ESP32 KeyPad

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ชลิตา จูมสีมา : เขียน

Library: https://github.com/Chris--A/Keypad

ตัวอย่างโค้ด: 

#include <Keypad.h>

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] = {13, 12, 14, 27}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {26, 25, 33, 32}; //connect to the column pinouts of the keypad

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

void setup(){
  Serial.begin(115200);
}
  
void loop(){
  char key = keypad.getKey();
  if (key){
    Serial.print(key);
  }
}

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