OBD-II splitter is used to connect several devices to CAN bus simultaniously. This is especially convenient for professionals who are engaged in the diagnosis and repairs of the ECU. Device is also used to sniff bus and diagnostic messages send by diag scanner to the ECU. Similar devices from China is based on wires, practice showed that this is not reliable. Our device is PCB based.
The device is selled as PCB and components. You have to solder them yourself. The plastic box is availble in 3D printer design.
This is an open project, details can be found on GitHub: https://github.com/airbagi/obd2splitter.