Arduino Error 'keypadEvent' was not declared in this scope

[dann11]

Hi! I am trying to use the keypad.addEventListener() to call an event I did use it with keypadEvent,and then compiling my code gives me an Error 'keypadEvent' was not declared in this scope. Can you please help me where might have I gone wrong.

#include <Keypad.h>

//pin assignments
int latchPin = 15;                    
int clockPin = 14;                    
int dataPin = 16;                     
int keySwitch = 9;                   
int ledActual = 17;                   
int ledTarget = 18;                  
int ledTactTime = 19;                



//global variables
byte digitBuffer[6] = {0};

int digitScan = 1;

byte valueKeypad = 0;

byte num = 0;

//keypad
const byte ROWS = 4; //four rows
const byte COLS = 4; //three columns
char keys[ROWS][COLS] = {
  {'1','2','3','A'},
  {'4','5','6','B'},
  {'7','8','9','C'},
  {'#','0','*','D'},
};
byte rowPins[ROWS] = {0 , 1, 2, 3}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {4, 5, 6, 7};//nnect to the column pinouts of the keypad

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS );



//display 0,1,2,3,4,5,6,7,8,9:
byte datArray[10] = {B01111101, B00100001, B01010111, B01110011, B00101011, B01111010, B01111110, B01100001, B01111111, B01111011};

void setup()
{
 //Serial.begin(9600);

  //pin designation
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);

  pinMode(keySwitch, INPUT);
  pinMode(ledActual, OUTPUT);
  pinMode(ledTarget, OUTPUT);
  pinMode(ledTactTime, OUTPUT);



  //initialize display
  digitalWrite(latchPin, LOW);
  shiftOut(dataPin,clockPin, MSBFIRST, datArray[0]);
  shiftOut(dataPin,clockPin, MSBFIRST, datArray[0]);
  shiftOut(dataPin,clockPin, MSBFIRST, datArray[0]);
  shiftOut(dataPin,clockPin, MSBFIRST, datArray[0]);
  digitalWrite(latchPin, HIGH); //pull the latchPin to save the data

  keypad.addEventListener(keypadEvent);
 }

void keypadEvent(KeypadEvent key)
{
  if (keySwitch == LOW)
  {
  switch(keypad.getState())
  {
    case PRESSED:
        switch(key);
          {
              case 'A':
                   digitalWrite(ledActual, HIGH);
                   //transmit data to the display - Actual Value
              break;

              case '3':
                   digitalWrite(ledTarget, HIGH);
                   //transmit data to the display - Target Value
              break;

              case '2':
                   digitalWrite(ledTactTime, HIGH);
                   //transmit data to the display - Time Value
              break;

              case '1';
                    digitalWrite(ledActual, LOW);
                    digitalWrite(ledTarget, LOW);
                    digitalWrite(ledTactTime, LOW);
                   //save the Actual Value to the Actual Variable
              break;
          }
    break;

    case RELEASED:
        switch(key);
          {
              case 'A':
                   digitalWrite(ledActual, HIGH);
                   keypadAction();
                   //transmit data to the display - Actual Value
              break;

              case '3':
                   digitalWrite(ledTarget, HIGH);
                   keypadAction();
                   //transmit data to the display - Target Value
              break;

              case '2':
                   digitalWrite(ledTactTime, HIGH);
                   keypadAction();
                   //transmit data to the display - Time Value
              break;

              case '1';
                   digitalWrite(ledActual, LOW);
                   digitalWrite(ledTarget, LOW);
                   digitalWrite(ledTactTime, LOW);
                   //save the Actual Value to the Actual Variable
              break;
          }
    break;

    case HOLD:
        switch(key);
          {
              case 'A':
                   digitalWrite(ledActual, HIGH);
                   //transmit data to the display - Actual Value
              break;

              case '3':
                   digitalWrite(ledTarget, HIGH);
                   //transmit data to the display - Target Value
              break;

              case '2':
                   digitalWrite(ledTactTime, HIGH);
                   
              break;

              case '1';
                   digitalWrite(ledActual, LOW);
                   digitalWrite(ledTarget, LOW);
                   digitalWrite(ledTactTime, LOW);
                   
              break;
          }
    break;
  }
  }
}

 

[srizbf]

add
void loop()
{
//the keypad case statements here...
}
to your code module.

 

[dann11]

add
void loop()
{
//the keypad case statements here...
}
to your code module.

I just did, but I have found the same error..

 

[srizbf]

What happens when you write

keypad.addEventListener(keypadEvent);

as
within the void loop()
{
keypad.addEventListener(keypadEvent);
........
}

and remove it from setup()

 

[dann11]

I have made it worked. It just re-arranged each function. Thanks for the help anyway.

 

[dann11]

Arduino "no_Key" can it be used in multiple function

Hi! I am trying to used the "no_key" of arduino keypad with multiple function, as the first function is called, it works perfectly, but when the next function(also uses the "no_key") is called keypad is no longer responding. Can the "no_key" be used in multiple function?

first function:

void keypadPress()
{
  
  char key = keypad.getKey();

  if(keypadActionFlag == true)
   {
      if(key != NO_KEY)
         {

            if (key == 'A')
              {
                  
                  digitalWrite(ledActual, HIGH);
                  digitalWrite(ledTarget, LOW);
                  digitalWrite(ledTactTime, LOW);
        
                  keypadActualFlag = true;
        
                  //transmit data to the display - Actual Value
              }

           else if (key == '3')
              {
                
                digitalWrite(ledTarget, HIGH);
                digitalWrite(ledActual, LOW);
                digitalWrite(ledTactTime, LOW);
        
                keypadTargetFlag = true;
       
                //transmit data to the display - Target Value
              }

          else if (key == '2')
              {
 
                digitalWrite(ledTactTime, HIGH);
                digitalWrite(ledActual, LOW);
                digitalWrite(ledTarget, LOW);
                
                keypadTactTimeFlag = true;
        
                //transmit data to the display - Time Value
              }
   
         else if (key == '1')
              {
                digitalWrite(ledActual, LOW);
                digitalWrite(ledTarget, LOW);
                digitalWrite(ledTactTime, LOW);
                
                keypadActualFlag = false;
                keypadTargetFlag = false;
                keypadTactTimeFlag = false;
                
                //save the Actual Value to the Actual Variable    
              }

          else
              {
                  //do nothing
              }
  
    }
   }

   else
   {
    //do nothing
   }
}

2nd function:

void keypadAction()
{
if ((keypadActualFlag == true) || (keypadTargetFlag == true) || (keypadTactTimeFlag == true))
{
  
  char keyPad = keypad.getKey();
  
  //keypad printing of value
  if (keyPad != NO_KEY)
  {
   
       if (keyPad == 'D')
          {
              //delay(300);
              num = datArray[1];
              // Serial.println(num);
              digitalWrite(latchPin, LOW); 
              Serial.println(num);
              Serial.println("Keypress");
          }
        
        
        else if (keyPad == 'C')
          {
              // delay(300);
              num = datArray[2];
              digitalWrite(latchPin, LOW);
              Serial.println(num);
          }
        
    
        else if (keyPad == 'B')
          {
              //  delay(300);
              num = datArray[3];
              digitalWrite(latchPin, LOW);
              Serial.println(num);
          }
        
    
        else if (keyPad == '*')
          {
              num = datArray[4];
              Serial.println(num);
              digitalWrite(latchPin, LOW);
              // delay(300);
          }
        
    
        else if (keyPad == '9')
          {
               //delay(300);
               num = datArray[5];
               Serial.println(num);
               digitalWrite(latchPin, LOW);
          }
         
     
         else if (keyPad == '6')
          {
              // delay(300);
              //  delay(200);
              num = datArray[6];
              Serial.println(num);
              digitalWrite(latchPin, LOW);
          }
         

         else if (keyPad == '0')
          {
              num = datArray[7];
              Serial.println(num);
              digitalWrite(latchPin, LOW);
          }
         
    
         else if (keyPad == '8')
          {
              num = datArray[8];
              Serial.println(num); 
              digitalWrite(latchPin, LOW); 
          }
         
    
         else if (keyPad == '5')
          {
              num = datArray[9];
              digitalWrite(latchPin, LOW);
              Serial.println(num);
          }
         
         
        else if (keyPad == '7')
          {
              // delay(300);
              num = datArray[0];
              digitalWrite(latchPin, LOW);
              Serial.println(num);
          }
         

         else if (keyPad == '4')
          {
              digitScan = 0;
    
              digitalWrite(latchPin, LOW);
              shiftOut(dataPin,clockPin, MSBFIRST, datArray[0]);
              digitalWrite(latchPin, HIGH); //pull the latchPin to save the data
              //delay(250); //wait for a second
         }
        
  
        else if (keyPad == '#')
          {
              digitScan = 0;
    
              digitalWrite(latchPin, LOW);
              shiftOut(dataPin,clockPin, MSBFIRST, datArray[0]);
              digitalWrite(latchPin, HIGH); //pull the latchPin to save the data
              //delay(250); //wait for a second
          }

         else
         {
          //do nothing
         }

       
  

    digitBuffer = num;
  
    displayValue();

  
  }

 /* else
  {
    Serial.println("keypadPress else");
  }*/
}

else
{
  // do nothing
}
}