1. Single press the reset button of the sensor, the hub will prompt with the voice message "normal link confirmed" which means the connection between the sensor and the hub is normal. If the hub gives no response, please move the sensor closer to the hub and try again. If the hub remains silent, the sensor might have been removed from the hub or run out of power. Please follow the instructions to add the sensor or replace the battery.
2. Please split the sensor and the magnet and then move them back together, then check the log of the Aqara Door and Window Sensor in the app. The sensor is working properly if the corresponding event has been updated in the log.