select * from data where sn='221' order by id desc limit 4
idsntspqvaluesystemts
62322635 221 temp 20.40 1662908720 Sun 11 09 2022 17:05:20
62322634 221 hum 72.30 1662908720 Sun 11 09 2022 17:05:20
62322623 221 hum 72.50 1662908700 Sun 11 09 2022 17:05:00
62322622 221 temp 20.40 1662908700 Sun 11 09 2022 17:05:00

Fri Feb 13 11:50:22 2026 by walley