DriverBridge

DriverBridge is a companion application for 32-bit J2534 drivers, including use from 64-bit Protohaund. It is included in the J2534 package and supports CAN adapter connections in CANopen and VAG modules. It is not needed for a normal Modbus RTU serial connection.

Setup

1. Install the adapter manufacturer's J2534 driver.
2. Install J2534 in Settings → Packages and restart when prompted.
3. Open Settings → Connections → Driver Bridge.
4. Click Start, then Refresh if needed. Check the Adapters list.
5. In Connections → Transport, select J2534, the adapter and CAN speed.

The Driver Bridge page appears when the component is available. The adapter list shows the device, library, driver state, and physical and logical connection states. An empty list means the bridge reported no available 32-bit adapters. A running bridge alone does not confirm that the physical device is connected.

Supported modes and observation limits are described under J2534.

Bridge controls

Control	Purpose
Start	Start the bridge
Restart	Restart the bridge
Stop	Stop the bridge and disable its automatic startup setting
Refresh	Refresh status and adapter information
State	Current bridge state
PID / Track ID	Identify the process and correlate technical logs

Stopping or restarting affects connections through the bridge. Finish using the adapter before these actions.

Startup options

Option	Behavior
Start automatically	Start with the application if the bridge was used in the previous session
Restart policy	Restart on failure permits recovery after an unexpected exit; Disabled disables it
Runtime mode	Interactive opens a window; Headless runs without a window
Use legacy presence probe	Open and close a device to detect its presence when the driver cannot enumerate devices

Use legacy presence probe calls the driver. If discovery is slow or problematic for an adapter, disable it and check again. No window does not mean the bridge has stopped: use State to check its status.