Passing char arrays to a function - best practice

[Scott216]

It depends on what else you are doing. But IMHO concatenating two strings for output is a bad idea. Better output the two strings separately thus avoiding unnecessary use of RAM. Also: if you are using string constants you should learn about progmem.

I need to concatenate the two strings together because the message is going out to Twitter. In the Tweet I want to have the message and a timestamp. If twitter sees two identical tweets one after the other it will just drop the 2nd one. The timestamp prevents this. I know I could just put millis() or something instead of the time, but that wouldn't change the need to concatenate two strings.