JHEMCU RP4-TD ExpressLRS 2.4GHz True Diversity Receiver

The JHEMCU RP4-TD is a 2.4GHz ExpressLRS true diversity receiver built for pilots who push their hardware in challenging RF environments. Unlike standard receivers with antenna switching, a true diversity receiver features two completely independent RF chains. This allows the flight controller to actively evaluate and use the strongest signal, significantly reducing failsafes caused by multipathing in abandoned buildings, dense forests, or long-range flights.

Key features

• True diversity architecture with dual independent RF modules for maximum link stability.
• Powered by an ESP32 MCU, supporting advanced ExpressLRS features including Gemini mode.
• Dual IPEX1 connectors allow for independent antenna placement to eliminate polarisation cross-fade.
• Built-in Wi-Fi for straightforward over-the-air (OTA) firmware flashing and configuration.

Specifications

• MCU: ESP32-PICO-D4
• RF Chip: 2x SX1281
• Oscillator: TCXO, shared by both RF chains
• Frequency Band: 2.4GHz ISM
• Telemetry Power: Up to 100mW
• Antenna Connector: 2x IPEX1 (U.FL)
• Input Voltage: 4.5-5V DC
• Current draw: 120-200 mA
• Receiver Protocol: CRSF
• Dimensions: 13.5 x 19.5 mm
• Weight: 1.05 g (without antennas)

For the best possible RF link, mount the two included antennas perpendicularly (at a 90-degree angle to one another) on your frame. This ensures that at least one antenna remains optimally aligned with your transmitter regardless of the drone's orientation.