buttonPin:连接按钮的引脚 2。 ledPin:连接 LED 的引脚 13。 buttonState:存储按钮的状态(HIGH 或 LOW)。 setup(): 设置为 OUTPUT 和 INPUT。ledPinbuttonPin loop(): 读取按钮的状态。 如果按下按钮 (HIGH),LED 亮起。 否则,LED 熄灭。 因此,在此代码中,按下引脚 2 上的按钮可切换引脚 13 上的 LED。
清楚了按键不同操作对PIN2引脚电平影响以后,我们就可以写代码了 constintbuttonPin =2; constintledPin =13; intbuttonState =0;/*variable for reading the pushbutton status*/ voidsetup(){ /* initialize the LED pin as an output:*/ pinMode(ledPin, OUTPUT); /* initialize the pushbutton pin as ...
In this Arduino tutorial I will show you how to turn an LED on and off with a push button. In fact, we’ll do 2 slightly different applications.First, we will power on the LED when the button is pressed, and power off the LED when the button is not pressed....
constint button_pin=7;// 声明按钮引脚为数字7constint led_pin=3;// 声明 LED 引脚为数字3byte lastButtonState=HIGH;// 定义一个字节类型的变量用于存储上一个按钮状态, 默认为HIGHbool ledState=LOW;// 声明并初始化一个布尔型变量用于存储 LED 的状态,默认为 LOW/**上拉电阻的作用: 当按钮未按下时...
使用网页上的按钮控制ESP32的LED亮灭,Arduino开发,软件环境:Arduino硬件环境:Lolin ESP32开发板我们开发板可能不完全相同,但是思路是相通的!, 视频播放量 17923、弹幕量 25、点赞数 249、投硬币枚数 152、收藏人数 548、转发人数 80, 视频作者 开环培训学校, 作者简介
Button 按钮 Turns on and off a light emitting diode(LED) connected to digital pin 13, when pressing a pushbutton attached to pin 2. 点亮和熄灭连接到数字针脚 13 上的 LED, 当按下连接到针脚 2 上的按钮开关。 The circuit: 电路连接
cv.itemconfigure(btn, image=green_button) def get_local_ip(): #获取当前计算机的IP地址 local_ip = "" try: socket_objs = [socket.socket(socket.AF_INET, socket.SOCK_DGRAM)] #print(socket_objs[0][1]) ip_from_ip_port = [(s.connect(("8.8.8.8", 53)), s.getsockname()[0], s.cl...
So, if you write a program for your controller that is made to blink an LED on or off, it will begin running that program when you power up the Arduino. The reset button stops the program that is currently running. To change the program saved on the Arduino, you’ll need to clear ...
buttonpressed = false; if(LEDSTATE == LOW) { LEDSTATE = HIGH; DigitalWrite(LED_GREEN,高); DigitalWrite(LED_RED,低); } else { ledState = low; DigitalWrite(LED_GREEN,低); DigitalWrite(LED_RED,高); } if(Radio.SendWithRetry(接收器,“ HI”,2))//目标节点ID,字符串或字节数组的消息,消...
LED.unsignedlongcurrentMillis=millis();if(currentMillis-previousMillis>=interval){// save the last time you blinked the LEDpreviousMillis=currentMillis;// if the LED is off turn it on and vice-versa:if(ledState==LOW){ledState=HIGH;}else{ledState=LOW;}// set the LED with the ledState...