FV-31 Cypher Wiki

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Welcome to the Flex Innovations - FV-31 Cypher Wiki

FV-31 Cypher

Aircraft Info

Manuals and Documents

Product Information


CAUTION: You must disconnect all motors, or securely restrain your Cypher when making and/or testing configuration changes

Configuration Tools for Betaflight - Notes and Links

Various FV-31 Cypher FLEXF3 settings can be edited using a BetaFlight Configuration Tool. We use the following ones. Only one configurator install is needed. Multiple links to multiple platforms and versions are provided below.
Betaflight Configurator
  • BetaFlight Configurator For Windows PC (Typically a Windows 7, 8, or 10 PC will use the Asset with name "betaflight-configurator-installer_<version>_win32.exe"). Works via Micro USB cable. Versions for Mac OS X and Linux may also be available, though Flex does not test or support these versions.
  • Speedy Bee Betaflight App for Android. Works via Bluetooth or Micro USB cable (Micro USB requires OTG adapter for most devices)
  • Speedy Bee Betaflight App for iOS (Apple Iphone and Ipad). Works via Bluetooth.
    • Search for Speedy Bee at the App Store Last Flex tested version: 1.2.8
    • Speedy Bee and Betaflight Configurator interfaces are nearly identical. Common instructions can be used for both platforms.


General tips on using and troubleshooting your configurator can be found on its Welcome and Documentation & Support pages

  • You have two choices to connect your configurator's device to your Cypher
    • The provided Bluetooth Dongle plugs into the white connector next to the USB connector
      • Plug in the dongle then power-up your Cypher with a flight battery.
      • Launch the Speedy Bee App and hit the 'Start Scanning' button. Connect to the Flex BT device.
      • Settings will load automatically
      • There should be no need to go to your devices 'Bluetooth Settings'. The BLE Dongle should simply work from the APP.
    • The provided USB Cable connects your Cypher's FLEXF3 to your device or PC.
      • Launch your Configurator, Plug in the cable, Hit connect
      • Additional power to the Cypher should not be required to make adjustments (powered via USB)

Use a Configuration Tool to Set or Reset the Angle/Six Axis Level

NOTE: The wing leveling six axis mode is named ANGLE mode in Betaflight lingo.
  • Place your Cypher on a level surface. Check that wings are level. You may want to shim the nosewheel up 2-5mm to set a more positive angle. (The angle relates to trim speed and can be set to taste).
  • Connect to your configuration tool and navigate to the Setup page.
  • With the Cypher level per above, click the Calibrate Accelerometer button.
  • Note the settings are now zeroed out. You are finished. Disconnect.

Troubleshoot ARMING Difficulties

  • Click this link to see notes on trouble shooting including a complete list of Prevention Flag Meanings
  • Review notes at link above for Betaflight 3.5
  • Note your Cypher's Arming Disable Flags using the Betaflight Configurator on the Setup page in the Info box at right.
  • Some common (beep code) Examples:
    • (2) FAILSAFE - Rx signal indicates Failsafe
    • (3) RXLOSS - No valid Rx signal found - Check Tx and Rx on and bound and connected
    • (7) THROTTLE - Throttle too high - lower throttle
    • (8) ANGLE - Cypher must be level within 25 degrees to arm
    • (13) CLI - CLI mode is active - Exit CLI and/or Disconnect configurator
    • (17) MSP - Connected to configurator - Disconnect

Entire Betaflight Wiki here for reference

  • Click this link for the Betaflight Wiki
  • Note that FV-31 Cypher code is based on Betaflight version 3.5. It is unique code, and it is not possible to build it with the 'generic source code'.
  • Note that the FLEXF3 Board/PCBA is hardware specifically developed by Flex Innovations for the FV-31 Cypher.

Enabling Telemetry

Optional Electronic Adjustments



CAUTION: You must disconnect all motors, or securely restrain your Cypher when making and/or testing configuration changes