#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>

#define TFT_DC 2
#define TFT_CS 15
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);

#include "Wire.h"
// #include "I2CKeyPad.h"
// #include "Keypad_I2C.h"
#include <Keypad.h>          // GDY120705
// #include <Wire.h>

#define I2CADDR 0x38

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] = {32, 35, 12, 14}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {27, 26, 25, 33}; //connect to the column pinouts of the keypad
	
// Keypad_I2C keypad = Keypad_I2C( makeKeymap(keys), rowPins, colPins, ROWS, COLS, I2CADDR );
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);
byte ledPin = 17; 

boolean blink = false;

#define deltaTime(val) (millis()-val)

void setup() {

  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  keypad.begin(makeKeymap(keys));
  pinMode(ledPin, OUTPUT);      // sets the digital pin as output
  digitalWrite(ledPin, HIGH);   // sets the LED on
  keypad.addEventListener(keypadEvent); //add an event listener for this keypad
  keypad.setHoldTime(1500);

  tft.begin();
  tft.setRotation(1);

  tft.setTextColor(ILI9341_GREEN);
  tft.setTextSize(2);
  tft.print("Connecting to WiFi");
}

void loop() {
  char key = keypad.getKey();
  
  if (key) {
    Serial.println(key);
  }
  if (blink){
    digitalWrite(ledPin,!digitalRead(ledPin));
    delay(100);
  }
}

//take care of some special events
void keypadEvent(KeypadEvent key){
  Serial.println("TEST, ESP32!");
  switch (keypad.getState()){
    case PRESSED:
      switch (key){
        case '#': digitalWrite(ledPin,!digitalRead(ledPin)); break;
        case '*': 
          digitalWrite(ledPin,!digitalRead(ledPin));
        break;
      }
    break;
    case RELEASED:
      switch (key){
        case '*': 
          digitalWrite(ledPin,!digitalRead(ledPin));
          blink = false;
        break;
      }
    break;
    case HOLD:
      switch (key){
        case '*': blink = true; break;
      }
    break;
  }
}