I am currently working on trying to create an autonomous quadcopter project. I have been researching for a GPS and I can't seem to find one that can easily interface with Arduino yet be accurate enough for flight control/navigation. Does anyone have any suggestions on GPS modules that they have used? It would be nice to keep the GPS within a 3 meter accuracy. Thanks for any help or research tips.
Thanks for the reply Mark, I know I was looking at some around $40 and they really didn't give specifics on accuracy. I also looked at the Tiny GPS library and it said that it could read any NMEA. Are all GPS's NMEA compatible? I found some that said they can output in that and others did not specify.
Many GPS modules can use NMEA, check the specs. if that is what you need and it doesn't say, ask the supplier or find one that does.
GPS accuracy is largely dependent on "environmental" factors, (how many satellites can be seen, signal reflections, weather, etc.) so they are unlikely to give hard accuracy figures in the datasheet. Most modules will include an accuracy estimate in their output data though - i.e. it changes in real time. The choice between one module and another is more about features.