Now is better.
Memory usage has improved a lot. Now the program takes about two times less MB. Great.
There is someting, not important, but is annoying. On the web page “time of next update” shows always 00:00
“LAST READING AT TIME: 19:25 DATE: 15 May 2019, time of next update: 00:00”
Other issues I have not noticed at the moment.
Once again - thanks.