Delta diagram

Configuration Frontend
1

I have managed to get the reading from our gas meter into a sensor.

sensor:
  - platform: mqtt
    name: gaszaehler
    unit_of_measurement: 'm³'
    icon: 'mdi:counter'
    state_topic: vb-home/gas/counter

If I click on that sensor, I get a diagram of the counter readings showing the stairs of the rising counter.
But I want to see the deltas (the hourly or daily consumption) between the values not the absolute values.

Is it possible to get such a graph with on board tools or do I need to use external programs?

2

You should be able to do all that within HA, some combination of these could do it:

1 Like
3

After some hours of thinking and trying something I must say that I have no idea, how to combine these three sensors to get any useful result.

  • The statistics sensor is useless without any detailed description: From where (which values) does it take its input? (What does 'number of samples mean? From which moment does the max_age count?) How do I access the change value? (I think that is what I need).
  • The history statistics sensor seems to be useless for this, since it can only return time spans, ratios or counts of boolean values.
  • The template sensor may be the correct tool to get the change attribute from the statistics sensor. But since I don’t know how to use the statistics sensor …

I thought calculating the consumption from a vector of counter values would be a simple an also very common task (in SQL it would be a simple query of maybe 10 lines, in python that could also be done in less than 10 lines of code) but with these badly described tools, … ??? These description are at most a memory aid for someone who had already used these tools many many times.

As I said: I have no idea how to begin.

Are there any examples how to do this or at least something similar?

4

From the history of the entity it is tracking.

From the time that the stats are generated.

5

image
any luck yet? Ihave the same issue, and I want a bar graph in a time-frame of 15 minutes.

gr. Remco

6

I tried out a little trick, under helpers, I created a utility meter, with a an automatic reset. This seems to do what i (and everyone in this thread) wants. Useable for inputs for a gauge on a dashboard too.

Current gasusage is almost nothing, mostly the pilot light of the heater and occasional warm water.

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