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POUnable to receive values more than 255 on Android device from Arduino
 

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  1. POUnable to receive values more than 255 on Android device from Arduino
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    <p>I am developing an application to receive data on an Android device from an Arduino. It displays values only up to 255 when I convert it to integer, but I want those values which are sent by the Arduino board. I have tried converting them to strings but that didn't work either.</p> <p>How can I solve this problem?</p> <p>Here's the code running on the Android device: </p> <pre><code>package pkg.MultipleDataReceiveFromArduinoArray; import java.io.FileDescriptor; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import pkg.MultipleDataReceiveFromArduino.R; import android.app.Activity; import android.app.AlertDialog; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.os.ParcelFileDescriptor; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; import com.android.future.usb.UsbAccessory; import com.android.future.usb.UsbManager; public class MultipleDataReceiveFromArduinoActivity extends Activity implements Runnable { private TextView txtReceivedBytes; private TextView txtWaterLitres; private TextView txtSensor1; private TextView txtSensor2; private TextView txtSensor3; private EditText etCallibrationValue; private Button btnSetCallibrationValue; private static final String ACTION_USB_PERMISSION = "com.google.android.DemoKit.action.USB_PERMISSION"; private UsbManager mUsbManager; private PendingIntent mPermissionIntent; private boolean mPermissionRequestPending; private UsbAccessory mAccessory; private ParcelFileDescriptor mFileDescriptor; private FileInputStream mInputStream; private FileOutputStream mOutputStream; int countWaterVol = 0; private int intCallibrationValue = 270; private static final int MESSAGE_TEMPERATURE = 1; private static final int MESSAGE_HUMIDITY = 2; private static final int MESSAGE_WATERLEVEL = 3; private static final byte COMMAND_OPEN_DOOR = 0x01; private static final byte COMMAND_CLOSE_DOOR = 0x02; protected class TelemetryPacket { private int value; public TelemetryPacket(int value) { this.value = value; } public int getValue() { return value; } } private int composeInt(byte hi, byte lo) { int val = (int) hi &amp; 0xff; val *= 256; val += (int) lo &amp; 0xff; return val; } /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); txtReceivedBytes=(TextView)findViewById(R.id.txtReceivedBytes); txtWaterLitres =(TextView)findViewById(R.id.txtWaterLitres); txtSensor1 = (TextView) findViewById(R.id.txtSensor1); txtSensor2 =(TextView)findViewById(R.id.txtSensor2); txtSensor3 =(TextView)findViewById(R.id.txtSensor3); etCallibrationValue = (EditText)findViewById(R.id.etCallibrationValue); btnSetCallibrationValue = (Button)findViewById(R.id.btnSetCallibrationValue); setupAccessory(); btnSetCallibrationValue.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { intCallibrationValue = Integer.parseInt(etCallibrationValue.getText().toString()); Toast.makeText(getApplicationContext(), "Callibration Value:" + intCallibrationValue, Toast.LENGTH_SHORT).show(); } }); } @Override public Object onRetainNonConfigurationInstance() { if (mAccessory != null) { return mAccessory; } else { return super.onRetainNonConfigurationInstance(); } } @Override public void onResume() { super.onResume(); if (mInputStream != null &amp;&amp; mOutputStream != null) { // streams were not null"); return; } // streams were null"); UsbAccessory[] accessories = mUsbManager.getAccessoryList(); UsbAccessory accessory = (accessories == null ? null : accessories[0]); if (accessory != null) { if (mUsbManager.hasPermission(accessory)) { openAccessory(accessory); } else { synchronized (mUsbReceiver) { if (!mPermissionRequestPending) { mUsbManager.requestPermission( accessory, mPermissionIntent); mPermissionRequestPending = true; } } } } else { // null accessory } } @Override public void onPause() { super.onPause(); } @Override public void onDestroy() { unregisterReceiver(mUsbReceiver); super.onDestroy(); } Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { //TelemetryPacket p = (TelemetryPacket) msg.obj; ValueMsg t = (ValueMsg) msg.obj; txtReceivedBytes.setText("Received Bytes: "+t.getRet()); if (t.getReading4()==1) { countWaterVol = countWaterVol+1; txtWaterLitres.setText("Water Produced in Litres:"+ (countWaterVol+"\n"+"Interrupt Signal"+t.getReading3()); } else { } txtSensor1.setText("S 1: "+t.getReading1()+","+ "Reading 2: "+t.getReading2()); txtSensor2.setText("S 3: "+t.getReading3()+","+ "Reading 4: "+t.getReading4()); txtSensor3.setText("S 5: "+t.getReading5()+","+ "Reading 6: "+t.getReading6()); Alets alerts = new Alets(); } }; private void setupAccessory() { mUsbManager = UsbManager.getInstance(this); mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent( ACTION_USB_PERMISSION), 0); IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION); filter.addAction(UsbManager.ACTION_USB_ACCESSORY_DETACHED); registerReceiver(mUsbReceiver, filter); if (getLastNonConfigurationInstance() != null) { mAccessory = (UsbAccessory) getLastNonConfigurationInstance(); openAccessory(mAccessory); } } private void openAccessory(UsbAccessory accessory) { mFileDescriptor = mUsbManager.openAccessory(accessory); if (mFileDescriptor != null) { mAccessory = accessory; FileDescriptor fd = mFileDescriptor.getFileDescriptor(); mInputStream = new FileInputStream(fd); mOutputStream = new FileOutputStream(fd); Thread thread = new Thread(null, this, "OpenAccessoryTest"); thread.start(); // Accessory opened } else { // failed to open accessory } } private void closeAccessory() { try { if (mFileDescriptor != null) { mFileDescriptor.close(); } } catch (IOException e) { } finally { mFileDescriptor = null; mAccessory = null; } } public void run() { int ret = 0; //byte[] buffer = new byte[16384]; byte[] buffer = new byte[65536]; int i; while (true) { // read data try { ret = mInputStream.read(buffer); //ret= ret/3; } catch (IOException e) { break; } i = 0; while (i &lt; ret) { int len = ret - i; // if (len &gt;= 1) { int value = (int) buffer[0]; Message m = Message.obtain(mHandler); m.obj = new ValueMsg('f',value,ret,buffer[1],buffer[2], buffer[3],buffer[4],buffer[5]); mHandler.sendMessage(m); i += 1; } } } public static final long unsignedIntToLong(byte[] b) { long l = 0; l |= b[0] &amp; 0xFF; l &lt;&lt;= 8; l |= b[1] &amp; 0xFF; l &lt;&lt;= 8; l |= b[2] &amp; 0xFF; l &lt;&lt;= 8; l |= b[3] &amp; 0xFF; return l; } public static int unsignedByteToInt(byte b) { return (int) b &amp; 0x10; } private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (ACTION_USB_PERMISSION.equals(action)) { synchronized (this) { UsbAccessory accessory = UsbManager.getAccessory(intent); if (intent.getBooleanExtra( UsbManager.EXTRA_PERMISSION_GRANTED, false)) { openAccessory(accessory); } else { // USB permission denied } } } else if (UsbManager.ACTION_USB_ACCESSORY_DETACHED.equals(action)) { UsbAccessory accessory = UsbManager.getAccessory(intent); if (accessory != null &amp;&amp; accessory.equals(mAccessory)) { // accessory detached closeAccessory(); } } } }; } </code></pre> <p>And here's the Arduino code (sketch):</p> <pre><code>#include &lt;Usb.h&gt; #include &lt;adk.h&gt; uint8_t b; USB Usb; ADK adk(&amp;Usb, "Ashok Kateshiya", // Manufacturer Name "analog TEST", // Model Name "TDS test ", // Description (user-visible string) "0.1", // Version "http://www.ashokkateshiya.co.cc", "123456789"); // Serial Number (optional) #define tds_pin A15 #define flow_pin 22 #define LLS_pin 49 float avg[10]; float value = 0; int count; int pin_state = 0, pin_old_state = 0; int pulse_counter = 0; int LLS_state; int LLS_flag = 0; int sensor_flag = 0; int timer_flag = 0; uint8_t msg[7] = { 0x00 }; uint16_t len = sizeof(msg); uint8_t rcode; void setup() { Serial.begin(115200); Serial.print("\r\nADK demo start"); if (Usb.Init() == -1) { Serial.print("\r\nOSCOKIRQ failed to assert"); while(1); // halt } pinMode(tds_pin, INPUT); pinMode(flow_pin, INPUT); pinMode(LLS_pin, INPUT); digitalWrite(LLS_pin, HIGH); digitalWrite(flow_pin, HIGH); TIMSK1 = 0x01; TCCR1A = 0x00; TCNT1 = 0x85EF; TCCR1B = 0x05; } void loop() { Usb.Task(); if (adk.isReady() == false) { return; } TDS(); flow(); LLS(); } void TDS() { for (count = 0; count &lt; 10; count++) { avg[count] = analogRead(tds_pin); } for (count = 0; count &lt; 10; count ++) { if (count == 0) { value = avg[count]; } else { value = value + avg[count]; } } if (len &gt; 0) { msg[0] = 0x1; msg[1] = value/10; rcode = adk.SndData (6, msg ); Serial.print("TDS 0 : "); Serial.println(msg[0]); Serial.print("TDS 1 : "); Serial.println(msg[1]); delay(10); } if (rcode &amp;&amp; rcode != hrNAK) USBTRACE2("DATA rcv :", rcode); } void flow() { pin_state = digitalRead(flow_pin); if (pin_state == LOW) { pin_old_state = pin_state; } if ((pin_state == HIGH) &amp;&amp; (pin_old_state == LOW)) { pin_old_state = pin_state; pulse_counter = (pulse_counter + 1); sensor_flag = 1; } if ((pulse_counter / 25 == 1) &amp;&amp; (sensor_flag == 1)) { pulse_counter = 0; sensor_flag = 0; msg[2] = 0x2; msg[3] = 1; rcode = adk.SndData (6, msg ); Serial.print("value :"); Serial.println(msg[3]); if (rcode &amp;&amp; rcode != hrNAK) { USBTRACE2 ("USB DATA : ", rcode); } } else { msg[2] = 0x2; msg[3] = 0; rcode = adk.SndData (6, msg ); Serial.print("value :"); Serial.println(msg[3]); if (rcode &amp;&amp; rcode != hrNAK) { USBTRACE2 ("USB DATA : ", rcode); } } delay(10); } void LLS() { LLS_state = digitalRead(LLS_pin); if (LLS_state != 0) { if (len &gt; 0) { msg[4] = 0x3; msg[5] = 0x0; rcode = adk.SndData (6, msg ); Serial.print("LLS 4 : "); Serial.println(msg[4]); Serial.print("LLS 5 : "); Serial.println(msg[5]); } } else { msg[4] = 0x3; msg[5] = 0x1; rcode = adk.SndData (6, msg ); Serial.print("LLS 0 : "); Serial.println(msg[4]); Serial.print("LLS 2 : "); Serial.println(msg[5]); } if (rcode &amp;&amp; rcode != hrNAK) USBTRACE2("DATA rcv :", rcode); delay(10); } /****** timer overflow *******/ ISR(TIMER1_OVF_vect) { TCNT1 = 0x85EF; if (pin_state == pin_old_state ) { timer_flag = 1; } } </code></pre>
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    1. USMatthew Murdoch
    1. USashokk
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      1. POUnable to receive values more than 255 on Android device from Arduino
      1. This table or related slice is empty.
      1. VTDownMod
    2. VO
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      1. POUnable to receive values more than 255 on Android device from Arduino
      1. This table or related slice is empty.
      1. VTUpMod
    1. COGive us arduino code
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      1. POUnable to receive values more than 255 on Android device from Arduino
      1. USMrD
    2. COPlease, paste your android code where you think error might be!
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      1. POUnable to receive values more than 255 on Android device from Arduino
      1. USMrD
    3. COHow did you connect your devices ?
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      1. POUnable to receive values more than 255 on Android device from Arduino
      1. USMrD
 

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