Home appliance, communication system and communication method of home appliance

Abstract

The invention discloses a communication system and communication method of the home appliance, and the home appliance. The communication system comprises the followings: a slave module is divided intoat least one first slave module and a second slave module corresponding to each first slave module according to the priority, the first slave module is provided with a first communication interface and a third communication interface; the second slave module is provided with a fourth interface; a host module is provided with a second communication interface, each first communication interface iscorrespondingly connected with the second communication interface through the first communication unit; each third communication interface is connected with the corresponding fourth communication interface through the second communication unit; the slave module configures the corresponding sending end as the high impedance state when being powered on, the slave module configures the correspondingend as a sending mode after successfully analyzing a query instruction sent by a host module, and generates response data to send to the host module, thereby effectively avoiding the loop current caused by the situation that the slave module sends back the response data, and meanwhile, the host module can receive the data as normal.

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...

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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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