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[Sticky] FrSky R9 MM-FC OMNIBUS F4 Fireworks V2 868MHz

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frsky x R9MM FC Firework f4 540x400

The FrSky 900MHz/868MHz  R9 MM-FC (OMNIBUS F4 Fireworks V2) uses the ICM20608 over SPI to produce stable flight performance. Integrated with the R9 MM receiver mounted on-board protection box, and the ICM20608 runs perfectly under 32k Gyro loop. Also onboard are a barometer and AB7456 OSD chip for the Betaflight integrated OSD.

The R9 MM-FC (OMNIBUS F4 Fireworks V2) supports 3-6s Lipo direct input, built-in hall Current Sensor and Power Filter as well. The on Board PDB is tweaked by using 12-Layer PCB design. There is only 0.2-0.5 mohm internal resistance from input to each output pad.


  • Tantalum Capacitors can be added to the board (not included)
  • Solder pads added for VTX and Camera Control (next to Video pads)
  • The orientation of IMU FPC optimized
  • Gyro ribbon cable redesigned to fit without extending outside the board
  • Added an 8v BEC and LC Filter for the camera and VTX power
  • This board now has 5 UART ports


  • STM32 F405 MCU, Runs Betaflight firmware (supported from v3.2)
  • FrSky R9 MM receiver in protection box
  • ICM20608 over SPI Bus in dampening box (optional MPU6000)
  • 30.5×30.5 mm mounting holes
  • Supports Lipo direct plug-in (3-6S)
  • Built-in sensor damper
  • Supports 5V 1A BEC output (Buck)
  • Supports 8V 1A BEC with LC filter output for the camera and VTX (Buck)
  • STM32 controls OSD chip over SPI in DMA mode (Betaflight OSD)
  • Built-in hall Current Sensor
  • Built-in Professional Level PDB
  • More caps to reduce power noise

All files relating to the R9 MM-FC OMNIBUS F4 Fireworks V2 including manuals and firmware updates can be found here:

Posted : 11/04/2019 12:46 pm