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README
l0destar
l0destar.com A fully open-source vehicle tracker - open hardware and open software.
Inspired by the Geolink Opentracker and the Fortebit Polaris, the goal is to build something that will last: a reference design for the best possible vehicle tracker that anyone can fab, modify, and host. Hardware and software are completely open and maintained as a community project.
Status
Prototyping / design phase. The v2.1 layout worked on a bench, and v2.6 (CAN, K-line and micro), v3.0, v3.1, v3.2 and v3.3 have since been built and bench tested - see the test status table in each board's README. v3.4 is designed but not yet built or tested.
All boards before v3.3 have a serious defect in the K-wire circuit if the L wire is connected. If any of these prototypes are built the L wire should not be connected to the vehicle as if it was ever externally shorted to the 12V rail the l0destar device would be damaged. Luckily very few people are going to care at all about this ancient protocol and even fewer will ever need the L wire in normal use but it still bears mentioning as an indication that these are very much prototypes and there may be other undiscovered defects.
Disclaimer
This is a prototype, not a product. Nothing here is validated, qualified or certified, the parts lists are examples rather than a verified BOM, and any test results are my own unverified bench observations. All responsibility for anything built from it rests with the person building and installing it.
Before building, installing or relying on any of this, read the full disclaimer.
What it is
- Mission - the world's best fully open-source vehicle tracker, no profit motive. See
MISSION.md. - Goals - KiCad reference design, open enclosure CAD, open firmware and server, weeks of standby on a typical car battery, 1 Hz GNSS, LTE-M/NB-IoT, CAN + K-Line diagnostics, accelerometer-driven wake. Full list in
GOALS.md. - Technology choices - Nordic nRF9151 SiP (LTE-M/NB-IoT + GNSS), LT8609A buck, ASM330LHHX IMU, MCP2518FD + MAX33041 CAN, TJA1027T K-Line. Rationale and trade-offs in
TECHNOLOGY.md.
License
l0destar is multi-licensed by artifact type - permissive across the board:
| Artifact | License |
|---|---|
| Hardware design files | CERN-OHL-P-2.0 |
| Firmware | Apache-2.0 |
| Server-side software | Apache-2.0 |
| Documentation, enclosure CAD, media | CC-BY-4.0 |
Full text and rationale in LICENSE.md; license bodies in LICENSES/.
Contributing
Contributions are welcome. l0destar uses the Developer Certificate of Origin rather than a CLA - every commit must carry a Signed-off-by: trailer (git commit -s). See CONTRIBUTING.md for PR expectations.
Contact
- Bug reports and feature ideas: GitHub Issues
- Open-ended questions and design discussion: GitHub Discussions
- Direct contact: contact me
Contributors
371 commits
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Languages
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60.8%
C
18.5%
Python
16.0%
Shell
2.3%
JavaScript
1.5%
See what people are saying (1)
README
l0destar
l0destar.com A fully open-source vehicle tracker - open hardware and open software.
Inspired by the Geolink Opentracker and the Fortebit Polaris, the goal is to build something that will last: a reference design for the best possible vehicle tracker that anyone can fab, modify, and host. Hardware and software are completely open and maintained as a community project.
Status
Prototyping / design phase. The v2.1 layout worked on a bench, and v2.6 (CAN, K-line and micro), v3.0, v3.1, v3.2 and v3.3 have since been built and bench tested - see the test status table in each board's README. v3.4 is designed but not yet built or tested.
All boards before v3.3 have a serious defect in the K-wire circuit if the L wire is connected. If any of these prototypes are built the L wire should not be connected to the vehicle as if it was ever externally shorted to the 12V rail the l0destar device would be damaged. Luckily very few people are going to care at all about this ancient protocol and even fewer will ever need the L wire in normal use but it still bears mentioning as an indication that these are very much prototypes and there may be other undiscovered defects.
Disclaimer
This is a prototype, not a product. Nothing here is validated, qualified or certified, the parts lists are examples rather than a verified BOM, and any test results are my own unverified bench observations. All responsibility for anything built from it rests with the person building and installing it.
Before building, installing or relying on any of this, read the full disclaimer.
What it is
- Mission - the world's best fully open-source vehicle tracker, no profit motive. See
MISSION.md. - Goals - KiCad reference design, open enclosure CAD, open firmware and server, weeks of standby on a typical car battery, 1 Hz GNSS, LTE-M/NB-IoT, CAN + K-Line diagnostics, accelerometer-driven wake. Full list in
GOALS.md. - Technology choices - Nordic nRF9151 SiP (LTE-M/NB-IoT + GNSS), LT8609A buck, ASM330LHHX IMU, MCP2518FD + MAX33041 CAN, TJA1027T K-Line. Rationale and trade-offs in
TECHNOLOGY.md.
License
l0destar is multi-licensed by artifact type - permissive across the board:
| Artifact | License |
|---|---|
| Hardware design files | CERN-OHL-P-2.0 |
| Firmware | Apache-2.0 |
| Server-side software | Apache-2.0 |
| Documentation, enclosure CAD, media | CC-BY-4.0 |
Full text and rationale in LICENSE.md; license bodies in LICENSES/.
Contributing
Contributions are welcome. l0destar uses the Developer Certificate of Origin rather than a CLA - every commit must carry a Signed-off-by: trailer (git commit -s). See CONTRIBUTING.md for PR expectations.
Contact
- Bug reports and feature ideas: GitHub Issues
- Open-ended questions and design discussion: GitHub Discussions
- Direct contact: contact me
Similar repos
Contributors
371 commits
Languages
HTML
60.8%
C
18.5%
Python
16.0%
Shell
2.3%
JavaScript
1.5%