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--- timehat:software_03-2025 [2025/03/16 01:20] – [General] millerjs
+++ timehat:software_03-2025 [2025/03/16 01:38] (current) – [System Status Web Page] millerjs
@@ Line 20: / Line 20: @@
   * RAM usage is minimal, any Pi can run this setup, adding more RAM will not improve performance.
+===== System Status Web Page =====
+To provide users with a quick snapshot of the status of the TimeHat system, I created a simple web page that shows things like the system uptime, temperature from the CPU and RTC, chrony status, gpsd status, and current satellite map and historical satellite heat map.
+{{ :timehat:timehatstatusdash.png?800 |}}
+This page is updated every five minutes by the ''TimeHatInfoGetter.py'' script, which runs as a cron job by the root user:
+''*/5 * * * * /root/TimeHatInfoGetter.py >/dev/null 2>&1''
+This script generates two JSON files which are placed in ''/var/www/html/'' - ''timehatstats.json'' and ''satplot.json''. The first is where the general system information is stored, and the second is where the heatmap log is stored. Check out the examples below. The main configurable parameter of the info getter python script is whether or not to obfuscate the location. Some users may choose to expose this on the public web, but not want to share their precise location. The obfuscation routine simply truncates the latitude and longitude to two decimal places. E.g. - 44.1234567 gets trimmed to 44.12.
+==== script ====
+==== HTML ====
+==== example JSON ====
 ===== Config Files =====
-=== config.txt ===
+==== config.txt ====
 ''/boot/firmware/config.txt''
@@ Line 53: / Line 69: @@
 force_turbo=1
 </file>
+==== gpsd ====
+''/etc/default/gpsd''
+<code>
+GPSD_OPTIONS="-n -p"
+DEVICES="/dev/ttyAMA0"
+</code>
+==== gpsd.service ====
+''/etc/systemd/system/gpsd.service''
+<code>
+[Unit]
+Description=GPS (Global Positioning System) Daemon
+Requires=gpsd.socket
+# Needed with chrony SOCK refclock
+After=chronyd.service
+[Service]
+Type=forking
+EnvironmentFile=-/etc/default/gpsd
+EnvironmentFile=-/etc/sysconfig/gpsd
+ExecStart=/usr/local/sbin/gpsd $GPSD_OPTIONS $OPTIONS $DEVICES
+[Install]
+WantedBy=multi-user.target
+Also=gpsd.socket
+</code>
+==== chrony.conf ====
+ ''/etc/chrony.conf''
+<code>
+server time-a.nist.gov
+server time-a-wwv.nist.gov
+server time-a-b.nist.gov
+refclock SOCK /run/chrony.ttyAMA0.sock refid GPS
+rtcsync
+logchange 0.5
+local stratum 10
+makestep 1.0 3
+logdir /var/log/chrony
+log statistics tracking
+dumpdir /var/log/chrony
+driftfile /chrony.drift
+allow
+</code>
+==== chronyd.service ====
+''/etc/systemd/system/chronyd.service''
+<code>
+[Unit]
+Description=chrony, an NTP client/server
+Documentation=man:chronyd(8) man:chronyc(1) man:chrony.conf(5)
+Conflicts=openntpd.service ntp.service ntpsec.service
+Wants=time-sync.target
+Before=time-sync.target
+After=network.target
+[Service]
+Type=forking
+ExecStart=/usr/local/sbin/chronyd -f /etc/chrony.conf
+[Install]
+Alias=chronyd.service
+WantedBy=multi-user.target
+</code>

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