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Forum Index : Microcontroller and PC projects : Having trouble with DS18B20's ?

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Joined: 07/10/2011
Location: Australia
Posts: 1220
Posted: 12:08pm 19 Nov 2019
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Here's an article  about the almost ubiquitos fake DS18B20's that are around now - interesting read. If you're having trouble with yours it may give you the reasons.



Joined: 03/01/2018
Location: Australia
Posts: 684
Posted: 01:27pm 19 Nov 2019
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Thanks for that

I normally get mine from RS but I did buy a bunch from EBay a good while ago & they were complete duds.
Checked out more like a re-branded transistor than an 18B20.
Put me off buying the cheap ones.


Senior Member

Joined: 25/07/2019
Location: Germany
Posts: 273
Posted: 03:33pm 19 Nov 2019
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Thanks for telling us!

I guess those cheap fakes I already got will still do their job for testing set-ups generally but for final tasks I rather take the real ones.
Andre ausdre durchdre

Joined: 27/03/2016
Location: Australia
Posts: 1651
Posted: 08:06pm 20 Nov 2019
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Not another thing to look out for.....

Would like to the a more concise way of testing.
The article mentions they contain no EEProm.

Does that mean some simple code could be written for testing.

All my stocks here are from 2 to 3 years back & been working fine.

That's not to say I won't need a few new ones, & particularly the waterproof probe type....


Joined: 19/02/2018
Location: United Kingdom
Posts: 9
Posted: 01:36pm 11 Dec 2019
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Got a waterproof from Amazon, couldn't read directly with tempr, needed to use tempr start, then tempr
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