OpenTracker
OpenTracker is an open-source, clean-room firmware for the original Polyend Tracker, written from behavioural specifications.
- Custom firmware
- Stable
- Medium brick risk
- Reversible
This project hasn't been claimed by its maintainer yet, so its details come from the community. Is it yours? Claim it
Before you start
- How hard is it?
- EasyCopy a file or use a web page. No extra software.
- What you need
- An SD card or USB stick
- Can it break my device?
- Small chance of trouble, with a way to recover.
- Can I undo it?
- Yes. You can go back to the official software.
Did it work for you?
Did OpenTracker 2.2.2 work on your Polyend Tracker?
No reports yet for 2.2.2.
One-tap reports from owners. Bricked reports are checked before they count.
Compatibility
Devices: Polyend Tracker.
No compatibility information yet.
Getting started
From the project's README ("Install"):
- Copy PolyendTrackerOTv221.ptf to /Firmware on the SD card. Keep the name; the bootloader only accepts 24-character names.
- Go to Config > Firmware update, select it and confirm. If the screen stays dark after the update, press the power button once.
Going back: keep the stock PolyendTracker1.9.2.ptf in /Firmware. Install it the same way, or put its file name into /Firmware/otrestore.txt and power-cycle. Keep only the image you want, plus stock, in /Firmware: the rear reset button installs a random .ptf from that folder.
Stack guard: 2.x stops a stack overflow with a reset and says "Restarted after a crash (stack overflow)" on the next boot. To run without the guard, put an empty /Firmware/otnoguard.txt on the card.
Note: projects saved by 2.x use the Mini's 16-track patterns. Stock firmware for the original Tracker reads only tracks 1–8 of those patterns (expected from the stock loader's rules; not yet confirmed on a stock unit).
Risk and recovery
- Brick risk
- Medium
- Reversible
- Yes
- Requires opening the device
- No
From the project's README ("Install"):
- Copy PolyendTrackerOTv221.ptf to /Firmware on the SD card. Keep the name; the bootloader only accepts 24-character names.
- Go to Config > Firmware update, select it and confirm. If the screen stays dark after the update, press the power button once.
Going back: keep the stock PolyendTracker1.9.2.ptf in /Firmware. Install it the same way, or put its file name into /Firmware/otrestore.txt and power-cycle. Keep only the image you want, plus stock, in /Firmware: the rear reset button installs a random .ptf from that folder.
Stack guard: 2.x stops a stack overflow with a reset and says "Restarted after a crash (stack overflow)" on the next boot. To run without the guard, put an empty /Firmware/otnoguard.txt on the card.
Note: projects saved by 2.x use the Mini's 16-track patterns. Stock firmware for the original Tracker reads only tracks 1–8 of those patterns (expected from the stock loader's rules; not yet confirmed on a stock unit).
Releases
| Version | Name | Released |
|---|---|---|
| 2.2.3-beta3 | —Pre-release | 29 October 2026 |
| 2.2.3-beta2 | —Pre-release | 28 October 2026 |
| 2.2.3-beta | —Pre-release | 27 October 2026 |
| 2.2.2 | —Latest | 26 October 2026 |
| 2.2.1-beta | —Pre-release | 24 October 2026 |
| 2.2.1 | — | 24 October 2026 |
| 2.1.2 | — | 23 October 2026 |
| 2.1.1 | — | 22 October 2026 |
| 2.1.0 | — | 21 October 2026 |
| 2.0.8-beta | —Pre-release | 20 October 2026 |
| 2.0.7 | — | 20 October 2026 |
| 2.0.7-beta | —Pre-release | 19 October 2026 |
| 2.0.6 | — | 19 October 2026 |
| 2.0.5 | — | 18 October 2026 |
| 2.0.3 | — | 18 October 2026 |
| 2.0.1 | — | 18 October 2026 |
| 1.9.8 | — | 18 October 2026 |
| 1.9.6 | — | 18 October 2026 |
| 1.9.4 | — | 17 October 2026 |
| 1.9.3 | — | 17 October 2026 |
Credits, license and support
- License
- Apache-2.0