This is an old revision of the document!


Bits and pieces I want to be able to grab quickly. This page will change frequently.


/usr/local/bin/ntplogtemp -o -l /chronyLogs/temps
sed '/ZONE0/d' -i /chronyLogs/temps
sed '/sensor/d' -i /chronyLogs/temps
sed -i 's/LM0/CPU/g' /chronyLogs/temps
sed -i 's/LM1/CPU/g' /chronyLogs/temps

Quick Pi ID

Easy way to get a quick visual indicator to ID a Pi you're remoted into:

Blink pwr LED at 1Hz:

echo timer | sudo tee /sys/class/leds/led1/trigger

Set pwr LED back to monitor voltage:

echo input | sudo tee /sys/class/leds/led1/trigger

Build GPSD

scons target_python=python3.7 pps=yes bluez=no tsip=no tripmate=no tnt=no \
superstar2=no skytraq=no sirf=no oncore=no navcom=no mtk3301=no itrax=no \
geostar=no fv18=no fury=no evermore=no earthmate=no ashtech=no aivdm=no

Disable GUI Ubuntu/Debian

sudo systemctl set-default multi-user

Raspberry Pi Heartbeat


chrony.conf sock sources

Still having issues getting these to work…

refclock SOCK /tmp/chrony.ttyS0.sock refid GPS precision 1e-1 offset 0.9999
refclock SOCK /tmp/chrony.pps0.sock refid PPS precision 1e-7


chronyc tracking

-m flag combines commands. For example: sources -v, tracking, sourcestats -v

chronyc -m 'sources -v' tracking 'sourcestats -v'
scraps.1626891364.txt.gz · Last modified: 2021/07/21 18:16 by john
Driven by DokuWiki Recent changes RSS feed Valid CSS Valid XHTML 1.0