PrincessPi/Precision-Timekeeping-Fuckery
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Princess Pi
2025-06-13 14:39:26 -06:00
parent 86d26bd581
commit 87b0e9b3e8
6 changed files with 12 additions and 11 deletions
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CHANGELOG.txt
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@@ -1,13 +1,13 @@
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 230400 updated installer to set gpio baud to 460800
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 230400 Changed Baudrate UART1 to 460800
Time Pulse Mode Time Pulse Mode
Antenna Cable Delay set to the calculated 14ns Antenna Cable Delay set to the calculated 14ns
Installer Installer
README.md
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@@ -108,7 +108,7 @@ Upload ~/Garfana-Visualization.json to create dashboard
* use 5v * use 5v
* adjust time delay to be closer to * adjust time delay to be closer to
* higher baudrate * higher baudrate
1. 230400 1. 460800
* README * README
* installer1-4.sh * installer1-4.sh
* sudo apt update && sudo apt install -y git * sudo apt update && sudo apt install -y git
debug-level-conf-dev/boot-firmware-config.txt
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@@ -5,7 +5,7 @@ dtoverlay=pps-gpio,gpiopin=18
## GPS GPIO UART ## GPS GPIO UART
enable_uart=1 enable_uart=1
init_uart_baud=230400 init_uart_baud=460800
## I2C Hardware RTC Overlay ## I2C Hardware RTC Overlay
dtoverlay=i2c-rtc,ds3231 dtoverlay=i2c-rtc,ds3231
debug-level-conf-dev/gpsd
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@@ -4,8 +4,8 @@
DEVICES="/dev/ttyS0 /dev/pps0" DEVICES="/dev/ttyS0 /dev/pps0"
# -n means start without a client connection (i.e. at boot) # -n means start without a client connection (i.e. at boot)
# -s 115200 is to set baud to 230400 # -s 115200 is to set baud to 460800
GPSD_OPTIONS="-n -s 230400" GPSD_OPTIONS="-n -s 460800"
# also start in general # also start in general
START_DAEMON="true" START_DAEMON="true"
notes-scratch-todo.txt
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@@ -17,8 +17,6 @@ rtc module
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
@@ -31,8 +29,11 @@ rtc module
do oneshot sync? do oneshot sync?
script set every x seconds script set every x seconds
`sudo hwclock -r` `sudo hwclock -r`
change gps to use 5v if possible so rtc can use 3v GPS module
baudrates
1. 115200 // working
2. 230400
3. 460800
cable delay cable delay
cable is 10ft? RG-174? cable is 10ft? RG-174?
14.3 14.3
reconfig_full.sh
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@@ -60,7 +60,7 @@ else
# #
# sudo bash -c "echo '# GPS GPIO UART' >> /boot/firmware/config.txt" # sudo bash -c "echo '# GPS GPIO UART' >> /boot/firmware/config.txt"
# sudo bash -c "echo 'enable_uart=1' >> /boot/firmware/config.txt" # enable uart # sudo bash -c "echo 'enable_uart=1' >> /boot/firmware/config.txt" # enable uart
# sudo bash -c "echo 'init_uart_baud=230400' >> /boot/firmware/config.txt" # set baudrate here too # sudo bash -c "echo 'init_uart_baud=115200' >> /boot/firmware/config.txt" # set baudrate here too
# # i2c # # i2c
# sudo bash -c "echo '# I2C Hardware RTC Overlay' >> /boot/firmware/config.txt" # sudo bash -c "echo '# I2C Hardware RTC Overlay' >> /boot/firmware/config.txt"
# sudo bash -c "echo 'dtoverlay=i2c-rtc,ds3231' >> /boot/firmware/config.txt" # sudo bash -c "echo 'dtoverlay=i2c-rtc,ds3231' >> /boot/firmware/config.txt"