RadioMaster XR3 User Manual

2.4
GHZ
u.Fl
bind
RX TX
RX TX
SPECIFICATIONS
•Item: XR3 Nano Multi-Frequency Antenna
Diversity ExpressLRS Receiver
•Type: ISM2.4, FCC915
•MCU: ESP32C3
•RF Chip: LR1121
•RF connector: IPEX-1 X 2
•Antenna: 2x T-Antenna (Either 2.4GHz, 900Mhz or
Dual-band depending on selected package)
•Frequency Range: 2.4GHz / Sub-G 900MHz
[ISM 2.4GHz / FCC915 ]
•Maximum receive refresh rate: DK500Hz / K1000Hz
•Minimum receiver refresh rate: 25Hz
•Working voltage: DC 5.0 - 12.6v
•Weight: 1.3g (without antenna)
•Dimension: 22mm * 15mm * 4mm
•Firmware Version: ExpressLRS v3.5.1 pre-installed
•Bus interface 1: CRSF
•Bus interface 2: UART
INCLUDES
1 * XR3 Nano Multi-Frequency Antenna Diversity
ExpressLRS Receiver
2 * T Antenna (Either 2.4GHz, 900Mhz or Dual-band
depending on selected package)
1 * CRSF Wire
3 * Heat-Shrinkable Tube
1 * Manual Card
DEFAULT FIRMWARE
RadioMaster XR3 2.4/900 Diversity RX
For more information, please visit the ELRS website:
https://www.expresslrs.org/2.0/
TOP
u.fl
LR1121
2419
480311
−
5V
5V gnd
CONFIGURATION
Identifier
USB VCP
UART1
UART2
Open Betaflight Configurator, go to Ports tab and enable the corresponding
UART as a Serial RX (e.g. UART2 as shown above)Save and Restart.
Receiver
Serial (via UART)
•
The UART for the rec eiver must be s et to 'Serial Rx' (in the Ports tab)
• Select the correc t data format from the drop-down, below:
CRSF
On the Configuration tab, click on Serial-based receiver on the Receiver
panel, and select CRSF.
TRADITIONAL BINDING
Binding Phrase field must be uncommented in Device options on the RX.
1. Power OFF your transmitter/radio.
2. Plug in and unplug your receiver 3 times.
3. Make sure the LED is doing a quick double blink, which indicates
the receiver is in bind mode.
4. Power ON your transmitter/radio and use the [BIND] button
on the ExpressLRS Lua script, which sends out a binding pulse.
5. If the receiver has a solid light, it's bound!
XR3 Receiver User Manual
BOTTOM
15mm
40.000
MHZ
−
5V TX RX
YL320
Au1E
SKY
3373
2401C
7076
UH2251
TX2 RX2
Configuration/MSP Serial RX
115200
115200
115200
Receiver Mode
Serial Receiver Provider
1.3
GRAMS