Reply To: Editing Variable UUIDs

It looks like when you created your sketch, instead of starting with a completely empty file you pasted your code into the middle of the Arduino IDE’s placeholder code.  So there are chunks of that at the beginning and end which you need to remove.

From the beginning, delete this :

void setup() { // put your setup code here, to run once: } void loop() { // put your main code here, to run repeatedly:

From the end, delete this :

} // ========================================================================== // Main loop function // ==========================================================================

The last line in your code should be a closing curly brace.