hakan24:
Can I have an example of the use of cstring - char arrays (with '\0' terminated). I will change string into cstring - char arrays but I don't know how to do it. It will be very helpful if i can have several examples.(I use Arduino TIAN)
Are you asking about converting a String to a string? You go first. You post the code that wastes resources using a String. and we'll help you understand how not to do that.