Source note: DIY PTP grandmaster clock with a Raspberry Pi (Jeff Geerling)¶

Raw path: raw/processed/2026/diy-ptp-grandmaster-clock-raspberry-pi.md

Summary

Blog post describing Time Pi: open stratum-1 NTP + PTP appliance using Raspberry Pi 5, TimeHAT / Intel i226 NIC with hardware timestamping, optional GNSS M.2 module, Ansible configuration, and links to the time-pi GitHub project—plus practical notes on driver quirks (e.g. link speed issues).

Downstream pages

• Precision Time Protocol (PTP)
• Time synchronization — NTP and PTP sources