1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
#define RED_PIN 15
#define GREEN_PIN 2
#define BLUE_PIN 13

#define PWM_FREQ 5000
#define PWM_RES 8
#define RED_CH 0
#define GREEN_CH 1
#define BLUE_CH 2

void setup() {
Serial.begin(115200);

// 初始化 PWM 通道
ledcSetup(RED_CH, PWM_FREQ, PWM_RES);
ledcSetup(GREEN_CH, PWM_FREQ, PWM_RES);
ledcSetup(BLUE_CH, PWM_FREQ, PWM_RES);

// 綁定 GPIO 到 PWM 通道
ledcAttachPin(RED_PIN, RED_CH);
ledcAttachPin(GREEN_PIN, GREEN_CH);
ledcAttachPin(BLUE_PIN, BLUE_CH);
}

void loop() {
// 顏色變化循環(共陰模組:高亮度 → 0)
setColor(255, 0, 0); // 紅
delay(1000);

setColor(0, 255, 0); // 綠
delay(1000);

setColor(0, 0, 255); // 藍
delay(1000);

setColor(255, 255, 0); // 黃
delay(1000);

setColor(0, 255, 255); // 青
delay(1000);

setColor(255, 0, 255); // 紫
delay(1000);

setColor(255, 255, 255); // 白(全亮)
delay(1000);

setColor(0, 0, 0); // 關燈(黑)
delay(1000);
}

// 設定顏色亮度(0~255),共陰 LED:數值越大亮度越低
void setColor(uint8_t r, uint8_t g, uint8_t b) {
// 對共陰 RGB LED,需要將亮度反轉(0 為全亮,255 為關閉)
ledcWrite(RED_CH, 255 - r);
ledcWrite(GREEN_CH, 255 - g);
ledcWrite(BLUE_CH, 255 - b);
}