, 900Mhz or Dual-band types; the Dual-band option allows switching between the two bands without changing antennas.
