Lampu Lalu Lintas ESP32

1// ─────────────────────────────────────────
2//   BlueGrays · bluegrays.com
3//   Lampu Lalu Lintas ESP32
4// ─────────────────────────────────────────
5// Siklus lampu lalu lintas dengan LED merah, kuning dan hijau: merah 3 s,
6// merah + kuning 0.8 s, hijau 3 s, kuning 0.8 s.
7//
8// Pin:
9//   GPIO 5  -> LED merah
10//   GPIO 18 -> LED kuning
11//   GPIO 19 -> LED hijau
12//   Setiap LED dengan resistor 220 ohm, katode ke GND
13
14const int RED = 5;      // Pin LED merah
15const int YELLOW = 18;  // Pin LED kuning
16const int GREEN = 19;   // Pin LED hijau
17
18void setup() {
19  pinMode(RED, OUTPUT);
20  pinMode(YELLOW, OUTPUT);
21  pinMode(GREEN, OUTPUT);
22}
23
24void loop() {
25  // Merah
26  digitalWrite(RED, HIGH);
27  digitalWrite(YELLOW, LOW);
28  digitalWrite(GREEN, LOW);
29  delay(3000);
30
31  // Merah + kuning
32  digitalWrite(YELLOW, HIGH);
33  delay(800);
34
35  // Hijau
36  digitalWrite(RED, LOW);
37  digitalWrite(YELLOW, LOW);
38  digitalWrite(GREEN, HIGH);
39  delay(3000);
40
41  // Kuning
42  digitalWrite(GREEN, LOW);
43  digitalWrite(YELLOW, HIGH);
44  delay(800);
45  digitalWrite(YELLOW, LOW);
46}
47