CAN Diagnostic Emulator

Simulate UDS and OBD-II style diagnostic commands, ECU power states, engine status and vehicle sensor values.

This is an educational software simulator. It does not communicate with a real vehicle, ECU, OBD-II adapter or CAN bus.

Send AT Command

Try AT+PWRON, then AT+ENGINEON, followed by AT+RDI=0123.

Ignition: OFF

Engine: OFF

Speed: 0 km/h

RPM: 0

Brake: 0 %

Gas Pedal: 0 %

AT+PWRON: Powers on the ECU. CAN: 0x10 01 → Response: 0x50 01

AT+ENGINEON: Starts the engine. CAN: 0x10 03 → Response: 0x50 03

AT+RDI=0123: Read speed and RPM. Request: 0x22 0123 → Response: 0x62 0123 [Speed] [RPM]

AT+RDI=0456: Read brake and gas pedal values. Request: 0x22 0456 → Response: 0x62 0456 [Brake] [Gas]

AT+RDI=0789: Read ignition and engine state. Request: 0x22 0789 → Response: 0x62 0789 [Ign] [Eng]

Negative response examples: 0x7F 22 11 ECU unavailable and 0x7F 22 33 engine unavailable.

The CfCbazar CAN Diagnostic Emulator is designed for experimenting with simplified UDS and OBD-II diagnostic concepts.

All commands and responses are simulated locally in your browser. No diagnostic command is transmitted to an actual vehicle.