DS18B20 with nRF9160

RE: DS18B20 with nRF9160

helsing — Thu, 04 Nov 2021 13:21:20 GMT

Hi Ander, sorry for the late reply.

Have you tried probing the GPIO line, for example with a logic analyzer or oscilloscope?

Best regards,

Håkon

RE: DS18B20 with nRF9160

isurki — Thu, 28 Oct 2021 07:32:30 GMT

Hi,

Any updates on this topic?

Best regards.

RE: DS18B20 with nRF9160

isurki — Fri, 22 Oct 2021 09:48:32 GMT

Hi Håkon,

I am using an Actinius Icarus, based on nRF9160. Gpio voltage is 3.3V there.

I have run discover_fake_DS18B20.ino Arduino sketch and the results suggest that my DS18D20 is genuine:

I have also tested a regular Arduino Uno sketch to read temperature values, and I get accurate values:

Thanks for your help, best regards,

Ander.

RE: DS18B20 with nRF9160

helsing — Fri, 22 Oct 2021 09:22:24 GMT

Hi Ander,

Is the IO voltage on nRF9160 DK set to 3.0V, or 1.8V? You may also set the board to for instance 3.3V by applying 3.3V to VIO_REF after you apply VDD to the board.

When looking for relevant material for the sensor, I stumbled upon this interesting article, warning against counterfeit DS18B20. Verifying that you have an authentic part might be a good place to start: https://www.radiolocman.com/review/article.html?di=621315

Best regards,

Håkon

RE: DS18B20 with nRF9160

helsing — Fri, 22 Oct 2021 09:03:10 GMT

Hi Ander,

I will be looking into this and get back to you over the weekend.

Best regards,

Håkon