I have a zigbee plug that offers a data point of the total energy consumed, e.g. of my TV.
Example: At the beginning of the first month the value is 0 kw/h, at the end of the first month the value is 30 kw/h. At the beginning of the second month the value is 30 kw/h, at the end of the second month the value is 50 kw/h.
What I would like to display in Grafana is 30 kwh/h for the first month and 20 kw/h for the second month.
I am struggling in writing an approprate Flux query for this.
Can anybody point me in the right direction?