Microsecond accurate NTP with a Raspberry Pi and PPS GPS
Summary
This article provides a hands-on guide to building a microsecond-accurate NTP server on a Raspberry Pi using PPS GPS. It covers hardware setup, software installation, configuration of PPS, GPSD, and chrony, plus verification of sub-microsecond time accuracy and troubleshooting tips. It also discusses factors that affect timekeeping and updates with newer best practices.