1: Make sure the WI-FI router is working properly and the WI-FI is 2.4GHz network.
2: If 2.4G is not supported, please use one cell phone to release the hotspot, use another cell phone to connect to the hotspot and then connect to the machine to check if the WIFI connection is successful.
3: Whether it is wifi or hotspot, keep the robot within 10 meters away from your phone.
4: If you can't solve it, please upload APP log.