OpenVCU_

The open-source, hardware-agnostic Vehicle Control Unit architecture for EV conversions and DIY builders.

For too long, EV builders have been locked into expensive, proprietary control units or forced to write bespoke state machines from scratch for every build. OpenVCU changes that by decoupling the core safety and drive logic from the physical hardware.

Modular Architecture

OpenVCU utilizes a strict "Library Type" approach. You select your microcontroller, pick your inverter, and compile only the modules you need.

• openvcu-core: The central brain. It handles the PRND state machine, pre-charge sequencing, torque mapping, and critical safety interlocks (IMD, crash switches) without knowing what hardware it's running on.
• Hardware Abstraction Layer (HAL): The bridge. Repositories like vcu-hal-teensy translate the core's generic commands into specific pin states, ADC reads, and native CAN bus transmissions.
• Component Drivers: Drop-in C++ modules containing CAN databases and control logic for specific hardware (e.g., Tesla LDU, Nissan Leaf inverters, Orion BMS).
• openCCU: An integrated Charge Control Unit module handling J1772 PWM and CCS/CHAdeMO fast charging handshakes.

Hardware Platforms

Build your VCU using readily available Industrial/Integrated Computer Platforms (ICP). Our initial roadmap targets the most accessible hardware in the maker community before expanding to automotive-grade microcontrollers.

Join the Grid

OpenVCU is maintained by the community, for the community. Whether you are an embedded C++ developer, a CAN bus reverse-engineer, or an EV builder willing to test hardware, we need your input.