original manufacturer source code link is here-
http://iteadstudio.com/application-note/arduino-library-for-ultrasonic-ranging-module-hc-sr04/
there is one example file which print range finding on serial. good luck
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001024s ]
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:0.087502s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001517s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.002014s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001698s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005489s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001617s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004842s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.027093s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001755s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 215245 [ RunTime:0.035630s ]
