Tag
This article details a DIY build of a Stratum 1 PTP Grandmaster clock using a Raspberry Pi CM4 and GPS module for nanosecond-accurate time synchronization in industrial infrastructure, comparing it to costly commercial solutions.
A detailed write-up of an abandoned project to build a 'fake' GPS module that obtains time over WiFi using NTP and an ESP8266, aiming for sub-millisecond accuracy but ultimately falling short due to hardware limitations.
Wi-Wi STAMP is a wireless time synchronization protocol and hardware from Japan's NICT, achieving nanosecond-level sync and millimeter-level accuracy using the 900 MHz band, demonstrated at NAB 2026.
The article details a technical investigation into how an HTTP header caused time skew on the time.gov website, explaining the differences between NTP and HTTP time synchronization.