esp8266–03 按钮次数计数

调试程序

按下容易出现抖动,也程序误以为按下开关,所以要避免Debounce

int buttonState = 0;         // 按钮状态
int beforeState = 0;        // 按下前的状态   
int counter = 0;            // 计数器

void setup() {

  Serial.begin(9600);       // 频率设置
 
  pinMode(LED_BUILTIN, OUTPUT);     // 设置点亮LED
 
  pinMode(16, INPUT);               // D0针脚为信号监测
}

void loop() {
  buttonState = digitalRead(16);        // 获取按钮状态

  if (buttonState == HIGH) {            // 判断是否按下
          digitalWrite(LED_BUILTIN,LOW );   //按下点亮
      } else {
          digitalWrite(LED_BUILTIN,HIGH );   // 否则关闭
            }
  
  //Serial.println(buttonState); 
  //Serial.println(beforeState); 
  //Serial.println("------------------------");         
  if(buttonState==HIGH and beforeState==LOW){
      ++counter;
      Serial.print("the press time is: ");
      Serial.print(counter);
      Serial.println();
      //Serial.println("++++++++++++++++++++++++++++++++++");
    }
  //Serial.println(buttonState);
  // 避免debounce
  if(buttonState!=beforeState){
    delay(50);
    }
  beforeState=buttonState;          // 将按钮当前状态传递回去
  delay(1);
}

精简程序

int buttonState = 0;         // 按钮状态
int beforeState = 0;        // 按下前的状态   
int counter = 0;            // 计数器

void setup() {
  Serial.begin(9600);       // 频率设置
  pinMode(16, INPUT);               // D0针脚为信号监测
}

void loop() {       
  if(buttonState==HIGH and beforeState==LOW){
      ++counter;
      Serial.print("the press time is: ");
      Serial.print(counter);
      Serial.println();
    }
  if(buttonState!=beforeState){
    delay(50);
    }
  beforeState=buttonState;          // 将按钮当前状态传递回去
  delay(1);
}