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mLRS MAVLink 900MHz Receiver, mR900-22
Brand: Matek
Product Code: mR900-22
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mLRS MAVLink 900MHz Receiver, mR900-22
Description
1. Product Summary
1.1. Product Description
The Matek mR900-22 900MHz MAVLink Receiver is part of the open-source mLRS (MAVLink Long Range System) ecosystem, designed for UAVs, FPV drones, and professional telemetry applications. Operating in the 900MHz ISM band (868/915MHz depending on region), it combines long-range RC control and MAVLink telemetry in a compact and efficient form. The receiver features a LoRa SX126x transceiver and an STM32-based MCU for exceptional range, link stability, and low-latency communication.
1.2. Key Features
- Open-source mLRS firmware (MAVLink Long Range System).
- Operates in 900MHz ISM band (868/915MHz selectable).
- RF output power up to 22dBm (≈158mW).
- High-efficiency LoRa SX126x transceiver with integrated TCXO.
- Dual communication: MAVLink telemetry + RC control (CRSF/SBUS).
- Compact 24×15.5mm PCB with IPEXMHF-1 antenna connector.
- Wide input voltage range: 4–9VDC.
- Ultra-lightweight (~2.3g including antenna).
- LED indicators for connection and bind status.
- Firmware upgradable via DFU / STM32CubeProgrammer.
2. Technical Specifications
Table 2-1. mR900-22 System Specifications
| Parameter | Specification |
|---|---|
| Firmware | mLRS (MAVLink Long Range System) |
| MCU | STM32-based microcontroller (WLE5CC) |
| RF Chipset | SX126x LoRa transceiver with TCXO |
| Frequency Band | 900MHz ISM (868/915MHz depending on region) |
| RF Output Power | -9 / 0 / 10 / 20 / 22dBm (max ≈158mW) |
| Input Voltage | 4–9VDC |
| Communication Interfaces | UART1: MAVLink TX/RX UART2: RC output (CRSF / SBUS) |
| Antenna Connector | IPEX MHF-1 |
| PCB Dimensions | 24×15.5mm |
| Weight | ≈ 2.3g (with antenna) |
3. LED Indicators
| Indicator | State | Description |
|---|---|---|
| Red LED | Flashing ~2Hz | No connection / not bound |
| Green LED | Flashing ~1Hz | Link established |
| Red + Green (alternating) | Active | Binding mode enabled |
4. Applications
- UAVs Drones: Long-range bi-directional control and telemetry.
- Fixed-Wing Aircraft: Extended communication link for flight monitoring and control.
- FPV Platforms: Reliable MAVLink data stream for ground stations and OSD telemetry.
- Autonomous Systems: Perfect for telemetry-driven robotics and industrial UAVs.
5. Installation Configuration
- Connect power supply (4–9VDC) to the “V” and GND pads.
- Attach the antenna securely to the IPEX MHF-1 connector before powering on.
- Hold the bind button (~4seconds) until red green LEDs alternate to enter binding mode.
- Bind with a compatible mLRS 900MHz transmitter module (not ELRS or FrSky R9).
- Use mLRS Configurator or STM32CubeProgrammer for firmware flashing and updates.
- Configure UART ports on your flight controller for MAVLink telemetry and RC input mapping.
- Ensure antenna placement away from carbon fiber or metal interference for optimal range.
6. Notes Compatibility
- The 900MHz mLRS series (SX126x/WLE5) is not compatible with ELRS or FrSky R9 systems.
- Ensure regional compliance for 868/915MHz frequency bands.
- Use correct firmware target when flashing.
- For enhanced range, ensure clean power supply and proper antenna installation.
7. Practical Summary
The Matek mR900-22 Receiver delivers reliable long-range connectivity and integrated MAVLink telemetry over the 900MHz band. Featuring LoRa modulation, open-source firmware, and support for CRSF/SBUS RC output, it offers a stable, efficient communication link for professional UAV and FPV systems. Compact, lightweight, and easy to configure, the mR900-22 is an ideal choice for pilots and engineers requiring dependable MAVLink and RC integration in one receiver module.
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