If the Xiaomi Robot Vacuum H40 appears offline, please follow these troubleshooting steps:
1. Check that the robot vacuum is powered on. If it is turned off, it will show as offline;
2. Ensure the vacuum is placed within range of a strong and stable Wi-Fi signal. Avoid locations far from the router or behind thick walls;
3. Restart your Wi-Fi router to refresh the network connection. Sometimes router issues can cause device disconnections;
4. Reset the Wi-Fi settings on the robot vacuum and reconnect it through the latest version of the Mi Home/Xiaomi Home APP;
5. Verify that your smartphone is connected to the 2.4GHz Wi-Fi network (not 5GHz), as the vacuum only supports 2.4GHz networks;
6. If the issue persists, please contact after-sales services for further inspection.