i need help with c++ program, if either the airbag is triggered or the deceleration detected is greater than 5 Gs, we consider that an accident occurred. The vehicle decides to ask nearby by sendig SMS.

closed as too broad by Bob Cross May 22 '14 at 17:08

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • 3
    What exactly is your question ... Do you need the OBDII output, or what? – Pᴀᴜʟsᴛᴇʀ2 Apr 10 '14 at 0:07
  • Do you know the proper PID's? What are you struggling with exactly? – Captain Kenpachi Apr 10 '14 at 8:23
  • i need th OBD2 output that show airbag triggred – user4837 Apr 10 '14 at 10:29
  • 1
    This question appears to be off-topic because it is about programming – Gabriel Mongeon Apr 10 '14 at 15:05
  • 1
    @GabrielMongeon ... there has been other questions very similar to this which was answered. – Pᴀᴜʟsᴛᴇʀ2 Apr 10 '14 at 15:35

This will be specific to each vehicle Manufacturer and some specific to make and model. It's not covered in OBD-II and is propitiatory for each manufacturer. You might be able to detect by monitoring the CAN buss but again it will be specific to each manufacturer. You may be better off using your own G-force sensor to determine if there has been an accident, although you want the threshold to be much lower than 5 G's. The sensor type varies but all but rollover sensors measure G-force, and require two separate sensors to close at the same time, sometimes called an arming and discriminating sensor.

Not the answer you're looking for? Browse other questions tagged or ask your own question.