Introduction - If you have any usage issues, please Google them yourself
* 1) Key Status Description:* keys using queries judgments, each will be tested once left a previous state and record the latest detection status.* Low-key status only take three:* 000- did not detect keystrokes to 001- first detected keystroke* 011-* 111 keys stable closure- Button continued closed* 110- first detected key released* 100- Button stable release* 010- positive pulse jitter interference, the state is set to 000* 101- Negative pulse jitter interference, the state is set to