ELRS 915 MHz True Diversity Receiver with Dual Antennas

An ExpressLRS receiver for the 915 MHz band with true diversity: two separate RF chains, each with its own antenna, so the receiver always uses the stronger signal. The sub-GHz link suits long-range FPV quads, fixed-wing aircraft and other builds where range and signal penetration matter more than the highest packet rates.

Key features

• TCXO crystal oscillator keeps the frequency stable across temperature swings
• Telemetry output up to 100 mW (20 dBm) for a stronger return link
• RGB LED shows packet-rate and link status
• Firmware updates over Wi-Fi through the ELRS web interface
• IPEX1 (U.FL) antenna connectors; runs from a 5 V supply

Specifications

• Protocol: ExpressLRS (ELRS)
• Band: 915 MHz ISM
• Diversity: True diversity, dual RF chains
• Oscillator: TCXO
• Telemetry power: up to 100 mW (20 dBm)
• Input voltage: 5 V DC
• Antenna connector: IPEX1 (U.FL)
• Size: 20 × 14 mm
• Weight: approx. 1.2 g (receiver only)

It binds only to a 900 MHz ELRS transmitter or module, not a 2.4 GHz one, and both ends should run the same ELRS major version. Mount the two antennas at right angles to each other and connect the receiver to a free flight-controller UART using CRSF.