Reset sylvana motion and temperature zigbee
Remove the device from your smart home set up. Remove the battery from your motion sensor, and leave it out for at least 6 seconds. Locate the gray button on the left hand side of the sensor. Hold down this button while simultaneously re-inserting the battery. Continue holding down the button for an additional 3 seconds until the light starts flashing blue, indicating that it has been reset and is in pairing mode. Extracted from: https://www.smartplusforum.community/t/resetting-your-smart-motion-and-temperature-sensor/47 => You can watch a video too.