Home appliance, communication system and communication method of home appliance

Abstract

The invention discloses a home appliance, a communication system and a communication method of the home appliance. The communication system comprises slave modules, a main module and a communication bus module, wherein the slave modules fall into at least one first slave module and a second slave module corresponding to each first slave module according to priorities, the first slave module has afirst communication interface and a third communication interface, the second slave module has a fourth communication interface, the main module has a second communication interface, each first communication interface is connected with the second communication interface through a first communication unit, each third interface is connected with a corresponding fourth communication interface througha second communication unit, the slave module being powered configures a corresponding sending end to a high impedance state, the first slave module analyzes an inquiry instruction sent by the main module successfully, then configures a corresponding sending end to a sending mode, and generates and sends response data to the main module, therefore, when the slave module sends response data, a loop current is not generated, and the main module can receive data normally.

Description

technical field [0001] The present invention relates to the technical field of household appliances, in particular to a communication system of a household appliance, a household appliance and a communication method of the household appliance. Background technique [0002] UART (Universal Asynchronous Receiver / Transmitter, Universal Asynchronous Receiver Transmitter) communication is gradually widely used in control, short-distance interaction and other usage scenarios due to its low physical layer cost, high communication rate and relatively complete verification mechanism. UART communication is usually only used for point-to-point communication. When a system requires information interaction between multiple devices, it needs to convert the information into bus information through a bus transceiver, such as 485, CAN, etc., or through a host with multiple UART resources. unit, each connected point-to-point to multiple slave units. However, there is a problem that the use o...

AI Technical Summary

Problems solved by technology

However, the problem is that the use of bus transceivers or the use of multiple UART resources in the master unit will cause an increase in production costs

[0003] In order to solve the problem of rising production costs, a related technology proposes a communication system with a single master and multiple slaves. However, the existing problem is that when two or more slaves send messages at the same time, the master cannot receive messages normally, or, When the data sent between the slaves is different, for example, when one end sends a logic high level and the other end sends a logic low level, it is easy to cause a loop current between the slaves, and it also causes the master to fail to receive messages normally.

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