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mLRS MAVLink 900MHz Receiver, mR900-30
Brand: Matek
Product Code: mR900-30
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mLRS MAVLink 900MHz Receiver, mR900-30
Description
1. Product Summary
1.1. Product Description
The Matek mR900-30 900MHz MAVLink Receiver is a high-power, long-range receiver designed to operate on the mLRS (MAVLink Long Range System) open-source firmware. Operating in the 900MHz ISM band (868/915MHz depending on region), it provides robust, low-latency communication for UAVs, FPV drones, and professional telemetry systems. With up to 30dBm (1W) RF output power, this receiver ensures maximum range and reliability for MAVLink and RC control links.
1.2. Key Features
- Runs on mLRS (MAVLink Long Range System) firmware.
- Powerful STM32G431KB MCU with LoRa SX1262 transceiver and TCXO.
- Supports 900MHz ISM band (868/915MHz region configurable).
- RF output power up to 30dBm (≈1000mW).
- Dual communication: MAVLink telemetry + RC output (CRSF/SBUS).
- Compact and lightweight: 29×21mm, ~5.3g.
- IPEXMHF-1 antenna connector for easy integration.
- Wide input voltage: 4.5–13VDC.
- Built-in power amplifier (PA) and low-noise amplifier (LNA) for extended range.
- LED indicators for connection and bind status.
- Firmware upgradeable via DFU / STM32CubeProgrammer.
2. Technical Specifications
Table 2-1. mR900-30 System Specifications
| Parameter | Specification |
|---|---|
| Firmware | mLRS (MAVLink Long Range System) |
| Processor | STM32G431KB |
| RF Chipset | LoRa SX1262 with TCXO |
| Frequency Band | 900MHz ISM (868/915MHz configurable) |
| RF Output Power | 21 / 22 / 24 / 27 / 30dBm (max ≈1W) |
| Input Voltage | 4.5–13VDC |
| Average Current | ~340mA @ 5V |
| Peak Current | ~850mA @ 5V (30dBm) |
| Interfaces | UART1: MAVLink TX/RX UART2: RC Output (CRSF / SBUS) |
| Antenna Connector | IPEX MHF-1 |
| PCB Dimensions | 29×21mm |
| Weight | ≈ 5.3g (with antenna) |
| Included Accessories | Dipole antenna (8cm), 20×20×6mm heatsink |
3. LED Indicators
| Indicator | State | Description |
|---|---|---|
| Red LED | Flashing ~2Hz | No connection / not bound |
| Green LED | Flashing ~1Hz | Linked and connected |
| Red + Green (alternating) | Active | Binding mode enabled |
4. Applications
- UAVs Drones: Long-range telemetry and RC link for professional platforms.
- Fixed-Wing Aircraft: Reliable link for control and telemetry monitoring.
- FPV Systems: Stable communication for long-distance FPV builds.
- Autonomous Systems: MAVLink data streaming for ground control and navigation.
5. Installation Configuration
- Connect regulated power (4.5–13VDC) to “V” and GND pads.
- Always attach the antenna before powering on the receiver.
- Press and hold the bind button for ~4seconds to enter binding mode.
- Bind with a compatible mLRS 900MHz transmitter module (not ELRS or FrSky R9).
- For high output power (25–30dBm), ensure good airflow or attach the included heatsink.
- Use mLRS Configurator or STM32CubeProgrammer for firmware updates.
- Configure UART ports in your flight controller for MAVLink and RC signal routing.
6. Compatibility Warnings
- The 900MHz mLRS series (SX126x/WLE5) is not compatible with ELRS or FrSky R9 systems.
- Ensure compliance with local frequency regulations (868MHz / 915MHz).
- Always use the correct firmware target.
- Provide stable power and secure antenna connection to prevent damage at high TX power.
7. Practical Summary
The Matek mR900-30 Receiver is a professional-grade long-range receiver operating on mLRS firmware. It offers integrated MAVLink telemetry and RC control via CRSF or SBUS, powered by a high-performance STM32 microcontroller and LoRa SX1262 transceiver. With up to 30dBm of output power, excellent noise immunity, and compact design, it is ideal for UAVs, fixed-wing, and FPV systems demanding maximum range and reliability.
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