DeviceTool.getHardwareId

Gets the hardware ID of this tool, or 0 if it's not known.

When non-zero, the identifier is unique for the given tool model, meaning that two identical tools will share the same hardware_id, but will have different serial numbers (see gdk.device_tool.DeviceTool.getSerial).

This is a more concrete (and device specific) method to identify a gdk.device_tool.DeviceTool than gdk.device_tool.DeviceTool.getToolType, as a tablet may support multiple devices with the same gdk.types.DeviceToolType, but different hardware identifiers.