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What would be involved in taking the GPS data from a module and adding the data from a digital baro altitude sensor, then sending the info over a wireless digital RF link ?

Basically whats a reccomended starting point. I have a freind whos an electronics whiz but he has never done anything like this before. We just need to be pointed in the right direction. We have the RF link and the digital altitude sensor. Just need the GPS module and the micro to integrate the data.



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What I'd do is feed the GPS NMEA data into the microcontroller's serial port (lots of info about the data format on the net, just do a quick search), and replace the altitude field with the data obtained from the barometric sensor before sending the result through the RF link.. That would work transparently and allow using any GPS software on the other end.

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