Matek mR900-22 mLRS (MAVLink long range system) firmware 22dBm RF power 900MHz Receiver
Product details
| Management number | 236149637 | Release Date | 2026/07/09 | List Price | US$9.20 | Model Number | 236149637 | ||
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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.
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/Receivers Collection, and the rest of our Matek products!
Wiring:
Modes & Link Rate
Firmware Flashing:
Download STM32CubeProgrammer from ST website
mLRS firmware:
- https://github.com/olliw42/mLRS/tree/v1.3/firmware/release-matek
- Targets: rx-matek-mr900-22-wle5cc-xxx
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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.
- Select UART
- Select the COM port of USB-TTL module
- Connect
- select “Erasing & Programming”
- Tick all sectors and click “erase selected sectors”
- Browse firmware (hex or bin file) related to the hardware.
- Click “Start Programming”
- 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
- mLRS https://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
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