issues with DS18B20 sensors

Sensors Environmental
1

I am having issues with DS18B20 sensors and getting them to work with the Artemis platform, very similar to what is reported here: https://github.com/sparkfun/Arduino_Apollo3/issues/409

I am really surprised that so wildly different values of the pullup are needed according to the issue there. Any idea why?

I have read at several places that there are a lot of cheap copies of the DS18B20 that are sold “as if they were” DS18B20, but have lower performance, quirks, etc. I was wondering, how are your DS18B20 sourced? Are you sure that they are genuine? Do you have traceability on these?

2

Which SparkFun part number are you using?

3

Should be 11050: https://www.sparkfun.com/products/11050

4

We can’t be absolutely sure those are genuine DS18B20 parts, you might give SEN-00245 a try and see if you have the same problems, those are definitely the real McCoy.

5

Ok, thanks! Actually, done some accuracy tests and the performance is really good, so now that I figured out that I need slightly weird pullup values I am happy anyways :slight_smile: .