### Project 11 IR Remote Control Smart Car

![](media/wps1-1766556391791-1.png)

**1.Description** 

In this project, we will work to control the car using an IR remote control.

**2.Flow Diagram**

![](media/wps2-1766556435074-3.png)

**3.Test Code**

```c
#include "MecanumCar_v2.h"
mecanumCar mecanumCar(20, 21);  //sda-->20,scl-->21

#include "ir.h"
IR IRreceive(6);//IR receiver is connected to GP6

void setup()
{
  mecanumCar.Init(); //Initialize the seven-color LED and motor drive
}

void loop() 
{
  int key = IRreceive.getKey();
  if (key != -1) 
  {
    Serial.println(key);
    switch (key)
    {
      case 64: mecanumCar.Stop();       break;  //Stop
      case 70: mecanumCar.Advance();    break;  //Advance
      case 21: mecanumCar.Back();       break;  //Move back
      case 68: mecanumCar.Turn_Left();  break;  //Turn left
      case 67: mecanumCar.Turn_Right(); break;  //Turn right
    }
  }
}
```

**4.Test Result**

Uploading the test code and powering up. When we press the button![](media/wps3-1766556539937-5.jpg)on the remote control, the car moves forward, then ![](media/wps4.jpg), the car turns left, ![](media/wps5-1766556609154-8.jpg),the car moves back,![](media/wps6.jpg), the car turns right,![](media/wps7.jpg), the car stops.

**5.Code Explanation**

| switch (key)<br>{<br>case num:..... break;<br>} | The switch statement, used with case, executes the statement after case when the variable in parentheses is the value after case |
| ----------------------------------------------- | ------------------------------------------------------------ |
| case 64: mecanumCar.Stop();                     | The car will stop                                            |
| case 70: mecanumCar.Advance();                  | The car will go forward                                      |
| case 21: mecanumCar.Back();                     | The car will move back                                       |
| case 68: mecanumCar.Turn_Left();                | The car will turn left                                       |
| case 67: mecanumCar.Turn_Right();               | The car will turn right                                      |