select * from data where sn='max1' order by id desc limit 4
idsntspqvaluesystemts
6107348 max1 rawa 57 1505613499 Sun 17 09 2017 03:58:19
6107347 max1 rawv 267 1505613499 Sun 17 09 2017 03:58:19
6107346 max1 volt 6.519 1505613499 Sun 17 09 2017 03:58:19
6107345 max1 curr 0.605 1505613499 Sun 17 09 2017 03:58:19

Tue May 21 21:52:56 2019 by walley