#include Arduino.h// 引脚与PWM配置#define LED_PIN 5 // D5引脚#define LEDC_CH 1 // PWM通道1#define PWM_FREQ 5000 // 提高频率消除频闪#define PWM_RES 8 // 8位分辨率 0~255#define BREATHE_DELAY 30 // 亮度步进延时数值越大呼吸越慢void init_PWM() {// 配置通道频率、分辨率ledcSetup(LEDC_CH, PWM_FREQ, PWM_RES);// 绑定引脚ledcAttachPin(LED_PIN, LEDC_CH);}void led_Breathing() {// 渐亮 0 → 255for(int i 0; i 255; i){ledcWrite(LEDC_CH, i);delay(BREATHE_DELAY);}// 渐暗 255 → 0改写为倒序循环逻辑更清晰for(int i 255; i 0; i--){ledcWrite(LEDC_CH, i);delay(BREATHE_DELAY);}}void setup() {init_PWM();}void loop() {led_Breathing();}
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