"क्या मारिनस?" या हम Xamarin (Android) पर एक मोबाइल एप्लिकेशन का उपयोग करके ब्लूटूथ के माध्यम से नियंत्रक को नियंत्रित करते हैं

भाग I: परिचय

1. "एक, दो, तीन - क्रिसमस का पेड़ जलाओ!" या CANNY 3 छोटे नियंत्रक पर मेरा पहला नज़र - इस लेख में हमने विश्लेषण किया कि नियंत्रक क्या है, साथ ही साथ CannyLab विकास के वातावरण में काम करने की मूल बातें।
   
2. "डेस्टिनेशन के पास बहुत सारे मार्गदर्शक हैं ..." या हम CANNY 3 छोटे और एक फोटोरिस्टर का उपयोग करके एक दीपक के नियंत्रण को स्वचालित करते हैं - इस लेख में हमने USB वर्चुअल COM-पोर्ट के साथ काम करते हुए, सेंसर को ADC से कनेक्ट करने के साथ-साथ नियंत्रक आउटपुट पर उच्च आवृत्ति वाले PWM को देखा।
   
3. « ...» (CANNY Arduino) Raspberry PI — UART, .
   

भाग II: CANNY 3 छोटे के लिए सर्किट और प्रोग्राम को जोड़ना

भाग III: Xamarin Android अनुप्रयोग लिखना

  <uses-permission android:name="android.permission.BLUETOOTH"/>
  <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:minWidth="25px"
    android:minHeight="25px"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/linearLayout1">
    <TextView
        android:text="Reed switch status - undefined"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/rSwitch"
        android:textSize="12pt" />
    <TextView
        android:text="End sensor status - undefined"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/EndSensor"
        android:textSize="12pt" />
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/startSiren"
        android:text="Send signal to siren" />
    <Switch
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/bltSwitch"
        android:checked="false"
        android:showText="true"
        android:text="Connect bluetooth" />
    <TextView
        android:text="status"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/status" />
</LinearLayout>

// based on http://alejandroruizvarela.blogspot.com/2014/01/bluetooth-arduino-xamarinandroid.html
// for this article https://habr.com/ru/post/500454/


// based on http://alejandroruizvarela.blogspot.com/2014/01/bluetooth-arduino-xamarinandroid.html
// for this article https://habr.com/ru/post/500454/


using Android.App;
using Android.OS;
using Android.Support.V7.App;
using Android.Runtime;
using Android.Widget;
using System.Linq;
using System;
using System.IO;
using Java.Util;
using Android.Bluetooth;
using System.Threading.Tasks;

namespace _6.Canny_Xanarin_Bluetooth_Android
{
    [Activity(Label = "Control Canny 3 tiny via bluetooth", Theme = "@style/AppTheme", MainLauncher = true)]
    public class MainActivity : AppCompatActivity
    {

        Button startSiren;
        TextView rSwitch;
        TextView EndSensor;
        Switch bltSwitch;
        TextView status;
        private Java.Lang.String dataToSend;
        private BluetoothAdapter mBluetoothAdapter = null;
        private BluetoothSocket btSocket = null;
        private Stream outStream = null;
        // don't forget change addres to your device:
        private static string address = "98:D3:91:F9:6C:F6";
        // MY_UUID can be saved as is
        private static UUID MY_UUID = UUID.FromString("00001101-0000-1000-8000-00805F9B34FB");
        private Stream inStream = null;


        protected override void OnCreate(Bundle savedInstanceState)
        {

            base.OnCreate(savedInstanceState);
            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.activity_main);

            startSiren = FindViewById<Button>(Resource.Id.startSiren);
            rSwitch = FindViewById<TextView>(Resource.Id.rSwitch);
            EndSensor = FindViewById<TextView>(Resource.Id.EndSensor);
            status = FindViewById<TextView>(Resource.Id.status);
            bltSwitch = FindViewById<Switch>(Resource.Id.bltSwitch);


            startSiren.Click += startSiren_ClickOnButtonClicked;
            bltSwitch.CheckedChange += bltSwitch_HandleCheckedChange;
            CheckBt();
        }

        private void CheckBt()
        {
            mBluetoothAdapter = BluetoothAdapter.DefaultAdapter;

            if (!mBluetoothAdapter.Enable())
            {
                Toast.MakeText(this, "Bluetooth Off",
                    ToastLength.Short).Show();
            }

            if (mBluetoothAdapter == null)
            {
                Toast.MakeText(this,
                    "Bluetooth does not exist or is busy", ToastLength.Short)
                    .Show();
            }
        }

        void startSiren_ClickOnButtonClicked(object sender, EventArgs e)
        {
            if (bltSwitch.Checked)
            {
                try
                {
                    dataToSend = new Java.Lang.String("11");
                    writeData(dataToSend);
                    System.Console.WriteLine("Send signal to siren");
                }
                catch (System.Exception execept)
                {
                    System.Console.WriteLine("Error when send data" + execept.Message);
                }

            }
            else status.Text = "bluetooth not connected";
        }
        void bltSwitch_HandleCheckedChange(object sender, CompoundButton.CheckedChangeEventArgs e)
        {
            if (e.IsChecked)
            {
                Connect();
            }
            else
            {
                status.Text = "bluetooth not connected";
                if (btSocket.IsConnected)
                {
                    try
                    {
                        btSocket.Close();
                        System.Console.WriteLine("Connection closed");
                    }
                    catch (System.Exception ex)
                    {
                        Console.WriteLine(ex.Message);
                    }
                }
            }
        }

        public void Connect()
        {
            BluetoothDevice device = mBluetoothAdapter.GetRemoteDevice(address);
            System.Console.WriteLine("Connection in progress" + device);
            mBluetoothAdapter.CancelDiscovery();
            try
            {
                btSocket = device.CreateRfcommSocketToServiceRecord(MY_UUID);
                btSocket.Connect();
                System.Console.WriteLine("Correct Connection");
                status.Text = "Correct Connection to bluetooth";
            }
            catch (System.Exception e)
            {
                Console.WriteLine(e.Message);
                try
                {
                    btSocket.Close();
                    System.Console.WriteLine("Connection closed");
                }
                catch (System.Exception)
                {
                    System.Console.WriteLine("Impossible to connect");
                    status.Text = "Impossible to connect";
                }
                System.Console.WriteLine("Socket Created");
  
            }
            beginListenForData();

        }

        public void beginListenForData()
        {
            try
            {
                inStream = btSocket.InputStream;
            }
            catch (System.IO.IOException ex)
            {
                Console.WriteLine(ex.Message);
            }
            Task.Factory.StartNew(() => {
                byte[] buffer = new byte[1024];
                int bytes;
                
                while (true)
                {

                    try
                    {
                        bytes = inStream.Read(buffer, 0, 1024);
                        System.Console.WriteLine("bytes " + bytes.ToString());
                        if (bytes > 0)
                        {
                            
                            RunOnUiThread(() => {
                                string valor = System.Text.Encoding.ASCII.GetString(buffer).Replace("5",String.Empty);
                                // transform string for deleate all symbols except 1-4(command from canny).
                                string command = new string(valor.Where(char.IsDigit).ToArray());

                                if (command.Length > 0)
                                {
                                     status.Text="data successfully readed";
                                    System.Console.WriteLine("command  " + command);
                                    switch (Int32.Parse(command))
                                    {
                                        case 0:
                                            rSwitch.Text = "reed switch - disconnected ";
                                            EndSensor.Text = "end sensor - not pressed ";
                                            break;
                                        case 1:
                                            rSwitch.Text = "reed switch - disconnected ";
                                            EndSensor.Text = "end sensor - pressed ";
                                            break;
                                        case 2:
                                            rSwitch.Text = "reed switch - connected ";
                                            EndSensor.Text = "end sensor - not pressed ";
                                            break;
                                        case 3:
                                            rSwitch.Text = "reed switch - connected ";
                                            EndSensor.Text = "end sensor - pressed ";
                                        break;
                                    }
                                }
                            });
                        }
                    }
                    catch (Java.IO.IOException)
                    {
                        RunOnUiThread(() => {
                            EndSensor.Text = "End sensor status - undefined";
                            rSwitch.Text = "Reed switch status - undefined ";
                        });
                        break;
                    }
                }
            });
        }

        private void writeData(Java.Lang.String data)
        {
            try
            {
                outStream = btSocket.OutputStream;
            }
            catch (System.Exception e)
            {
                System.Console.WriteLine("Error with OutputStream when write to Serial port" + e.Message);
            }

            Java.Lang.String message = data;

            byte[] msgBuffer = message.GetBytes();

            try
            {
                outStream.Write(msgBuffer, 0, msgBuffer.Length);
                System.Console.WriteLine("Message sent");
            }
            catch (System.Exception e)
            {
                System.Console.WriteLine("Error with  when write message to Serial port" + e.Message);
                status.Text = "Error with  when write message to Serial port";
            }
        }


    public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
        {
            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);

            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }
 }

   Button startSiren;
   TextView rSwitch;
   TextView EndSensor;
   Switch bltSwitch;
   TextView status;

  private Java.Lang.String dataToSend;
        private BluetoothAdapter mBluetoothAdapter = null;
        private BluetoothSocket btSocket = null;
        private Stream outStream = null;
        // don't forget change addres to your device:
        private static string address = "98:D3:91:F9:6C:F6";
        // MY_UUID can be saved as is
        private static UUID MY_UUID = UUID.FromString("00001101-0000-1000-8000-00805F9B34FB");
        private Stream inStream = null;

        protected override void OnCreate(Bundle savedInstanceState)
        {

            base.OnCreate(savedInstanceState);
            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.activity_main);

            startSiren = FindViewById<Button>(Resource.Id.startSiren);
            rSwitch = FindViewById<TextView>(Resource.Id.rSwitch);
            EndSensor = FindViewById<TextView>(Resource.Id.EndSensor);
            status = FindViewById<TextView>(Resource.Id.status);
            bltSwitch = FindViewById<Switch>(Resource.Id.bltSwitch);


            startSiren.Click += startSiren_ClickOnButtonClicked;
            bltSwitch.CheckedChange += bltSwitch_HandleCheckedChange;
            CheckBt();
        }

        private void CheckBt()
        {
            mBluetoothAdapter = BluetoothAdapter.DefaultAdapter;

            if (!mBluetoothAdapter.Enable())
            {
                Toast.MakeText(this, "Bluetooth Off",
                    ToastLength.Short).Show();
            }

            if (mBluetoothAdapter == null)
            {
                Toast.MakeText(this,
                    "Bluetooth does not exist or is busy", ToastLength.Short)
                    .Show();
            }
        }

   void startSiren_ClickOnButtonClicked(object sender, EventArgs e)
        {
            if (bltSwitch.Checked)
            {
                try
                {
                    dataToSend = new Java.Lang.String("11");
                    writeData(dataToSend);
                    System.Console.WriteLine("Send signal to siren");
                }
                catch (System.Exception execept)
                {
                    System.Console.WriteLine("Error when send data" + execept.Message);
                }

            }
            else status.Text = "bluetooth not connected";
        }

   void bltSwitch_HandleCheckedChange(object sender, CompoundButton.CheckedChangeEventArgs e)
        {
            if (e.IsChecked)
            {
                Connect();
            }
            else
            {
                if (btSocket.IsConnected)
                {
                    try
                    {
                        btSocket.Close();
                        System.Console.WriteLine("Connection closed");
                    }
                    catch (System.Exception ex)
                    {
                        Console.WriteLine(ex.Message);
                    }
                }
            }
        }

   public void Connect()
        {
            BluetoothDevice device = mBluetoothAdapter.GetRemoteDevice(address);
            System.Console.WriteLine("Connection in progress" + device);
            mBluetoothAdapter.CancelDiscovery();
            try
            {
                btSocket = device.CreateRfcommSocketToServiceRecord(MY_UUID);
                btSocket.Connect();
                System.Console.WriteLine("Correct Connection");
                status.Text = "Correct Connection to bluetooth";
            }
            catch (System.Exception e)
            {
                Console.WriteLine(e.Message);
                try
                {
                    btSocket.Close();
                    System.Console.WriteLine("Connection closed");
                }
                catch (System.Exception)
                {
                    System.Console.WriteLine("Impossible to connect");
                    status.Text = "Impossible to connect";
                }
                System.Console.WriteLine("Socket Created");
  
            }
            beginListenForData();

        }

    public void beginListenForData()
        {
            try
            {
                inStream = btSocket.InputStream;
            }
            catch (System.IO.IOException ex)
            {
                Console.WriteLine(ex.Message);
            }
            Task.Factory.StartNew(() => {
                byte[] buffer = new byte[1024];
                int bytes;
                
                while (true)
                {

                    try
                    {
                        bytes = inStream.Read(buffer, 0, 1024);
                        System.Console.WriteLine("bytes " + bytes.ToString());
                        if (bytes > 0)
                        {
                            
                            RunOnUiThread(() => {
                                string valor = System.Text.Encoding.ASCII.GetString(buffer).Replace("5",String.Empty);
                                // transform string for deleate all symbols except 1-4(command from canny).
                                string command = new string(valor.Where(char.IsDigit).ToArray());

                                if (command.Length > 0)
                                {
                                     status.Text="data successfully readed";
                                    System.Console.WriteLine("command  " + command);
                                    switch (Int32.Parse(command))
                                    {
                                        case 0:
                                            rSwitch.Text = "reed switch - disconnected ";
                                            EndSensor.Text = "end sensor - not pressed ";
                                            break;
                                        case 1:
                                            rSwitch.Text = "reed switch - disconnected ";
                                            EndSensor.Text = "end sensor - pressed ";
                                            break;
                                        case 2:
                                            rSwitch.Text = "reed switch - connected ";
                                            EndSensor.Text = "end sensor - not pressed ";
                                            break;
                                        case 3:
                                            rSwitch.Text = "reed switch - connected ";
                                            EndSensor.Text = "end sensor - pressed ";
                                        break;
                                    }
                                }
                            });
                        }
                    }
                    catch (Java.IO.IOException)
                    {
                        RunOnUiThread(() => {
                            EndSensor.Text = "End sensor status - undefined";
                            rSwitch.Text = "Reed switch status - undefined ";
                        });
                        break;
                    }
                }
            });
        }

  private void writeData(Java.Lang.String data)
        {
            try
            {
                outStream = btSocket.OutputStream;
            }
            catch (System.Exception e)
            {
                System.Console.WriteLine("Error with OutputStream when write to Serial port" + e.Message);
            }

            Java.Lang.String message = data;

            byte[] msgBuffer = message.GetBytes();

            try
            {
                outStream.Write(msgBuffer, 0, msgBuffer.Length);
                System.Console.WriteLine("Message sent");
            }
            catch (System.Exception e)
            {
                System.Console.WriteLine("Error with  when write message to Serial port" + e.Message);
                status.Text = "Error with  when write message to Serial port";
            }
        }


    public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
        {
            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);

            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }
 }

भाग IV: निष्कर्ष