migration
This commit is contained in:
+36
-36
@@ -1,37 +1,37 @@
|
|||||||
Added RTC (https://www.adafruit.com/product/3013)
|
Added RTC (https://www.adafruit.com/product/3013)
|
||||||
added packages python3-smbus i2c-tools to installer
|
added packages python3-smbus i2c-tools to installer
|
||||||
updated installer to set gpio baud to 115200
|
updated installer to set gpio baud to 115200
|
||||||
added rtc i2c overlay /boot/firmware/config.txt
|
added rtc i2c overlay /boot/firmware/config.txt
|
||||||
removed fake-hwclock package
|
removed fake-hwclock package
|
||||||
NEO GPS Module
|
NEO GPS Module
|
||||||
Wiring
|
Wiring
|
||||||
Changed to 5v mode
|
Changed to 5v mode
|
||||||
U-Center-2 (https://www.u-blox.com/en/u-center-2)
|
U-Center-2 (https://www.u-blox.com/en/u-center-2)
|
||||||
Changed Baudrate UART1 to 115200
|
Changed Baudrate UART1 to 115200
|
||||||
Time Pulse Mode
|
Time Pulse Mode
|
||||||
Antenna Cable Delay set to the calculated 14ns
|
Antenna Cable Delay set to the calculated 14ns
|
||||||
edited shit
|
edited shit
|
||||||
baud
|
baud
|
||||||
pins for pps
|
pins for pps
|
||||||
configure
|
configure
|
||||||
unattended-upgrades
|
unattended-upgrades
|
||||||
restic
|
restic
|
||||||
all five installers
|
all five installers
|
||||||
fuckin hwclock-config or whatever
|
fuckin hwclock-config or whatever
|
||||||
|
|
||||||
1.4-rc-0
|
1.4-rc-0
|
||||||
IT WORKAN WITH NEW MODULE
|
IT WORKAN WITH NEW MODULE
|
||||||
|
|
||||||
1.5-rc-2
|
1.5-rc-2
|
||||||
updooted grafana vis
|
updooted grafana vis
|
||||||
streamlined info level
|
streamlined info level
|
||||||
collapsed all da scripts into time_fuckery.sh
|
collapsed all da scripts into time_fuckery.sh
|
||||||
|
|
||||||
1.5-rc-3
|
1.5-rc-3
|
||||||
merged all da functions into time_fuckery.sh
|
merged all da functions into time_fuckery.sh
|
||||||
measure offset (chrony_statistics.sh)
|
measure offset (chrony_statistics.sh)
|
||||||
added Commands.md
|
added Commands.md
|
||||||
pi image creation
|
pi image creation
|
||||||
|
|
||||||
1.5-rc-4
|
1.5-rc-4
|
||||||
mostly bug fixes
|
mostly bug fixes
|
||||||
@@ -1,92 +1,92 @@
|
|||||||
how do i calculate the time for a signal to travel down the wire of a gps antenna?
|
how do i calculate the time for a signal to travel down the wire of a gps antenna?
|
||||||
Calculating the time for a signal to travel down a GPS antenna cable involves understanding the **signal propagation speed**, which depends on the **velocity factor (VF)** of the cable. Here’s how to do it step-by-step:
|
Calculating the time for a signal to travel down a GPS antenna cable involves understanding the **signal propagation speed**, which depends on the **velocity factor (VF)** of the cable. Here’s how to do it step-by-step:
|
||||||
|
|
||||||
### **1. Determine the Velocity Factor (VF) of the Cable**
|
### **1. Determine the Velocity Factor (VF) of the Cable**
|
||||||
The velocity factor is a property of the cable and represents how fast an electrical signal travels compared to the speed of light in a vacuum (\(c = 3 \times 10^8 \, \text{m/s}\)).
|
The velocity factor is a property of the cable and represents how fast an electrical signal travels compared to the speed of light in a vacuum (\(c = 3 \times 10^8 \, \text{m/s}\)).
|
||||||
|
|
||||||
Common coaxial cables used for GPS antennas:
|
Common coaxial cables used for GPS antennas:
|
||||||
- **RG-58**: VF ≈ **0.66** (66% of the speed of light)
|
- **RG-58**: VF ≈ **0.66** (66% of the speed of light)
|
||||||
- **RG-174**: VF ≈ **0.70**
|
- **RG-174**: VF ≈ **0.70**
|
||||||
- **LMR-200**: VF ≈ **0.83**
|
- **LMR-200**: VF ≈ **0.83**
|
||||||
- **LMR-400**: VF ≈ **0.85**
|
- **LMR-400**: VF ≈ **0.85**
|
||||||
|
|
||||||
Check your cable’s datasheet for the exact VF.
|
Check your cable’s datasheet for the exact VF.
|
||||||
|
|
||||||
### **2. Calculate Signal Propagation Speed in the Cable**
|
### **2. Calculate Signal Propagation Speed in the Cable**
|
||||||
The actual speed (\(v\)) of the signal in the cable is:
|
The actual speed (\(v\)) of the signal in the cable is:
|
||||||
\[
|
\[
|
||||||
v = \text{VF} \times c
|
v = \text{VF} \times c
|
||||||
\]
|
\]
|
||||||
For example, with **RG-58 (VF = 0.66)**:
|
For example, with **RG-58 (VF = 0.66)**:
|
||||||
\[
|
\[
|
||||||
v = 0.66 \times 3 \times 10^8 \, \text{m/s} = 1.98 \times 10^8 \, \text{m/s}
|
v = 0.66 \times 3 \times 10^8 \, \text{m/s} = 1.98 \times 10^8 \, \text{m/s}
|
||||||
\]
|
\]
|
||||||
|
|
||||||
### **3. Measure the Cable Length**
|
### **3. Measure the Cable Length**
|
||||||
- Let’s say your GPS antenna cable is **3 meters** long.
|
- Let’s say your GPS antenna cable is **3 meters** long.
|
||||||
|
|
||||||
### **4. Calculate Signal Travel Time**
|
### **4. Calculate Signal Travel Time**
|
||||||
The time (\(t\)) for the signal to travel the length of the cable is:
|
The time (\(t\)) for the signal to travel the length of the cable is:
|
||||||
\[
|
\[
|
||||||
t = \frac{\text{Length}}{v} = \frac{\text{Length}}{\text{VF} \times c}
|
t = \frac{\text{Length}}{v} = \frac{\text{Length}}{\text{VF} \times c}
|
||||||
\]
|
\]
|
||||||
For **3 meters of RG-58**:
|
For **3 meters of RG-58**:
|
||||||
\[
|
\[
|
||||||
t = \frac{3 \, \text{m}}{1.98 \times 10^8 \, \text{m/s}} ≈ 15.15 \, \text{nanoseconds (ns)}
|
t = \frac{3 \, \text{m}}{1.98 \times 10^8 \, \text{m/s}} ≈ 15.15 \, \text{nanoseconds (ns)}
|
||||||
\]
|
\]
|
||||||
|
|
||||||
### **5. Quick Formula for Practical Use**
|
### **5. Quick Formula for Practical Use**
|
||||||
For a given length (\(L\)) in meters and velocity factor (VF):
|
For a given length (\(L\)) in meters and velocity factor (VF):
|
||||||
\[
|
\[
|
||||||
t \, (\text{ns}) ≈ \frac{L \, (\text{m}) \times 3.33}{\text{VF}}
|
t \, (\text{ns}) ≈ \frac{L \, (\text{m}) \times 3.33}{\text{VF}}
|
||||||
\]
|
\]
|
||||||
**Example (3m, RG-58, VF=0.66):**
|
**Example (3m, RG-58, VF=0.66):**
|
||||||
\[
|
\[
|
||||||
t ≈ \frac{3 \times 3.33}{0.66} ≈ 15.15 \, \text{ns}
|
t ≈ \frac{3 \times 3.33}{0.66} ≈ 15.15 \, \text{ns}
|
||||||
\]
|
\]
|
||||||
|
|
||||||
### **Why Does This Matter for GPS?**
|
### **Why Does This Matter for GPS?**
|
||||||
- **Timing Accuracy:** GPS relies on precise signal timing (errors as small as **10 ns** can cause ~3m position error).
|
- **Timing Accuracy:** GPS relies on precise signal timing (errors as small as **10 ns** can cause ~3m position error).
|
||||||
- **Antenna Delay Calibration:** Some high-precision GPS receivers allow compensating for cable delay.
|
- **Antenna Delay Calibration:** Some high-precision GPS receivers allow compensating for cable delay.
|
||||||
|
|
||||||
### **Final Answer**
|
### **Final Answer**
|
||||||
For a **3-meter RG-58 cable**, the signal delay is **~15.15 ns**. Adjust based on your cable’s **VF** and **length**.
|
For a **3-meter RG-58 cable**, the signal delay is **~15.15 ns**. Adjust based on your cable’s **VF** and **length**.
|
||||||
|
|
||||||
Would you like help estimating the impact on GPS positioning accuracy?
|
Would you like help estimating the impact on GPS positioning accuracy?
|
||||||
|
|
||||||
what is the 3.33 in those formulas?
|
what is the 3.33 in those formulas?
|
||||||
Great question! The **3.33** in the simplified formula comes from the **time (in nanoseconds) it takes light to travel 1 meter in a vacuum**. Here’s the breakdown:
|
Great question! The **3.33** in the simplified formula comes from the **time (in nanoseconds) it takes light to travel 1 meter in a vacuum**. Here’s the breakdown:
|
||||||
|
|
||||||
### **Derivation of the 3.33 Constant**
|
### **Derivation of the 3.33 Constant**
|
||||||
1. **Speed of light in a vacuum (\(c\)):**
|
1. **Speed of light in a vacuum (\(c\)):**
|
||||||
\[
|
\[
|
||||||
c = 3 \times 10^8 \, \text{meters/second}
|
c = 3 \times 10^8 \, \text{meters/second}
|
||||||
\]
|
\]
|
||||||
|
|
||||||
2. **Time for light to travel 1 meter (in seconds):**
|
2. **Time for light to travel 1 meter (in seconds):**
|
||||||
\[
|
\[
|
||||||
t = \frac{1 \, \text{meter}}{3 \times 10^8 \, \text{m/s}} ≈ 3.33 \times 10^{-9} \, \text{seconds} = 3.33 \, \text{nanoseconds (ns)}
|
t = \frac{1 \, \text{meter}}{3 \times 10^8 \, \text{m/s}} ≈ 3.33 \times 10^{-9} \, \text{seconds} = 3.33 \, \text{nanoseconds (ns)}
|
||||||
\]
|
\]
|
||||||
|
|
||||||
3. **Generalizing for any cable length (\(L\)) and velocity factor (VF):**
|
3. **Generalizing for any cable length (\(L\)) and velocity factor (VF):**
|
||||||
The delay (\(t\)) in nanoseconds is:
|
The delay (\(t\)) in nanoseconds is:
|
||||||
\[
|
\[
|
||||||
t \, (\text{ns}) = \frac{L \, (\text{meters}) \times 3.33 \, \text{ns/m}}{\text{VF}}
|
t \, (\text{ns}) = \frac{L \, (\text{meters}) \times 3.33 \, \text{ns/m}}{\text{VF}}
|
||||||
\]
|
\]
|
||||||
- **3.33 ns/m** is the baseline delay per meter in a vacuum.
|
- **3.33 ns/m** is the baseline delay per meter in a vacuum.
|
||||||
- Dividing by **VF** accounts for the slower speed in the cable.
|
- Dividing by **VF** accounts for the slower speed in the cable.
|
||||||
|
|
||||||
### **Example Recap (3m RG-58, VF = 0.66)**
|
### **Example Recap (3m RG-58, VF = 0.66)**
|
||||||
\[
|
\[
|
||||||
t = \frac{3 \, \text{m} \times 3.33 \, \text{ns/m}}{0.66} ≈ 15.15 \, \text{ns}
|
t = \frac{3 \, \text{m} \times 3.33 \, \text{ns/m}}{0.66} ≈ 15.15 \, \text{ns}
|
||||||
\]
|
\]
|
||||||
|
|
||||||
### **Why Use This Shortcut?**
|
### **Why Use This Shortcut?**
|
||||||
- Avoids recalculating \(c\) every time.
|
- Avoids recalculating \(c\) every time.
|
||||||
- Converts directly to **nanoseconds** (handy for RF and GPS timing).
|
- Converts directly to **nanoseconds** (handy for RF and GPS timing).
|
||||||
|
|
||||||
### **Key Notes**
|
### **Key Notes**
|
||||||
- If working in **feet**, use **1.016 ns/ft** (since light travels ~1 ft in ~1.016 ns).
|
- If working in **feet**, use **1.016 ns/ft** (since light travels ~1 ft in ~1.016 ns).
|
||||||
- For **picoseconds**, multiply by 1000 (e.g., 3.33 ns = 3330 ps).
|
- For **picoseconds**, multiply by 1000 (e.g., 3.33 ns = 3330 ps).
|
||||||
|
|
||||||
This constant simplifies real-world calculations for signal delays in cables. Let me know if you'd like further clarification!
|
This constant simplifies real-world calculations for signal delays in cables. Let me know if you'd like further clarification!
|
||||||
@@ -1,10 +1,10 @@
|
|||||||
|
|
||||||
# Precision Timekeeping Fuckery Additions
|
# Precision Timekeeping Fuckery Additions
|
||||||
## GPS PPS GPIO Signal
|
## GPS PPS GPIO Signal
|
||||||
dtoverlay=pps-gpio,gpiopin=18
|
dtoverlay=pps-gpio,gpiopin=18
|
||||||
## GPS GPIO UART
|
## GPS GPIO UART
|
||||||
enable_uart=1
|
enable_uart=1
|
||||||
init_uart_baud=9600
|
init_uart_baud=9600
|
||||||
## I2C Hardware RTC Overlay
|
## I2C Hardware RTC Overlay
|
||||||
dtoverlay=i2c-rtc,ds3231
|
dtoverlay=i2c-rtc,ds3231
|
||||||
# End Precision Timekeeping Fuckery Additions
|
# End Precision Timekeeping Fuckery Additions
|
||||||
@@ -1,2 +1,2 @@
|
|||||||
#!/bin/sh
|
#!/bin/sh
|
||||||
# dev=$1
|
# dev=$1
|
||||||
@@ -1,10 +1,10 @@
|
|||||||
|
|
||||||
# Precision Timekeeping Fuckery Additions
|
# Precision Timekeeping Fuckery Additions
|
||||||
## GPS PPS GPIO Signal
|
## GPS PPS GPIO Signal
|
||||||
dtoverlay=pps-gpio,gpiopin=18
|
dtoverlay=pps-gpio,gpiopin=18
|
||||||
## GPS GPIO UART
|
## GPS GPIO UART
|
||||||
enable_uart=1
|
enable_uart=1
|
||||||
init_uart_baud=9600
|
init_uart_baud=9600
|
||||||
## I2C Hardware RTC Overlay
|
## I2C Hardware RTC Overlay
|
||||||
dtoverlay=i2c-rtc,ds3231
|
dtoverlay=i2c-rtc,ds3231
|
||||||
# End Precision Timekeeping Fuckery Additions
|
# End Precision Timekeeping Fuckery Additions
|
||||||
@@ -1,2 +1,2 @@
|
|||||||
#!/bin/sh
|
#!/bin/sh
|
||||||
# dev=$1
|
# dev=$1
|
||||||
+105
-105
@@ -1,106 +1,106 @@
|
|||||||
## Install
|
## Install
|
||||||
### Hardware Needed
|
### Hardware Needed
|
||||||
1. Raspberry Pi of any type
|
1. Raspberry Pi of any type
|
||||||
2. Timing Specific GPS Module [U-BLOX ublox LEA-M8T-0-10 HUAWEI GPS Module](https://www.ebay.com/itm/134243322249)
|
2. Timing Specific GPS Module [U-BLOX ublox LEA-M8T-0-10 HUAWEI GPS Module](https://www.ebay.com/itm/134243322249)
|
||||||
3. High Precision RTC Module like [Adafruit DS3231 Precision RTC Breakout](https://www.adafruit.com/product/3013)
|
3. High Precision RTC Module like [Adafruit DS3231 Precision RTC Breakout](https://www.adafruit.com/product/3013)
|
||||||
4. CR1220 Battery for RTC
|
4. CR1220 Battery for RTC
|
||||||
5. Female to Female jumper/dupont wires
|
5. Female to Female jumper/dupont wires
|
||||||
6. Raspberry Pi Case that Exposes GPIO
|
6. Raspberry Pi Case that Exposes GPIO
|
||||||
7. (GPS Antenna)[https://www.aliexpress.us/item/3256808971033962.html]
|
7. (GPS Antenna)[https://www.aliexpress.us/item/3256808971033962.html]
|
||||||
8. (Cable for GPS Antenna)[https://www.amazon.com/Superbat-coaxial-Bulkhead-Adapter-Equipment/dp/B07FC8PVZS?th=1]
|
8. (Cable for GPS Antenna)[https://www.amazon.com/Superbat-coaxial-Bulkhead-Adapter-Equipment/dp/B07FC8PVZS?th=1]
|
||||||
9. (GPS Antenna Adaptor)[https://www.amazon.com/dp/B00CVR4NN0]
|
9. (GPS Antenna Adaptor)[https://www.amazon.com/dp/B00CVR4NN0]
|
||||||
10. UART
|
10. UART
|
||||||
11. Solder Supplies (maybe)
|
11. Solder Supplies (maybe)
|
||||||
|
|
||||||
### Configuring Hardware
|
### Configuring Hardware
|
||||||
1. Install (u-center)[https://www.u-blox.com/en/product/u-center] NOT u-center 2
|
1. Install (u-center)[https://www.u-blox.com/en/product/u-center] NOT u-center 2
|
||||||
2. Wire UART of GPS Module to your UART
|
2. Wire UART of GPS Module to your UART
|
||||||
1. Change baudrate to 115200
|
1. Change baudrate to 115200
|
||||||
2. enable timing mode?
|
2. enable timing mode?
|
||||||
3. change cable delay to calculated value
|
3. change cable delay to calculated value
|
||||||
|
|
||||||
### Wiring Everything Up
|
### Wiring Everything Up
|
||||||
#### GPS Module
|
#### GPS Module
|
||||||
1. GPS GND to RPi Physical Pin 6 (GND)
|
1. GPS GND to RPi Physical Pin 6 (GND)
|
||||||
2. GPS RX to RPi Physical Pin 8 (GPIO 14 / TX (UART))
|
2. GPS RX to RPi Physical Pin 8 (GPIO 14 / TX (UART))
|
||||||
3. GPS TX to RPi Physical Pin 10 (GPIO 15 / RX (UART))
|
3. GPS TX to RPi Physical Pin 10 (GPIO 15 / RX (UART))
|
||||||
4. GPS PPS to RPi Physical Pin 12 (GPIO 18)
|
4. GPS PPS to RPi Physical Pin 12 (GPIO 18)
|
||||||
5. GPS VIN to RPi Physical Pin 27 (3.3 volts)
|
5. GPS VIN to RPi Physical Pin 27 (3.3 volts)
|
||||||
#### RTC Module
|
#### RTC Module
|
||||||
1. RTC GND to Rpi Physical Pin 9 (GND)
|
1. RTC GND to Rpi Physical Pin 9 (GND)
|
||||||
3. RTC SDA to RPi Physical Pin 3 (GPIO 2 / SDA1 (I2C))
|
3. RTC SDA to RPi Physical Pin 3 (GPIO 2 / SDA1 (I2C))
|
||||||
4. RTC SCL to RPi Physical Pin 5 (GPIO 4 / SCL1 (I2C))
|
4. RTC SCL to RPi Physical Pin 5 (GPIO 4 / SCL1 (I2C))
|
||||||
5. RTC VCC to RPi Physical Pin 1 (3.3 volts)
|
5. RTC VCC to RPi Physical Pin 1 (3.3 volts)
|
||||||
|
|
||||||
### Setup Pi
|
### Setup Pi
|
||||||
#### Microsd Card
|
#### Microsd Card
|
||||||
1. Install [Raspberry Pi Imager](https://www.raspberrypi.com/software/) on your PC
|
1. Install [Raspberry Pi Imager](https://www.raspberrypi.com/software/) on your PC
|
||||||
2. Insert Microsd card to your PC
|
2. Insert Microsd card to your PC
|
||||||
3. Run Raspberry Pi Imager
|
3. Run Raspberry Pi Imager
|
||||||
1. Choose Device (your Raspberry Pi Type)
|
1. Choose Device (your Raspberry Pi Type)
|
||||||
2. Choose OS->Raspberry Pi OS (other)->Raspberry Pi OS Lite (64-bit)
|
2. Choose OS->Raspberry Pi OS (other)->Raspberry Pi OS Lite (64-bit)
|
||||||
3. Choose Storage (your Microsd card)
|
3. Choose Storage (your Microsd card)
|
||||||
4. Configure settings as you like them
|
4. Configure settings as you like them
|
||||||
5. Burn
|
5. Burn
|
||||||
#### Login to Raspberry Pi
|
#### Login to Raspberry Pi
|
||||||
1. `curl -s https://raw.githubusercontent.com/PrincessPi3/Precision-Timekeeping-Fuckery/refs/heads/main/installer_auto.sh?nocache=$RANDOM | $SHELL`
|
1. `curl -s https://raw.githubusercontent.com/PrincessPi3/Precision-Timekeeping-Fuckery/refs/heads/main/installer_auto.sh?nocache=$RANDOM | $SHELL`
|
||||||
2. `cd ~/Precision-Timekeeping-Fuckery && git pull; bash installer1.sh` (will reboot)
|
2. `cd ~/Precision-Timekeeping-Fuckery && git pull; bash installer1.sh` (will reboot)
|
||||||
3. `cd ~/Precision-Timekeeping-Fuckery && git pull; bash installer2.sh` (will reboot)
|
3. `cd ~/Precision-Timekeeping-Fuckery && git pull; bash installer2.sh` (will reboot)
|
||||||
4. `cd ~/Precision-Timekeeping-Fuckery && git pull; bash installer3.sh` (will reboot)
|
4. `cd ~/Precision-Timekeeping-Fuckery && git pull; bash installer3.sh` (will reboot)
|
||||||
5. `cd ~/Precision-Timekeeping-Fuckery && git pull; bash installer4.sh` (will reboot)
|
5. `cd ~/Precision-Timekeeping-Fuckery && git pull; bash installer4.sh` (will reboot)
|
||||||
6. `curl -s https://gitlab.com/princesspi/general-scripts-and-system-ssssssetup/-/raw/master/customscripts/install_script.sh?nocache=$RANDOM | sudo $SHELL`
|
6. `curl -s https://gitlab.com/princesspi/general-scripts-and-system-ssssssetup/-/raw/master/customscripts/install_script.sh?nocache=$RANDOM | sudo $SHELL`
|
||||||
7. `exec $SHELL`
|
7. `exec $SHELL`
|
||||||
8. `configure_webhook.sh`
|
8. `configure_webhook.sh`
|
||||||
9. `sudo reboot`
|
9. `sudo reboot`
|
||||||
10. Grafana
|
10. Grafana
|
||||||
1. open grafana web interface in a browser: `http://<ip>:3000`
|
1. open grafana web interface in a browser: `http://<ip>:3000`
|
||||||
2. username `admin` password `admin`
|
2. username `admin` password `admin`
|
||||||
3. set new password
|
3. set new password
|
||||||
4. Dashboards->Import
|
4. Dashboards->Import
|
||||||
1. Upload Garfana-Visualization.json
|
1. Upload Garfana-Visualization.json
|
||||||
5. edit each graph and just save
|
5. edit each graph and just save
|
||||||
11. After 24 Hours
|
11. After 24 Hours
|
||||||
1. `cd ~/Precision-Timekeeping-Fuckery`
|
1. `cd ~/Precision-Timekeeping-Fuckery`
|
||||||
2. `bash services.sh stop`
|
2. `bash services.sh stop`
|
||||||
3. `bash nuke_logs.sh`
|
3. `bash nuke_logs.sh`
|
||||||
4. `bash reconfig_full.sh ./running-warn-level-conf`
|
4. `bash reconfig_full.sh ./running-warn-level-conf`
|
||||||
5. `sudo reboot`
|
5. `sudo reboot`
|
||||||
|
|
||||||
## Scripts
|
## Scripts
|
||||||
* `uninstall.sh` uninstalls everything
|
* `uninstall.sh` uninstalls everything
|
||||||
* `chrony_statistics.sh` uses the python script chrony_statistics.py and feeds it copies of tracking statistics to calculate offset
|
* `chrony_statistics.sh` uses the python script chrony_statistics.py and feeds it copies of tracking statistics to calculate offset
|
||||||
*`cleanup.sh` remove old files
|
*`cleanup.sh` remove old files
|
||||||
* `dump_configs.sh` make a backup of all configs
|
* `dump_configs.sh` make a backup of all configs
|
||||||
* `full_status.sh` show status of all of the componants of Precision-Timekeeping-Fuckery one by one
|
* `full_status.sh` show status of all of the componants of Precision-Timekeeping-Fuckery one by one
|
||||||
* `installer_auto.sh` script to initialize the install, it is run first
|
* `installer_auto.sh` script to initialize the install, it is run first
|
||||||
* usage: `curl -s https://raw.githubusercontent.com/PrincessPi3/Precision-Timekeeping-Fuckery/refs/heads/main/installer_auto.sh?nocache=$RANDOM | $SHELL`
|
* usage: `curl -s https://raw.githubusercontent.com/PrincessPi3/Precision-Timekeeping-Fuckery/refs/heads/main/installer_auto.sh?nocache=$RANDOM | $SHELL`
|
||||||
* `installer1.sh` first manual installer script. runs rpi-config and optionall rpi-update
|
* `installer1.sh` first manual installer script. runs rpi-config and optionall rpi-update
|
||||||
* `installer2.sh` second manual installer script. performs a dist-upgrade and an autoremove
|
* `installer2.sh` second manual installer script. performs a dist-upgrade and an autoremove
|
||||||
* `installer3.sh` third manual installer script. adds grafana and telegram repos, uninstalls and disables unneeded junk, installs packages, adds pps-gpio to /etc/modules if not there, autoremove, gives users the right groups
|
* `installer3.sh` third manual installer script. adds grafana and telegram repos, uninstalls and disables unneeded junk, installs packages, adds pps-gpio to /etc/modules if not there, autoremove, gives users the right groups
|
||||||
* `installer4.sh` final manual installer script. runs `reconfig_full.sh` and enables the services on boot
|
* `installer4.sh` final manual installer script. runs `reconfig_full.sh` and enables the services on boot
|
||||||
* `nuke_logs.sh` does just what it says on the tin
|
* `nuke_logs.sh` does just what it says on the tin
|
||||||
* `reconfig_full.sh` reconfigures services in one of the directories
|
* `reconfig_full.sh` reconfigures services in one of the directories
|
||||||
* usage: `bash reconfig_full.sh <config_directory>`
|
* usage: `bash reconfig_full.sh <config_directory>`
|
||||||
* `services.sh` runs an operation on all of the relevant services
|
* `services.sh` runs an operation on all of the relevant services
|
||||||
* usage: `bash services.sh [start|status|stop|restart|reload|enable|disable]`
|
* usage: `bash services.sh [start|status|stop|restart|reload|enable|disable]`
|
||||||
* `show_running_configs.sh` shows the current config files, one by one
|
* `show_running_configs.sh` shows the current config files, one by one
|
||||||
* `cable-delay-calc.xlsx` spreadsheet to estimate cable delay in ns
|
* `cable-delay-calc.xlsx` spreadsheet to estimate cable delay in ns
|
||||||
|
|
||||||
## Files
|
## Files
|
||||||
* `status.txt` this shows the progress of an ongoing install, it is automatically created at the start and deleted at the end
|
* `status.txt` this shows the progress of an ongoing install, it is automatically created at the start and deleted at the end
|
||||||
* `CHANGEOG.txt` this is all the latest changes
|
* `CHANGEOG.txt` this is all the latest changes
|
||||||
* `version.txt` version of Precision-Timekeeping-Fuckery
|
* `version.txt` version of Precision-Timekeeping-Fuckery
|
||||||
|
|
||||||
## Logs
|
## Logs
|
||||||
### Chrony Logs
|
### Chrony Logs
|
||||||
* `sudo tail -f /var/log/chrony/tracking.log`
|
* `sudo tail -f /var/log/chrony/tracking.log`
|
||||||
* `sudo tail -f /var/log/chrony/statistics.log`
|
* `sudo tail -f /var/log/chrony/statistics.log`
|
||||||
* `sudo tail -f /var/log/chrony/measurements.log`
|
* `sudo tail -f /var/log/chrony/measurements.log`
|
||||||
### Telegraf Logs
|
### Telegraf Logs
|
||||||
* `sudo tail -f /var/log/telegraf/telegraf.log`
|
* `sudo tail -f /var/log/telegraf/telegraf.log`
|
||||||
### Grafana Logs
|
### Grafana Logs
|
||||||
* `sudo tail -f /var/log/grafana/grafana.log`
|
* `sudo tail -f /var/log/grafana/grafana.log`
|
||||||
### Influxdb Logs
|
### Influxdb Logs
|
||||||
* `sudo tail -f /var/log/syslog`
|
* `sudo tail -f /var/log/syslog`
|
||||||
### Root Crontab Logs
|
### Root Crontab Logs
|
||||||
* `sudo tail -f /var/log/root-crontab.log`
|
* `sudo tail -f /var/log/root-crontab.log`
|
||||||
@@ -1,10 +1,10 @@
|
|||||||
|
|
||||||
# Precision Timekeeping Fuckery Additions
|
# Precision Timekeeping Fuckery Additions
|
||||||
## GPS PPS GPIO Signal
|
## GPS PPS GPIO Signal
|
||||||
dtoverlay=pps-gpio,gpiopin=18
|
dtoverlay=pps-gpio,gpiopin=18
|
||||||
## GPS GPIO UART
|
## GPS GPIO UART
|
||||||
enable_uart=1
|
enable_uart=1
|
||||||
init_uart_baud=9600
|
init_uart_baud=9600
|
||||||
## I2C Hardware RTC Overlay
|
## I2C Hardware RTC Overlay
|
||||||
dtoverlay=i2c-rtc,ds3231
|
dtoverlay=i2c-rtc,ds3231
|
||||||
# End Precision Timekeeping Fuckery Additions
|
# End Precision Timekeeping Fuckery Additions
|
||||||
@@ -1,2 +1,2 @@
|
|||||||
#!/bin/sh
|
#!/bin/sh
|
||||||
# dev=$1
|
# dev=$1
|
||||||
@@ -1,12 +1,12 @@
|
|||||||
|
|
||||||
# Precision Timekeeping Fuckery Additions
|
# Precision Timekeeping Fuckery Additions
|
||||||
## GPS PPS GPIO Signal
|
## GPS PPS GPIO Signal
|
||||||
dtoverlay=pps-gpio,gpiopin=18
|
dtoverlay=pps-gpio,gpiopin=18
|
||||||
|
|
||||||
## GPS GPIO UART
|
## GPS GPIO UART
|
||||||
enable_uart=1
|
enable_uart=1
|
||||||
init_uart_baud=115200
|
init_uart_baud=115200
|
||||||
|
|
||||||
## I2C Hardware RTC Overlay
|
## I2C Hardware RTC Overlay
|
||||||
dtoverlay=i2c-rtc,ds3231
|
dtoverlay=i2c-rtc,ds3231
|
||||||
# End Precision Timekeeping Fuckery Additions
|
# End Precision Timekeeping Fuckery Additions
|
||||||
@@ -1,2 +1,2 @@
|
|||||||
#!/bin/sh
|
#!/bin/sh
|
||||||
dev=$1
|
dev=$1
|
||||||
@@ -1,12 +1,12 @@
|
|||||||
|
|
||||||
# Precision Timekeeping Fuckery Additions
|
# Precision Timekeeping Fuckery Additions
|
||||||
## GPS PPS GPIO Signal
|
## GPS PPS GPIO Signal
|
||||||
dtoverlay=pps-gpio,gpiopin=18
|
dtoverlay=pps-gpio,gpiopin=18
|
||||||
|
|
||||||
## GPS GPIO UART
|
## GPS GPIO UART
|
||||||
enable_uart=1
|
enable_uart=1
|
||||||
init_uart_baud=115200
|
init_uart_baud=115200
|
||||||
|
|
||||||
## I2C Hardware RTC Overlay
|
## I2C Hardware RTC Overlay
|
||||||
dtoverlay=i2c-rtc,ds3231
|
dtoverlay=i2c-rtc,ds3231
|
||||||
# End Precision Timekeeping Fuckery Additions
|
# End Precision Timekeeping Fuckery Additions
|
||||||
@@ -1,2 +1,2 @@
|
|||||||
#!/bin/sh
|
#!/bin/sh
|
||||||
dev=$1
|
dev=$1
|
||||||
+60
-60
@@ -1,61 +1,61 @@
|
|||||||
rtc module
|
rtc module
|
||||||
ds3231
|
ds3231
|
||||||
product page: https://www.adafruit.com/product/3013
|
product page: https://www.adafruit.com/product/3013
|
||||||
product tutorial: https://learn.adafruit.com/adafruit-ds3231-precision-rtc-breakout/overview
|
product tutorial: https://learn.adafruit.com/adafruit-ds3231-precision-rtc-breakout/overview
|
||||||
install packages python3-smbus i2c-tools
|
install packages python3-smbus i2c-tools
|
||||||
enable i2c support in raspi-config
|
enable i2c support in raspi-config
|
||||||
interfacing options->i2c->
|
interfacing options->i2c->
|
||||||
enable <Yes>
|
enable <Yes>
|
||||||
kernel module loaded by default <Yes>
|
kernel module loaded by default <Yes>
|
||||||
check that i2c-dev is in /etc/modules
|
check that i2c-dev is in /etc/modules
|
||||||
add `dtoverlay=i2c-rtc,ds3231` to /boot/firmware/config.txt
|
add `dtoverlay=i2c-rtc,ds3231` to /boot/firmware/config.txt
|
||||||
reboot
|
reboot
|
||||||
detect/test module `sudo i2cdetect -y 1`
|
detect/test module `sudo i2cdetect -y 1`
|
||||||
looking for address UU AFTER configure Overlay
|
looking for address UU AFTER configure Overlay
|
||||||
looking for address 68 BEFORE configure overlay
|
looking for address 68 BEFORE configure overlay
|
||||||
remove package fake-hwclock
|
remove package fake-hwclock
|
||||||
remove from rc
|
remove from rc
|
||||||
read rtc `sudo hwclock -r`
|
read rtc `sudo hwclock -r`
|
||||||
set rtc `sudo hwclock -w`
|
set rtc `sudo hwclock -w`
|
||||||
raspberry pi RTC tutorial: https://learn.adafruit.com/adding-a-real-time-clock-to-raspberry-pi/set-rtc-time
|
raspberry pi RTC tutorial: https://learn.adafruit.com/adding-a-real-time-clock-to-raspberry-pi/set-rtc-time
|
||||||
pinout: https://learn.adafruit.com/adafruit-ds3231-precision-rtc-breakout/pinouts
|
pinout: https://learn.adafruit.com/adafruit-ds3231-precision-rtc-breakout/pinouts
|
||||||
battery: CR1220
|
battery: CR1220
|
||||||
chipset product page: https://www.analog.com/en/products/ds3231.html
|
chipset product page: https://www.analog.com/en/products/ds3231.html
|
||||||
chipset datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/DS3231.pdf
|
chipset datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/DS3231.pdf
|
||||||
chipset reliability report: https://www.analog.com/media/en/technical-documentation/reliability-data/ds3231.pdf
|
chipset reliability report: https://www.analog.com/media/en/technical-documentation/reliability-data/ds3231.pdf
|
||||||
notes:
|
notes:
|
||||||
https://serverfault.com/questions/1093101/chrony-hosting-time-with-rtc-as-authoritative-clock-on-an-air-gapped-isolated?__cf_chl_tk=G_sZX4ClltOv3fQJpH1q2a65tx4O2s_H_FObeBQ2UyU-1749831141-1.0.1.1-W0v5fl8cCrf0tIpB0pAqIb93L5MuoWeebiHm7iLGAlo
|
https://serverfault.com/questions/1093101/chrony-hosting-time-with-rtc-as-authoritative-clock-on-an-air-gapped-isolated?__cf_chl_tk=G_sZX4ClltOv3fQJpH1q2a65tx4O2s_H_FObeBQ2UyU-1749831141-1.0.1.1-W0v5fl8cCrf0tIpB0pAqIb93L5MuoWeebiHm7iLGAlo
|
||||||
https://stackoverflow.com/questions/49730407/how-to-do-one-shot-time-sync-using-chrony
|
https://stackoverflow.com/questions/49730407/how-to-do-one-shot-time-sync-using-chrony
|
||||||
do oneshot sync?
|
do oneshot sync?
|
||||||
script set every x seconds
|
script set every x seconds
|
||||||
`sudo hwclock -r`
|
`sudo hwclock -r`
|
||||||
GPS module
|
GPS module
|
||||||
baudrates
|
baudrates
|
||||||
1. 115200 // working
|
1. 115200 // working
|
||||||
2. 230400
|
2. 230400
|
||||||
3. 460800
|
3. 460800
|
||||||
cable delay
|
cable delay
|
||||||
cable is 10ft? RG-174?
|
cable is 10ft? RG-174?
|
||||||
14.3
|
14.3
|
||||||
|
|
||||||
velocity factors of cable forms
|
velocity factors of cable forms
|
||||||
RG-58: VF ≈ 0.66 (66% of the speed of light)
|
RG-58: VF ≈ 0.66 (66% of the speed of light)
|
||||||
RG-174: VF ≈ 0.70
|
RG-174: VF ≈ 0.70
|
||||||
LMR-200: VF ≈ 0.83
|
LMR-200: VF ≈ 0.83
|
||||||
LMR-400: VF ≈ 0.85
|
LMR-400: VF ≈ 0.85
|
||||||
|
|
||||||
formula
|
formula
|
||||||
CD = time in nanoseconds of cable delay
|
CD = time in nanoseconds of cable delay
|
||||||
L = Length of cable in UNIT
|
L = Length of cable in UNIT
|
||||||
DF = delay factor in UNIT )speed of light in a vaccum used in nanoseconds per UNIT)
|
DF = delay factor in UNIT )speed of light in a vaccum used in nanoseconds per UNIT)
|
||||||
3.33 = ns (nanoseconds per meter)
|
3.33 = ns (nanoseconds per meter)
|
||||||
1.016 = feet (feet per meter)
|
1.016 = feet (feet per meter)
|
||||||
VF = velocity factor of cable (above)
|
VF = velocity factor of cable (above)
|
||||||
CD ≈ (L*DF)/VF
|
CD ≈ (L*DF)/VF
|
||||||
CD ≈ (Length (meters) * 3.33 (baseline light speed in a vaccum ns/m)) / Velocity Factor of cable (VF)
|
CD ≈ (Length (meters) * 3.33 (baseline light speed in a vaccum ns/m)) / Velocity Factor of cable (VF)
|
||||||
|
|
||||||
derriving the speed of light offset
|
derriving the speed of light offset
|
||||||
t(ns) = time in nanoseconds
|
t(ns) = time in nanoseconds
|
||||||
c = speed of light in a vaccum in meters per second (3*(10^8) m/s)
|
c = speed of light in a vaccum in meters per second (3*(10^8) m/s)
|
||||||
d(m) = distance to travel in meters
|
d(m) = distance to travel in meters
|
||||||
t(ns) = d(m)/c
|
t(ns) = d(m)/c
|
||||||
@@ -1,12 +1,12 @@
|
|||||||
|
|
||||||
# Precision Timekeeping Fuckery Additions
|
# Precision Timekeeping Fuckery Additions
|
||||||
## GPS PPS GPIO Signal
|
## GPS PPS GPIO Signal
|
||||||
dtoverlay=pps-gpio,gpiopin=18
|
dtoverlay=pps-gpio,gpiopin=18
|
||||||
|
|
||||||
## GPS GPIO UART
|
## GPS GPIO UART
|
||||||
enable_uart=1
|
enable_uart=1
|
||||||
init_uart_baud=115200
|
init_uart_baud=115200
|
||||||
|
|
||||||
## I2C Hardware RTC Overlay
|
## I2C Hardware RTC Overlay
|
||||||
dtoverlay=i2c-rtc,ds3231
|
dtoverlay=i2c-rtc,ds3231
|
||||||
# End Precision Timekeeping Fuckery Additions
|
# End Precision Timekeeping Fuckery Additions
|
||||||
@@ -1,2 +1,2 @@
|
|||||||
#!/bin/sh
|
#!/bin/sh
|
||||||
dev=$1
|
dev=$1
|
||||||
@@ -1,12 +1,12 @@
|
|||||||
|
|
||||||
# Precision Timekeeping Fuckery Additions
|
# Precision Timekeeping Fuckery Additions
|
||||||
## GPS PPS GPIO Signal
|
## GPS PPS GPIO Signal
|
||||||
dtoverlay=pps-gpio,gpiopin=18
|
dtoverlay=pps-gpio,gpiopin=18
|
||||||
|
|
||||||
## GPS GPIO UART
|
## GPS GPIO UART
|
||||||
enable_uart=1
|
enable_uart=1
|
||||||
init_uart_baud=115200
|
init_uart_baud=115200
|
||||||
|
|
||||||
## I2C Hardware RTC Overlay
|
## I2C Hardware RTC Overlay
|
||||||
dtoverlay=i2c-rtc,ds3231
|
dtoverlay=i2c-rtc,ds3231
|
||||||
# End Precision Timekeeping Fuckery Additions
|
# End Precision Timekeeping Fuckery Additions
|
||||||
@@ -1,12 +1,12 @@
|
|||||||
#!/bin/sh
|
#!/bin/sh
|
||||||
# Reset the System Clock to UTC if the hardware clock from which it
|
# Reset the System Clock to UTC if the hardware clock from which it
|
||||||
# was copied by the kernel was in localtime.
|
# was copied by the kernel was in localtime.
|
||||||
|
|
||||||
dev=$1
|
dev=$1
|
||||||
|
|
||||||
# if [ -e /run/systemd/system ] ; then
|
# if [ -e /run/systemd/system ] ; then
|
||||||
# exit 0
|
# exit 0
|
||||||
# fi
|
# fi
|
||||||
|
|
||||||
# /sbin/hwclock --rtc=$dev --systz
|
# /sbin/hwclock --rtc=$dev --systz
|
||||||
# /sbin/hwclock --rtc=$dev --hctosys
|
# /sbin/hwclock --rtc=$dev --hctosys
|
||||||
Reference in New Issue
Block a user