Bluetooth with Pixhawk is a snap. But just like every other bit of Pixhawk functionality, an add-on module needs to be purchased. We picked up the one shown as follows:
Of course, we had to alter the cable (just as we did before) because the cable included with this module is for the old-style plugs. We connected our Bluetooth module to the Telem 1 port as shown in the following figure:
Now, it's just a matter of binding our Android device's Bluetooth to the Pixhawk's Bluetooth. Just power on your Pixhawk and bind using the same method you would for any Bluetooth device. The software to control Pixhawk from a mobile device is called DroidPlanner 2. It's free!
We're not quite there yet, but if you're curious on how to get a Pixhawk vehicle to follow you using DroidPlanner 2, it's easy! Just click on the Follow button, and set the radius you'd like the rover to stay within. Of course, you can ignore the altitude attribute (as this is a ground vehicle...