OBDii over smartphone via bluetooth

I wish to communicate OBDii information via bluetooth to a smartphone connected to another smartphone linked via bluetooth to a diagnostic computer. Can anyone suggest suitable hardware to achieve this?

Hi Mick,

What is happening on the smart phone side of things?

Hi Graham, I’m still investigating the smart phone concept, don’t have any answers yet.

Hi Mick,
If you were just looking to monitor the OBDII app on your phone from elsewhere, you may want to try using a Chromecast (Android) or AirPlay (Apple) device to mirror your screen to a tv screen/monitor.

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Hi Nick,

Thanks for your reply. What I am trying to achieve is to extract the raw data from the obd2 and transmit it via smart phone to a remote location where it can be fed into a diagnostic computer for analysis.

I have looked at some of your bluetooth modules and Sparkfun obd2 hacking modules but I am not sure if that is what I need. I accept that what I am trying to do may not be possible but I wont know if I don’t ask. Any assistance I can get with this concept will be greatly appreciated.

Best Regards,

Mick Devine.

Hi Mick,

I’m guessing this was the board you were looking at?
I had a look at the hookup guide for that, as it communicates through serial, you should just be able to connect a bluetooth mate to the serial pins on the chip.

Hi Nick,
Thanks for the info, I’ll order the boards and see how it goes.

Just had some thoughts, you may need something on your diagnostic computer’s end to receive the serial data from the device.
A pair of these (one on the PC and one on the OBDII board) may work. I’d suggest having a read through the board overview to get an idea of how it works and how to set it up.

Good luck!

Thanks Nick,
I had ordered the Bluetooth Mate SPX-14839 but have been informed that it is no longer available. Do you recommend the (HC-05) module alone or perhaps the Freetronics Bluetooth shield CEO4518?
Regards, Mick.

Hey Mick,

That’ll be dependant on what applications you require from your project. Both are great options but personally I’d use a Bluetooth Shield for this project as it’s more adaptable and Arduino shields are often reliable and well supported. Make sure to let us know how you go!

All the best with your project!

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