CurtP said:
Twice a minute isn't enough to use for routing - your application will have to constantly send requests for a position. Most setups get a broadcast once a second.However, the solution HcRUL is working on sounds like it will be using an application to emulate NEMA broadcasts derived from the bus, not directly from the receiver. So the question remains - does the MINI receiver broadcast standard NEMA or something proprietary? I have serious doubts that the MINI receiver can broadcast to two devices simultaneously so even if you can tap into the receiver, more than likely you'll have to choose between either the MINI's satnav or the device you want to use. HcRUL's project is probably the best bet provided it is a solution that can work for you.
I agree that 2 times a minute would not be good enough for position navigation, but it will work well enough for my purposes. Regarding talking to two devices, depending on the interface it is simply a function of buffering. Since my application only requires listening it is rather a simple matter to buffer the outputs to handle multiple inputs, so I would not have to choose between applications. Actually I have a solution, that uses a separate GPS receiver, but it requires the receiver to see the sky and I want to build this guy into the guts of the car. I expect to have completion of the self contained version done by the end of the month, time permitting.
However access to serial output of NEMA $GPRMC sentences direct or derived using the SatNav System's better antenna placement and higher front end sensitivity would give a higher reliability factor that I would prefer.
HcRUL's help has been appreciated, and I am also interested in his project as well.