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Arduino:1.8.12 (Windows 10), Development board: "Arduino Uno" The project uses 6336 bytes, which occupies (19%) of the program storage space. The maximum is 32256 bytes. data section exceeds available space in board Global variables used 3046 bytes, (148%) of dynamic memory, leaving -998 bytes for local variables. The maximum is 2048 bytes. There is not enough memory; visit the following URL to follow the instructions to reduce memory usage. http://www.arduino.cc/en/Guide/Troubleshooting#size Error while compiling for development board Arduino Uno. Turn on in File -> Preferences "Show detailed output during compilation" option This report will contain more information.