Skip to content

Latest commit

 

History

History
57 lines (50 loc) · 2.46 KB

03_pi_app.md

File metadata and controls

57 lines (50 loc) · 2.46 KB

Let's run the application

In the folder 'raspberrypi_app' you will find the application we want to run on our Pi, so it sends us the temperature data we wish to collect. This is a node.js application and you need to set up your Pi so the application can be run there.

Prepare your Pi

  1. Connect to your Pi, if you are not already connected to it via SSH, remote desktop or by attaching desktop, mouse and keyboard. If you are connected to it via the last two options, please open a terminal.
  2. In the Bash navigate to root of this repo - AzureIotHack and pull any changes. 
    git pull

Run the application

  1. Now you are going to need the Azure IoT Hub connection string. It might still be stored in the shell on your local machine. Copy it! 
    echo $connection
    If it is not get the connection string again: 
    az iot hub device-identity connection-string show --device-id myPi --hub-name $prefix'iotpihub' --output tsv
    In the bash of your Pi paste the string: 
    export DeviceConnectionString="<YOUR CONNECTION STRING>"
  2. We need to install a package for our code to work on your Pi. 
    pip3 install azure-iot-device
    If you cannot use 'pip' or 'pip3' on your Pi install it entering the following: 
    sudo apt install python3-pip
  3. Now we can run the application. Make sure you are in the 'raspberry_app' folder and run the following: 
    python3 temphumid.py
    Temperature and humidity data are send to the Azure IoT Hub and displayed on the Sense Hat's LEDs.
  4. The data from your Sense Hat is now sent to Azure. But we still need to connect it to our Machine Learning service.

Check the IoT Hub

  1. To see what is happening in the Azure IoT Hub navigate to the Azure portal. There, find your Azure IoT Hub. On the Overview site you will see the messages received: See the Overview site of the Azure IoT Hub
  2. Let's open the Azure Cloud Shell: Image of the upper bar in the Azure portal with focus on the Cloud Shell icon
  3. There enter the following to see the messages comming in: 
    az extension add --name azure-iot
    az iot hub monitor-events --hub-name $prefix'iotpihub'
  4. In the terminal of your Pi press ctrl + C to stop the device from sending the data to Azure.

Go to the next steps