#define _LED_H__//导入Arduino核心头文件#include"Arduino.h"classLED{private:byte pin;//控制led使用的引脚public:LED(byte p,bool state=LOW);//构造函数~LED();//析构函数bytegetPin();//获取控制的引脚voidon();//打开LEDvoidoff();//关闭LEDboolgetState();//获取LED状态voiddisattach();//释...
RST_PIN);// 创建新的RFID实例MFRC522::MIFARE_Key key;voidsetup(){Serial.begin(9600);// 设置串口波特率为9600while(!Serial);// 如果串口没有打开,则死循环下去不进行下面的操作SPI.begin();// SPI开始mfrc522.PCD_Init();// Init MFRC522 cardfor(byte i=0;i<6;i++){...
Therefore, to turn on pin 13, we need to write ‘HIGH’ to it as shown on line 4 using the ‘digitalWrite’ function. In the digital world, a binary value of 1 means HIGH or ON, and 0 means OFF or LOW. However, for Arduino we will stick with HIGH and LOW....
语法：DHT11.read(pin)参数：DHT11，一个 dht11 类的对象；pin，Arduino 连接传感器的引脚编号 返回值：int t 类型 ，为 0 0 、- -1 1 或 或 2 2 0 对应宏 DHTLIB_OK，收到数据，且校验正确；-1 对应宏 DHTLIB_ERROR_CHECKSUM，表示接收到数据但校验错误；2 .对应宏 DHTLIB_ERROR_TIMEOUT，表示通...
analogWrite(pin, value) Parameters 参数 pin: the pin to write to. pin:输出的引脚号 value: the duty cycle: between 0 (always off) and 255 (always on). value:占用空:从0(常关)到255(常开) Returns 返回值 nothing Notes and Known Issues 备注和已知问题 ...
On some Arduinos (Uno,...), pins MOSI, MISO and SCK are the same pins as digital pin 11, 12 and 13, respectively. That is why many tutorials instruct you to hook up the target to these pins. If you find this wiring more practical, have a define USE_OLD_STYLE_WIRING. This will...
pinMode(button, INPUT); // to print first value of count_presses which is 0 Serial.println(count_presses); } void loop() { // read the button input pin: int button_state = digitalRead(button); // check state of a button, check for digital ones when button is pressed, and count ...
digitalWrite(pin,LOW); }boolLED::getState() {returndigitalRead(pin); }voidLED::disattach()//引脚回收,恢复到上电状态{ digitalWrite(pin,LOW); pinMode(pin,INPUT); } /*** 实例化1个LED对象,用7号叫控制,让他闪烁10次,并在串口打印出它的状态。 10次完毕后释放回收引脚 ***/...
// put your setup code here, to run once: Serial.begin(9600); pinMode(ledPin, OUTPUT); // sets the digital pin as output pinMode(myledPin OUTPUT); // sets the digital pin as output pinMode(KEY1, INPUT_PULLUP); pinMode(KEY2, INPUT_PULLUP); myGizwits.begin(); } void wifi...
再看一个程序函数:pinMode() 在setup函数里,有个初始化的内容: pinMode()函数官方说明: 通过pinMode()函数,你可以将Arduino的引脚配置为以下三种模式: 1、输出(OUTPUT)模式 2、输入(INPUT)模式 3、输入上拉(INPUT_PULLUP)模式 (仅支持Arduino 1.0.1以后版本) 在输入上拉(INPUT_PULLUP)模式中,Arduino将开启...