Have you tried reading the GPS in a terminal program?
According to the manual, it should be outputting the following:
NMEA V3.0 Protocol
Its output signal level is TTL: 4800 bps (default), 8 bit data, 1 stop bit and no parity. It supports
the following NMEA-0183
Messages: GGA, GLL, GSA, GSV, RMC and VTG.
Log the data coming from the GPS in your terminal program and look for the GLL message. The data string that you should be looking for would look like this:
$GPGLL, 3723.2475, N, 12158.3416, W, 161229.487, A*2C
If you're not seeing that line in the data capture from the GPS with valid lat/long data, then the GPS may be defective.
If you see the data okay in the terminal program, then there may be an issue with the serial port you have it set as. Try changing which serial port it shows up as. This is probably something you can change/set in the driver.
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.
—Cpt. Mal Reynolds, Serenity (edited)
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