Register raspberry pi to azure via c#

Question

I am developing a simple app that need to send and receive some data from azure. First of all, I have worked with a simulated device(and console app). I have configured my azure portal to work with the this data and everything works well.

At the same time, I checked my sensor with unit-tests and it works fine too. Now, I want to send some data from my sensors to azure(with Universal App). I tried to work with this link: https://blogs.windows.com/buildingapps/2016/03/03/connect-your-windows-app-to-azure-iot-hub-with-visual-studio/#BgxLrRq1bXolCitM.97

I choose the device that I worked with in the simulated device and got an error of "unknown host" for the client connect. Do I need to register my raspberry pi as a device before? How I can send a simple string from known universal app (ie: https://developer.microsoft.com/en-us/windows/iot/samples/helloblinky ) to azure?

I am working with Windows 10 IOT, c#

Thanks!

Update: I tried to do all what you suggested without success. Relavant code:

    public static async Task SendDeviceToCloudMessageAsync()
    {
        CreateClient();

        var currentTemperature = 20 /*getCurrentTemperature()*/;
        var currentHumidity = 20/*getCurrentHumidity()*/;

        var telemetryDataPoint = new
        {
            deviceId = DeviceId,
            plantID = 7,
            temperature = currentTemperature,
            humidity = currentHumidity,
            userId = 1
        };
        var messageString = JsonConvert.SerializeObject(telemetryDataPoint);
        var message = new Message(Encoding.ASCII.GetBytes(messageString));
        message.Properties.Add("temperatureAlert", (currentTemperature > 30) ? "true" : "false");

        Debug.WriteLine("{0} > Sending message: {1}", DateTime.Now, messageString);

        await deviceClient.SendEventAsync(message);
    }

I don't know how to validate the "sharedAccessKey" on connectionString var

Error( on await deviceClient.SendEventAsync(message) line ): Exception thrown: 'System.Exception' in System.Private.CoreLib.ni.dll No such host is known. (Exception from HRESULT: 0x80072AF9)

Answer 1

You will need to do two things here.

First up, connect your device. Details here - https://developer.microsoft.com/en-us/windows/iot/docs/ConnectDeviceToCloud

Second, connect your app. - https://developer.microsoft.com/en-us/windows/iot/docs/ConnectAppToCloud

If you run into issues when doing the above two, then, you will be able to ask more specific questions.