使用按钮开关控制LED,按下开关时LED亮起,松开开关后LED关闭。
1、零知ESP32:http://www.lingzhilab.com/home/introduction.html?gid=184
2、按钮开关
3、220Ω电阻
4、LED
// set pin numbers
const int buttonPin = 4; // the number of the pushbutton pin
const int ledPin = 16; // the number of the LED pin
// variable for storing the pushbutton status
int buttonState = 0;
void setup() {
// initialize the pushbutton pin as an input
pinMode(buttonPin, INPUT);
// initialize the LED pin as an output
pinMode(ledPin, OUTPUT);
}
void loop() {
// read the state of the pushbutton value
buttonState = digitalRead(buttonPin);
// check if the pushbutton is pressed.
// if it is, the buttonState is HIGH
if (buttonState == HIGH) {
// turn LED on
digitalWrite(ledPin, HIGH);
} else {
// turn LED off
digitalWrite(ledPin, LOW);
}
}
导入程序代码,在右侧选择ESP32开发板,然后验证程序,如图: