Each sensor needs an online Cloud Connector within range to send data to the cloud. If there is a power outage, cellular outage, or similar infrastructure issue, sensor data can be lost during the downtime. This article explains when data loss can happen and what exceptions are available.
Who is this article for?
Anyone using DT sensors who is concerned about losing sensor data during connectivity issues, power outages, or other infrastructure disruptions.
How sensor data can be lost
Sensors do not store data on their own - they rely on a nearby Cloud Connector that is online to relay data to the cloud. If the Cloud Connector loses power or its cellular connection goes down, any sensor readings during that time will not be saved.
Exception: Data Backfill for temperature sensors
Some sensors offer an optional Data Backfill feature that can recover data that was missed while the Cloud Connector was offline. This feature is available for the following sensor types:
With Data Backfill enabled, these sensors temporarily store readings and send them to the cloud once the Cloud Connector comes back online.
Troubleshooting / FAQ
Q: Will I always lose data if my Cloud Connector goes offline?
A: For most sensor types, yes, any readings taken while the Cloud Connector is offline will be lost. However, if you are using a Temperature, Temperature Probe, or Temperature & Humidity sensor with the Data Backfill feature enabled, those sensors can recover missed data once connectivity is restored.
Q: Does Data Backfill work for all sensor types?
A: No. Data Backfill is only available for Temperature sensors, Temperature Probe sensors, and Temperature & Humidity sensors.