Any hints from the firmware that could make a software GP-E2 clone?

Started by ryebrye, October 22, 2012, 01:33:11 AM

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I'm interested in automatically geotagging, but less interested in spending $250 for a GPS unit with a USB connection. Does the GP-E2 do USB host or does the camera?

If the camera is the USB host, making something that would emulate the GP-E2 and send GPS info to the camera would be pretty easy - I have more than a few older android phones with good GPS receivers in them and functioning USB ports that I could use...

Or perhaps building an arduino-based alternative to the GP-E2 would be another idea.

Anyone know where in the firmware it shows the protocol used to talk to the GP-E2? 



I think the GP-E2 uses PTP to talk to the camera so it's acting as a host
EOS 1100D | EOS 650 (No, I didn't forget the D) | Ye Olde Canon EF Lenses ('87): 50 f/1.8 - 28 f/2.8 - 70-210 f/4 | EF-S 18-55 f/3.5-5.6 | Metz 36 AF-5


building an Arduino-based device that does PTP and has a GPS chip in it would be pretty easy - but the cost for a good GPS receiver + arduino etc would probably not make it super enticing unless you already had the parts from another project