sunnypilot Installation Guide
Install sunnypilot on comma 3, 3X, or comma 4 with the correct branch URL, then use SunnyLink for easier remote configuration on comma 4.
Start clean — always factory reset before switching forks.
Switching from another fork?
⚠️ Uninstall Guide — read this first →Install Methods
Use the custom software URL on-device for normal installs, or SSH if you need the manual release-c3 path.
Factory reset your comma device if another fork was previously installed.
On the Choose Software screen, select Custom Software.
Enter the stable comma 3 / 3X install URL (no https:// needed on comma three). .
Follow the on-screen instructions to complete setup.
sunnypilot supports the comma 3 / 3X (stable release) and comma 4 (dev and staging branches). A stable release branch for comma 4 is coming soon.
- comma 3
- comma 3X
- comma 4 (MICI) — supported via dev and staging branches. Stable release branch is coming soon.
- comma 2 — not supported (deprecated)
comma 4 users: The comma 4 screen is smaller, making on-device settings harder to navigate. Use SunnyLink (sunnylink.ai) for remote configuration and settings sync.
Open Settings -> Software.
At Download, press CHECK.
At Target Branch, press SELECT.
Pick your desired branch and update.
Branch URLs
Use the branch that matches your hardware and risk tolerance.
| Branch | URL | Devices | For |
|---|---|---|---|
| release-c3 | comma 3 / 3X | Stable daily use | |
| staging-c3 | comma 3 / 3X | Pre-release testing | |
| dev-c3 | comma 3 / 3X | Development | |
| dev | comma 4 | comma 4 daily use (dev) | |
| staging | comma 4 | comma 4 pre-release testing |
Support and Safety
Install help, behavior notes, and validation guidance after setup.