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  • Case ID: 284894
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Connecting ds18b20 to nrf9160dk

nrffan18

Hi, 

I am looking to connect the ds18b20 sensor to the nrf9160dk. I followed this post, but when I tried running it, I was getting a "create_nordic_project.py failed (1)" saying "error: cmake failed". 

I am a complete beginner when using the development kit so please bear with my questions. 

I have added "CONFIG_GPIO" in the prj.conf file, is there anything else I should be adding. 

Additionally, should I be making changes to the cmake file? The link above only mentioned the .c and .h file so I wasn't sure what else should be changed. 

If anyone could help me with this or could point me to resources that will help me solve this, I would really appreciate it. 

Update : The code is now running without any build errors but not printing any values. I had been using the hello_world sample to run it before which was giving the error, but then I tried switching to the blinky sample and running on that and it's building and running without any errors. (Would anybody know why this is).

My issue now is that it is not printing any values or anything to the Debug terminal on SES or the LTE Link Monitor. Does anyone know why this may be?

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    Hello Nandini,

    nrffan18 said:
    I'm assuming I should be adding it with the label "GPIO_0" since that was what was configured in the initial function in ds18b20.c file?

    My recommendation would be to connect the GPIO pin you would like to use to a LED on the nRF9160 DK first, as demonstrated in the Blinky sample. This way you can verify that the devicetree configuration of your application is correct. Afterwards, you can switch the pin direction and check if the sense mechanism works as expected.

    nrffan18 said:
    Does anyone have any idea on how to fix this? I do not have access to a logic analyzer right now.

    Since you would like to implement a sensor driver which not directly is integrated into the Zephyr RTOS, I recommend you to verify the dataflow on the configured pin with a logic analyser or oscilloscope.

    Regards,

    Markus

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  • 0

    Hello Nandini,

    nrffan18 said:
    I'm assuming I should be adding it with the label "GPIO_0" since that was what was configured in the initial function in ds18b20.c file?

    My recommendation would be to connect the GPIO pin you would like to use to a LED on the nRF9160 DK first, as demonstrated in the Blinky sample. This way you can verify that the devicetree configuration of your application is correct. Afterwards, you can switch the pin direction and check if the sense mechanism works as expected.

    nrffan18 said:
    Does anyone have any idea on how to fix this? I do not have access to a logic analyzer right now.

    Since you would like to implement a sensor driver which not directly is integrated into the Zephyr RTOS, I recommend you to verify the dataflow on the configured pin with a logic analyser or oscilloscope.

    Regards,

    Markus

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