Data Communication Device and Method of Home Automation System

摘要

1. TECHNICAL FIELD OF THE INVENTION;Home automation systems;2. The technical problem to be solved by the invention;In the home automation system adopting the conventional RS-485 communication method, if the data communication part of either the master or the slave is bad, it is to solve the problem that the communication of the whole system is impossible.;3. Summary of Solution to Invention;Terminal (R) (D) for receiving and transmitting data, and terminal for controlling transmission and reception of data And a line-connected terminal (A) (B) and a terminal (V _CC ) (G) connected to a power supply and a ground, and connected in parallel to each other to perform data communication between the master (1) and the slave (2). First and second data communication units (11) (12); First and third switches (13) (15) connected to the data receiving terminals (R) of the first and second data communication units (11) (12), respectively, to control the reception of data; Connected to line connection terminals A and B of the first and second data communication units 11 and 12, respectively, to control a connection between the first and second data communication units 11 and 12 and a bus line. Second and fourth switches 14 and 16; The light emitting diodes 17 may be connected to the first and third switches 13 and 15 and ports to display the states of the first and second data communication units 11 and 12.;4. Important uses of the invention;It is applied to the system (home automation system) adopting RS-485 communication method.