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Send simulated telemetry using Raspberry Pi

We will be using Raspberry Pi to send simulated temperature and humidity telemetry for testing purpose. In this workshop, we will be using Python as main language.

Steps

  1. Check if Python is installed. You can verify the current version of Python on your development machine using one of the following commands:

    Python2:

    python --version

    Python3:

    python3 --version

  2. You can download Python by running below commands.

    Python2:

    sudo apt-get install python
sudo apt-get install python-dev

    Python3:

    sudo apt-get install python3
sudo apt-get install python3-dev

  3. Download the sample Python project from https://github.com/Azure-Samples/azure-iot-samples-python/archive/master.zip and extract the ZIP archive.

  4. Make sure Boost Library and OpenSSL library are installed.

    sudo apt-get install libboost-python-dev libcurl4-openssl-dev

  5. Navigate to the root folder of the downloaded sample Python project. Then navigate to the iot-hub\Quickstarts\simulated-device folder.

  6. Open the SimulatedDevice.py file in a text editor of your choice.

    Replace the value of the CONNECTION_STRING variable with the device connection string you made a note of previously. Then save your changes to SimulatedDevice.py file.

    Note

    Make a note of the device connection string, which looks like HostName=<YourIoTHubName>.azure-devices.net;DeviceId=<NameOfYourDevice>;SharedAccessKey={YourSharedAccessKey}.

  7. In the local terminal window, run the following commands to install the required libraries for the simulated device application:

    Python2:

    sudo pip install azure-iothub-device-client

    Python3:

    sudo pip3 install azure-iothub-device-client

  8. In the local terminal window, run the following commands to run the simulated device application:

    Python2:

    sudo python SimulatedDevice.py

    Python3:

    sudo python3 SimulatedDevice.py

    Troubleshoot

    To avoid the import iothub_client error The current version of the Azure IoT SDK for Python is a wrapper over our C SDK. It is generated using the Boost library. Because of that, it comes with several significant limitations. See more details here

    1. Check that you have the right version of Python. Be aware that only certain versions works fine for this sample.
    2. Check that you have the right version of C++ runtime Microsoft Visual C++ Redistributable for Visual Studio 2019. (We recommend the latest).
    3. Verify that you have installed the iothub client: 
      sudo pip install azure-iothub-device-client

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