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
Specifications
- mR900-30
- STM32G431KB, mLRS firmware
- LoRa SX1262 with TCXO
- PA/LNA SKY68383-11
- 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 to SMA
- mRx-Tx Adapter
- Built-in HC-04 Bluetooth module
- Built-in 5V fan controller, running if output power>=500mW
- TX2: RC IN(CRSF)
- one buttom for DFU mode and Bind
- Red and Green LED for mLRS status
- Blue LED for Bluetooth status
- Power supply: 5-13V DC @ JR_PIN3 (VIN)
- Packing:
- 1x mR900-30-TX,
- 1x IPEX MHF1 to SMA adapter cable 5cm,
- 1x IPEX MHF1 to RP-SMA adapter cable 5cm
- 1x 5V Fan (25*25*10mm) and some screws
- no SMA antenna & 3D printed Case packed
- Downloads:
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
- Target: tx-matek-mr900-30-g431kb-default
Tips
- mLRS Github & Documentation
- mLRS Discord
- mLRS Facebook group
- MATEKSYS mLRS 900MHz series are NOT compatible with ELRS 900MHz & Frsky R9 series using the SX127x. They will not bind with each other.
Routing and layout
Firmware flashing
lua
Resellers