Three major smart home technologies and their advantages analysis

What are the three major technologies of smart home? Before analyzing the technical principles of AMS, we first analyze other control systems and make a comparison with LonWorks. Typical LonWorks logical structure. The nodes are divided into two categories, the Listener and the Announcer, where a is the speaker, b is the listener, and c and d are both the listener and the speaker.

LonWorks' address encoding is more complicated, with physical address (Neuron_ID), logical address (Domain, Subnet, Group), active address (Source), and destination address (DesTInaTIon). Let us assume that a is a button and b is an Actuator. When a is pressed, b acts. According to the LonTalk protocol, a will send a data packet containing the address of b and a predefined instruction so that b can perform the specified operation. In this example, a is the speaker, is the active party; b is the listener, is the passive party, b can only act according to the instruction of a, if you want b to perform different operations, a must issue different instructions. Similarly, if a wants to control more nodes, in principle, more instructions are issued to implement different operations on different objects (listeners). In a word, system function programming is done for a.

1, AMS system structure logic diagram AMS structure is relatively simple.

For convenience of description, the node is also divided into listener (L) and speaker (A), but since the system does not define the target address, the data is sent to each node, and the AMS system is logically a whole. Since there is no grouping, the system does not need a logical address set by the user, and the identity of the node is mainly distinguished and identified by the factory preset code (Node_ID). Suppose a is a button (speaker), b, c, and d are execution components (listeners). When the button is pressed, a will send a packet with its own identity code, b, c, d, and other networks. The node will receive the packet at the same time and perform different actions synchronously.

A data packet is to have multiple nodes perform multiple actions. The usual practice is to specify the address of all controlled nodes and the operations to be performed in the data packet. If this is the case, AMS will lose its uniqueness. In fact, in the AMS system, the data sent by a is fixed. It is not a real instruction. It represents the occurrence of an event (such as a button being pressed). As for the event, what will happen to the system? The reaction is not a matter to be considered. The responsibility of a is to transfer the event to the bus in the form of unique (ie unique) data, and then notify the node on the bus via the bus.

2, X-10

The X-10 is an internationally versatile smart home power carrier protocol (a communication "language"). With this "language" compatible product, you can talk to each other through the power line, no wiring, and easy installation. Insert the transmitter controller into the socket of a room, press the button to send out the control signal (on, off, dim, brighten, etc.), the signal propagates through the original wire, and the receiving switch of the other room can receive the command and The corresponding action. Pressing the button on the transmitter, the signal will be transmitted throughout the room 220V power line, as long as the X10 receiver is on the 220V power line, she will "hear" the command. You can set up 256 addresses using a simple dial. If you want both products to be turned on or off at the same time, you can set them to the same address. All X-10 compatible products can be freely combined. The products of S-10 and X-10, LeviTIon, Stanley, IBM, ACT, Homepro and other companies can be freely combined with each other.

The X10 and its compatible products are used by more than 10 million homes in the United States alone. Because it has many advantages over other forms of remote control products and systems.

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