How to put reset, stop, enter key on 4x4 keypad

Using Arduino Programming Questions
1

I have a 4x4 keypad with corresponding command for every key. In my program, I have a buzzer sound put on 'A'. What I aim is to press 'A' and then press an enter button for the buzzer to make a sound and then press stop if I don't want it to make a sound and press the reset button to press a new key to make other commands again. The problem now is how to code Enter, Reset, and stop buttons.

#include <Keypad.h>
#include <Stepper.h>
#include <Servo.h>
const byte ROWS = 4; 
const byte COLS = 4; 
Servo myservo;
int pos = 0;
const int buzzer = A0;
const int stepsPerRevolution = 200;
char hexaKeys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte rowPins[ROWS] = {9, 8, 7, 6}; 
byte colPins[COLS] = {5, 4, 3, 2}; 

Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 
Stepper myStepper(stepsPerRevolution, 9,10,11,12);
void setup(){
  Serial.begin(9600);
  
  pinMode(buzzer, OUTPUT);
  myservo.attach(A1);
  myStepper.setSpeed(120);
}
  
void loop(){
  char customKey = customKeypad.getKey();
  
  if (customKey == 'A'){
  tone(buzzer, 1000); 
  delay(1000);        
  noTone(buzzer);     
  delay(1000);        
  Serial.println(customKey);
  }
    if (customKey == 'B'){
        // step one revolution  in one direction:
  Serial.println("clockwise");
  myStepper.step(stepsPerRevolution);
  delay(500);

  // step one revolution in the other direction:
 Serial.println("counterclockwise");
  myStepper.step(-stepsPerRevolution);
  delay(500);
 
  Serial.println(customKey);
  }
    if (customKey == 'C'){
      for (pos = 0; pos <= 180; pos += 1) { 
    // in steps of 1 degree
    myservo.write(pos);              
    delay(15);                       
  }
  for (pos = 180; pos >= 0; pos -= 1) { 
    myservo.write(pos);              
    delay(15);                       
  }
  
  Serial.println(customKey);
  }
  if (customKey == '1'){
  Serial.println(customKey);
  }

}
2

Looks like pin 9 is being used for both the keypad and stepper :thinking: .

3

Hi! is there a way to stop the loop with another button? I'm using a keypad and i aim to have a 'stop' button whenever i press the 'A' button to execute the piezo buzzer sound.

#include <Keypad.h>
const byte ROWS = 4; 
const byte COLS = 4; 

const int buzzer = A0;

char hexaKeys[ROWS][COLS] = {
  {'1', '2', '3', 'A'},
  {'4', '5', '6', 'B'},
  {'7', '8', '9', 'C'},
  {'*', '0', '#', 'D'}
};

byte rowPins[ROWS] = {9, 8, 7, 6}; 
byte colPins[COLS] = {5, 4, 3, 2}; 

Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); 

void setup(){
  Serial.begin(9600);
  
}
  
void loop(){
  char customKey = customKeypad.getKey();
  
  while(customKey == 'A'){  
  tone(buzzer, 1000); 
  delay(1000);        
  noTone(buzzer);     
  delay(1000);   
  Serial.println(customKey);
 
  }
4

Your two topics on the same or similar subject have been merged.

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1 Like
5

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