RadioMaster RP3 ELRS FPV Receiver 2.4GHz ExpressLRS Nano RX with 65mm UFL T Antenna Review (2026)

Core hardware and radio chipset

RadioMaster builds the RP3 around the ESP8285 microcontroller paired with a Texas Instruments SX1280 RF chip, the same general chipset family used across many current ExpressLRS receivers, and adds a Skyworks SE2431L front end that provides a low noise amplifier for better receive sensitivity along with a power amplifier that supports up to 100 milliwatts on the telemetry return link back to the transmitter. The receiver runs ExpressLRS firmware over its LoRa and FLRC 2.4GHz radio links, a combination the ELRS project has tuned specifically to balance long range against low latency for FPV control.

Antenna setup on this listing

This specific listing pairs the RP3 receiver with a single 65mm UFL T-style antenna rather than the dual-antenna diversity configuration RadioMaster sells on some other RP3 variants. A single antenna path keeps the build lighter and simpler to route inside a cramped micro frame, but it does not have the built-in redundancy of a true diversity receiver, which switches between two antennas to fall back on a clean signal if one antenna gets shadowed by the frame or a prop during a hard maneuver. Pilots who fly in radio-noisy environments or want maximum link robustness may prefer a diversity RP-series receiver instead.

Connectivity and setup

The RP3 communicates with a flight controller over the CRSF protocol, which is the same serial link most modern ELRS and Crossfire receivers use, so wiring into an existing flight stack is generally a two or three wire job once you have a spare UART. Firmware updates and configuration changes can be done over built-in WiFi directly on the bench without unplugging or removing the receiver from the quad, and binding to a transmitter can be done using a bind phrase rather than the older method of pressing a physical bind button, which is a convenience when a receiver is buried inside a tight frame stack.

Fit for micro and freestyle builds

At roughly 4.6 grams including its antennas, the nano form factor RP3 is aimed at whoop, micro, and small freestyle frames where every gram matters, and the compact PCB size makes it easier to tuck behind a flight controller or stack in a tight canopy. RadioMaster's documentation and firmware support for the RP-series is well established within the ExpressLRS community, so troubleshooting guides, wiring diagrams, and firmware updates are easy to find compared to some smaller receiver brands. The UFL antenna connector is a common failure point across nano receivers generally, and repeated hard crashes can work the connector loose over time, so it is worth inspecting the connection after a bad tumble. A small dab of hot glue over the connector after binding is a common precaution pilots take to keep it seated through everyday flying.

Who should buy this receiver

This RP3 variant fits pilots building a lightweight micro or small freestyle quad who want the well-documented ExpressLRS RadioMaster ecosystem without paying the small weight and space penalty of a dual-antenna diversity receiver. It is a reasonable everyday freestyle choice rather than a specialist long-range or race-day pick, since a single antenna path is inherently less resilient than diversity when the signal briefly drops out. Anyone who regularly flies at the edge of their range, or wants maximum reliability for competition, should look at one of RadioMaster's diversity RP-series receivers instead.

Frequently asked questions