195 lines
5.4 KiB
Markdown
195 lines
5.4 KiB
Markdown
# Precision Timekeeping Fuckery
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## How it works
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### Services
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* `gpsd`
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* `chrony`
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* `telegraf`
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* `influxdb`
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* `grafana-server`
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* `syslog-ng`
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### Testing
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**Status (Everything)**
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* `bash ~/Precision-Timekeeping-Fuckery/full_status.sh`
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**Status (Services)**
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* `bash ~/Precision-Timekeeping-Fuckery/status_services.sh`
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**Test PPS**
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* `sudo ppstest /dev/pps0`
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### Logs Stuff
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**Chrony Logs**
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* `sudo tail -f /var/log/chrony/tracking.log`
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* `sudo tail -f /var/log/chrony/statistics.log`
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* `sudo tail -f /var/log/chrony/measurements.log`
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**Telegraf Logs**
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* `sudo tail -f /var/log/telegraf/telegraf.log`
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**Grafana Logs**
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* `sudo tail -f /var/log/grafana/grafana.log`
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**Influxdb Logs**
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* `sudo tail -f /var/log/syslog`
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**Root Crontab Logs**
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* `sudo tail -f /var/log/root-crontab.log`
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## Setup
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### Requirements
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1. Raspberry Pi with
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1. Raspberry Pi OS Light Version Installed
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2. SSH Access
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3. sudo permissions
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2. A timing specific GPS module, wired to the Raspberry Pi GPIOs:
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1. GPS GND to RPi Physical Pin 6 (GND)
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2. GPS RX to RPi Physical Pin 8 (GPIO 14 / TX (UART))
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3. GPS TX to RPi Physical Pin 10 (GPIO 15 / RX (UART))
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4. GPS PPS to RPi Physical Pin 12 (GPIO 18)
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5. GPS VIN to RPi Physical Pin 27 (3.3 volts)
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3. I2C RTC Module
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1. RTC GND to Rpi Physical Pin 9 (GND)
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3. RTC SDA to RPi Physical Pin 3 (GPIO 2 / SDA1 (I2C))
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4. RTC RCL to RPi Physical Pin 5 (GPIO 4 / SCL1 (I2C))
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5. RTC VCC to RPi Physical Pin 1 (3.3 volts)
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### Install
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### Hardware
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1. pi4/5 and stuff for it
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2. gps timing module
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3. rtc
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4. battery for rtc
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5. wires
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### Wiring
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[Pins and Wiring Guide](./Pins.md)
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#### OS
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1. Raspberry Pi OS 64 bit lite
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1. Raspberry Pi imager
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2. Configure in imager
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1. hostname: grandmasterclock
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2. enable ssh
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3. ssh key
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4. username
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5. password
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6. locale
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7. keyboard
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#### Software
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**WILL REBOOT IN BETWEEN EACH COMMAND**
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1. `curl -s https://raw.githubusercontent.com/PrincessPi3/Precision-Timekeeping-Fuckery/refs/heads/main/installer_auto.sh?nocache=$RANDOM | sudo "$SHELL"`
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2. `cd ~/Precision-Timekeeping-Fuckery && git pull && bash ~/Precision-Timekeeping-Fuckery/installer1.sh`
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3. `cd ~/Precision-Timekeeping-Fuckery && git pull && bash ~/Precision-Timekeeping-Fuckery/installer2.sh`
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4. `cd ~/Precision-Timekeeping-Fuckery && git pull && bash ~/Precision-Timekeeping-Fuckery/installer3.sh`
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5. `cd ~/Precision-Timekeeping-Fuckery && git pull && bash ~/Precision-Timekeeping-Fuckery/installer4.sh`
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#### Manual
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Clone the repo
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`git clone https://github.com/PrincessPi3/Precision-Timekeeping-Fuckery.git ~/Precision-Timekeping-Fuckery`
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Run raspi-config
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1. Interface Options->Serial Port
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1. Would you like a login shell to be accessible over serial? **<No>**
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2. Would you like the serial port hardware to be enabled? **<Yes>**
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2. Advanced Options
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1. A1 Expand Filesystem
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update os and packages (will reboot when finished)
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`bash ~/Precision-Timekeeping-Fuckery/update.sh`
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install packages (will reboot when finished)
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`bash ~/Precision-Timekeeping-Fuckery/packages.sh`
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finish install (will reboot when finished)
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`bash ~/Precision-Timekeeping-Fuckery/installer.sh`
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check status of everything
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`bash ~/Precision-Timekeeping-Fuckery/full_status.sh`
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navigate to `http://<ip's ip>:3000`
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Upload ~/Garfana-Visualization.json to create dashboard
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### Clients
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**Windows**
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1. Open the Control Panel and navigate to the Date and Time settings.
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2. Click on "Internet Time" and then "Change settings".
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3. Enable the option to "Synchronize with an Internet time server".
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4. Choose a time server from the available list or enter a custom one.
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5. Click "OK" to save the changes.
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## Links
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**Helpful Guide** https://austinsnerdythings.com/2025/02/14/revisiting-microsecond-accurate-ntp-for-raspberry-pi-with-gps-pps-in-2025/
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**Current Module**
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* Chipset https://www.u-blox.com/en/product/neo-f10n-module
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* Breakout https://docs.sparkfun.com/SparkFun_u-blox_NEO-F10N/single_page/
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**Next Module**
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* Chipset https://www.u-blox.com/en/product/neolea-m8t-series
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* Breakout https://www.ebay.com/itm/134243322249
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**U-Blox Software (U-Center)** https://www.u-blox.com/en/product/u-center
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**todo**
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* case
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* gps sma antenna adaptor
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* change gps settings
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* use 5v
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* adjust time delay to be closer to
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* higher baudrate
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1. 460800
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* README
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* installer1-4.sh
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* sudo apt update && sudo apt install -y git
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* git clone https://github.com/PrincessPi3/Precision-Timekeeping-Fuckery.git ~/Precision-Timekeeping-Fuckery
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* cd ~/Precision-Timekeeping-Fuckery
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* grafana
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* url
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* default login
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* import
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* data source
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* fix
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* current
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* connections->data sources->add data source->influxdb
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* url http://127.0.0.1:8086
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* timeout 5
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* database Chrony_Stats
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* save and test
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* new dashboard
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* import a dashbboard->Garfana-Visualization.json
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* edit and update each pannel
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* save dashboard
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* Raspberry OS Lite
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* Document scripts
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* chrony_statistics.sh
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* services.sh
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* full_status.sh
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* cleanup.sh
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* dump_configs.sh
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* nuke_logs.sh
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* reconfig_full.sh
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* link to docs of all the services and tools
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* influxdb
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* chrony
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* gpsd
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* telegraf
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* garfana
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* syslog-ng
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* u-blox software
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* modules
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* chipsets
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* datasheet
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* specific boards
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* datasheet
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* installer with reboot cron for sequence?
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notes:
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gps cable delay : RG-85 : 0.051 ns/cm
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10ft in cm: 304.8
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gps cable delay: 304.8*0.051 = 15.5448ns, round up to 16ns
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**known bugs**
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