On the verge of war between Long-range systems in FPV Industry, FrSky has released the FrSky R9 system to compete with other market players. Long-range is a new game and many are replacing their basic RF Modules or upgrading their radios to join this new game and set out to take FPV into another level. So what do we need? Reliable and great Receivers with S.bus out to match with the modern Flight controllers.

PWM? Yes, it is discontinued in the modern world of FPV. S.bus is what we need and FrSky R9 receivers have them. This article is about some FrSky R9 receivers that have S.bus output in a small size factor. So let’s get started.

FrSky R9 MM OTA Receiver

The 900MHz FrSky R9 MM-OTA receiver implements the ACCESS protocol and brings the user improved performance and features. The R9 MM-OTA supports wireless firmware updates over the air (OTA) making binding to receivers even easier and much simpler. As well as the convenience of checking the current receiver firmware version. The R9 MM’s compact form factor design is also carried over to the OTA version, and the R9 MM-OTA supports inverted S.Port as well.

 

Features at a Glance:

  • 915MHz (Non-LBT Version)/ 868MHz (LBT Version)
  • Mini size and super lightweight
  • Supports OTA firmware update
  • Supports firmware version check
  • S.Port enabled and support telemetry data transmission
    (Support F.Port, download firmware to support the function)
  • Inverted S.Port enabled
  • Low latency and high precision
  • With RSSI output in SBUS
  • Battery voltage detection supported
  • Detachable Ipex connector antenna

Specifications at a Glance:

  • Dimension: 16*10*2.8mm (L×W×H)
  • Weight: 0.7g (without antenna)
  • Number of Channels:
    Non-LBT Version: 4/16CH (Telemetry)
    LBT Version: 4/16CH (Telemetry) / 4/16CH (No Telemetry)
  • Operating Voltage Range: DC 3.5V – 10V
  • Operating Current: [email protected]
  • Operating Range: Up to 10km or above
  • Compatibility: R9M Lite/R9M/R9M 2019 with ACCST firmware
    R9M Lite/R9M Lite Pro/R9M 2019 with ACCESS firmware

FrSky R9 Mini OTA Receiver

The 900MHz FrSky R9 Mini-OTA receiver implements the ACCESS protocol and brings the user improved efficient performance and features. The R9 Mini-OTA supports wireless firmware updates over the air (OTA), the same as its predecessor making binding to receivers even easier. As well as the convenience of checking the current receiver firmware version. The R9 Mini’s compact form factor design is also carried over to the OTA version, and the R9 Mini-OTA supports redundancy function as well which unlocks more possibilities.

 

Features at a Glance:

  • 915MHz (Non-LBT Version) / 868MHz (LBT Version)
  • Mini size and super lightweight
  • Supports OTA firmware update
  • Supports firmware version check
  • S.Port enabled and support telemetry data transmission
    (Support F.Port, download firmware to support the function)
  • Supports redundancy function
  • Low latency and high precision
  • With RSSI output in SBUS
  • Battery voltage detection supported
  • Detachable Ipex connector antenna

Specifications at a Glance:

  • Dimension: 16*10*2.8mm (L×W×H)
  • Weight: 0.7g (without antenna)
  • Number of Channels:
    Non-LBT Version: 4/16CH (Telemetry)
    LBT Version: 4/16CH (Telemetry) / 4/16CH (No Telemetry)
  • Operating Voltage Range: DC 3.5V – 10V
  • Operating Current: [email protected]
  • Operating Range: Up to 10km or above
  • Compatibility: R9M Lite/R9M/R9M 2019 with ACCST firmware
    R9M Lite/R9M Lite Pro/R9M 2019 with ACCESS firmware

FrSky R9 MX Receiver

The FrSky R9 MX is the enhanced versions of the previous R9 MM/Mini series long-range capable receivers, equivalent in size and weight equipped with a robust detachable Ipex1 antenna connector for extremely small size applications.

 

The R9 MX takes features from the previous R9 Mini and R9 MM making it compatible with more external devices by providing an Inverted S.Port output which makes it more convenient for F4 flight controllers and supporting the redundancy function. Additionally, it retains soldering points to connect 4 PWM channels. The enhanced design proves to be more durable, and in conjunction with the latest ACCESS firmware, the two are now synchronized and we are able to unlock the true potential of the ACCESS protocol.

Features at a Glance:

  • ACCESS protocol and supports OTA functions
  • 900MHz/868MHz long-range with low latency
  • Enhanced and durable design
  • Support S.Port / F.Port (Configurable in OpenTX / FrOS menu)
  • With inverted S.Port outputs
  • Signal redundancy function
  • Detachable Ipex1 connector antenna

Specifications at a Glance:

  • Frequency: 868MHz / 915MHz
  • Dimension: 18*12*3.2mm
  • Weight: 3.2g
  • Numbers of Channel: 4 PWM / 16 SBUS (CH16 outputs RSSI)
  • Operating Voltage: DC 3.5V~10V
  • Operating Current: <[email protected]
  • Compatibility: R9M Lite/ R9M Lite Pro / R9M 2019 with ACCESS firmware

Conclusion

That is all about the FrSky R9 receivers and I hope this article has helped someone to understand much better about them. Let’s cover something else in another section.