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What Happens to SmartThings When Your Internet Goes Down?

Some SmartThings hub-connected devices may keep working during an internet outage, but cloud-linked products and routines can lose control. The outcome depends on your devices, drivers, hub and local network.
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SmartThings may keep some devices and automations working during an internet outage, but it is not guaranteed to work fully offline. Supported hub-connected devices can use local processing when the hub and home network remain powered; cloud-linked products and services may stop responding. What continues depends on the device, its driver, the automation and what actually failed.

What can keep working without internet?

SmartThings Edge moves supported hub-connected device commands and automations from cloud processing to the hub. SmartThings says Edge drivers run locally on the hub, which means compatible devices can have a local control path even when the home loses its internet connection. That applies only to supported device and driver combinations; it is not a promise that every SmartThings feature works offline.

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SmartThings describes Edge as moving processing for hub-connected commands and automations to the hub, where they operate locally within the home. See SmartThings’ Platform Transition FAQ and its Edge Drivers for New Devices FAQ.

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Which devices depend on a hub or the cloud?

The connection type is a useful first clue. SmartThings says Zigbee, Z-Wave and LAN-connected devices require an enabled hub. Hub-connected devices may benefit from Edge local processing if they have a supported driver. See SmartThings Enabled Hubs and Devices in SmartThings.

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Cloud-based devices have a different dependency: SmartThings’ app guide says they require a connection to the manufacturer’s service. If an internet outage prevents that connection, SmartThings may not be able to control the device through that service. A hub does not restore access to a manufacturer’s cloud. See Using the SmartThings App.

What to check What it means during an outage
Device connects through Zigbee, Z-Wave or LAN to a hub Local operation may be possible with a supported Edge driver and a functioning hub.
Device is linked through a manufacturer’s cloud service Control may fail if that service cannot be reached over the internet.
Device or integration’s driver is not confirmed to run locally Do not assume commands or automations will continue offline.

Will SmartThings routines still run?

Some routines may continue if their triggers, actions and devices are handled locally by supported hub-connected equipment. But SmartThings’ routine documentation does not say that all routines execute locally or remain available offline. A routine involving a cloud-linked device or another online service can lose part of its control path.

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SmartThings documents routines triggered by time, day, device activity or manual action, but the trigger alone does not establish whether every action runs locally. Check the devices and integrations used by the specific routine. See Routines in SmartThings.

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Internet outage, Wi-Fi failure and power loss are different

If only the provider’s internet connection is down, the router, hub and local devices may still be powered and communicating inside the home. That is the situation in which local Edge processing may help. If the router or local network fails, LAN-connected devices may become unreachable. If the hub loses power, it cannot process commands locally; a broader power failure can also disable devices and network equipment.

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These distinctions follow from SmartThings’ description of processing on the hub and its hub requirements for certain device connections; they are not a guarantee that a particular setup will work through any specific failure.

How to check your SmartThings setup

  1. Identify the connection path. In the SmartThings app, check the device’s details and determine whether it connects through a hub or through a linked manufacturer service. For Zigbee, Z-Wave and LAN devices, confirm that an enabled, compatible hub is in use.
  2. Check local-driver support. Find out whether the device uses a SmartThings Edge driver that runs on your hub. Confirm current compatibility for the hub model and device rather than relying on old model lists or transition dates.
  3. Review each important routine. Note its trigger, every device action and any cloud service, presence feature or voice-assistant integration it depends on. Local execution of one device action does not prove that the whole routine works offline.
  4. Test non-critical controls before you need them. If practical, briefly disconnect internet access while leaving the router, hub and devices powered, then check the specific controls you rely on. Restore service afterward and avoid testing safety-critical functions as a substitute for their normal safeguards.
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Does adding a SmartThings hub solve the problem?

A compatible SmartThings-enabled hub is relevant if you have Zigbee, Z-Wave or LAN-connected devices that require one, or if you want local Edge processing for supported devices. It is not a universal offline fix: it cannot provide internet access to a manufacturer’s cloud service, and it cannot help if the hub or local equipment is down. Check device and hub compatibility before buying or configuring hardware.

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