ShlkOfTheRa/scarab-osdPublic

MWOSD - UAV HUD

AI summary: A lightweight, C-based On-Screen Display (OSD) firmware for FPV drones supporting multiple flight controllers.

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CNo licenseCreated Mar 3, 2026Last push 7mo agoLatest release 2.0.0.1+-1 this month

Quick answers

What is scarab-osd?
A lightweight, C-based On-Screen Display (OSD) firmware for FPV drones supporting multiple flight controllers.
What does scarab-osd do?
Scarab-OSD (formerly MWOSD) is a highly versatile, open-source On-Screen Display (OSD) software designed for UAVs and FPV aircraft. It is written in lightweight C and is specifically engineered to run efficiently on resource-constrained MAX7456-based hardware modules. The firmware intercepts the analog video signal from a drone's camera and overlays critical real-time telemetry data, providing the pilot with a functional Heads-Up Display (HUD). It boasts extensive cross-compatibility, seamlessly communicating with a wide variety of popular flight controller software including Betaflight, Cleanflight, and MultiWii. Through its companion graphical configurator, pilots can extensively customize their display layout and font styles without needing to recompile the source code.
Who is scarab-osd for?
This firmware is built for FPV drone pilots, RC hobbyists, and UAV researchers who require a highly customizable, low-latency video telemetry overlay. Users need basic familiarity with Arduino IDE and serial communication.
How do I get started with scarab-osd?
git clone https://github.com/ShlkOfTheRa/scarab-osd.git
How popular is scarab-osd on GitHub?
ShlkOfTheRa/scarab-osd has 1,469 stars and 0 forks on GitHub.

Star history

since Jul 28, 2026
05001KJul 2026Aug 2026Sep 2026Oct 2026
1.5K stars as of Oct 4, 2026. Measured daily since Jul 28, 2026; GitHub no longer exposes earlier star timestamps.

Contribution activity

commits per day, last 52 weeks

What scarab-osd does

Scarab-OSD (formerly MWOSD) is a highly versatile, open-source On-Screen Display (OSD) software designed for UAVs and FPV aircraft. It is written in lightweight C and is specifically engineered to run efficiently on resource-constrained MAX7456-based hardware modules. The firmware intercepts the analog video signal from a drone's camera and overlays critical real-time telemetry data, providing the pilot with a functional Heads-Up Display (HUD). It boasts extensive cross-compatibility, seamlessly communicating with a wide variety of popular flight controller software including Betaflight, Cleanflight, and MultiWii. Through its companion graphical configurator, pilots can extensively customize their display layout and font styles without needing to recompile the source code.

This firmware is built for FPV drone pilots, RC hobbyists, and UAV researchers who require a highly customizable, low-latency video telemetry overlay. Users need basic familiarity with Arduino IDE and serial communication.

  • Real-Time Telemetry Overlay: Superimposes critical flight data directly onto the analog video feed without introducing noticeable video latency.
  • Broad Protocol Compatibility: Communicates seamlessly with major flight controller firmwares including Betaflight, Cleanflight, and legacy MultiWii.
  • Hardware Optimized Codebase: Written in lightweight C to execute flawlessly on inexpensive, resource-constrained MAX7456 OSD microcontrollers.
  • Graphical Configurator Application: Allows pilots to visually drag and drop OSD elements on a virtual screen and flash the configuration via USB.
  • Customizable Font Editor: Provides the ability to design and upload custom character sets to maximize readability in varying lighting conditions.
  • Comprehensive HUD Metrics: Calculates and displays artificial horizons, battery voltages, RSSI signal strength, and GPS coordinates dynamically.

Where teams use it

FPV Drone Racing

Pilots can monitor their battery voltage, current draw, and lap times directly in their goggles without taking their eyes off the track.

Long Range Fixed-Wing Flights

Operators can track GPS coordinates, altitude, and distance to home to ensure safe navigation beyond visual line of sight.

Legacy Hardware Rejuvenation

Hobbyists can revive older, unsupported MAX7456 OSD boards by flashing them with this modern, feature-rich firmware.

Custom Dashboard Design

Enthusiasts can use the graphical configurator to design a minimalist layout that displays only the essential information needed for cinematic flying.

Flight Controller Diagnostics

Builders can view PID profiles and sensor readouts on screen to tune their aircraft without connecting a laptop at the flying field.

Getting started: git clone https://github.com/ShlkOfTheRa/scarab-osd.git

README

master branch

Click here for our WIKI for the latest documentation

Current development repository status : Build Status

MWOSD NextGeneration OSD for UAV


An Multipurpose Open Source OSD software with support for:

  • BETAFLIGHT
  • CLEANFLIGHT
  • RACEFLIGHT
  • BASEFLIGHT
  • iNAV
  • KISS
  • APM
  • PX4
  • MULTIWII
  • dRonin
  • LIBREPILOT
  • HARIKIRI
  • TAULABS
  • DJI NAZA
  • FIXEDWING (BF/MWII)
MWOSD also provides support a number of other configurations:
  • Traditional GPS based OSD with full GPS info - Altitude , Direction, Distance, Speed etc.
  • Basic OSD - basic Volts / Amps / RSSI / Timer
  • Groundstation OSD for GS voltage / RSSI and Timer
  • NAZA - test only

Click here for GUI Configurator with easy install firmware


View on GitHub

Recent activity

commits and pull requests

Releases and announcements

17 total
  1. R2.0.0.12.0.0.1Mar 17, 20261 downloads

    # R2.0.0.1 We are pleased to announce the R2.0 release of MWOSD Note: This release requires a minimum GUI version of 2.0.0.0 Note: This release will default settings for versions prior to 2.0.0.0 - back up in existing version GUI before upgrading. The latest GUI is available here for download here: https://github.com/ShikOfTheRa/scarab-osd-gui/tree/master/MW_OSD_GUI ### 2.0.0.1 Summary of changes : * OSD - Additional Ardupilot flight modes * OSD - ADSB AGL/ASL reference choice for coexisting with different FC operation * OSD - Support to display airspeed in knots * OSD - Improve speed accuracy with mavlink * FIX - Bugfix for loss of OSD elements from rare UBLOX GPS error message handling ### 2.0.0.0 Summary of changes : * OSD - Antenna tracking support - Sentinel AAT support * OSD - Display element for battery % remaining * OSD - Display element for embedded VTX * OSD - Display element for average cell voltage * OSD - Display element for PID * OSD - ESC Telemetry OSD target * OSD - Support for full screen layout in PAL * OSD - PAL/NTSC autocam option without PAL position manipulation * OSD - Improved serial performance - especially mavlink * OSD - Im

  2. R2.0.0.02.0.0.0Mar 17, 2026224 downloads

    !!BETA TEST RELEASE!! We are pleased to announce the R2.0 release of MWOSD Note: This release requires a minimum GUI version of 2.0.0.0 Note: This release will default settings for versions prior to 2.0.0.0 - back up in existing version GUI before upgrading. The latest GUI is available here for download here: https://github.com/ShikOfTheRa/scarab-osd-gui/tree/master/MW_OSD_GUI ### 2.0.0.0 Summary of changes : * OSD - Antenna tracking support - Sentinel AAT support * OSD - Display element for battery % remaining * OSD - Display element for embedded VTX * OSD - Display element for average cell voltage * OSD - Display element for PID * OSD - ESC Telemetry OSD target * OSD - Support for full screen layout in PAL * OSD - PAL/NTSC autocam option without PAL position manipulation * OSD - Improved serial performance - especially mavlink * OSD - Improved VSYNC performance * OSD - VSYNC - automatically use if supporting hardware detected * OSD - Support for APM take off mode. TKOF (fixed wing) * OSD - co-ordinates in DDMMSS (config.h option) * OSD - Support for Mavlink alternative altitude source (config.h option) * GUI - support for all OSD changes * GUI - 1.9

  3. R1.9.2.01.9.2.0Mar 17, 2026pre-release

    Note: This release requires a minimum GUI version of 1.9.1.0 Note: This release will default settings for versions prior to 1.9.1.0 - back up first if required. Latest GUI is available here for download: https://github.com/ShikOfTheRa/scarab-osd-gui/tree/master/MW_OSD_GUI 1.9.2.0 Summary of changes : OSD - Support for KISS GPS RTH (1.3RC44) - xavier OSD - Support for KISS Turtle mode (1.3RC44) - xavier OSD - Support for KISS Messaging (1.3RC44) - xavier OSD - Support for KISS screen swithc from channel 8-10 - xavier OSD - Support for Ardupilot ADSB - real aircraft proximity awareness OSD - Support for Ardupilot Buddyflight OSD - Kiss VTX Power / Channel display OSD - Dual timer support OSD - Support for average battery cell display OSD - Support for Steele PDB OSD - Low memory warning added OSD - Setting 0 disables all alarm flashing - except voltage OSD - filter disabled by default - faster sensor updates are more popular OSD - support for canvasOSD - OSD runs purely from OSD OSD - LTM2ADSB protocol converter for buddyflight OSD - UBLOX2ADSB protocol converter for buddyflight BUG - LTM O frame support removed for FC that do not use it. BUG - LTM home set i

  4. R1.9.1.6 Test release1.9.1.6Mar 17, 2026pre-release

    Note: This release requires a minimum GUI version of 1.9.1.0 Note: This release will default settings for versions prior to 1.9.1.0 - back up first if required. Latest GUI is available here for download: https://github.com/ShikOfTheRa/scarab-osd-gui/tree/master/MW_OSD_GUI 1.9.1.6 Summary of changes : OSD - Support for Ardupilot ADSB - real aircraft proximity awareness OSD - Support for Ardupilot Buddyflight OSD - Kiss VTX Power / Channel display OSD - Dual timer support OSD - Support for average battery cell display OSD - Support for Steele PDB OSD - Low memory warning added GUI - DJI Naza available to flash from GUI 1.9.1.5 Summary of changes : OSD - Support for KISS GPS OSD - Support for KISS PID menu support OSD - Support for KISS Filter menu OSD - Support for KISS VTX menu OSD - Support for ARDUSUB OSD - Support for MAVLINK dual GPS / Baro altitude display OSD - Support for MAVLINK high resolution altitude OSD - Significantly improved Mavlink messages. Full length and human readable OSD - Different indicator icons for GPS, Baro and high resolution altitude values OSD - Bugfix for iNav airspeed display OSD - Bugfix for altitude display. GPS can be d

  5. R1.9.1.51.9.1.5Mar 17, 2026

    Note: This release requires a minimum GUI version of 1.9.1.0 Note: This release will default settings for versions prior to 1.9.1.0 - back up first if required. Latest GUI is available here for download: https://github.com/ShikOfTheRa/scarab-osd-gui/tree/master/MW_OSD_GUI 1.9.1.5 Summary of changes : OSD - Support for KISS GPS OSD - Support for KISS PID menu support OSD - Support for KISS Filter menu OSD - Support for KISS VTX menu OSD - Support for ARDUSUB OSD - Support for MAVLINK dual GPS / Baro altitude display OSD - Support for MAVLINK high resolution altitude OSD - Significantly improved Mavlink messages. Full length and human readable OSD - Different indicator icons for GPS, Baro and high resolution altitude values OSD - Bugfix for iNav airspeed display OSD - Bugfix for altitude display. GPS can be displayed independently of Baro altitude OSD - Developer debug memory display functioning for newer compiler versions 1.9.1.4 Summary of changes : OSD - Support for up to 12s main battery OSD - Support for APM VTOL OSD - Support for NMEA 9600 baud option pre-compiled OSD - Support for SBUS OSD - Bugfix for when selected reversed ahi pitch OSD - Bugfix

Code frequency

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last 52 weeks

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Commit volume by weekday and hour (UTC). Larger dots mean more commits.

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