GEPRC ELRS DUAL 2.4G Diversity Receiver

GEPRC ELRS DUAL 2.4G Diversity receiver is a next-generation dual-antenna receiver system developed based on an open source project ExpressLRS. ExpressLRS features long range, low latency, and up to 1000 Hz refresh rate. The ELRS DUAL 2.4G Diversity receiver has two optimally positioned antennas for wider signal reception and more stable communication compared to conventional single-antenna systems. The TCXO used prevents frequency changes due to temperature fluctuations, and the telemetry transmission power reaches up to 100 mW.

Features:

• Compact size: 20 mm × 14 mm;
• Only 1.2 g weight;
• Wi-Fi software update;
• Open source ELRS remote control technology;
• Maximum 1000 Hz refresh rate;
• Two independent RF receiving circuits;
• TCXO ensures stable operation at high or low temperatures, does not cause loss of control during long-term operation;
• Integrated PA + LNA, telemetry power up to 100 mW.

Specification:

• Dimensions: 20 × 14 mm;
• Weight: 1.2 g (receiver only);
• Chips: ESP32-PICO-D4, SX1281;
• TCXO;
• Frequency band: 2.4 GHz ISM;
• Refresh rate: 25 Hz – 1000 Hz;
• Input voltage: 5 V;
• Antenna connector: Ipex1;
• Indicator: RGB light;
• Telemetry power (TLM): 20 dBm.

Scheme:

The correspondences of RGB light colors according to packet transmission frequency are shown in the figure below:

• F1000 and F500 are packet transmission frequencies in FLRC mode. This mode provides faster modulation and lower delay, but at the same time has a shorter signal reception range than the regular LoRa mode. This mode is perfect for racers.
• D500 and D250 are the packet transmission rates in DVDA (Deja Vu Diversity Aid) mode. This mode operates at the F1000 packet transmission rate of FLRC mode, but by sending the same data packet multiple times, it provides better connection stability in the presence of complex interference. D500 and D250 mean that the same packet is sent two and four times, respectively.

ELRS DUAL 2.4G Diversity receiver and flight controller (FC) connection diagram:

Open Betaflight Configurator, go to the Ports tab and enable the appropriate UART as Serial Rx (e.g. UART2 as shown below). Save the settings and reboot.

In the Configuration section, click Serial-based receiver in the Receiver panel and select CRSF.

Pairing:

The factory software version of the ELRS DUAL 2.4G Diversity receiver is above 3.x, so versions 3.x and 2.x are incompatible. Before pairing, the transmitter module software must be updated to 3.x or later.

• Turn the receiver on and off three times in a row, leaving a 1-second pause between cycles, to enter pairing mode.
• The RGB indicator will blink twice quickly, indicating that the receiver is in pairing mode.
• Put the remote control or transmitter module into bind mode. If the RGB indicator lights up steadily, pairing is successful.

Package:

1× ELRS DUAL 2.4G Diversity receiver;
2× antennas;
2× heat shrink tubing;
4× silicone cables;
1× 4-pin plug;
1× user manual.