1跳线：把s17按键上面最左边的跳线帽插上 2功能：当按键每按下一次，学会检测按键，按键每按下一次，8个小灯亮灭交替一次，-1 lines: the jumper cap S17 buttons on the left of the plug2 function: when each time the button is pressed, learn test button, press the button each time, 8 turn off lights at