I get the following compile message: Warning: Large amount of SRAM memory used. Consider using PROGMEM or F("text") macro to reduce ram usage. I only use one small int array (int x). What is PROGMEM or F("text") macro and how do I use in my sketch? Any suggestions on reducing memory in my sketch?
Binary sketch size: 21,150 bytes (of a 32,256 byte maximum) Estimated used SRAM memory: 1,464 bytes (of a 2048 byte maximum)
I can't insert my code because "The message will exceed the maximum allowed length (9500 characters)".