Just received my 2 DS18B20 !!
I will analyse the term Delta T (ΔT) of the fuel boiler with Blynk, soon !
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I find that they are really good stable sensors for precision, with the odd glitch when reading on long (10+m cables). To minimise blocking the Arduino, I alternatively request the whole chain of DS18B20s to do a reading and then on the next timer call I request the temperature from each one.
yes , I am satisfied , they are very good sensors.
I use timer too, with index so I can read sensors without blocking blynk.
thank you for your interest.