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I've found a number of apps for the iPhone/iPad that connect to ODB-II readers via WiFi, but unfortunately that means that it disables 3G and all the benefits of having a 3G device built into my dash.

I can't seem to find any apps that work via Bluetooth instead of WiFi.

Do any of you know if there is one available?

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Devices wanting to communicate data over Bluetooth with an iOS device must get an authentication coprocessor through Apple's MFi program, which anecdotally is not easy or cheap to join. Three I've found are Automatic, GoPoint BT1, and Xtool. I'm not sure they all use ELM327, particularly Automatic, though Automatic does have third party apps. (Can't leave as answer due to lack of rep.) – duozmo Sep 16 '15 at 3:05

ELM327 is not supported by iPhone as Apples Bluetooth Stack does not support the Bluetooth Serial protocol, the ELM327 is in it's simplest form a ODB to Serial Adapter with the serial data fed to a Bluetooth modem.

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I should have found this before buying the adapter. – sorin Nov 10 '11 at 22:03

Apple will not let you connect to the ELM 327 Bluetooth Interface as the manufacturer has not paid APPLE to support their bluetooth stack. Gotta Love EM'

There are plenty of apps for the Android that work well with the ELM 327 Bluetooth modules.

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What was the PIN for your ELM 327 module? – sorin Nov 11 '11 at 7:49
I ended up buying the ELM327 WiFi module and Rev2 – Chase Florell May 4 '12 at 1:24
up vote 3 down vote accepted

Well, It's not necessarily dealing with the ELM327, but this looks like a FANTASTIC solution.
Griffin CarTrip

No longer getting developed.

Apple is currently not allowing developers to use Bluetooth for this purpose. The only real connection is via Wifi.

My initial "assumption" was that if you're connected via Wifi, then your 3G data is disabled and therefore you cannot use data while using the OBD-II dongle. This information is wrong. If you put your data connection in proxy mode, your phone will still connect to data through 3G, even when connected to the dongle.

This works very well except for the minor issue whereby the gauges poll once every second as opposed to constantly polling in real time with what's actually happening. This makes for a choppy user experience, but it still works well.

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Was this link redirected or is just spam to a shop? – sorin Nov 10 '11 at 22:02
No, sorry. Looks like the CarTrip is currently OUT of development. If you look on their blog, they've said they're currently not working on it... they just pulled it right out of their site. – Chase Florell Nov 10 '11 at 22:04
Ended up buying the ELM327 WiFi module and Rev2 – Chase Florell May 4 '12 at 1:23

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