@aattila Very great! arduino-esp32 version 1.0.5-rcX The compiled project will not work consistently because there is a wifi related bug and sometimes the button A (left) will receive the pushed event (many events) This problem should be cured after wifi.setSleep (False) after wifi.begin. Please refer to the following. https://macsbug.wordpress.com/2021/05/02/buttona-on-m5stack-does-not-work-properly/