Keyestudio ESP32 - Page 164

ESP32 Starter Kit
(continued from previous page)
int distance = 0; //Define a variable to receive the distance
int EchoPin = 14; //Connect Echo pin to IO14
int TrigPin = 13; //Connect Trig pin to IO13
int ligth_sensor = 33; //Define the photoresistor pin
int sound_sensor = 32; //efine the sound sensor pin
int pot_sensor = 25; //Define the potentiometer pin
void setup() {
//LCD 1602
lcd.init(); // initialize the lcd
lcd.backlight(); //Turn on the LCD backlight
lcd.setCursor(3, 0);
lcd.print("keyestudio"); //LCD displays "keyestudio"
//IR receiver
irrecv.enableIRIn(); // start receiving signals
//Ultrasonic
pinMode(TrigPin, OUTPUT); //Set Trig pin to output
pinMode(EchoPin, INPUT); //Set Echo pin to input
}
void loop() {
if (irrecv.decode(&results)) {
if (results.value != 0) { //Prevent the button from being pressed repeatedly
ir_rec = results.value; //The signal is assigned to the variable ir_rec
show_clear();
}
irrecv.resume(); //Release the IRremote and receive the next value.
}
switch (ir_rec) {
case 0xFF02FD: show_clear(); break;
case 0xFF6897: show_temperature(); break;
case 0xFF9867: show_humidity(); break;
case 0xFFB04F: show_distance(); break;
case 0xFF30CF: show_luminance(); break;
case 0xFF18E7: show_sound(); break;
case 0xFF7A85: show_pot(); break;
}
delay(300);
}
void show_clear() { //Clear display
lcd.setCursor(0, 1);
lcd.print(" ");
}
void show_temperature() { //Display temperature
if (xht.receive(dat)) { //Check correct return to true
lcd.setCursor(0, 1);
lcd.print("Temperature:");
lcd.setCursor(13, 1);
lcd.print(dat[2]);
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160 Chapter 8. Arduino Tutorial