//configure pin2 as an input and enable the internal pull-up resistor pinMode(2, INPUT_PULLUP); pinMode(13, OUTPUT); } void loop() { //read the pushbutton value into a variable int sensorVal = digitalRead(2); //print out the value of the pushbutton Serial.println(sensorVal); //...
pinMode(Button1, INPUT);//按钮1引脚设置为输入 pinMode(Button2, INPUT_PULLUP); //按钮2引脚设置为输入上拉模式 } void loop() { // 读取输入引脚的值 boolean button1State = digitalRead(Button1); boolean button2State = digitalRead(Button2); // 打印结果到串口 Serial.print("button1:"); Ser...
Now that your setup has been completed, move into the main loop of your code. When your button is not pressed, the internal pull-up resistor connects to 5 volts. This causes the Arduino to report "1" or HIGH. When the button is pressed, the Arduino pin is pulled to ground, causing ...
int BUTTON = 8;//定义按钮在 12号引脚,连接一个下拉电阻 int val = 0;//变量val 存储按钮的状态 int old_val = 0;//暂存val变量的上一个时间状态 void setup(){ pinMode(BUTTON, INPUT_PULLUP);//INPUT —— 输入模式 OUTPUT —— 输出模式 INPUT_PULLUP —— 输入上拉模式 Serial.begin(9600);...
int Button2 = 3; //内置上拉电阻_按钮2_3号引脚 void setup() { Serial.begin(9600); //初始化串口波特率为9600 pinMode(Button1, INPUT);//按钮1引脚设置为输入 pinMode(Button2, INPUT_PULLUP); //按钮2引脚设置为输入上拉模式 } void loop() ...
#define BUTTON_PIN 4 voidsetup(){ Serial.begin(9600); pinMode(BUTTON_PIN, INPUT_PULLUP); } voidloop(){ Serial.println(digitalRead(BUTTON_PIN)); delay(10); } If you run this code and open the Serial Plotter, you’ll see that the default value is 1 (HIGH). When you press the b...
Arduino Logic Control (1): Push button switch to control LED lights.首先打开Arduino IDE，依次选择文件，示例，Digital,DigitallnputPullup。将此程序上传到Arduino开发板上，可以发现在之前的示例中也一直有一个上拉电阻，但是在本次演示中，上拉电阻是不存在的，因为本次演示是通过输入上拉模式。Start by ...
首先在int button =5这里是为了设定一个按钮的端口，这里我们将其设定为5，因此我们需要将线连接到...
//configure pin2 as an input and enable the internal pull-up resistor pinMode(2, INPUT_PULLUP); pinMode(13, OUTPUT); } void loop() { //read the pushbutton value into a variable int sensorVal = digitalRead(2); //print out the value of the pushbutton ...
这边通过`pinMode(buttonPin, INPUT_PULLUP)`打开内置的上拉电阻，使得2号数字口一直收到高电平，直到按下按键才会收到低电平。这边记录旧的按键状态的原因在于，一次按动根据按住时间不同出现n次触发，那么如果长按则会出现LED闪烁（一直切换LED开关），或者连续快速按动按键，也会出现LED灯开关不及时问题，因此需要...