63 lines
2.8 KiB
Markdown
63 lines
2.8 KiB
Markdown
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# Influx-DB frequency logger with JDS6600 signal generator
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A simple python script to write measured frequency values into a Influx-DB database.
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## Python installation on Ubuntu
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```
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sudo apt-get update
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sudo apt-get install python3
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sudo apt-get install python3-pip
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```
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## Python Dependencies:
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```
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pip install pyserial
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pip install influxdb
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```
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## running the script (automatically)
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The script is auto-detecting the USB-port, where the signal generator is connected to. After that it connects to a Influx-DB-server and then publishes the measured frequency value every second to this server. Make sure to fill your login credentials into the `influxdb_config.py`-file.
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To auto start the script at the sotartup of the server we configure a systemd-service. I assume the repository with this script is cloned into the home directory of one user.
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```
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sudo nano /etc/systemd/system/readfreq_influxdb.service
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```
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Write into this file:
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```
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[Unit]
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Description=readfreq_influxdb python script
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After=multi-user.target
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[Service]
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Type=simple
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Restart=always
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RestartSec=5
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ExecStart=/usr/bin/python3 /home/user/software_python/readfreq_influxdb.py
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StandardOutput=syslog
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StandardError=syslog
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[Install]
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WantedBy=multi-user.target
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```
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No the autostart can be activated:
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```
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sudo systemctl enable readfreq_influxdb.service
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sudo systemctl start readfreq_influxdb.service
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sudo systemctl status readfreq_influxdb.service
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```
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To deactivate it, use the command `sudo systemctl disable readfreq_influxdb.service`.
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# Sources/useful links:
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- Python Lib (MIT License): https://github.com/on1arf/jds6600_python
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- https://github.com/thomaseichhorn/funcgen
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- https://www.thomaschristlieb.de/ein-python-script-mit-systemd-als-daemon-systemd-tut-garnicht-weh/
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<br><br>
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<p xmlns:dct="http://purl.org/dc/terms/" xmlns:cc="http://creativecommons.org/ns#" class="license-text">This work by <span property="cc:attributionName">Dustin Brunner</span> is licensed under <a rel="license" href="https://creativecommons.org/licenses/by/4.0">CC BY 4.0<img style="height:15px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/cc.svg?ref=chooser-v1" /><img style="height:15px!important;margin-left:3px;vertical-align:text-bottom;" src="https://mirrors.creativecommons.org/presskit/icons/by.svg?ref=chooser-v1" /></a></p>
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<a rel="license" href="http://creativecommons.org/licenses/by/4.0/"><img alt="Creative Commons Lizenzvertrag" style="border-width:0" src="https://i.creativecommons.org/l/by/4.0/88x31.png" /></a><br />Dieses Werk von <span xmlns:cc="http://creativecommons.org/ns#" property="cc:attributionName">Dustin Brunner</span> ist lizenziert unter einer <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Namensnennung 4.0 International Lizenz</a>.
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