ScanDoc for Developers

J2534 PassThru is an SAE-standardized communication protocol that provides a unified interface between diagnostic software and vehicle electronic control units. It enables low-level access to automotive protocols: sending and receiving diagnostic messages, flashing ECUs, and performing security procedures.

The ScanDoc adapter implements the SAE J2534-1/2 standard (version 04.04) with proprietary extensions for protocols not covered by the standard, including DoIP (Diagnostics over IP).

• Supports all major diagnostic protocols: ISO 15765 (CAN), ISO 14230 (KWP2000), ISO 9141, J1850, TP2.0, and others.
• Compatible with dealer-level software: ODIS, Xentry, ISTA+, and other J2534-compatible applications.
• Libraries available for Windows, macOS, Linux, and Android.
• Nano ET is the first and only adapter on the market with J2534 support on Android.

J2534 specification and function reference ›

ELM327 is a widely adopted text-based AT-command protocol for OBD-II communication. It provides a simple interface for sending and receiving diagnostic commands. The protocol is supported by the vast majority of diagnostic applications and libraries.

The Nano ET implements ELM327 v2.3 with an extended command set that adds a DoIP (Diagnostics over IP) interface for Ethernet-based diagnostics of modern vehicles.

• Full compatibility with the ELM327 standard — works with existing applications without modification.
• Extended command set with DoIP support for modern vehicles.
• Easy integration — text-based AT commands over a serial interface (WiFi, BLE, or USB).
• Ideal for rapid prototyping and applications that do not require deep protocol-level control.

The ELM327 interface is available on the Nano ET. The other ScanDoc adapters use the J2534 PassThru protocol.

ELM327 specification and command reference ›