RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver
The RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver brings a fast, dependable ExpressLRS link to builds where every millimetre and every gram counts. A TCXO keeps the signal steady in heat and frost, and the stiffer T antenna is made to last. Update and set it up over WiFi straight from your phone, solder four wires and you are back in the air in minutes.
RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver — An ExpressLRS Link That Fits Anywhere
The RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver is a nano 2.4GHz ExpressLRS receiver in the EU LBT version, for whoops, drones and fixed-wing models. It measures 13x11x3mm and weighs 2.2g with the antenna (approx. 0.5g for the receiver alone). It is built on an ESP8285 MCU and a Semtech SX1281 RF chip, and a TCXO oscillator keeps its frequency stable. The included T antenna on a 65mm cable plugs into the U.FL socket. Telemetry is sent back at 10mW, the maximum refresh rate is 500Hz / F1000Hz, and the receiver talks to the flight controller over CRSF on 5V power. According to the manufacturer's manual it ships with ExpressLRS 3.0, and the built-in WiFi lets you update and configure it from a web browser. The receiver and your transmitter must run the same major ELRS version and the same regulatory domain (LBT) to bind.
This is the EU LBT version. It binds with a 2.4GHz ExpressLRS transmitter or module that also runs EU LBT firmware, for example the RadioMaster Pocket LBT. If your transmitter runs FCC firmware, change the firmware regulatory domain on one of the devices before binding.
RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver Key Features
Stable Frequency
A TCXO oscillator compensates for the effect of temperature on frequency. Signal reception stays stable and accurate even in demanding conditions.
Low Weight
It measures 13x11x3mm and weighs 2.2g with the antenna. It fits even into a very tight frame and adds no unnecessary weight.
Antenna Included
A U.FL socket and a T antenna on a 65mm cable. The manufacturer has made the antenna stiffer for greater durability and performance.
Easy Soldering
The RX, TX, 5V and GND pads have been improved, so soldering the wires is quicker and more dependable.
WiFi Updates
The built-in WiFi lets you update the firmware and change the settings in a web browser on your computer or phone. No extra cables or programmer needed.
Fast Response
A low-latency RF module with a refresh rate of up to 500Hz / F1000Hz. The result is a very responsive feel on the sticks.
A Stable Signal Thanks to the TCXO
A TCXO (temperature-compensated crystal oscillator) gives high stability and accuracy of frequency control by compensating for temperature changes. Signal reception stays consistent and reliable even in extreme temperatures, and frequency drift over time is reduced, which prevents the signal from degrading.
A Stiffer, More Durable Antenna
The included T antenna on a 65mm cable is stiffer than before. According to the manufacturer this gives it greater durability and performance.
Solder Pads That Make Installation Easier
The 5V, TX, RX and GND pads have been improved and are designed for hassle-free soldering.
RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver Board Layout
- U.FL – antenna socket
- LED – status LED
- RX, TX, 5V, G – pads for connecting the flight controller
- BOOT – firmware update pad. Short it to GND with a metal object while powering on.
Connecting and Binding the RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver
Solder the receiver to a free UART on the flight controller: TX of the receiver to RX of the flight controller, RX of the receiver to TX of the flight controller, 5V to 5V and G to GND.
Setup in Betaflight
- On the Ports tab, enable Serial RX on the UART the receiver is connected to (e.g. UART2), then click Save and Reboot.
- On the Configuration tab, choose Serial-based receiver in the Receiver panel and select CRSF.
Binding
- Switch off your transmitter or radio.
- Plug the receiver power in and out three times.
- A quick double blink of the LED means the receiver is in binding mode.
- Switch on your transmitter and press [BIND] in the ExpressLRS Lua script.
- A solid LED means the receiver is bound.
Frequently asked questions - RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver
Most often the receiver and the transmitter run different firmware. Both must use the same major ExpressLRS version (for example 3.x on both) and the same regulatory domain. This receiver is the EU LBT version, so your transmitter or module also needs EU LBT firmware. If you use a binding phrase, it must be the same on both devices.
Power the receiver with the transmitter switched off and wait at least 60 seconds. When the LED blinks rapidly, the receiver is in WiFi mode. Connect to the ExpressLRS RX network (password expresslrs) and open 10.0.0.1 in your browser, where you can upload new firmware and change the settings. When the receiver is bound, you can also turn on its WiFi from the ExpressLRS Lua script.
A solid LED with the transmitter switched off means the receiver has started in bootloader mode. Some flight controllers pull the RX pad low at power-up, which puts the receiver into this mode. Connect the receiver to a different UART on the flight controller.
Yes. In ExpressLRS firmware you choose the receiver's serial protocol in the WebUI (Serial Protocol section) or in the Lua script (Other Devices, Protocol field). Besides CRSF you can select, for example, SBUS or SUMD.
RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver Dimensions
RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver Specification
Manufacturer | RadioMaster |
Model | RP1 V2 |
Firmware Region | EU LBT |
Frequency Range | 2.404-2.479GHz |
MCU | ESP8285 |
RF Chip | Semtech SX1281 |
Oscillator | TCXO |
Telemetry Power | 10mW |
Maximum Refresh Rate | 500Hz / F1000Hz |
Minimum Refresh Rate | 25Hz |
Protocol | CRSF |
Input Voltage | 5V |
Antenna | T antenna, 65mm cable, U.FL connector |
Weight | 2.2g (with antenna), approx. 0.5g (receiver only) |
Dimensions | 13x11x3mm |
Firmware | ExpressLRS 3.0 (factory, according to the manufacturer's manual) |
Firmware Target | RadioMaster RP1/2 2400 RX |
RadioMaster RP1 V2 ExpressLRS 2.4GHz Nano Receiver Package Includes
- 1x RadioMaster RP1 V2 Receiver
- 1x 65mm U.FL 2.4GHz T Antenna
- 1x 4-Wire Silicone Lead
- 3x Clear Heat Shrink Tube
- 1x User Manual
