Question about the ds18b20 temperature sensor

[ebda3]

Do you trust ds18b20 sensor? Give me advice

[PeteKnight]

@ebda3

It is a unit manufactured with international standards made in Turkey, not a local manufacture dedicated to preserving the corona vaccine

I don’t really understand what you’re saying here.
As I said before…

@PeteKnight

You’re wasting your time unless you have a calibrated reference thermometer.

Pete.

[ebda3]

@PeteKnight

I don’t really understand what you’re saying here.
As I said before…

I mean, the refrigeration unit is equipped with a high-precision temperature sensor. The cooling unit is designed to save the corona vaccine. I don’t think there could be a mistake in its temperature sensor. It’s very accurate

[ScottB]

Where is the DS18B20 physically, relative to the reefer temperature sensor? In addition, since you are monitoring a temperature that is controlled to be fixed, you could use an offset if nothing else works. Then the issue is what is the variation on the 18B20 with time? Calling it too often will raise its temperature as well.

[fthmd]

Hi,
I wonder the last situation. How did you solved the problem? I have a similar situation here with NodeMCU. I have connected Ds18b20 but, in room temperature i read 73 Celcius. Actually, beside this, i am trying to learn out of range notification settings “in coding” with Blynk.

[John93]

@fthmd

I have connected Ds18b20 but, in room temperature i read 73 Celcius.

Post your sketch so we can take a look at it.

@fthmd

i am trying to learn out of range notification settings “in coding” with Blynk

Read this

Events, Notifications and the use of "Flag" variables

Update 19th May 2022 - you’ll see references to a limit of one event per minute in this tutorial. It appears that this limit has now been removed. I’ve not yet tested this myself, and when I do I’ll update the tutorial to reflect my findings. I’m seeing quite a few posts from people who are finding it difficult to get notifications working in Blynk IoT, and who don’t understand how to use “flag” variables to limit the number of notifications that are sent for any given alert situation. I thoug…