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OBD-II UART | Hackaday
OBD2 16Pin to DB9 Serial Port Adapter Cable | Makerfabs
Car Code Scanner Super Mini Elm327 Bluetooth Obd2 2.1 Elm-327 Obdii Adapter For Android Torque With Nitroobd2/ecooobd2 - Code Readers & Scan Tools - AliExpress
Making Electronics: OBD-II USB adapter to Bluetooth adapter hack