How do I connect my OBD2 adapter?

Plug the adapter into your car's OBD2 port (usually under the dashboard near the steering wheel) and turn the ignition on. Having the engine running works best. For a Bluetooth adapter, open Odo, go to Garage → OBD II and start the scan. There's no need to pair it in iOS Settings first. After the first connection, Odo reconnects to it automatically on future drives. For a WiFi adapter, join the adapter's WiFi network in iOS Settings first, then connect from the same Garage → OBD II screen.