ECM3440-residential-iot1

IoT DevOps workshop 1

In this first session we will set up a simple Azure IoT project and start preparing a CI/CD pipeline using GitHub and Travis-CI

The IoT example project is taken from https://github.com/microsoft/IoT-For-Beginners/

VS Code

In the VS Code IDE install the Azure IoT Tools extension. This is a collection of addons that simplifies working with Azure IoT features.

Make sure you also have the Python extension installed too.

Azure IoT Hub

Create an IoT hub using the Azure portal. https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-create-through-portal Be sure to select the Free Tier in the management screen.

You can do this from the command line, see https://github.com/microsoft/IoT-For-Beginners/blob/main/2-farm/lessons/4-migrate-your-plant-to-the-cloud/README.md

Rather than install the Azure CLI you might prefer to use the Cloud Shell in the Azure Portal.

CounterFit

Install the CounterFit IoT sensor simulator. https://github.com/ExeterBScDTS/CounterFit

cd soil-moisture sensor
python3 -m pip install -r requirements.txt

Check that it is installed correctly.

python3 -m CounterFit

Quit by typing CRTL-C in the terminal.

Soil moisture sensor virtual sensor

Before you can use the virtual sensor (or a real sensor if you have the hardware) you need a connection string. This is like the string you would use to connect to a database.

See https://github.com/microsoft/IoT-For-Beginners/blob/main/2-farm/lessons/4-migrate-your-plant-to-the-cloud/README.md for full details.

In the Cloud Shell you can create an identity for your device with.

az iot hub device-identity create --device-id soil-moisture-sensor --hub-name <hub_name>

Then get the connection string with.

az iot hub device-identity connection-string show --device-id soil-moisture-sensor \
 --output table \
 --hub-name <hub_name>

Copy the string into app.py

Now start CounterFit and add a soil moisture sensor. See https://github.com/microsoft/IoT-For-Beginners/blob/main/2-farm/lessons/2-detect-soil-moisture/virtual-device-soil-moisture.md

And now run app.py

Check for messages in the IoT hub

Use the Azure Cloud Shell to see the messages being received.

az iot hub monitor-events --hub-name <hub_name>

Did it work?

If it did, then the next thing to do is create your own project repository.

If it didn't, fix it!