Matek MLRS MavLink 900MHz MRR900-30 Receiver
Description
Matek MLRS MavLink 900MHz MRR900-30 Receiver
High-performance 900MHz transmitter module for mLRS systems, featuring the SX1262 LoRa chip and STM32G431KB MCU. Offers selectable RF output up to 30dBm (1W), integrated Bluetooth, a 5V fan controller, and compact design with JR bay compatibility.
Warning
MATEKSYS mLRS 900MHz series using SX126x/STM32WLE5 LoRa chip are NOT compatible with ELRS 900MHz / Frsky R9 series using the SX127x. They will not bind with each other.
LoRa chip SX126x(e.g. mR900-30, E22) and STM32WLE5xx(e.g. mR900-22, WIO-E5, E77) are compatible with each other.
Specifications
- STM32G431KB, mLRS firmware
- LoRa SX1262 with TCXO
- PA/LNA SE2435L
- RF Frequency: 900MHz (868MHz, 915MHz FCC)
- 915MHz RF power: 21dBm(min) / 22dBm / 24dBm / 27dBm / 30dBm(1000mW)
- 868MHz RF power: 24dBm(min) / 24dBm / 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: Average 340mA/Peak 850mA@5V IN(31Hz, 30dbm)
- PCB Size: 29x21mm
- Weight: 5.3g w/ antenna
Includes
- 1x mR900-30
- 1x IPEX MHF1 dipole antenna. 8cm
- 1x Heatsink 20*20*6mm
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/main/firmware/pre-release-stm32
- 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
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
- MATEKSYS mLRS 900MHz series are NOT compatible with ELRS 900MHz & Frsky R9 series using the SX127x. They will not bind with each other.
Additional information
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