Need help with Char Array to String Object.

Projects Programming
1

So the following code works on a hardware serial port, but when used with SoftwareSerial the String is corrupted. What am I missing?

while (mySDI12.available() > 0)
  {
    inChar = (char)mySDI12.read();  // get the new byte:
    inputString += inChar;          // Concatenate char into string
    receivedString = String(inputString);  // String constructor, char array to object
    if (inChar == '!')               ///Test for SDI12 termination character
    { 
      RequestReceived = true;
      Serial.println(inputString);
      Serial.println(receivedString);
      inChar = 'X';
      inputString = "";
      receivedString = "";
      mySDI12.flush();
      break;
    }
  }

Result in Terminal window:
0C! - Char array displays fine
¹ - String Object unintelligible

2

Post all of your code.

This part of your code is wrong

    inputString += inChar;          // Concatenate char into string
    receivedString = String(inputString);  // String constructor, char array to object

If "inputString" is a String object ( you have not posted where this is declared, so who knows ), then the following line makes no sense.

In general, using the String class on the arduino is a bad idea.

3 
String inputString = "";        
String receivedString = "";
boolean RequestReceived = false;
char inChar = 'X';

void setup(){
  Serial.begin(9600); 
  while(!Serial){};
  mySDI12.begin(); 
}

void loop() 
{
    
  while (mySDI12.available() > 0)
  {
    inChar = (char)mySDI12.read();  // get the new byte:
    inputString += inChar;          // Concatenate char into string
    receivedString = String(inputString);  // String constructor, char array to object
    if (inChar == '!')               ///Test for SDI12 termination character
    { 
      RequestReceived = true;
      Serial.println(inputString);
      Serial.println(receivedString);
      inChar = 'X';
      inputString = "";
      receivedString = "";
      mySDI12.flush();
      break;
    }
  }
4

You say that you have problem with SoftwareSerial but don't use it in the code that you posted. As has been pointed out, inputString is already a String so why cast it to a String ?
    receivedString = String(inputString);  // String constructor, char array to objectJudging by the comment inputString may at one time have been a C style string because the comment does not make sense at the moment.

5

String libraries in Arduino need a String object not an Array of chars, hence the String = String(ArrayOfChars).

6

Youraagh:
String libraries in Arduino need a String object not an Array of chars, hence the String = String(ArrayOfChars).

But inputString is not an array of chars, it is a String.

From your code

String inputString = "";
7

Need help with Char Array to String Object

Some time in the past the below was posted to the forum.

void setup(void)
{
}

void loop(void)
{
  byte byteArray[5];
  strcpy((char *)byteArray,"0123");
  String myString = String((char *)byteArray);
}