“Just posting a review and information onto anyone else working with this device, the UBlox Chip is superb in it, the board once you figure out the pin headers is excellent. However the supplied antenna is terrible.
I swapped to a High Gain 28db Active Ceramic GPS Navigation Antenna connected onto the u.FL connector available online for about £3 (which I am surprised Pimoroni don’t sell as they sell GPS & Ground Planes) and after reading online posts which were contributed to by the Sales and Marketing Director of Tallysman I am using a 100mm x 100mm x 6mm square of Aluminium as a ground plane and right now indoors on test I am getting solid signals from 20+ satellites and it established a 3D lock in 20 seconds, the supplied antenna connected the same way and in the same place wouldn’t connect to any satellites despite leaving it running overnight. I also suggest if you don’t have one to buy a deburring tool (about £5 from most tool suppliers) as its the easiest way to take any sharp edges off the aluminium ground plane and also has the effect of rounding the edges.”