SmartThings Support

What do the LED colours on the Hub v2 mean?

The LED of the Samsung SmartThings Hub (v2) displays a series of colours during its initial setup. A solid green LED indicates everything is connected and ready to go. This should result within just a few minutes of connecting the Hub’s power and ethernet cables and instructing the SmartThings mobile app to begin setup. The app will also indicate when the Hub is up and running.

If the LED is stuck on solid blue for over 5 minutes or blinks blue, however, this indicates the Hub is having trouble connecting. Reference the following article for tips on how to connect your Hub, or contact us at


LED Behavior

Read below for details about the Hub status lights and LED behaviour you may see during setup or everyday operations.


Blue (blinking)

What it means: No LAN connection, Hub doesn’t have an IP address

What to do: This is likely an ethernet connection issue. Make sure your ethernet cable is securely plugged into the back of the Hub and not loose. If the ethernet cable is snug but the blue light keeps blinking, the cable may be defective. Swap it for another shielded model. This may also be caused by strict network security settings preventing the Hub from connecting.

For a walkthrough of troubleshooting a blinking blue LED, watch this video:


Blue (solid)

What it means:

What to do: A solid blue light is expected during the normal setup process and when downloading firmware updates (in some cases). However, if the light remains solid blue for longer than 5 minutes, this indicates the Hub is unable to establish a connection with our servers. This problem can occur when outbound traffic from a local network is being blocked. Double-check your network settings and make sure the following ports are open during initial setup: 11111, 9443, 443, 39500, and 37


Magenta (blinking)

What it means: Downloading firmware update

What to do: This blinking pinkish colour indicates that the Hub is downloading a firmware update, which can occur during initial setup or with the release of a Hub firmware upgrade. Do not unplug the Hub while firmware is being downloaded.


Magenta (solid)

What it means: Applying firmware update

What to do: Expect to see this pinkish colour during initial setup or whenever the Hub’s firmware is upgraded. Do not unplug the Hub when firmware is being applied.


Green (blinking)

What it means: Hub is looking for devices to connect with

What to do: This is perfectly normal and expected. The LED will blink green when you start connection of a new device through the app, and it will stop when the device is connected or when you navigate away from the connection screen.


Green (double-blinking)

What it means: Z-Wave Exclusion Mode active

What to do: This is expected behaviour when you remove a Z-Wave device or activate General Device Exclusion through Z-Wave Utilities. Nothing wrong here!


Green (solid)

What it means: Hub connected to LAN and cloud

What to do: The Hub is successfully connected and ready to go! Hello, smart home! When you see this during initial setup, the app will also give you the go-ahead to connect devices to the Hub.

The LED may also be solid green when the Hub is downloading firmware updates.

If the LED is a solid green but the Hub is inactive, restart the mobile app. If this doesn’t fix the problem, contact our support team.



Red (blinking)

What it means: Hub is having power issues

What to do: The blinking red LED can indicate issues with either the backup batteries or the power cable connection. To narrow down the issue:

  • Take the batteries out of the Hub
  • Plug the Hub into a different wall outlet without batteries
  • Unplug the Hub and install new batteries
  • Plug the Hub into a different wall outlet with new batteries

If the LED is still blinking red in all four of the above scenarios, contact us at


General Troubleshooting

  • If you are having difficulties with your Hub or devices, reboot the Hub. A simple reboot will often clear up connectivity issues. The Samsung SmartThings Hub can be rebooted by pressing the recessed red button on the back of the Hub once. Wait 5-10 minutes for the LED to turn solid green; this will indicate the Hub is back online.
  • If the LED is blinking blue or stuck on solid blue, reboot your router.
  • If you have questions about your network security settings, firewall settings, or ports, contact your network administrator.