String  msg = "@CSUX1#&C,0,0,0!";
String strs[20];
int StringCount = 0;

void setup (void)
{
  Serial.begin (115200);
  delay(200);
  
  Serial.println(msg);
 control("@CSUX1#&C,1,0,1!");
}

void loop () {}
void control(String msg) {
  int isAmpersand = msg.indexOf("&C,");
  int isExclamation = msg.indexOf('!');
  String strs[4];
  int StringCount = 0;
  if (isAmpersand != -1 && isExclamation != -1) {
    // loai loi ki tu # truoc @
    if (isExclamation - isAmpersand <= 0)
      return;
    String str = msg.substring(isAmpersand+3, isExclamation);
    Serial.println(str);
    // Split the string into substrings
    while (str.length() > 0)
    {
      int index = str.indexOf(',');
      if (index == -1) // No comma found
      {
        strs[StringCount++] = str;
        break;
      }
      else
      {
        strs[StringCount++] = str.substring(0, index);
        str = str.substring(index + 1);
      }
    }
    // Show the resulting substrings
    for (int i = 0; i < StringCount; i++)
    {
      Serial.print(i);
      Serial.print(": \"");
      Serial.print(strs[i]);
      Serial.println("\"");
    }
   int outFan= strs[0].toInt(),
    outDef= strs[1].toInt(),
    outComp= strs[2].toInt();
Serial.print(outFan);
Serial.print(outDef);
Serial.print(outComp);
  }
}