Home Isolation red team, how does the system know that my home isolation is over?

Home Isolation red team, the system knows that my home isolation is over: through the induction of the door seal. According to relevant information, the door seal is used to block the home address. The "electronic door opener" used in the door seal is based on the principle of magnetic induction, and the information is fed back to the remote server through the data interface by using the Internet of Things technology. When the door is opened, the background of the command center will immediately send a short message to the mobile phone of the designated staff, and the command center will display it in real time. When the family isolation is over, the system will also receive this message to know that the family isolation is over.