Monitoring, measuring and logging data from a high precision 10MHz GPS disciplined oscillator (GPSDO)
This project is no longer in use by me, but have a look for inspiration.
I am still using an RPi (the classic model b) to monitor the output of a script that is used in the GPSDO. This script outputs a line of data every second. The TxD pin of the Nano that is used in the GPSDO is brought out and is monitored by an RPi. The RPi runs two scripts, one to capture the serial data, and a second script that runs at mid-night, compresses the log file and sends me an e-mail with the collected results. I then use Excel to plot the data in graphs that gives me an idea of the stability of the GPSDO. I use the same scripts on another RPi to collect the data from my Reciprocal Counter, that also uses an GPSDO inside as the master reference clock. Here are the scripts for the RPi:
ser_mon_gpsdo.py : this collects the serial pin RxD data
ser_mon_gpsdo.service : this systemd script installs the Python script at boot time
mail_gpsdo_log.py : this is the e-mail script that is activated by cron at mid-night.
contab : this is the crontab for all the scipts on the original project, select the ones you need for the gpsdo.
The files I uploaded are files that work, but may still undergo changes. During this process, I will overwrite the files with a newer version, and will NOT keep the old ones here.
Details are or will be in my Blog. http://www.paulvdiyblogs.net/2020/10/monitoring-measuring-logging-gpsdo.html
Versions of the pdf diagrams I am now working from are called V2. Look at the Blog for more details.
Note that all these files are bound to change!