If you need history you need to use InfluxDB, once you have your data stored in influxDB you can use InfluxDB dashboards to show your data or use grafana to read from influxDB.
I do not have time to write an InfluxDB manual but it is really intuitive, you just need to install IndluxDB from openplotter-dashboard app, after installtion go to http://localhost:8086, follow instrucctions to create a user, an organization, a bucket for your data and a token to read/write your bucket. Finally go back to openplotter-dashboard, select InfluxDB OSS, click edit and add the desired Signal K keys to store and the intervals. To check your stored data go to http://localhost:8086, click "Explore" and build your dashboards.
Tips:
Create one token to read/write all buckets.
Create different buckets with different data retention policy to save your SD space.
Be conservative with the intervals, you do not need to check the Signal k server every 5 seconds for air pressure, probably 10 minutes is OK.
I do not have time to write an InfluxDB manual but it is really intuitive, you just need to install IndluxDB from openplotter-dashboard app, after installtion go to http://localhost:8086, follow instrucctions to create a user, an organization, a bucket for your data and a token to read/write your bucket. Finally go back to openplotter-dashboard, select InfluxDB OSS, click edit and add the desired Signal K keys to store and the intervals. To check your stored data go to http://localhost:8086, click "Explore" and build your dashboards.
Tips:
Create one token to read/write all buckets.
Create different buckets with different data retention policy to save your SD space.
Be conservative with the intervals, you do not need to check the Signal k server every 5 seconds for air pressure, probably 10 minutes is OK.