Heyi induction cooker is a hardware controlled app, which needs to be used online with the hardware, and the software and hardware communicate through IM before. The hardware consists of upper computer and lower computer, which are controlled by L and R modules respectively. The difficulty of this app lies in the timeliness of communication, which is also a key point of user experience. Finally, it processes all kinds of communication messages by multi-threaded classification, and solves them by priority operation.