“It works, but the documentation is poor and misleading. Instead of the documentation-suggested GPSD_OPTIONS"/dev/ttyUSB0" I had to use the actual serial port options GPSD_OPTIONS="-n -D 3 -b -s 115200"”
“I have a Pi 5 that I take in my backpack for ecological surveys - avoids all the frustration of poor/no signal out in the countryside. I decided to add a GPS receiver so I could automatically record gridrefs as I went along. First attempt was with a USB plugin style, no names mentioned, but it was a disaster. Even standing on top of a hill in clear view of the sky it struggled to get a fix. So I decided to try this device as a last throw of the dice.
Wow! What a difference! It seems to be able to see satellites everywhere, often using over 20 to fix my position. So far it has never failed on any terrain, in any habitat. Very pleased I took the chance. It also has a decent 1PPS signal that gpsd and ntpd use to keep the time bang on. Just as well because I forgot to by the battery for this Pi.
Only one very small gripe - I would like to buy another antenna for when its not in my backpack.”
“I bought this to experiment with creating a stratum 1 NTP server, using a Raspberry Pi 4. The board comes with a GPS antenna on a 3 metre cable, and a SMA adapter to connect it. The optional battery - a ML1220 - is not included and is difficult to obtain in the UK; I only found 1 supplier and had to buy 2 which shipped from France and cost nearly £15.
The board and antenna are very good. From plugging in to finishing the necessary software installation took less than half an hour. When the antenna is situated inside my garage, cgps tells me it can use around 4 satellites and takes around 5 minutes to lock onto those. Moving the antenna to the window sill results in around 12 satellites and a lock established in a few seconds. I have finally mounted the antenna outside in a small plastic box on a pole such that it clears the roof and has a good sky view. Now it locks onto around 24 satellites virtually immediately (I'm seeing mainly GPS, GLONASS, and SBAS with the very occasional Galileo).
TL;DR? Excellent board!”
