fix：添加缓存

server-common/src/main/java/com/makeit/module/iot/service/IotProductDeviceService.java

@@ -161,8 +161,8 @@ public class IotProductDeviceService extends IotCommonService {
             int movebodyRandomLong = RandomUtils.nextInt(40,90);
             deviceInfoContentBreathe = new DeviceInfoContentBreathe();
             LocalDateTime localDateTime = startTime.plusMinutes(i);
-            Timestamp timestamp = new  Timestamp(localDateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
-            deviceInfoContentBreathe.setTimestamp(timestamp.getDateTime());
+            long timeStamp = localDateTime.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
+            deviceInfoContentBreathe.setTimestamp(timeStamp);
             DeviceInfoContentBreathe.Properties properties = new DeviceInfoContentBreathe.Properties();
             properties.setBr(brRandomLong);
             properties.setHr(hrRandomLong);