David Fenner asked 6 months ago
Hi
Could someone please help me in declaring a global text variable. So the variable can be changed with different text information within a given subroutine see example below for the concept of my objective.
I tried char FA[20];
Placed above void setup
With
void loop(){
FA = “In Loop”
SubOne;
SubTwo;
Rest of code
void subOne
FA = “subOne”
Rest of code
void subTwo
FA = “subTwo”
Rest of code
Using the above concept I get the following error from Arduino IDE 2.3.7
Incompatible types in assignment of ‘const char [14]’ to ‘char [20]’
I would very much appreciate if somebody could point me in the correct direction to achieve my objective.
Sara Santos Staff answered 6 months ago
Hi.
The easiest way to solve this issue is to declare your FA variable as a String.
String FA;
If you really want to use a const char, you need to understand that with char FA[20] you’re creating a fixed memory buffer, and to assign something to it, you must copy the text into it using the strcpy() function. You can learn more here: https://www.geeksforgeeks.org/c/strcpy-in-c/
I hope this helps.
Regards,
Sara