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

Jan Tore Guggedal — Wed, 03 Apr 2019 18:30:47 GMT

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