Setup

Use mR24-30 as a TX module : tx-matek-mr24-30-g431kb-default-xxx

Use mR24-30 as a TX in SiKTelem mode : tx-matek-mr24-30-g431kb-siktelem-xxx

Modes & Link Rate

Firmware Flashing

Download STM32CubeProgrammer from ST website

• https://www.st.com/en/development-tools/stm32cubeprog.html

mLRS firmware:

• https://github.com/olliw42/mLRS/tree/v1.3/firmware/release-matek
• Targets:
  • RX Receiver: rx-matek-mr24-30-g431kb
  • TX module mode: tx-matek-mr24-30-g431kb-default
  • TX SiKtelem mode: tx-matek-mr24-30-g431kb-siktelem

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Make sure DFU driver has been installed. Check out “Install DFU Drivers” in this page

Connect the Receiver USB to computer while holding the boot button in.

1. Select USB
2. USB1 and click Refresh
3. Connect
4. select “Erasing & Programming”
5. Tick all sectors and click “erase selected sectors”
6. Browse firmware (hex or bin file) related to the hardware.
7. Click “Start Programming”
8. After programming, unplug USB and plug USB back in. If red LED blinks at 2Hz, the receiver is waiting for connecting with transmitter.

*** You can also flash it via INAV or BetaFlight configurator, load firmware local,  just like flashing a flight crontroller.

Com / CLI Commands

• Install serial_port_utility
• Firmware tx-matek-mr900-30-g431kb-default,  USB = COM/CLI, connect USB directly to computer, install STM VCP driver,  select STM32 COM port
• Firmware tx-matek-mr900-30-g431kb-siktelem, LT1/LR1 = COM/CLI,  connect USB-TTL module to LT1/LR1, select USB-TTL COM port
• more CLI commands details. 

• STM32G431KB,  mLRS firmware
• LoRa SX1281 with TCXO
• PA/LNA SKY68383-11
• RF Frequency: 2.4GHz ISM
• RF power: 13dBm(min) / 20dBm / 24dBm / 27dBm / 30dBm(1000mW)
• Antenna connector: IPEX MHF-1
• TX1/RX1: Bi-directional Serial MAVLink
• TX2: RC out(CRSF or SBUS)
• one buttom for DFU mode and Bind

• Power supply: 4.5-13V DC @ “V” Pad
• Power dissipation:  360mA@5V IN(50Hz, 30dbm)
• PCB Size: 28x21mm
• Weight: 4.5g w/ antenna

LED Status

• [Red flashing 2Hz], not connected to transmitter
• [Green flashing 1Hz], connected to transmitter
• [Red and Green alternately ], Binding mode enabled

Binding

• After powering on,  press the bind button (for ca. 4 seconds) on the receiver. When in bind mode, the green and red LEDs will blink alternatively with ca 2.5 Hz.
• https://github.com/olliw42/mLRS-docu/blob/master/docs/BINDING.md

Firmware

• mLRS https://github.com/olliw42/mLRS/tree/v1.3/firmware/release-matek
• Targets:
  • RX Receiver: rx-matek-mr24-30-g431kb
  • TX module mode: tx-matek-mr24-30-g431kb-default
  • TX SiKtelem mode: tx-matek-mr24-30-g431kb-siktelem

Tips

• mLRS Github  & Documentation
• mLRS Discord
• mLRS Facebook group
• If set RF power >=500mW, It is recommended to attach the heatsink to the bottom side of PCB. The gaps between fins can be used for mounting with M3 screws

Package Contents

• 1 x mR24-30
• 1 x IPEX MHF1 sleeve dipole antenna. 15cm
• 1 x Heatsink 20*20*6mm