If the night vision doesn't work on the Xiaomi Smart Camera C500, please refer to the following information:
1. Night vision can not activate if the camera lens or IR sensor is dirty or blocked. Check the lens and remove any dust, dirt, or objects covering it.
2. Night vision can be affected by strong light sources in front of the camera, which can prevent IR lights from working properly. Adjust the camera angle or remove bright light sources from its field of view.
3. The camera settings may not have night vision enabled. Open the Xiaomi Home App and ensure night vision is turned on in the camera settings.
4. Firmware or software issues can affect night vision performance. Restart the camera and update its firmware to the latest version.
5. If night vision still does not work after performing the above steps, please contact after-sales service for further assistance.