mlRS MAVLink 2.4GHz Transmission Module Kit, mR24-30-TX
1. Product Summary
1.1. Product Description
The Matek mR24-30-TX mLRS 2.4 GHz Transmission Module Kit is a high-power MAVLink long-range transmitter designed for UAVs, fixed-wing aircraft, and FPV platforms requiring a combined RC link and telemetry. Running mLRS firmware on an STM32G431 MCU with an SX1281 LoRa RF core and a SKY65383-11 PA/LNA front-end, it supports output levels up to 30 dBm (~1 W). The kit includes a JR adapter board with Bluetooth for configuration, LED status indicators, a cooling fan for high-power operation, and IPEX→(RP)SMA pigtails for antenna flexibility.
1.2. Key Features
- mLRS (MAVLink Long-Range System) firmware on STM32G431.
- 2.4 GHz ISM band with SX1281 LoRa + TCXO RF stability.
- Configurable TX power steps: 13 / 20 / 24 / 27 / 30 dBm.
- SKY65383-11 PA/LNA RF front-end for high output and sensitive receive.
- JR-bay adapter with Bluetooth (HC-04), LED indicators, and bind/DFU button.
- Cooling fan activates at ≥ 500 mW output for thermal management.
- Multiple control/telemetry modes (e.g., CRSF/mBridge) for RC + MAVLink in one link.
- Includes IPEX MHF-1 → SMA and IPEX MHF-1 → RP-SMA pigtails.
- Wide input voltage range via adapter: 5–13 V DC.
- Status LEDs: Red/Green for link state, Blue for Bluetooth.
2. Technical Specifications
Table 2-1. mR24-30-TX Module Parameters
| Parameter | Specification |
|---|---|
| Firmware | mLRS (MAVLink Long-Range System) |
| MCU | STM32G431KB |
| RF Chipset | SX1281 LoRa with TCXO |
| PA/LNA Front-End | SKY65383-11 |
| Frequency Band | 2.4 GHz ISM |
| TX Power Levels | 13 / 20 / 24 / 27 / 30 dBm (≈1 W) |
| Antenna Connector | IPEX MHF-1 (kit includes IPEX→SMA & IPEX→RP-SMA) |
| Power Input (VIN) | 5–13 V DC via JR_PIN3 on adapter |
| Cooling | 5 V 25×25×10 mm fan (auto on ≥ 500 mW) |
| Indicators | Red/Green (link state), Blue (Bluetooth) |
| Config/Update | Bluetooth (app/Lua/CLI), DFU / STM32CubeProgrammer |
3. Kit Contents
- 1 × mR24-30-TX 2.4 GHz mLRS Transmitter Module
- 1 × JR-bay Adapter Board (Bluetooth + LEDs + Button + Fan header)
- 1 × 5 V Cooling Fan (25×25×10 mm) + mounting screws
- 1 × IPEX MHF-1 → SMA pigtail (≈5 cm)
- 1 × IPEX MHF-1 → RP-SMA pigtail (≈5 cm)
4. LED Status & Buttons
| Indicator / Control | State | Meaning |
|---|---|---|
| Red LED | Flashing ~2 Hz | No connection to radio / not linked |
| Green LED | Flashing ~1 Hz | Connected / link established |
| Red + Green | Alternating | Bind mode active |
| Blue LED | Solid/Flashing | Bluetooth power / activity |
| Button | Short press | Bind / mode as configured |
| Button | Long press | Enter DFU / firmware update mode |
5. Integration & Usage Notes
- Supply clean 5–13 V DC to the adapter’s VIN (JR_PIN3).
- Attach the provided IPEX→(RP)SMA pigtail and a suitable 2.4 GHz antenna before powering on.
- For outputs ≥ 500 mW (27–30 dBm), ensure the fan is installed and unobstructed for proper cooling.
- Configure via Bluetooth (mobile app / Lua / CLI) and/or USB DFU with STM32CubeProgrammer.
- Select desired link mode (e.g., CRSF/mBridge) and set telemetry/RC parameters per flight controller requirements.
- Observe local regulations for 2.4 GHz power limits and permitted usage.
6. Practical Summary
The mR24-30-TX is a professional-grade 2.4 GHz mLRS transmitter kit that unifies RC control and MAVLink telemetry with power levels up to 30 dBm. Its Bluetooth-enabled JR adapter, integrated fan control, and flexible antenna options make it easy to deploy on advanced UAV and FPV platforms that demand long-range, robust links and streamlined configuration.
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