Tag: NTP
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NTP Synchronization problem in NTP server
When the GPS receiver is turned off for a day and then powered back, you will find the GPS receiver works fine by typing Type the “ntpq -p” and return messages becomes This means NTP server cannot sync the time with GPS receiver. Check with /var/log/ntp.log, you find The error message “SHM: difference limit exceed,… Read more
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Create a NTP server using Orange-pi Zero 2 and GPS receiver
In my previous post, I outlined the steps to create an NTP server using a Raspberry Pi 4B and GPS receiver. However, the cost of a Raspberry Pi 4B with a LAN port is quite high. Therefore, I decided to switch to the Orange Pi Zero 2, which can reduce costs by one-third. The steps… Read more
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Create a NTP server using Raspberry-pi and GPS receiver
In this project, a Raspberry Pi 4B is connected to a Neo7 GPS receiver via a USB cable to obtain GPS data, particularly the time information. The Raspberry Pi will then be configured as an NTP server for other IP-based devices. Real ApplicationIn a secure CCTV system, all components, including cameras, network switches, and NVR… Read more
