Radiomaster RP3-H ExpressLRS 2.4GHz Nano Receiver

Designed specifically for use with the Nexus Helicopter Flybarless control unit and compatible with all CRSF/S.BUS enabled flight controllers the RP3-H ExpressLRS receiver comes with a built-in TCXO and an integrated housing design that makes the receiver tougher and ready to mount in modern helicopter frames. With the RP3-H receiver, you can get reliable, stable, and accurate signal reception, which enhances your flight experience and allows for superior performance even in demanding environments. The RP3-H also features an Ext-V telemetry input for compatibility with older ESCs that do not provide battery voltage telemetry via the control unit.

The RP3-H receiver uses the Skyworks SKY66112 power amplifier to increase telemetry performance, the PA provides up to 100mw of telemetry power, and antenna switching for antenna diversity. It is developed around the ESP8285 MCU and SX1281IMLTRT RF Chip, offering Lora and FLRC 2.4GHz RF links that provide incredible range and low latency. With Wifi built-in, firmware updates can be done on your craft without the need to remove the receiver.

Features:

• Perfect for helicopters and any application that needs a rugged cased serial receiver
• Plug'n'play solder free RP3-H ExpressLRS receivers compatible with NEXUS Heli flight controller
• Optimized PCB design for better heat dissipation
• LNA for better receiver range
• PA for better telemetry range
• Antenna Diversity for improved signal stability and range
• Built-in a TCXO (temperature compensated crystal oscillator)
• Automatically detects voltage telemetry of external battery voltage or receiver battery/ESC BEC voltage
• Compatible with all 2.4GHz ExpressLRS modules and transmitters with built-in 2.4GHz ExpressLRS

Specifications:

• Item: RP3-H ExpressLRS 2.4GHz Nano Receiver
• Type: ISM
• MCU: ESP8285
• RF Chip: SX1281
• Telemetry RF power: Max 100mW
• Antenna: 150mm 2.4GHz Antenna x2
• Frequency Range: 2.404 - 2.479 GHz
• Maximum receive refresh rate: 500Hz / F1000Hz
• Minimum receiver refresh rate: 25Hz
• Working voltage: DC 4.5 - 8.4V
• Battery voltage detection range: DC 4.0 - 35V
• Weight: 5.1g (Including two antenna)
• Dimension: 28mm*24mm*8mm
• Firmware Version: ExpressLRS v3.3.1 pre-installed
• FW Target: RadioMaster RP3-H Diversity 2400 RX
• Bus interface: CRSF/S.Bus

TCXO (temperature compensated crystal oscillator)

The TCXO ensures high stability and accuracy in frequency control, compensating for temperature variations. This results in consistent and reliable signal reception, even in extreme temperature conditions. It also reduces frequency drift over time, providing long-term frequency stability and preventing signal degradation. 

Click here to learn more about the TCXO.

Dimensions:

Radiomaster RP Series Receiver:

• RP1 ELRS 2.4ghz Nano Receiver
• RP2 ELRS 2.4ghz Nano Receiver
• RP3 ELRS 2.4ghz Nano Receiver
• RP4TD ELRS 2.4ghz Diversity Receiver
• RP3-H ELRS 2.4ghz Nano Receiver