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sampling frequency
#1
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.
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#2
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
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#3
https://flows.nodered.org/node/node-red-...b20-sensor

https://flows.nodered.org/node/node-red-node-pi-mcp3008
mare liberum
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#4
(11-27-2019, 07:20 AM)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.

(11-27-2019, 07:20 AM)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?
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