+- OpenMarine (https://forum.openmarine.net)
+-- Forum: OpenPlotter (https://forum.openmarine.net/forumdisplay.php?fid=1)
+--- Forum: How I did it (https://forum.openmarine.net/forumdisplay.php?fid=6)
+--- Thread: Portable 7inch plotter (/showthread.php?tid=6321)
Portable 7inch plotter - Tomek - 2025-06-29
First: many thanks for great job with OpenPlotter! It works!
Because I have no own boat I can use laptop or RPi with OpenPlotter in portable version.
Because RPi is closer to me:
In 2022: version alpha
In 2024: version beta
2025 is running, we will see ;-)
In both I used pressure sensor BMP280, and I had barograph in OpenCPN, but after restart OpenCPN barograph starter from zero and I couldn't see trend. Trend is available via SignalK plugin, but until restart RPi.
I prepared simple script to collect data from SignalK and save into log file, and gnuplot in loop read log.
Now barograph is restart-proof.
Based on observation (I have no numbers, sorry) gnuplot is less CPU consumming than python + matplotlib.
More here: Barograph matplotlibmatp