J2534 support
Kepler speaks the SAE J2534 pass-thru standard, so it works with software that expects a standards-based interface — including using a manufacturer's own programming tools rather than locking you into one vendor's ecosystem. That makes it a practical, affordable way to handle ECU programming on GM vehicles without a dealer-only box.
Standalone diagnostics
Beyond programming, Kepler is built to work on its own. With three CAN channels, GM VPW, analog inputs, Bluetooth LE, and onboard microSD storage, it can sniff buses, capture live data, and log to a card or stream to a phone or PC — useful for chasing intermittent faults and keeping an older vehicle healthy.
Key capabilities
- SAE J2534 pass-thru for standards-based programming
- 3 CAN channels (to 2 Mb) with hardware ISO 15765-2
- GM VPW 1x/4x read & write, including block mode, plus GMLAN
- Bluetooth LE — works with both Android and Apple devices
- USB for PC connection; microSD for logging and programming files
- Analog-to-digital channels and status LEDs
Open hardware
Kepler started as an open-source design released to the community — the board files, firmware, and a J2534 driver are public. You can build your own, or get a finished board from us. Either way, it's a low-cost path to a capable interface.
