select * from data where sn='12250' order by id desc limit 4
idsntspqvaluesystemts
78044858 12250 temp 28.62 1751838602 Sun 06 07 2025 23:50:02
78044797 12250 temp 28.62 1751838302 Sun 06 07 2025 23:45:02
78044740 12250 temp 28.62 1751838003 Sun 06 07 2025 23:40:03
78044679 12250 temp 28.69 1751837702 Sun 06 07 2025 23:35:02

Sun Jul 6 23:50:05 2025 by walley