3 /dev/ttyUSB0 gpio,serial,command echo "Hello world! $(date)" 1,2,3,4 20110822 20120601 0 0 0 0 1 20111123-20111125 20111216-20120102 201112241950-201112242000 20111129 20111114-20111118 8:00 8:45 8:47 8:57 9:00 9:45 9:48 10:33 10:36 11:21 11:24 11:54 11:57 13:27 13:30 14:15 15:00 8:00 8:35 8:38 9:23 9:26 10:01 10:04 10:39 10:42 11:17 11:47 12:22 12:25 13:00 13:03 13:38 13:40 14:00 11:44 8:00 8:47 8:49 8:59 9:02 9:50 9:53 10:40 10:43 11:30 8:35 8:37 9:05 9:07