public MixEnvelop<IotDeviceVO, IotDeviceVO> findDevice() {
String sql ="SELECT DISTINCT c.* from iot_device c left join iot_patient_device t on t.del = 1 AND c.device_sn = t.device_sn WHERE c.del=1 GROUP BY c.`name`";
List<IotDeviceDO> list = jdbcTempalte.query(sql,new BeanPropertyRowMapper(IotDeviceDO.class));