Trouble hooking up Copernicus II breakout board

Newbie

I’m trying to hook up the Copernicus II GPS module, essentially with the same components as the

[SFE hookup guide (same antenna too), except using an Arduino Uno (via the 3.3v pin) instead of the FTDI board. And then using a short sketch which essentially copies serial input from the GPS to the serial monitor.

One time only (a week ago) I got expected NMEA output that looked like this:

$GPGGA,182853.00,3849.16540,N,07703.45057,W,12,1,02,1.00,00012,M,-033,M,*56

$GPVTG,265.8,T,276.3,M,002.9,N,005.4,K,A*20

But now I get output like this:

$GPGGA,0,00,*66

$GPVTG,N*30

(NB: in between I tried reconfiguring the GPS module a few times, including sending the NMEA sentence to reset the module to its factory default settings, which clears the position cache)

Okay, so that says to me that the antenna is not getting a fix, or that the antenna and/or GPS module is defective (which seems to be an issue with others).

Or possibly that that 3.3v Arduino pin can’t supply enough mA for both the GPS and antenna, as I’ve seen suggested elsewhere. So to test that I disconnected my jumper wires from Arduino pins 3.3v and GND and instead plugged them into a [url https://www.sparkfun.com/products/10804]Breadboard power supply stick outputting a steady 3.3v (verified with my DMM) but with the TX/RX pins still connected to the Arduino. When I do that I get output of… nothing. I also tried connecting XSTBY to VCC as suggested in the Copernicus II manual (although it worked fine w/o this when powered through Arduino) but that didn’t help. If I connect the VCC/GND wires back to the Arduino, I start getting NMEA output again (still no fix).

Why would that be? I feel like I’m missing something obvious.](https://learn.sparkfun.com/tutorials/copernicus-ii-hookup-guide)

Well, whatever it is, it’s apparently not obvious! Feel a bit better about that :slight_smile:

Have to ask: How long did you wait for a fix when NMEA is coming in? It can take several minutes for the board to warm up and figure out where it is from a cold start.

It might also take longer/never happen if the building you’re in obstructs the sky too much.

Have to ask: How long did you wait for a fix when NMEA is coming in? It can take several minutes for the board to warm up and figure out where it is from a cold start.

I probably made half a dozen attempts of 10-20 minutes each in my front yard with no surounding buildings taller than 2 stories and clear view of the sky.