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Aug 17, 2014, 05:30 PM
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bluetooth GPS hack

The long sought after bluetooth GPS hack was finally tested.

It was a complete failure.

There was a significant improvement in the open space, but lousier results everywhere else. That agrees with memories of flying it. Both measurement schemes gave the same distance. That test was handheld. There will be a brief experiment taping it to a hat before giving up.

There is a standard way of using bluetooth GPS with Android. It requires the GPS module to implement a full protocol stack on a microcontroller. Then it requires a new service to convert the bluetooth data to a mock location for all the other apps. The commercial modules are expensive, oversized pieces of plastic a corporation would use.

The test used a simple UART connection from GPS to bluetooth & 1000 lines of code to manage it. It used 200mA when unpaired & 100mA when paired. Bluetooth on Android requires reams of code for bare minimum functionality. It's no better than assembly language.
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