fix some bugs

Robotail is an APP of HomeRobot Limited, which needs to be used in conjunction with the Robotail smart cat litter machine. [Multi-cat identification] Through the difference in weight, cats of different weights can be distinguished, and up to 30 different cats can be identified. [Health data management] Monitor cats' weight and toileting time around the clock, periodic data push, combined with multi-cat identification, make the cat's toileting health data management more accurate, just open the APP, you can instantly understand the cat's toileting health situation. [Customized smart settings] Personalized settings can be made in the APP: automatic mode, do not disturb mode, timing mode, etc. This is a unique smart cat litter box that only belongs to you and the cat owner. The above are the functions that are bound to the high-end smart cat litter machine. If you are bound to the flagship model, you can enjoy the following new functions: [Remote operation visualization] The cat litter box can be remotely controlled for one-key cleaning, smoothing and sand changing. All cats and cat litter box status can be viewed on the app in real time. At the same time, the camera can be turned on at any time to understand the cat's toileting status in real time. This little hobby, as if coming to the scene in person, makes it easy and fun to shovel shit. [Intelligent Multi-Cat Recognition] Through weight difference and intelligent recognition, cats can be accurately distinguished, and up to 30 different cats can be recognized, making message push and data management more accurate. Robotail allow you to care for cats anytime, anywhere, enjoy the relaxed and happy life brought by technology, and let us spend more time with our hearts.