Head Tracker v2.1
  • Head Tracker v2.1
    • HeadTracker v2.2
  • Getting Started
    • Hardware Required
    • Software Installation
      • Flashing Firmware
    • Wiring
      • Option 1- Bluetooth
        • Adding a FrSky BT Module
        • Checking Bluetooth Functionality?
      • Option 2 - Wired
        • Pulse Position Modulation (PPM)
          • Trainer Ports
        • Serial Bus (SBUS)
          • Radio Master TX16S Setup
          • FrSky Taranis X9D
      • Option 3 - Bridged
        • Radio Master TX16S Mk2
      • Analog Input
      • Digital Inputs
      • PPM Input
      • PWM Output
      • ELRS Setup
      • Flight Stick
    • Mounting
      • User Designed Cases
    • Structure of the Application
    • IMU, Calibration and Drift
    • Extended Servo Range
  • Settings
    • GUI Setup
      • Tilt / Roll / Pan
      • General
      • Output
      • Input
      • Bluetooth
      • PWM
      • Analog
      • Aux
  • Radio Setup
    • How to Edit Documentation
    • Open/Edge TX
      • Color Screen Radios
      • Black and White Radios
    • Jeti
    • Spektrum
      • NX
      • DX
        • DX18
    • Flysky
    • Frsky - Ethos
  • Videos
    • YouTube
  • Support
    • Discord Chat
    • Issues
    • Development
      • Firmware
        • Debugging
        • Arduino Nano 33 BLE
        • IMU Sensor Chip
      • GUI (Qt6)
      • GUI (Qt5, Depreciated)
      • Git Workflow and Actions
  • Links
    • Download
    • GitHub Page
    • RC Groups Forum
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On this page
  • Pulse Position Modulation (PPM)
  • Serial Bus (SBUS)

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  1. Settings
  2. GUI Setup

Output

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Last updated 2 years ago

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Pulse Position Modulation (PPM)

  • PPM Output

    • Pin you want the PPM output to be on

  • The Number of Channels

    • How many PPM channels to output. The latency is increased with every extra channel. Only use as many channels as you need.

  • Invert

    • Inverts the PPM Signal. An inverted signal is idle low.

  • Frame Length

    • This is the overall time the PPM signal is repeated at.

    • **NOTE** If you pick a low number of channels but leave the frame length too high it may be detected as a loss of signal. Lower the Frame length so it's just above the point you see "Warning! PPM Frame length possibly too short to support channel data" This will also cause the fastest update rate possible.

  • Sync Pulse

    • Synchronization pulse for every PPM channels data (300-400 us should work for most devices).

  • If you see a message "PPM data will not fit in frame", there is too many channels trying to be sent in the frame length you have specified. Increase the frame length. Note: The PPM will still be sent but the update rate becomes variable based on the content.

Serial Bus (SBUS)

The SBUS output is always enabled.

  • Update Rate

    • Sets the rate at which the SBUS should be updated

    If you are using SBUS on a remote board (Option 3), set the update rate to 80Hz which will match the Bluetooth update rate.

  • Inverts the SBUS Output Channel