串口模块程序，可以实现串行发送和接收功能，比特率可以不断调整，数据的长度是可以改变的-Serial port module program, you can achieve the serial send and receive functions, and bit rate can be continuously adjusted, the data length can be changed
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001985s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.178639s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.002052s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003029s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001612s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005821s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001645s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.006329s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.018865s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001686s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 310849 [ RunTime:0.001643s ]
