SmartThings Motion Not Detected — Detection Fix

Quick answer

Note: Samsung discontinued the standalone SmartThings Hub. SmartThings hub functionality is now built into select Samsung TVs and the SmartThings Station. The troubleshooting steps below apply to all SmartThings hub devices.

• Ensure the motion sensor is within range of your SmartThings hub.
• Check that the sensor's batteries are charged or replaced.
• Confirm that the sensor is not obstructed by furniture or walls.
• Restart the SmartThings app and your hub.

Symptoms

• Motion alerts are not received when motion occurs.
• The SmartThings app shows the sensor as offline.
• The sensor LED indicator does not light up when motion is detected.
• Automations linked to the motion sensor are not triggering.

Quick checks

1. Battery Status: Check if the motion sensor batteries need replacing.
2. Distance: Ensure the sensor is within the recommended distance from the hub.
3. Obstructions: Look for any objects blocking the sensor's view.
4. App Status: Verify that the SmartThings app is up to date.

Step-by-step fix

1. Check Battery:

   • Remove the sensor from its mount.
   • Replace old batteries with new ones.
   • Reattach the sensor and wait for it to power on.

2. Verify Connection:

   • Open the SmartThings app.
   • Navigate to the "Devices" section and find your motion sensor.
   • Check if it shows as online. If not, try to reconnect it.

3. Adjust Sensor Placement:

   • Ensure the sensor is mounted at the recommended height (usually 6-8 feet).
   • Clear any obstructions in front of the sensor.

4. Restart Devices:

   • Restart the SmartThings app on your smartphone.
   • Power cycle your SmartThings hub by unplugging it for 30 seconds and plugging it back in.

5. Test Sensor:

   • Walk in front of the sensor to see if it detects motion.
   • Check the app for any alerts or notifications.

If it still doesn't work

• Reset the Sensor: Refer to the manufacturer's instructions to reset the motion sensor to factory settings.
• Re-add the Sensor: Remove the sensor from the SmartThings app and add it back.
• Contact Support: If issues persist, reach out to SmartThings customer support for further assistance.

Thinking About Your Smart Home Hub?

SmartThings works best as part of a broader Samsung ecosystem. If you're evaluating hub options or voice assistants, our smart speaker buying guide covers the Echo lineup (which has a built-in Zigbee hub in the 4th gen) and Google Nest devices with Thread support — both worth considering as your smart home's backbone.

→ Expanding your sensor setup? See our smart sensor guide for motion, door, and temperature sensor comparisons.

FAQ

Q: Why is my motion sensor not detecting movement?
A: It could be due to low battery, obstructions, or connectivity issues with the SmartThings hub.

Q: How can I tell if my motion sensor is working?
A: Check the LED indicator on the sensor; it should light up when motion is detected.

Q: What should I do if my motion sensor keeps going offline?
A: Ensure it's within range of the hub and check for any interference from other devices.

Q: Can I use multiple motion sensors with SmartThings?
A: Yes, you can add multiple sensors to your SmartThings setup for enhanced coverage.

Q: How do I reset my SmartThings motion sensor?
A: Follow the specific reset instructions provided in the user manual for your motion sensor model.