Example: Simple flux query for VSCP data

This diagram (using charts from charts.js) displays real time wind direction data which is fetched from a local server here at the Grodans Paradis AB office. The wind direction in this sample comes from a Weather Meter Kit bought from Sparc Fun. The displayed graphics is the direction for the last hour.

The data from the wind vane (a voltage) is collected by a CAN4VSCP Vilnius module and sent over a CAN bus to a VSCP Daemon. This daemon export the voltage reading to a MQTT broker and from the MQTT broker a node-red flow read the value and transform it to a wind direction. This wind direction is feed back to the MQTT broker and is also written to a influxdb bucket.

You can look at the raw wind vane voltage events by subscribing to the VSCP demo broker at topic vscp/25:00:00:00:00:00:00:00:00:00:00:00:05:01:00:03/15/2/#

            mosquitto_sub -h demo.vscp.org -u vscp -P secret -t vscp/25:00:00:00:00:00:00:00:00:00:00:00:05:01:00:03/3/15/2/0

You can look at the wind vane direction events by subscribing to the VSCP demo broker at topic vscp/25:00:00:00:00:00:00:00:00:00:00:00:05:00:01:04/4/1040/30/0/#

            mosquitto_sub -h demo.vscp.org -u vscp -P secret -t vscp/25:00:00:00:00:00:00:00:00:00:00:00:05:00:01:04/4/1040/30

Update the page with the F5 key to get the latest reading.

Source for the demo is available here

Back to main demo page

Simple linear diagram displaying wind direction data from an influxdb server using flux