title: Arduino stops accepting commands from PS3 controller?? although it remains connected
body: <p>so I was trying to control a bot wirelessly with the help of ps3 controller and USB host shield, i am using Arduino UNO as micro-controller. I was able to connect PS3 controller with Arduino and checked all button presses. It works very smoothly for button presses and shows on serial monitor which button was pressed without any lag. But the issue I am facing is that when I try to call any function on button press, the entire function is getting executed and execution comes back to void loop but Arduino stops accepting commands from ps3. But it shows that PS3 is still connected and the connection isn't lost. I went through different blogs and I found out that some say that issue is with new HOST SHIELD library 2.0 and some say that UNO computation takes time.
  this is what I have tried.</p>
  <pre><code>#define motopinl1 8
  #define motopinr1 9
  # define motopine1 10
  
  #define motopinl2 11
  #define motopinr2 12
  #define motopine2 13
  
  #define val 200
  
  
  void setup() {
    Serial.begin(115200);
  #if !defined(__MIPSEL__)
    while (!Serial); // Wait for serial port to connect - used on Leonardo, Teensy and other boards with built-in USB CDC serial connection
  #endif
    if (Usb.Init() == -1) {
      Serial.print(F(&quot;\r\nOSC did not start&quot;));
      while (1); //halt
    }
    Serial.print(F(&quot;\r\nPS3 Bluetooth Library Started&quot;));
  }
  
  void moveforward()
  {
    
   // digitalWrite(motopinl1,LOW);
    digitalWrite(motopinr1,LOW);
    digitalWrite(motopinl2,LOW);
   // digitalWrite(motopinr2,LOW);
    analogWrite(motopine1,200);
    analogWrite(motopine2,200);
   // digitalWrite(motopinl1,HIGH);
    //digitalWrite(motopinr2,HIGH);
  
    Serial.println(&quot;MoveForward called&quot;);
    Usb.Task();
  
  }
  
  void moveBackward()
  {
    
    digitalWrite(motopinl1,LOW);
  //  digitalWrite(motopinr1,LOW);
   // digitalWrite(motopinl2,LOW);
    digitalWrite(motopinr2,LOW);
    analogWrite(motopine1,200);
    analogWrite(motopine2,200);
   // digitalWrite(motopinr1,HIGH);
    //digitalWrite(motopinl2,HIGH);
  
    Serial.println(&quot;Movebackward called&quot;);
    Usb.Task();
  }
  
  void moveleft()
  {
    
    digitalWrite(motopinl1,LOW);
   // digitalWrite(motopinr1,LOW);
    digitalWrite(motopinl2,LOW);
   // digitalWrite(motopinr2,LOW);
    analogWrite(motopine1,200);
    analogWrite(motopine2,200);
   // digitalWrite(motopinr2,HIGH);
    //digitalWrite(motopinr1,HIGH);
  
  Usb.Task();
    Serial.println(&quot;Moveleft called&quot;);
  }
  
  void moveright()
  {
    
   // digitalWrite(motopinl1,LOW);
    //digitalWrite(motopinr1,LOW);
    digitalWrite(motopinl2,LOW);
    digitalWrite(motopinr2,LOW);
    analogWrite(motopine1,200);
    analogWrite(motopine2,200);
   // digitalWrite(motopinl1,HIGH);
    //digitalWrite(motopinl2,HIGH);
    
    Serial.println(&quot;Moveright called&quot;);
    Usb.Task();
  }
  
  void stopit()
  {
    digitalWrite(motopinl1,LOW);
    digitalWrite(motopinr1,LOW);
    digitalWrite(motopinl2,LOW);
    digitalWrite(motopinr2,LOW);
    analogWrite(motopine1,0);
    analogWrite(motopine2,0);
    Usb.Task();
  }
  
  void loop() {
    Usb.Task();
  
    if (PS3.PS3Connected || PS3.PS3NavigationConnected) {
      if (PS3.getAnalogHat(LeftHatX) &gt; 137 || PS3.getAnalogHat(LeftHatX) &lt; 117 || PS3.getAnalogHat(LeftHatY) &gt; 137 || PS3.getAnalogHat(LeftHatY) &lt; 117 || PS3.getAnalogHat(RightHatX) &gt; 137 || PS3.getAnalogHat(RightHatX) &lt; 117 || PS3.getAnalogHat(RightHatY) &gt; 137 || PS3.getAnalogHat(RightHatY) &lt; 117) {
       // Serial.print(F(&quot;\r\nLeftHatX: &quot;));
        //Serial.print(PS3.getAnalogHat(LeftHatX));
        //Serial.print(F(&quot;\tLeftHatY: &quot;));
        //Serial.print(PS3.getAnalogHat(LeftHatY));
        if (PS3.PS3Connected) { // The Navigation controller only have one joystick
          //Serial.print(F(&quot;\tRightHatX: &quot;));
          //Serial.print(PS3.getAnalogHat(RightHatX));
          //Serial.print(F(&quot;\tRightHatY: &quot;));
          //Serial.print(PS3.getAnalogHat(RightHatY));
        }
      }
  
      // Analog button values can be read from almost all buttons
      if (PS3.getAnalogButton(L2) || PS3.getAnalogButton(R2)) {
        Serial.print(F(&quot;\r\nL2: &quot;));
        Serial.print(PS3.getAnalogButton(L2));
        if (PS3.PS3Connected) {
          Serial.print(F(&quot;\tR2: &quot;));
          Serial.print(PS3.getAnalogButton(R2));
        }
      }
  
      if (PS3.getButtonClick(PS)) {
        Serial.print(F(&quot;\r\nPS&quot;));
        PS3.disconnect();
      }
      else {
        if (PS3.getButtonClick(TRIANGLE)) {
          Serial.print(F(&quot;\r\nTriangle&quot;));
          moveforward();
          PS3.setRumbleOn(RumbleLow);
        }
        if (PS3.getButtonClick(CIRCLE)) {
          Serial.print(F(&quot;\r\nCircle&quot;));
          PS3.setRumbleOn(RumbleHigh);
          moveright();
        }
        if (PS3.getButtonClick(CROSS))
        {
            Serial.print(F(&quot;\r\nCross&quot;));
            moveBackward();
        }
        if (PS3.getButtonClick(SQUARE))
        {
          Serial.print(F(&quot;\r\nSquare&quot;));
          moveleft();
        }
  
        if (PS3.getButtonClick(UP)) {
          Serial.print(F(&quot;\r\nUp&quot;));
          stopit();
          if (PS3.PS3Connected) {
            PS3.setLedOff();
            PS3.setLedOn(LED4);
          }
        }
        if (PS3.getButtonClick(RIGHT)) {
          Serial.print(F(&quot;\r\nRight&quot;));
          if (PS3.PS3Connected) {
            PS3.setLedOff();
            PS3.setLedOn(LED1);
          }
        }
        if (PS3.getButtonClick(DOWN)) {
          Serial.print(F(&quot;\r\nDown&quot;));
          if (PS3.PS3Connected) {
            PS3.setLedOff();
            PS3.setLedOn(LED2);
          }
        }
        if (PS3.getButtonClick(LEFT)) {
          Serial.print(F(&quot;\r\nLeft&quot;));
          if (PS3.PS3Connected) {
            PS3.setLedOff();
            PS3.setLedOn(LED3);
          }
        }
  
        if (PS3.getButtonClick(L1))
          Serial.print(F(&quot;\r\nL1&quot;));
        if (PS3.getButtonClick(L3))
          Serial.print(F(&quot;\r\nL3&quot;));
        if (PS3.getButtonClick(R1))
          Serial.print(F(&quot;\r\nR1&quot;));
        if (PS3.getButtonClick(R3))
          Serial.print(F(&quot;\r\nR3&quot;));
  
        if (PS3.getButtonClick(SELECT)) {
          Serial.print(F(&quot;\r\nSelect - &quot;));
          PS3.printStatusString();
        }
        if (PS3.getButtonClick(START)) {
          Serial.print(F(&quot;\r\nStart&quot;));
          printAngle = !printAngle;
        }
      }
  #if 0 // Set this to 1 in order to see the angle of the controller
      if (printAngle) {
        Serial.print(F(&quot;\r\nPitch: &quot;));
        Serial.print(PS3.getAngle(Pitch));
        Serial.print(F(&quot;\tRoll: &quot;));
        Serial.print(PS3.getAngle(Roll));
      }
  #endif
    }
  #if 0 // Set this to 1 in order to enable support for the Playstation Move controller
    else if (PS3.PS3MoveConnected) {
      if (PS3.getAnalogButton(T)) {
        Serial.print(F(&quot;\r\nT: &quot;));
        Serial.print(PS3.getAnalogButton(T));
      }
      if (PS3.getButtonClick(PS)) {
        Serial.print(F(&quot;\r\nPS&quot;));
        PS3.disconnect();
      }
      else {
        if (PS3.getButtonClick(SELECT)) {
          Serial.print(F(&quot;\r\nSelect&quot;));
          printTemperature = !printTemperature;
        }
        if (PS3.getButtonClick(START)) {
          Serial.print(F(&quot;\r\nStart&quot;));
          printAngle = !printAngle;
        }
        if (PS3.getButtonClick(TRIANGLE)) {
          Serial.print(F(&quot;\r\nTriangle&quot;));
          PS3.moveSetBulb(Red);
        }
        if (PS3.getButtonClick(CIRCLE)) {
          Serial.print(F(&quot;\r\nCircle&quot;));
          PS3.moveSetBulb(Green);
        }
        if (PS3.getButtonClick(SQUARE)) {
          Serial.print(F(&quot;\r\nSquare&quot;));
          PS3.moveSetBulb(Blue);
        }
        if (PS3.getButtonClick(CROSS)) {
          Serial.print(F(&quot;\r\nCross&quot;));
          PS3.moveSetBulb(Yellow);
        }
        if (PS3.getButtonClick(MOVE)) {
          PS3.moveSetBulb(Off);
          Serial.print(F(&quot;\r\nMove&quot;));
          Serial.print(F(&quot; - &quot;));
          PS3.printStatusString();
        }
      }
      if (printAngle) {
        Serial.print(F(&quot;\r\nPitch: &quot;));
        Serial.print(PS3.getAngle(Pitch));
        Serial.print(F(&quot;\tRoll: &quot;));
        Serial.print(PS3.getAngle(Roll));
      }
      else if (printTemperature) {
        Serial.print(F(&quot;\r\nTemperature: &quot;));
        Serial.print(PS3.getTemperature());
      }
    }
  #endif
  }
  </code></pre>
  <p>initial libraries have been added. Can anyone please suggest what could be the probable issue. also why it shows still connected but doesn't accept command.</p>