OpenC3 COSMOS 5.4.2 - Modern, Production Ready, Command and Control

Welcome to OpenC3 COSMOS 5.4.2!

Patch Release 2

Scripts Now Can List Set Overrides and Warn if Running with Telemetry Overrides Fixed Regression in Minio Console Command Only Targets Are Now Supported Added a force option to cleanup to bypass the are you sure prompt

All Pull Requests in this Release

  • Script overrides by @jmthomas in #450
  • Minio console working by @jmthomas in #453
  • Handle command only target by @ryanmelt in #455

Prerequisites: Docker - Running OpenC3 requires a working Docker or Podman installation. Typically Docker Desktop on Windows / Mac. Plain Docker or Podman also works on linux. We actively develop and run with Docker Desktop on Mac/Windows, and Linux on Raspberry Pi, so if you have any issues on another platform, please let us know by submitting a ticket!

Minimum Resources allocated to Docker: 4GB RAM, 1 CPU, 80GB Disk Recommended Resources allocated to Docker: 16GB RAM, 2+ CPUs, 100GB Disk Also requires docker compose version 1.27+

To Run:

  • git clone cosmos-myproject
  • cd cosmos-myproject
  • Run Linux/Mac: ./ run
  • Run Windows: openc3.bat run
  • Connect a web browser to http://localhost:2900/
  • Have fun running OpenC3 COSMOS!

Please see our documentation at

Try it out and let us know what you think! Please submit any issues as Github tickets, or any generic feedback to


Full Changelog: Changelog