select * from data where sn='NAVenku' order by id desc limit 4
idsntspqvaluesystemts
27202006 NAVenku temp 8.8 1571627421 Mon 21 10 2019 05:10:21
27202005 NAVenku hum 90 1571627421 Mon 21 10 2019 05:10:21
27201853 NAVenku temp 8.9 1571626807 Mon 21 10 2019 05:00:07
27201852 NAVenku hum 90 1571626807 Mon 21 10 2019 05:00:07

Mon Oct 21 05:15:15 2019 by walley