Question

我正在开展一个项目，我通过串口将数字发送到射频发射器。另一方面，接收器连接到Arduino。 Visual Basic程序正在发送数字，Arduino程序用于接收这些数字并用它们来控制电机。（我们需要为电机提供PWM信号）但是，由于某种原因，Arduino程序没有正确接收数字，因此电机无法按要求运行。我试图从Arduino向PC发送一个号码，但我只收到垃圾。这些是我正在使用的发射器和接收器：

http://www.alldatasheet.com/datasheet-pdf/pdf/344352/KYL/KYL-210.html

发送器和接收器发送的值类型是否有问题？或者Arduino计划会出现问题吗？

以下是该计划：

int i = 0;

int MLmosfet1_4 = 10;
int MLmosfet2_3 = 12;

int MRmosfet1_4 = 2;
int MRmosfet2_3 = 5;

void setup()
{
  pinMode(MLmosfet1_4, OUTPUT);
  pinMode(MLmosfet2_3, OUTPUT);

  pinMode(MRmosfet1_4, OUTPUT);
  pinMode(MRmosfet2_3, OUTPUT);

  Serial.begin(9600); // This opens serial port 
                      // and sets data rate at 9600 bps
}

void loop()
{
  byte record[2] = {0};
  byte state = 0;
  byte currentState = 0;

  if (Serial.available()) // check if data has been sent from the computer
  {
    state = Serial.read(); // reads the most recent byte (from 0 - 255)

if(i % 2 == 0) // THIS PART CHECKS WERE TO FILL IN ARRAY SO AS TO HAVE MEMORY EFFECT
{
  record[0] = state;
}

else
{
  record[1] = state;
}

if (state>=0 && state <=63) //forward
{
  currentState = state * 4; //0 - 252

  analogWrite(MLmosfet1_4, currentState); //steady 5V 
  analogWrite(MLmosfet2_3, 0); // 0V

  analogWrite(MRmosfet1_4, currentState); //steady 5V 
  analogWrite(MRmosfet2_3, 0); // 0V
}

else if (state>=64 && state<=127) //reverse
{
  currentState = (state-64)*4; //0 - 252

  analogWrite(MLmosfet1_4, 0); // 0V
  analogWrite(MLmosfet2_3, currentState); // steady 5V

  analogWrite(MRmosfet1_4, 0); // 0V
  analogWrite(MRmosfet2_3, currentState); // steady 5V

}

else if(state>=128 && state <=191) //left
{
  currentState = (state - 118); //input will be 10 - 73

  if(i % 2 == 0)
  {
    if (record[1] >=0 && record[1] <=63) //previous action was move forward
    {
      analogWrite(MLmosfet1_4, currentState); //approx 25% duty cycle 
      analogWrite(MLmosfet2_3, 0); // 0V

      analogWrite(MRmosfet1_4, record[1]); //keeps previous forward speed 
      analogWrite(MRmosfet2_3, 0); // 0V
    }

    else //means that previous action was reverse
    {
      analogWrite(MLmosfet1_4, 0); // 0V
      analogWrite(MLmosfet2_3, currentState); // approx 25% duty cycle

      analogWrite(MRmosfet1_4, 0); // 0V
      analogWrite(MRmosfet2_3, record[1]); // keeps previous reverse speed
     }
  }

   else // i  is odd, therefore we have to read from reord[0]

   {
    if (record[0] >=0 && record[0] <=63) //previous action was move forward
    {
      analogWrite(MLmosfet1_4, currentState); //approx 25% duty cycle 
      analogWrite(MLmosfet2_3, 0); // 0V

      analogWrite(MRmosfet1_4, record[0]); //keeps previous forward speed 
      analogWrite(MRmosfet2_3, 0); // 0V
    }

    else //means that previous action was reverse
    {
      analogWrite(MLmosfet1_4, 0); // 0V
      analogWrite(MLmosfet2_3, currentState); // approx 25% duty cycle

      analogWrite(MRmosfet1_4, 0); // 0V
      analogWrite(MRmosfet2_3, record[0]); // keeps previous reverse speed
     }
   }
}

else if(state>=192 && state <=255) //right
{

  currentState = (state - 118); //input will be 10 - 73

  if(i % 2 == 0)
  {
    if (record[1] >=0 && record[1] <=63) //previous action was move forward
    {
      analogWrite(MLmosfet1_4, record[1]); //keeps previous forward speed
      analogWrite(MLmosfet2_3, 0); // 0V

      analogWrite(MRmosfet1_4, currentState); //approx 25% duty cycle   
      analogWrite(MRmosfet2_3, 0); // 0V
    }

    else //means that previous action was reverse
    {
      analogWrite(MLmosfet1_4, 0); // 0V
      analogWrite(MLmosfet2_3, record[1]); // keeps previous reverse speed

      analogWrite(MRmosfet1_4, 0); // 0V
      analogWrite(MRmosfet2_3, currentState); // approx 25% duty cycle 
     }
  }

   else // i  is odd, therefore we have to read from reord[0]
   {
    if (record[0] >=0 && record[0] <=63) //previous action was move forward
    {
      analogWrite(MLmosfet1_4, record[0]); //keeps previous forward speed  
      analogWrite(MLmosfet2_3, 0); // 0V

      analogWrite(MRmosfet1_4, currentState); //approx 25% duty cycle  
      analogWrite(MRmosfet2_3, 0); // 0V
    }

    else //means that previous action was reverse
    {
      analogWrite(MLmosfet1_4, 0); // 0V
      analogWrite(MLmosfet2_3, record[0]); // keeps previous reverse speed

      analogWrite(MRmosfet1_4, 0); // 0V
      analogWrite(MRmosfet2_3, currentState); // approx 25% duty cycle 
    }
   }
}

i++;
  }
}

Answer 1

您可以通过将其中一个连接到PC（使用RS232接口）来测试发射器和接收器，将另一个连接到arduino引脚0 Rx和Tx（使用TTL接口）。一旦你连接它，将arduino连接到电源，打开arduino IDE，并设置arduino连接到COM端口1（主板上的串行接口）。只是尝试运行其中一个示例，看看它是否有效。

注意接口方法非常无能，arduino使用TTL和PC使用RS232，根据数据表它应该由一些跳线设置，我对吗？

Answer 2

我首先调试没有任何代码的连接

将RF RX和RX连接到pc use putty或任何其他终端以连接到两个来端口，在TX终端上键入一些文本并查看RX终端中出现的内容。

如果这样可以将RX连接到arduino并使用终端向其发送数据。如果现在你的arduino正在工作，那么它的VB有一个错误，如果它不工作，那么arduino代码有问题。

这些RS232问题通常与软件中COM端口的波特率设置有关。确保双方都设置为相同的波特率确保检查数据速率设置为9600的VB代码，就像在arduino上一样。

Answer 3

我会使用一个简单的程序来点亮LED，以查看问题是否与电机代码无关。你也不应该检查if (Serial.available() > 0)

编程Arduino进行RF传输

3 个答案: