Precision Timekeeping Fuckery

How it works

Services

• gpsd
• chrony
• telegraf
• influxdb
• grafana-server
• syslog-ng

Testing

Status (Everything)

• bash ~/Precision-Timekeeping-Fuckery/full_status.sh

Status (Services)

• bash ~/Precision-Timekeeping-Fuckert/status_services.sh

Test PPS

• sudo ppstest /dev/pps0

Logs Stuff

Chrony Logs

• sudo tail -f /var/log/chrony/tracking.log
• sudo tail -f /var/log/chrony/statistics.log
• sudo tail -f /var/log/chrony/measurements.log

Telegraf Logs

• sudo tail -f /var/log/telegraf/telegraf.log

Grafana Logs

• sudo tail -f /var/log/grafana/grafana.log

Influxdb Logs

• sudo tail -f /var/log/syslog

Setup

Requirements

1. Raspberry Pi with
   1. Raspberry Pi OS Installed
   2. SSH Access
   3. sudo permissions
2. A timing specific GPS module, wired to the Raspberry Pi GPIOs:
   1. GPS GND to RPi pin 6
   2. GPS VIN to RPi pin 2 or 4
   3. GPS PPS to RPi pin 12 (GPIO 18)
   4. GPS RX to RPi pin 8
   5. GPS TX to RPi pin 10

Install

Clone the repo
git clone https://github.com/PrincessPi3/Precision-Timekeeping-Fuckery.git ~/Precision-Timekeping-Fuckery

Run raspi-config

1. Interface Options->Serial Port
   1. Would you like a login shell to be accessible over serial?
   2. Would you like the serial port hardware to be enabled?
2. Advanced Options 1. A1 Expand Filesystem

update os and packages (will reboot when finished)
bash ~/Precision-Timekeeping-Fuckery/update.sh

install packages (will reboot when finished)
bash ~/Precision-Timekeeping-Fuckery/packages.sh

finish install (will reboot when finished)
bash ~/Precision-Timekeeping-Fuckery/installer.sh

check status of everything
bash ~/Precision-Timekeeping-Fuckery/full_status.sh

navigate to http://<ip's ip>:3000
Upload ~/Garfana-Visualization.json to create dashboard

Clients

Windows

1. Open the Control Panel and navigate to the Date and Time settings.
2. Click on "Internet Time" and then "Change settings".
3. Enable the option to "Synchronize with an Internet time server".
4. Choose a time server from the available list or enter a custom one.
5. Click "OK" to save the changes.

Links

Helpful Guide https://austinsnerdythings.com/2025/02/14/revisiting-microsecond-accurate-ntp-for-raspberry-pi-with-gps-pps-in-2025/

Current Module

• Chipset https://www.u-blox.com/en/product/neo-f10n-module
• Breakout https://docs.sparkfun.com/SparkFun_u-blox_NEO-F10N/single_page/

Next Module

• Chipset https://www.u-blox.com/en/product/neolea-m8t-series
• Breakout https://www.ebay.com/itm/134243322249

U-Blox Software (U-Center) https://www.u-blox.com/en/product/u-center

todo

• x ntp server
  • outside dial in
    • cloudflare tunnel?
• change gps settings
  • higher baudrate
    1. 230400
    2. 460800
    3. 921600
• uninstall desktop/etc
  • change boot target to cli
• README
  • installer1-3.sh
  • grafana
    • url
    • default login
    • import
    • data source
    • fix
    • Raspberry OS Lite

known bugs doubling of appending to /boot/firmaware/config.txt and /etc/modules when running intstaller3.sh

notes: reboots grafana connections->data sources add influxdb new dashboard import edit each panel and select influxdb as data source if issues doubling of appending to /boot/firmaware/config.txt and /etc/modules