My current Stratum 1 server is a Raspberry Pi connected with a Garmin 18x LVC GPS receiver. This is a general-purpose GPS receiver which I previously used with a normal x86 server. The good thing is that it has a long cable, which makes it possible to mount the antenna outside, but I now want to rep…

I have one GPS Recv. without RTC - didn’t test it yet. It’s a µBlox Neo-6M IIRC. This one have an µBlox M8 with internal RTC https://store.uputronics.com/index.php?route=product/product&product_id=81 If you just want to save your current dat / time for bootup, take a look at the Debian package “f…

Another GPS HAT with RTC: [image] Adafruit Ultimate GPS HAT for Raspberry Pi A+/B+/Pi 2/Pi 3 It's 10PM, do you know where your Raspberry Pi is? If you had this GPS HAT, you would! This new HAT from Adafruit adds our celebrated Ultimate GPS on it, so you can add precision time ... PR…

Thanks for the recommendations. Saving the previous time at shutdown unfortunately won’t work. It is mostly to prevent losing time when power is lost. I have now had a few occasions where the power was lost to both the Pi and the router. After startup the PPS signal was the first signal available t…

Or just add an RTC to your Pi. You can get some boards for around 7$ or 5€ (on amazon.de ). They are plug’n’play.

There is no room for an RTC board anymore. I currently already use a serial board on top of the pi to connect the GPS to.

Chrony’s suggestion is: 5.5. What if my computer does not have an RTC or backup battery? In this case you can still use the -s option to set the system clock to the last modification time of the drift file, which should correspond to the system time when chronyd was previously stopped. Not sur…

Thanks for the hint. I didn’t know this -s option. It looks like my drift file is updated every hour.

I ordered this, it should be more accurate than adafruit [image] GPS/RTC Expansion Board for Raspberry Pi The Uputronics GPS/RTC Expansion Board for Raspberry Pi provides a modern multi GNSS GPS receiver and hardware RTC with no soldering required. It can be connected to all Raspberry P…

Which GPS Raspberry Pi hat for stratum 1 server?

Server operators

magnemann August 20, 2026, 8:50am 9

I ordered this, it should be more accurate than adafruit

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Which GPS Raspberry Pi hat for stratum 1 server?

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