There is no reason to use a String. Open the file. Then loop through the array of pins, reading a value and writing to the file. Then, close the file.
The String class has known issues. Don't use it (like this) just to be lazy.
There is no reason to use a String. Open the file. Then loop through the array of pins, reading a value and writing to the file. Then, close the file.
The String class has known issues. Don't use it (like this) just to be lazy.