2025-06-29, 07:14 PM
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
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