Navigon, TomTom, the iGPS360 and... debugging GPSSerial

Link for iPhone and iPod Touch users here

This is a post that describes how GPSSerial was debugged to fix the heading bug that appeared in Navigon and TomTom.

As you can imagine, it is very time-consuming to get on the road and do real-life GPS testing every time the code for GPSSerial is updated. As such I decided to record the output of the iGPS360 module to a file while driving my car on a route that was known to have heading problems in Navigon.

What you see in the above video is an in-door setup where the iPod Touch is connected through an interface board to my desktop computer. The desktop computer in turn plays back the on-the-road recorded GPS trace through the interface board. This setup is a huge time-saver when it comes to testing bug-fixes in the GPSSerial source code.

In the course of the debugging process, I also updated the iPhone Toolchain on the desktop PC (running cygwin) to firmware version 3.1.x as I first thought that the bug was related to the Toolchain version. This was quite an experience in itself: not without problem; although the instructions at Saurik's page are very good, they are not complete, and neither up-to-date (yet) for the 3.1.x firmware.

After having spent a lot of time on testing and debugging the code, all the work has finally paid off: the latest GPSSerial version is finally working correctly with Navigon. The incorrect-heading bug is now fixed and the red GPS bar does no longer appear when you are not moving.

You can download and install the latest GPSSerial version by following the instructions on the Orange Gadgets site here.

The new version should hopefully be available through Cydia soon as well.

Try it out and feel free to leave your feedback in the comments.

Enjoy! PmgR

Officially confirmed: iGPS360 works with firmware 3.1.2

This is a brief post to update everyone on the iGPS360 module and firmware 3.1.2.

As had already been reported by quite a few users, the iGPS360 works fine with the new 3.1.2 Apple firmware (thank you everyone, for bringing this confirming news early for everyone).

I have finally had some time myself to play around with an an iPhone 3G running firmware 3.1.2 (jailbroken by blackra1n and unlocked by blacksn0w) and I can confirm that the iGPS360 module works fine on the new firmware.

Maybe someone can also confirm that the module works on an iPod Touch 3G (I don't have one of those).

The FAQ and product description on the Orange Gadgets website has now also been updated with this information.

If you feel anything else needs to be updated or added to the website, please let me know.

iGPS360 Tip and Trick

If your iPhone or iPod Touch is no longer new and fresh out of the box, you might have noticed that the fit for accessories that you plug into dock connector becomes a bit loose over time (this is also the case for the iGPS360 module).

Today's post is a tip and trick to tighten up your iGPS360 module (and whatever other accessories or 30-pin USB cables you have). This seems to work very well.

Get a razor blade edge/corner or any other pointed thin and sharp blade edge, like one of those small utility knives or a Stanley blade.

On the dock connector on the module (or any other accessory), you can see a metal cover (see the photo above). The cover has eight slits in it (four on the top and four on bottom; not counting the two outer ones on the bottom). These eight slits create four metal tabs in the metal.

Over time when you plug the iGPS360 module (or any other accessory accessory) a lot in and out of your iPhone or iPod Touch, these tabs get pushed in and the female dock connector on your iPhone/iPod Touch also becomes a bit looser. As such the press fit of the module into the iPhone/iPod becomes looser.

In order to tighten the connection up again, stick the knife edge/point carefully a little bit under each of those four tabs and lift them up a tiny bit, see the above photo. Don't do it to much otherwise it is going to be really hard to get the module/acessory back into your iPhone/iPod. And just as a general warning, be careful no to break those tabs.

This trick will make the connection (very) tight again. Just make sure not to over-do it or break those tabs. You only need to move them back up a tiny bit. Don't make it too tight either. If it seems too tight, very carefully slide the accessory back into your iPhone/iPod very slowly, wiggling it slowly left and right until it is fully seated.

I have performed this trick on one of my older iGPS360 modules and my oldest 2G iPhone (which was a bit loose) and I have a nice and tight fit again now.

If this works for you, post your results :-)