Nordic nRF9160 Development Kit example

This example application runs out of the box on the Nordic nRF9160 Development Kit. It uses the LTE-M modem of the nRF9160 to transmit messages to a CoAP endpoint using DTLS.

The device uses DTLS with a pre-shared key to authenticate against the Drogue IoT Sandbox.

Prerequisites

Hardware

  • Nordic nRF9160 Development Kit

Software

Make sure you have the latest versions (cargo install <tool>) of these tools:

  • rustup - To compile the example with the correct toolchain.

  • probe-rs-cli - To flash the Secure Partition Manager to load applications from the secure mode.

  • probe-run version 0.3.3 - To run the example. NOTE: Some version of probe-run does not work with this board.

Configuring

Your device credentials will come from these entries in ~/.drogue/config.toml:

username = "..."
password = "..."

For Drogue Cloud, the username is stored in this form: device_id@application.

The example config.toml file for connecting to public Drogue cloud sandbox application could look like this:

hostname = "coap.sandbox.drogue.cloud" # Replace with your own Drogue Cloud instance if you are not using the sandbox
port = "5684"
username = "device1@coap-workshop"
password = "mysecretpassword"
Make sure to create your application and device is created in Drogue Cloud with the correct credentials (Make sure you use pre-shared keys.)

Running

  1. Download the bootloader and flash it to the device:

    probe-rs-cli download zephyr.hex --chip nRF9160_xxAA --format Hex

  2. Flash and run the application running the following command:

    cargo run --release

    This will flash the application and show the debug output as the application is running.