OpenMarine

Hi,

I am using setting up Node-Red in openplotter to get feed from SignalK and from the 1W DS18B20 sensor, as well as a voltage sensor through MCP3008. I wanted to plot the reading history for the last 24 hours. However I found that there were too many data points. How do I set the sampling or poll frequency in this case? I searched around SignalK setting did not find anything.

Thank you in advance.

Have you considered using influxdb and chronograph/grafana for reading history? in SK-influxdb plugin you can set that frecuency you need.
Install openplotter-dashboards app in openplotter 2

https://flows.nodered.org/node/node-red-...b20-sensor

https://flows.nodered.org/node/node-red-node-pi-mcp3008

(2019-11-27, 12:20 PM)Sailoog Wrote: [ -> ]Have you considered using  influxdb and chronograph/grafana for reading history? in SK-influxdb plugin you can set that frecuency you need.
Install openplotter-dashboards app in openplotter 2

I have not tried that, I will give it a try...thank you.

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(2019-11-27, 12:20 PM)jim321 Wrote: [ -> ]https://flows.nodered.org/node/node-red-...b20-sensor

https://flows.nodered.org/node/node-red-node-pi-mcp3008

thank you. are you suggesting to use "timestamp" as a way to control the frequency?