But as you know the SoftwareSerial is quite slow or better it does
need a lot of power and that slows the Arduino down. I got some
experience in this. I do now parse the Gps sentence at 5hz on the
UART so the Hardware Serial on pin 0. I think as your program grows
Software Serial is going to be a problem.
And at 5hz the Software Serial is relay struggling getting the
data and parse them...
Geko