#include <Keypad.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

const byte ROWS = 4; 
const byte COLS = 4; 

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);
int dhttype = 22;
int dhtpin = A3;
LiquidCrystal_I2C lcd(0x27, 16, 2);
DHT dht(dhtpin, dhttype);
int pot = A0;
int LDR = A1;
int joy = A2;
char currentMode;


void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  dht.begin();
  lcd.setCursor(0, 0);
  lcd.print("press A,B,C or D");
}

void loop() {
  char keypad = customKeypad.getKey();
  int joyvalue = analogRead(joy);
  int potvalue = analogRead(pot);
  int LDRvalue = analogRead(LDR);
  int dhtvalue = dht.readTemperature();
  if(keypad){
    lcd.clear();
    currentMode = keypad;
    Serial.println(currentMode);  // для отладк
    Serial.println(keypad);
  }
  switch(currentMode){
    case 'A':
      potan();
      break;
    case 'B':
      joyst();
      break;
    
    case 'C':
      LDRva();
      break;
    
    case 'D':
      DHTva();
      break;
    }
  }
void potan(){
  lcd.setCursor(5, 0);
  lcd.print(analogRead(pot));
  lcd.print("   ");
}
void joyst(){
  lcd.setCursor(5, 0);
  lcd.print(analogRead(joy));
  lcd.print("   ");
}
void LDRva(){
  lcd.setCursor(5, 0);
  lcd.print(analogRead(LDR));
  lcd.print("   ");
}
void DHTva(){
  lcd.setCursor(5, 0);
  lcd.print(dht.readTemperature());
  lcd.print("   ");
}