MATEKSYS mLRS 900MHz series 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.

• https://github.com/olliw42/mLRS-docu/blob/master/docs/SX126x_SX127x_INCOMPATIBILITY.md

Experience unparalleled long-range connectivity with the Matek mR900-30 MAVLink long range system.

Equipped with MAVLink firmware and a 900 MHz LoRa band, the Matek mR900-22 receiver boasts 20 dBm RF power for optimal transmission strength. Stay connected with confidence and clarity.

Check out all our External Modules/ReceiversCollection, and the rest of ourMatek products!

Wiring:

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-matek-mr900-22-wle5cc-xxx

Connect the mR900-22 to USB-TTL module (e.g.CP210x, FTDI)

• mR900-22 RX2 USB-TTL module TX
• mR900-22 TX2 USB-TTL module RX
• mR900-22 V USB-TTL module 5V
• mR900-22 G USB-TTL module GND

Connect USB-TTL module to computer while holding the receiver boot button in.

1. SelectUART
2. Select theCOM port of USB-TTL module
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.

Specifications:

• STM32WLE5CC with TCXO, mLRS firmware
• RF Frequency: 900MHz (868MHz, 915MHz FCC)
• RF power: -9dBm(min) / 0dBm / 10dBm / 20dBm / 22dBm(158mW)
• Antenna connector: IPEX MHF-1
• TX2/RX2: Bi-directional Serial MAVLink
• TX1: RC out(CRSF or SBUS)
• 2x buttons for Boot mode and Bind

• Power supply: 4-9V DC @ V Pad
• Power dissipation: 67mA@5V IN(31Hz, 22dbm)
• PCB Size: 24 x 15.5 mm
• Weight: 2.3g w/ antenna

• Packing:
  • 1x mR900-22
  • 1x IPEX MHF1 dipole antenna. 8cm

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

• mLRShttps://github.com/olliw42/mLRS/tree/v1.3/firmware/release-matek
• Targets: rx-matek-mr900-22-wle5cc-xxx

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
• mR900-22 is NOT compatible with ELRS 900MHz / Frsky R9 series using the SX127x. They will not bind with each other.

Package Includes:

• 1 x mR900-22