How to Configure the Asset Tracker to Using external Temp and not Simulated Temp

[RicFlair]

Hey everyone, I am trying to setup the external temp sensor instead of using the simulated data

I modified prj.conf  to:

CONFIG_TEMP_USE_EXTERNAL=y

and Kconfig default to TEMP_USE_EXTERNAL

choice
prompt "Temperature measurement device"
default TEMP_USE_EXTERNAL

I am able to build and flash and run  the program but get the following message.

ASSERTION FAIL [env_sensors[i]->dev] @ ../src/main.c:1034

	Could not get device 

***** Kernel Panic! *****

Current thread ID = 0x20021d5c

Faulting instruction address = 0x61166


Where in the config do I define the pins id like to use for the external sensor connected?

Thanks!

[Jan Tore Guggedal]

Hi,

In addition to CONFIG_TEMP_USE_EXTERNAL, you will also need to provide the device name for your temperature sensor with the config CONFIG_TEMP_DEV_NAME="your-dev-name".

You will also need to tell the build system where your device is attached, and how it's configured. An example for this can be found in this thread:
https://devzone.nordicsemi.com/f/nordic-q-a/42146/migrating-a-design-from-raspberry-pi-zero-to-nrf9160-dk---need-i2c-and-spi-interfaces/176867#176867

Note that the asset tracker assumes that the temperature device has a driver in Zephyr, and that it can also provide humidity and air pressure data. If your sensor can't do that, you can remove the those sensors from the "available sensors" list:
https://github.com/NordicPlayground/fw-nrfconnect-nrf/blob/master/applications/asset_tracker/src/main.c#L140

And from the list of environment sensors:
https://github.com/NordicPlayground/fw-nrfconnect-nrf/blob/master/applications/asset_tracker/src/main.c#L167

Hopefully this gets you started.
Best regards,
Jan Tore