I measure the values for air pressure (blue) and humidity (orange) with a bme280 sensor.
Problem:
Superchart doesn’t show max values when week or month range is selected. For example i had a reading of 60% humidity, which is seen in the 1d graph. When i select 1week range, the max value is 54%. Where is the 60% value?
Is there some averaging going on in the background? Is this a bug?
1 week shows average humidity per hour and not min/max. We actually implemented functions for the datastream many days ago. @Pavlo maybe it is time to introduce them?
why on earth would you want that? If you have 1m updates or even 1s udates and you select the 1y overview, how do you think the graph would look like? Graphs are meant to give you a general insight in what’s happening. If you also want to track extremes, then create a second data set where the max/min value per day is stored and you put that in a graph as well.
@wolph42 well, it always better when you have 1 stream and change the view aggregation depending on your current needs. Otherwise you have to change code every time you decided to change something.
that’s true, but is that also possible? Say that I’ve been monitoring a hen house (don’t know where that came from) for humidity and temp for the past year and I want to check whether any extremes occured in that year. Can I access that data through blynk? Or could I make an extraction of e.g. max/min per day based on the data set/ Either in the code or through the app?
And yes I’m aware of the awesome report feature Blynk now has!! but i haven’t used it yet so I don’t know whether you can do with that that which I just described
yes, ok, but that means that this ‘extreme’ check needs to be done in excel (or somesuch) as the data is sent to your e-mail. Its not possible to access that data in your code, parse it and then show the result in the app?
The timeline of the graph should be expandable/stretch to see the values for the day.
Of course, the best thing would be to have a function for the max/min value per day which is stored on the blynk servers extracted from the main stream.
In short: The resulting file is an archive (actually link to it), sent to your mailbox with .csv files for every Vpin requested, for a timespan required (last day, last week and last month to choose from). The basic difference between “three dots” and the reporting widget is the correct time stamp applied - in human readable format. One more: reports can be set to be created automatically in a repeatable manner.
@Dmitriy@Pavlo Still loving the platform and it’s working great - it would be excellent to have the option to graph the MAX or Last Values for each timeframe.