SmartThings Support

OSO Technologies PlantLink Soil Moisture Sensor

OSO Technologies PlantLink Soil Moisture Sensor is a soil health sensor that makes watering simple and efficient. By combining PlantLink’s Soil Moisture Sensors (“Links”) with the SmartThings app, PlantLink lets you know when your plants need water. Simply place Links in soil indoors or outdoors, and the system will calibrate to the plant's watering needs using PlantLink’s catalog of over 50,000 plants. Never worry about over- or under-watering again!

Note: The OSO Technologies PlantLink Soil Moisture Sensor is compatible with the SmartThings Classic app.



To connect PlantLink Soil Moisture Sensors with SmartThings

The following steps show you how to connect your Links to your SmartThings Hub. If you connect them this way, you will not need a PlantLink Basestation. If you already have PlantLink Sensors paired with a PlantLink Basestation on your myPlantLink account, PlantLink Sensors paired with SmartThings on the same myPlantLink account will appear alongside any plants that have been linked to your Basestation.

After installing your Link(s), you can view your plants through the SmartThings app, the myPlantLink app, or the myPlantLink website.


1. Create a myPlantLink account

Visit or download the PlantLink iOS app to create your myPlantLink account.


2. Power your PlantLink Soil Moisture Sensor

Remove the Link’s cap and install the batteries (2 AAAA batteries). Make sure they are oriented correctly.


3. Connect the Link with the SmartThings Hub via the SmartThings Classic app

In the SmartThings Classic app:

  1. Tap My Home
  2. Under Things, tap Add a Thing at the bottom of your Things list
  3. The app will say Looking for devices…
  4. While the Hub searches, remove the Link’s cap and press the small black button on the side of the circuit board opposite the batteries
    • If the device is not connecting, try again starting over from Step 1. immediately above (Tap My Home...)
  5. When the device is discovered, it will be listed at the top of the screen
  6. Tap the device to rename it. The default name is “PlantLink”—you may want to give your plant a nickname instead, like “Kitchen Basil.’ Tap Done
  7. When finished, tap Save
  8. Tap Ok to confirm


4. Send data about the connected Link to myPlantLink

In the SmartThings mobile app:

  1. Tap Marketplace
  2. Tap SmartApps
  3. Tap More
  4. Tap PlantLink Connector
  5. Tap Install
  6. Log in with your myPlantLink credentials (email and password)


5. Calibrate and monitor your plants

Note: Link sensors may take up to 24 hours to calibrate. Wait a full day for the PlantLink system to calibrate accurately.

The SmartThings Classic app will show that the plants are “calibrating.” After plants are calibrated, you can view their watering status. You can access your Links at any time in the SmartThings app:

  1. Tap My Home
  2. Tap Things
  3. Select your Link(s)

To adjust PlantLink notifications or change your plant settings, visit your online dashboard at


To remove PlantLink Soil Moisture Sensors from SmartThings

If your Link is not performing optimally with SmartThings, you may need to remove and reconnect the device.

To remove the device from the SmartThings Classic app:

  1. Tap My Home
  2. Tap Things
  3. Select the Link
  4. Tap the gear icon
  5. Tap Remove
  6. Confirm removal (this cannot be undone)


To reset PlantLink Soil Moisture Sensors

Performance issues may also be resolved by resetting the Link device.

To reset a Link:

  1. Remove the Link’s cap
  2. Press and hold the small black button on the Link for 10 seconds