+= operator and Concat issues

There seems to be somewhat of an issue when i'm trying to add a char to a string. When this code uploads, nothing shows, but when using the Slave Receiver example, it reads what I want but without combining them together.

My code is below.

Code:

while(Wire.available())    
  { 
    char c = Wire.read();    
    result += c;  //adds the read character to string to build full reading info. E.g. "2-20"
    
  }
  Serial.println(result); //prints result which is in turn picked up by control panel software
  result = ""; //reset string

Any help would be greatly appreciated

Ryan

 

Don't have access to my Udoo or arduino right now, but try this:

Try casting the char to a string and using Concat:

result.concat((String) c);

That way you're appending a string to a string, rather than a char to a string.


What sort of result are you seeing with the code you posted?

 

Thanks for your reply.

I tried using the += and concat functions, and nothing at all would show, and if i attempted to modify the sketch, to just add a print statement, nothing at all would show. It essentially broke the sketch. I'll get it tested on my udoo tomorrow morning.

Thanks!

P.S I wrote the code on an Uno originally, and worked perfectly.