compile error with watchy V1.0 and arduino ide 2.3.3 ('GPIO_SEL_32' was not declared in this scope) #271 ...

Evaluate the often irrelevant supplemental interpretations the Arduino IDE provides on Keyboard and Mouse library-related compilation errors. Can false interpretations be reduced? Can the ...

How to fix ‘was not declared in the scope’ error? There are the quick fixes for the Arduino error: was not declared in the scope. Declare the variable Before assigning a value to the variable, make ...

If you keep getting the same Arduino error was not declared in this scope, make sure to declare a variable before assigning a value to it.

To fix Arduino upload error, make sure you've selected the right board in the Arduino IDE, remove pins from the board, and reset the board.

In case you missed it, the big news is that a minimal Arduino core is up and working on the ESP32. There’s still lots left to do, but the core functionality — GPIO, UART, SPI, I2C, and … ...

Some of the first steps toward working with Arduino is understanding how to write code for it. The good news is that it's made with beginners in mind.

[Brett] sent us a note about his work on the new Arduino PID library. He is the author of the original library and recently decided it was time for a ground-up rewrite.