Strange SuperChart export

Solved
1

I’ve just started with Blynk and test its widget boxes.
SuperChart perfectly accepts my data. But it exports it in a strange manner (for me):

I generate 2 data streams with random:

void newGraphValue() {
  int val1 = random(10,20);
  int val2 = random(10,20);

  BLYNK_LOG3(val1," ",val2);
  //updating value display with uptimeCounter
  Blynk.virtualWrite(VPIN_Graph1, val1);
  Blynk.virtualWrite(VPIN_Graph2, val2);
}

In the serial debug window I see integer numbers:

[662849] 10 16
[667849] 18 17
[672849] 11 19
[677849] 19 17
[682849] 13 16
[687849] 17 12
[692849] 10 19

But when I export them I see non integer numbers:

14.5,1571595000000,0
13.75,1571595060000,0
12.75,1571595120000,0
12.083333333333334,1571595180000,0

I’ve seen that Report is suggested instead of SUperChart export.
Unfortunately it provides similar (non integer) results:

2019-10-20 21:10:00,14.5
2019-10-20 21:11:00,13.75
2019-10-20 21:12:00,12.75
2019-10-20 21:13:00,12.083333333333334
2019-10-20 21:14:00,14.166666666666666
2019-10-20 21:15:00,13.166666666666666
2019-10-20 21:16:00,14.416666666666666
2019-10-20 21:17:00,14.25

Could you please clarify?

By the way, there is yet another question:
Export comes to my email with links to the Private IP address (I use my local server in the Docker container).

I guess I need to specify explicitly my server name for this case. Probably server.properties. But which parameter?

I keep my “server.host” blank intentionally to avoid auto generation of certificates as does not work in my case (probably because of the container). So I generate them from the host and provide like
server.ssl.cert=/data/cert/fullchain.pem
server.ssl.key=/data/cert/privkey.pem

Thanks in advance

2

This is because of the minimum 1 minute granularity of SuperChart.
Values received during this one minute period are averaged. This is explained very well in the documentation:

In case you send your data more frequently your values will be averaged. For example, in case you send value 10 at 12:12:05 and than again 12 at 12:12:45 as result in chart you’ll see value 11 for 12:12.

https://docs.blynk.cc/#widgets-displays-superchart

Pete.

3

Oh, thank you very much!
So in real life with less frequent updates actual (integer) data will be exported. Great.