红外线发射器与接收器模块使用教学

• 硬件介绍
• 

（上图为红外线接受模块，下图为红外线发射模块）

红外线接受模块和红外线发射模块均与led外设相同，有三根引脚，其硬件连接方式也大致相同。红外线接受模块只用于空调红外线的解码，而在实品的运用中，仅有一个发射模块即可。

• 代码讲解

1. 红外线接受

在此工程中仅需要接受模块，代码如下：

#include 
#include 
#include 
#include 
const uint16_t kRecvPin = 2;    //数据引脚选择（2 = IO2）
IRrecv irrecv(kRecvPin);
decode_results results;
void setup() 
{
  Serial.begin(115200);    //串口通讯波特率
  irrecv.enableIRIn();     // 初始化红外接收模块（开始接收）
  while (!Serial)          //等待初始化完成   
  delay(50);
  Serial.println();
  Serial.print("IRrecvDemo is now running and waiting for IR message on Pin ");            //打印红外接收模块正在运行
  Serial.println(kRecvPin);   //打印红外接收端口

}
void loop() 
{
  if (irrecv.decode(&results)) 
    {          //判断是否接收到红外信号
        serialPrintUint64(results.value, HEX);     //打印红外信号数据（串口监视器查看）
        Serial.println("");
        irrecv.resume();     //接收下一个值
    }
  delay(100);
}

（这个代码仅需要调节引脚的选择，如果报错的话可能是缺少指定的库，这时可以点开工具，然后找到管理库，在里面输入缺少的库，然后安装即可）

烧录完成后，打开工具 -> 串口监视器，将波特率调至115200，对着红外接收模块按动电视遥控按键，将会出现如图所示十六进制数据，这便是空调遥控器各个按键所对应的数据，记录下来即可。

注：同一个按键，连续按上两次的代码也不一样

1. 红外线发射

#define BLINKER_PRINT Serial

#define BLINKER_WIFI

#include 

#include   //红外头文件

#include   //点灯科技头文件



char auth[] = "";//这里面填写设备的密钥key

char ssid[] = "";//这里填写你的wifi名字

char pswd[] = "";//这里填写你的WiFi密码



//定义红外发射的管脚

const uint16_t kIrLed = 14;  // 设置kIrLed为GPIO14，D5脚

IRsend irsend(kIrLed);  // 将kIrLed设置发送信息



//空调开：25、制冷、大风

uint16_t power_on[199] = {5998, 7318,  478, 1712,  540, 1622,  474, 1712,  542, 1622,  474, 1712,  542, 1620,  474, 1714,  542, 1622,  474, 596,  568, 532,  456, 618,  568, 532,  476, 598,  570, 532,  478, 596,  570, 532,  478, 1712,  542, 1622,  474, 1712,  542, 1622,  474, 1712,  542, 1622,  474, 1714,  542, 1622,  474, 598,  568, 532,  456, 618,  568, 532,  478, 598,  568, 532,  478, 596,  570, 532,  478, 1712,  544, 1622,  474, 1714,  542, 1622,  474, 1712,  544, 1622,  474, 1712,  544, 1622,  474, 598,  570, 532,  456, 618,  568, 532,  476, 600,  566, 532,  478, 602,  566, 530,  478, 1710,  546, 532,  456, 1732,  522, 556,  454, 1732,  546, 532,  526, 1660,  546, 1622,  526, 576,  514, 1650,  476, 626,  514, 1646,  478, 626,  548, 1612,  510, 594,  554, 522,  506, 596,  552, 1610,  506, 1660,  576, 524,  504, 1662,  572, 528,  502, 1664,  566, 1622,  502, 1664,  562, 536,  504, 574,  536, 1652,  504, 576,  534, 1654,  504, 596,  508, 570,  502, 598,  506, 1660,  502, 598,  506, 1660,  502, 598,  504, 1664,  498, 600,  502, 600,  476, 1692,  474, 626,  472, 1718,  448, 630,  470, 1720,  448, 630,  470, 1720,  448, 1720,  470, 7384,  446};  // GOODWEATHER D5292A000000

//空调开：25、制冷、自动风

uint16_t power_on_auto[199] = {6036, 7330,  476, 1716,  514, 1650,  474, 1716,  516, 1650,  474, 1716,  514, 1652,  520, 1670,  514, 1652,  524, 550,  542, 560,  456, 650,  514, 558,  476, 628,  514, 560,  478, 628,  514, 560,  476, 1718,  514, 1652,  474, 1716,  516, 1650,  476, 1716,  514, 1652,  474, 1716,  514, 1652,  474, 600,  540, 562,  456, 648,  514, 560,  476, 628,  512, 562,  478, 598,  540, 562,  456, 624,  538, 1654,  452, 622,  540, 1654,  452, 1738,  512, 1654,  452, 1738,  512, 1652,  454, 1738,  514, 562,  476, 1718,  514, 560,  456, 650,  514, 560,  476, 630,  512, 562,  476, 1718,  514, 560,  478, 1716,  514, 560,  478, 1718,  512, 1654,  454, 1738,  514, 1652,  454, 650,  510, 1654,  474, 630,  512, 1652,  504, 600,  514, 560,  508, 598,  514, 560,  506, 600,  512, 1652,  504, 1688,  514, 560,  508, 1686,  516, 560,  506, 1686,  516, 1652,  504, 1686,  518, 558,  506, 596,  542, 1624,  506, 596,  546, 1622,  528, 574,  552, 524,  558, 544,  580, 1586,  556, 548,  578, 1586,  562, 540,  578, 1586,  560, 546,  576, 500,  526, 1640,  602, 502,  552, 1614,  602, 500,  524, 1640,  602, 502,  498, 1668,  574, 1616,  502, 7332,  456}; // GOODWEATHER D5290A050000

//空调开：26、制冷、大风

uint16_t power_on_26[199] = {6062, 7302,  476, 1718,  538, 1628,  474, 1716,  540, 1626,  454, 1740,  514, 1650,  472, 1718,  516, 1650,  452, 620,  542, 560,  528, 546,  544, 560,  456, 620,  544, 560,  458, 618,  544, 558,  478, 1716,  516, 1650,  452, 1740,  514, 1650,  454, 1738,  516, 1650,  474, 1718,  514, 1652,  454, 618,  544, 558,  458, 620,  542, 560,  456, 620,  544, 560,  456, 620,  544, 560,  528, 1668,  516, 558,  476, 1718,  540, 1626,  476, 1716,  516, 1650,  454, 1738,  516, 1650,  474, 600,  544, 1650,  476, 598,  544, 560,  476, 602,  542, 560,  476, 604,  540, 560,  456, 1740,  514, 560,  476, 1718,  538, 536,  456, 1740,  538, 536,  456, 1738,  516, 1650,  476, 628,  514, 1652,  454, 648,  514, 1652,  454, 648,  514, 1652,  476, 626,  516, 562,  506, 1684,  546, 532,  532, 1660,  552, 524,  556, 1634,  582, 496,  560, 1634,  580, 1584,  562, 542,  580, 1584,  560, 544,  578, 1586,  530, 574,  576, 1588,  530, 576,  548, 526,  504, 602,  546, 1618,  504, 576,  568, 1620,  502, 578,  564, 1624,  504, 576,  562, 536,  502, 1666,  538, 562,  504, 1666,  536, 564,  504, 1666,  534, 566,  502, 1690,  510, 1658,  504, 7332,  502};  // GOODWEATHER D52A2A020000

//空调关：

uint16_t power_off[199] = {6022, 7290,  476, 1714,  510, 1650,  472, 1714,  512, 1650,  518, 1668,  510, 1652,  472, 1714,  512, 1650,  474, 626,  510, 560,  454, 648,  512, 562,  474, 598,  542, 562,  476, 598,  540, 560,  476, 1714,  512, 1650,  472, 1714,  512, 1648,  474, 1712,  512, 1650,  474, 1712,  512, 1650,  474, 598,  538, 560,  508, 568,  538, 560,  476, 596,  542, 560,  476, 628,  510, 562,  476, 1714,  512, 1650,  474, 1714,  510, 1650,  474, 1714,  512, 1650,  474, 1714,  512, 1650,  474, 626,  510, 562,  506, 596,  512, 560,  476, 628,  512, 560,  500, 602,  512, 562,  476, 1714,  514, 1648,  502, 1686,  512, 560,  502, 1688,  514, 560,  508, 1682,  514, 1648,  506, 594,  514, 560,  504, 598,  514, 1650,  502, 596,  516, 1648,  502, 598,  516, 556,  508, 596,  514, 1650,  504, 1682,  518, 558,  506, 1682,  520, 556,  504, 1684,  522, 1644,  504, 1682,  550, 528,  504, 596,  550, 1614,  530, 570,  578, 1586,  558, 544,  578, 498,  560, 542,  576, 1586,  562, 542,  576, 1586,  560, 544,  576, 1586,  558, 546,  576, 502,  552, 1612,  600, 502,  520, 1644,  598, 532,  470, 1664,  572, 530,  500, 1664,  570, 1620,  500, 7328,  456};  // GOODWEATHER D52928000000





// 新建Blinker组件对象

BlinkerButton Button1("btn-on");

BlinkerButton Button2("btn-on-auto");

BlinkerButton Button3("btn-26");

BlinkerButton Button4("btn-off");



void setup()

{

  //初始化串口

  Serial.begin(115200);

  //注册回调函数/

  Button1.attach(Button1_callback);

  Button2.attach(Button2_callback);

  Button3.attach(Button3_callback);

  Button4.attach(Button4_callback);

 //配网步骤：WIFI接入

  Blinker.begin(auth,ssid,pswd);

  //红外初始化

  irsend.begin();



}



void loop()

{

  Blinker.run();

}



//回调函数1

void Button1_callback(const String &state)

{



  BLINKER_LOG("get button state: ", state);

  //检测到普通按钮按下（btn-on）

  if (state == BLINKER_CMD_BUTTON_TAP)

  {

    //发送红外指令

    irsend.sendRaw(power_on, 199, 38);  // 以38Khz发送红外数据

    Button1.print("宿舍空调开:25，制冷，大风");

  

  }



}



//回调函数2

void Button2_callback(const String &state)

{

  BLINKER_LOG("get button state: ", state);

  //检测到btn-on-auto按钮按下

  if (state == BLINKER_CMD_BUTTON_TAP)

  {

    irsend.sendRaw(power_on_auto, 199, 38);  // 以38Khz发送红外数据

    Button2.print("宿舍空调开:25，制冷，自动风");

  }



}



//回调函数3

void Button3_callback(const String &state)

{



  BLINKER_LOG("get button state: ", state);

  //检测到按钮btn-26按下

  if (state == BLINKER_CMD_BUTTON_TAP)

  {

    //发送红外指令

    irsend.sendRaw(power_on_26, 199, 38);  // 以38Khz发送红外数据

    Button1.print("宿舍空调开:26，制冷，大风");

  

  }



}



//回调函数4

void Button4_callback(const String &state)

{

  BLINKER_LOG("get button state: ", state);

  //检测到btn-off按钮按下

  if (state == BLINKER_CMD_BUTTON_TAP)

  {

    irsend.sendRaw(power_off, 199, 38);  // 以38Khz发送红外数据

    Button2.print("宿舍空调关");

  }



}

（基于用手机控制led的基础，我们可以发现这些代码看似很多，但是其实十分简单，每一个回调函数其实就是对应着我们手机里的一个按键，而类如标红的那一串看似最麻烦的数组，其实就是我们解码所得到的数据。换句话说，我们只需要修改wifi密码、秘钥和按钮所对应的空调红外代码即可）

• 成品效果

1. 可以通过手机来远程开启与关闭空调
2. 可以通过手机来调节空调温度
3. 根据自身经验，可以一键使空调调节至最舒适的情况

（ps：由于硬件本身的问题，调试红外线发射器的时候需要离空调近一点才能对空调进行控制，建议两两一组，一个发射一个接受，验证是否运行正常）