“Awesome little hat. Only loses one star as the instructions in the datasheet weren't up to date for 4b.
Note BAUD rate for serial link is 115200. Couldn't get /dev/ttys0 to work so had to disable bluetooth to use /dev/ttyAMA0.
Give the hat time to train a signal from a cold start (5-15 mins!) before expecting sensible data.”
“You may need to find a good tutorial: I note also that this only worked for me on 32 bit Raspberry PI OS.
I used https://www.tomvoboril.com/2021/06/gps-and-raspberry-pi-stratum-1-server.html and 2022-04-04-raspios-bullseye-armhf-lite.img.xz
The hat seems to be very well engineered and well supported - it's particularly good in that the supercaps mean no changing batteries. It's sensitive and just works. I didn't use the stand-offs provided because I was using the GPS Hat case but the I/O extender is necessary.”
“I tried 1.5 days at full time to get a signal from this GPS on the raspberry pi with NO SUCCESS.
I googled for hours and hours without success. The short documentation of the supplier is obviously wrong. Since I bought the special case to fit this GPS and the RPi, this is also a lost of money. Please stop selling this GPS and case !!! I can just throw them away.
PS: too few information from the provider and from Internet. -> BAD BUY”
“I bought one of these, with an external antenna and the GPS case. I am very pleased with it and intend to buy another. Note that the hat is mounted so that its components and logo can be seen. The Pi pins pass through the board to reach the socket. Read the online instructions.
If you are using the GPS case then use its plastic stand-offs, not the metal ones with the hat.
The Uputronics instructions fail to say that you must activate the Pi serial hardware.
For better instructions, web search for "Phil's Occasional Blog Pi Stratum 1 NTP" without the quotes.”
“Works very well. Requires a little bit of code writing for the GPS HAT to play with the the astronomy program that I couple it with, but that's a part of the reason that we build Raspberry Pi's.”
