- A communication method for communicating between communicating elements (6, 8, 10, 22, 24) forming part of a home automation system for a building, with each communicating element being connected in a communication network that supports communication according to a predefined communication protocol, each communicating element of the communication network memorizing a current network address in a memory storage of the communicating element, the current network address being used for point-to-point addressing in the said communication network, and characterized in that each communicating element implements the memorizing of at least one previous network address (50 1,..., 50 P) of the said communicating element, in the said memory storage of the communicating element, a previous network address being a network address used during a precedent connection to the communication network, the method further comprising the following steps that are operationally implemented by one first communicating element: updating the current network address, comprising receiving network identifiers, forming the current network address from the network identifiers received and memorizing said current network address, and, said first communicating element having at least one previous network address in memory, implementing an announcement of change of network address by transmission of an announcement message (Mess1) comprising at least the current network address and at least one previous network address of said first communicating element, the method further comprising the following steps implemented by a second communicating element (E2, E3,R): upon reception of said announcement message by said at least one second communicating element, updating (74, 74'), by said at least one second communicating element (E2, E3, R), consisting in memorizing said current network address of the first communicating element of the announcement message as a replacement of a previous address of the first communicating element. each communicating element of the communication network memorizing a current network address in a memory storage of the communicating element, the current network address being used for point-to-point addressing in the said communication network, and characterized in that each communicating element implements the memorizing of at least one previous network address (50 1,..., 50 P) of the said communicating element, in the said memory storage of the communicating element, a previous network address being a network address used during a precedent connection to the communication network, the method further comprising the following steps that are operationally implemented by one first communicating element: updating the current network address, comprising receiving network identifiers, forming the current network address from the network identifiers received and memorizing said current network address, and, said first communicating element having at least one previous network address in memory, implementing an announcement of change of network address by transmission of an announcement message (Mess1) comprising at least the current network address and at least one previous network address of said first communicating element, the method further comprising the following steps implemented by a second communicating element (E2, E3,R): upon reception of said announcement message by said at least one second communicating element, updating (74, 74'), by said at least one second communicating element (E2, E3, R), consisting in memorizing said current network address of the first communicating element of the announcement message as a replacement of a previous address of the first communicating element.