Matek MLRS MAVLink 900MHz Receiver, MR900-30
by Matek Systems

mR900-30 Long-Range 900MHz LoRa Module with mLRS Firmware

The mR900-30 is a high-performance 900MHz LoRa module, designed for reliable long-range communication in remote control and UAV applications. Powered by the STM32G431KB microcontroller and equipped with LoRa SX1262 chip with TCXO, this module delivers impressive RF power up to 30dBm (1000mW) on both 915MHz and 868MHz frequencies. The compact design includes an IPEX MHF-1 antenna connector, making it versatile for various setups.

With support for bi-directional Serial MAVLink and CRSF or SBUS RC outputs, the mR900-30 ensures seamless integration with your existing systems. The module also features a user-friendly interface with a single button for DFU mode and binding, making setup quick and easy.

Specifications:

• MCU: STM32G431KB, mLRS firmware
• LoRa Chip: SX1262 with TCXO
• Amplifier: PA/LNA SE2435L
• RF Frequency: 900MHz (868MHz, 915MHz FCC)
• RF Power:
  • 915MHz: 21dBm(min), 22dBm, 24dBm, 27dBm, 30dBm (1000mW)
  • 868MHz: 24dBm(min), 24dBm, 27dBm, 30dBm (1000mW)
• Antenna Connector: IPEX MHF-1
• Communication: TX1/RX1 Bi-directional Serial MAVLink, TX2 RC out (CRSF or SBUS)
• Power Supply: 4.5-13V DC @ “V” Pad
• Power Dissipation: 340mA @ 5V IN (31Hz, 30dBm)
• PCB Size: 29x21mm
• Weight: 5.3g with antenna

In the Box:

• 1x mR900-30 module
• 1x IPEX MHF1 dipole antenna (8cm)
• 1x Heatsink (20x20x6mm)

LED Status Indicators:

• Red flashing 2Hz: Not connected to transmitter
• Green flashing 1Hz: Connected to transmitter
• Red and Green alternating: Binding mode enabled

Binding Instructions: After powering on, press the bind button for approximately 4 seconds. The LEDs will blink alternately in red and green at 2.5 Hz when in binding mode.

Firmware:

• mLRS Firmware: mLRS GitHub Repository
• Targets:
  • RX Receiver: rx-matek-mr900-30-g431kb
  • TX module mode: tx-matek-mr900-30-g431kb-default
  • TX SiKtelem mode: tx-matek-mr900-30-g431kb-siktelem