After many researches and attempts to connect an Arduino with my car through the OBD-II connector and having some successful works of car dashboard gadget, I’ve finally made a kit which enables those who want to playing with Arduino and their cars to jump start quicky. I am maintaining an arduino library for the adapteras an open-source project. It provides Arduino developers an easy-to-use APIs to connect to and retrieve realtime data from a vehicle, which include: Vehicle speed Engine RPM T
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Keep Tabs On Your Car Without OBD-II
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Introducing the OBD-II UART Adapter for Arduino (with built-in MPU-6050) - Other Hardware Development - Arduino Forum
My home-brew Arduino OBD-II connection kit - Other Hardware Development - Arduino Forum
Advanced View Arduino Projects List -Use Arduino for Projects by WiseNaeem - Issuu
ECU Technical exploration
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This will be the most comprehensive
Koncha Tech: OBD-II Arduino Car Information Display
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Practical Arduino_ Cool Projects for Open Source Hardware ( PDFDrive ).pdf