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我有一个应用程序，我使用 MCP3421 18 位 ADC 读取模拟数据。设置为 Xbee+Xbee Sheild+Arduino + MCP3421 作为发射器。我正在读取并传输到带有 LCD 的远程 xbee+arduino 模块。数据在 LCD 上显示良好。但是我想在串口上接收数据。当我尝试 tp 做一个 Serial.println(s); 在接收代码上，我在串口上获得的数据是乱码。将不胜感激任何帮助

这是我的代码

传输

#include  <Wire.h>
#include <LiquidCrystal.h>
#define TRUE 1
#define FALSE 0
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
void setup(void)
{
  Serial.begin(9600);
  Wire.begin();
  delay(100);
  Serial.println(">>>>>>>>>>>>>>>>>>>>>>>>");  // just to be sure things are working
  lcd.begin(16, 2);
}

void loop(void)
{

  byte address, Hi, Lo, Config;
  int ADVal;

  while(1)
  {
    address = 0x68;
    Wire.beginTransmission(address);
    Wire.write(0x88);   // config register %1000 1000
    // /RDY = 1, One Conversion, 15 samples per, PGA = X1

    Wire.endTransmission();

    delay(1);
    Wire.requestFrom((int)address, (int) 3);
    Hi = Wire.read();
    Lo = Wire.read();
    Config = Wire.read();
    Wire.endTransmission();

    ADVal = Hi;
    ADVal = ADVal * 256 + Lo;

    //  Serial.print(ADVal, DEC);
    //Serial.print("  ");
    //Serial.println(Config, DEC);
    Serial.print("<");
    Serial.print(ADVal);
    Serial.print(">");


    //lcd.setCursor(0,0);
    //lcd.print(ADVal);
    lcd.setCursor(0,1);
    //float val = ADVal * 0.00006244087;
    //lcd.print(val,3); 
    delay(1);
  }
}

这是接收代码

#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2); // initialize the library with the numbers of the interface pins
bool started = false;
bool ended= false;
char inData[10]; // Leave plenty of room
byte index;
float i;

//char inData[24]; // Or whatever size you need
//byte index = 0;

void setup(){
  // set up the LCD's number of columns and rows: 
  lcd.begin(16, 2);
  // initialize the serial communications:
  Serial.begin(9600);
}

void loop()
{
  //Serial.println(s);
  while(Serial.available() > 0)
  {
    char aChar = Serial.read();
    if(aChar == '<')
    {
      // Start of packet marker read
      index = 0;
      inData[index] = '\0'; // Throw away any incomplete packet
      started = true;
      ended = false;
    }
    else if(aChar == '>')
    {
      // End of packet marker read
      ended = true;
      break; // Done reading serial data for now
    }
    else
    {
      if(index < 10) // Make sure there is room
      {
        inData[index] = aChar; // Add char to array

        index++;
        inData[index] = '\0'; // Add NULL to end

      }
    }
  }

  // When we get here, there is no more serial data to read,
  // or we have read an end-of-packet marker
  if(started && ended)
  {
    // We've seen both markers - do something with the data here
    lcd.setCursor(0,0);
    i = atoi (inData);
    float s = (i * 0.3051851); //multiplying with calibration factor
    float value = ( s / 1000 );

    lcd.setCursor(1,0);
    lcd.print(value,3); // print value after multiplying with calibration factor to LCD

    lcd.setCursor(0,1 );
    lcd.print(i); // Print raw ADC counts as recieved from transmitter

    index = 0;
    inData[index] = '\0';
    started = false;
    ended = false;

  }
}

接收 arduino 确实通过 Xbee 获取数据，并在 LCD 上完美显示值（附加 PIC）。我还需要通过其 USB/串行端口在连接到接收 arduino 的 PC 上接收数据。

当我尝试使用串行监视器时，LCD 上的显示消失并且串行监视器显示乱码值。我认为 Serial.print(s) 正在将数据发送回 XBEE，因为 XBEE SHIELD 上的 DO 和 DI LED 都开始闪烁。

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