cuckoo-escapement/dashboard/.env.example

# Copy to .env. Nothing site-specific belongs in the Makefile.
PI=deploy@gps-ntp.local
KEY=~/.ssh/id_ed25519
APPDIR=/opt/gpsntp-dashboard

# Only needed if you front the dashboard with TLS via `make caddy`.
DOMAIN=clock.example.internal
CERT_SRC=$(HOME)/.certs/clock.example.internal

# hidden (default) | coarse (~11 km) | exact
# The receiver knows exactly where it is. `hidden` keeps that out of the page —
# and out of any screenshot you post. Think before you change this.
GPSNTP_POSITION=hidden
The Cuckoo Escapement: field report, kernel patch, dashboard What the Raspberry Pi time-server guides get wrong on a Pi 4, with the measurements. The headline artifact is a four-line pps-gpio patch: PREEMPT_RT force-threads IRQ handlers, and pps-gpio takes its timestamp inside its handler, so the realtime kernel puts a scheduler between the electrical edge and the clock. IRQF_NO_THREAD takes RMS offset from 2468 ns to 199 ns. - kernel/ the patch - dashboard/ live status page (position hidden by default) - docs-site/ the write-up (Astro/Starlight, brass, no tutorial section) 2026-07-14 09:21:25 -06:00			`# Copy to .env. Nothing site-specific belongs in the Makefile.`
			`PI=deploy@gps-ntp.local`
			`KEY=~/.ssh/id_ed25519`
			`APPDIR=/opt/gpsntp-dashboard`

			# Only needed if you front the dashboard with TLS via `make caddy`.
			`DOMAIN=clock.example.internal`
			`CERT_SRC=$(HOME)/.certs/clock.example.internal`

			`# hidden (default) \| coarse (~11 km) \| exact`
			# The receiver knows exactly where it is. `hidden` keeps that out of the page —
			`# and out of any screenshot you post. Think before you change this.`
			`GPSNTP_POSITION=hidden`