concatenation: string vs String?

Projects Programming
1

Hi guys. I have some code that takes a character array, but I need to build it dynamically by joining three Strings together. What I have works well enough, but I'm wondering if it would be worthwhile to try and eliminate Strings altogether.

The code I have:
Devices[current_Device] is an array of two Strings containing the device IDs for two bluetooth devices.

//Create the character array to pass to the Serial1.write function
    String AT_String = "AT+RNAME? " + Devices[current_Device] + "\r\n";
    char charBuf[AT_String.length()+1];
    AT_String.toCharArray(charBuf, AT_String.length()+1);

Do you think I should set it up to not use Strings? If so, any ideas to help get me started?

2

but I need to build it dynamically by joining three Strings together.

Why? I can't think of a single instance where sending/printing all three individually will not work just as well.

3

Hmmm...I hadn't thought of that. So, until the device receives the CR and LF signals, it just adds onto the current command?

So....something like this?

Serial1.write("AT+RNAME? ");
serial1.write(Devices[current_Device]);
Serial1.write("\r\n");
4

So, until the device receives the CR and LF signals, it just adds onto the current command?

That depends on the device, but, yeah, usually.