Bus-based control system, control method and storage medium

Abstract

The invention provides a bus-based control system. The control system comprises a sending bus and a receiving bus, master equipment connected to the transmission bus and the reception bus; and at least one sub-equipment connected in parallel to the transmission bus and the reception bus, wherein the main equipment receives a connection request message containing a protocol code and an equipment identifier from at least one piece of sub-equipment through a receiving bus; and a corresponding relationship between the equipment identifier and the protocol code is established, protocol informationcorresponding to the at least one piece of sub-equipment is determined according to the protocol code in the connection request message, and connection with the at least one piece of sub-equipment isestablished, through the sending bus and the receiving bus according to the protocol information corresponding to the at least one piece of sub-equipment and the equipment identifier. Correspondingly,the invention further provides a bus-based control method executed by the control equipment and a computer storage medium.

Description

technical field [0001] The present application relates to the field of smart home technology, in particular to a bus-based control system, control method and storage medium. Background technique [0002] At present, smart home has gone through the baptism of concept popularization stage for several years, and most consumers have heard of smart home more or less. Among them, the smart wall switch is an important part of the smart home. The smart switch can realize the intelligent lighting of the house. For example, the user can remotely control the switch on and off, switch timing and other operations through the application (APP). [0003] At present, most of the smart home products on the market, such as smart wall switches, are implemented using the RS485 bus. Among them, a single RS485 bus is usually composed of a twisted pair twisted by two metal wires A / B. The transmission data is in the form of differential, which is a half-duplex working mode, that is, only data can ...

AI Technical Summary

Problems solved by technology

Since the half-duplex RS485 bus determines that the host computer (also called the master device) can only receive data or send data at the same time, it cannot perform two operations of receiving data and sending data at the same time. Therefore, currently only Transmit messages of the same protocol, but cannot support the transmission of messages of multiple different protocols on the same RS485 bus

This is because the lengths of messages of different protocols are not exactly the same. After the host recognizes a message of a protocol, after protocol conversion, message analysis, and finally a series of processes of replying, the time occupied by the bus is not the same. Deterministic, therefore, many sub-devices on the bus do not know how long to wait before sending their own messages

If each sub-device does not handle the waiting time of the bus well, it will cause conflicts between the sub-device on the time of occupying the bus, resulting in a large number of packet loss and errors. This is a problem that is difficult to overcome for the current RS485 bus.

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