Due to the rise of smart homes, many people now have more or less smart homes in their homes. Whether it is speakers, fans or socket switches, every device in the home appliances can become smart. change.CAN2.0 Communication Module With so many devices working in the same environment, the production standards of each manufacturer are different, and we rarely buy all the devices from one manufacturer. If we only buy a single zigbee device, it will be unusable. Happened, so how do we buy intelligent hardware devices of what protocol? the

Today we will discuss that there are currently three communication protocols most suitable for smart homes, Zigbee, WIFI and BLE (Bluetooth). And when you choose a smart home, how should you choose a suitable hardware protocol. Smart home communication protocol-Zigbee The zigbee protocol is also called the Zifeng protocol. The source of the name is the unique "communication means" of a bee. After a bee (Bee) discovers a new flower bush finger, it will pass a special way - "eight character dance" (zig) to convey the location of the flower bush to its peers, which means that the zigzag dance is a small communication among bees. network. the

In view of the significance of ZigZag to bees, Zigbee has become the name of a new generation of wireless communication technology. , In view of the meaning of zigzag for bees, zigbee has become the name of the new generation of wireless communication. Zigbee as a short distance. The biggest advantage of the low-power wireless communication protocol is that it can automatically form a device network and connect each device directly through the network. However, this ad hoc network requires a central node to manage the entire zigbee network, which means There must be a component similar to a "router" in the zigbee device network to connect each device together to realize the linkage effect between zigbee devices. the

And this additional "router" component is what we call a gateway. the

In addition, the access limit of Zigbee modules is also very high. In theory, the number of Zigbee network nodes can reach up to 65,000! In addition to the advantages, Zigbee technology has many disadvantages. For users, the installation threshold of Zigbee still exists, because most Zigbee devices do not have their own gateways, so a single Zigbee device basically cannot be used by our mobile phones. For direct control, a gateway is required as the connection hub between the device and the mobile phone. the

Smart home communication protocol-Wifi protocol

I believe that everyone is very familiar with WiFi. After all, the built-in network protocols in everyone's mobile phones are adapted to WiFi. the

Compared with Zigbee, the advantage of WiFi is that it is faster, transmits a large amount of data, and the user's first experience is very good. Smart devices with WiFi can be easily connected to mobile phones. Zigbee devices do not need a gateway to connect to mobile phones like Zigbee devices. the

The advantage of Wi-Fi is that it is relatively fast, can directly access the Internet without a bridge, and can seamlessly communicate with mobile phones on the Internet.

The main disadvantage of WiFi is power consumption. Generally, the standby power consumption of WiFi devices is about 1W, while the general standby power consumption of BLE devices and Zigbee devices is within 0.1W. In comparison, the power consumption of WiFi devices Much higher. the

In addition, the number of connected WiFi smart devices is also a relatively large problem. In theory, the upper limit of the number of WiFi connected is mainly determined by the number of nodes in the router. the

As far as the current home router is concerned, if there are more than dozens of electronic devices that need to be connected to the router, the router will basically not be able to bear it, and it will not even be able to connect to WiFi. Smart home communication protocol-BLE Bluetooth protocol BLE (Bluetooth Low Energy Technology) is equivalent to the middleman between WiFi and Zigbee. It not only has Zigbee's low power consumption (lower power consumption than WiFi), fast response characteristics, but also The advantage of easy use of WiFi (you can connect to the mobile phone network without a gateway), especially in the use of mobile phones, the current Bluetooth protocol, like WiFi, has become a standard protocol in smart phones. the

The biggest disadvantage of BLE Bluetooth technology is that the ability to penetrate walls is weak, and the signal serial rs232 to wifi converter is very weak behind the partition wall. Unable to link. the

How to buy smart home devices according to the communication protocol? the

At present, for smart home manufacturers, the principles of smart device selection protocols are generally:

1) Plugged-in devices, using the WiFi protocol;

2) Those who need to interact with the mobile phone, use the BLE protocol;

3) Zigbee module for sensor. However, due to various reasons, when manufacturers update their equipment, equipment with different protocols are sold at the same time. Therefore, when purchasing smart home equipment, you must pay attention to the following points:

1. When purchasing a "Zigbee version" device, you must ensure that you have a Zigbee gateway at home, otherwise most single Zigbee devices cannot be directly controlled by a mobile phone. 2. WiFi module and BLE Bluetooth module devices, most of the WiFi module and BLE Bluetooth module devices can directly connect to the mobile phone network without a gateway, unlike Zigbee version devices, which must have a gateway to connect to the mobile phone. You can choose WiFi module and BLE Bluetooth module device at will. the

3. BLE Bluetooth module devices generally interact with mobile phones at close range, and the signal behind the partition wall is not very good, so it is not recommended to purchase "only" BLE protocol for devices that require remote control. 4. If the home router is just an ordinary home router, it is not recommended to use a large number of wifi protocols in smart home devices, because it is very likely that the devices will often go offline. (Because the access nodes of ordinary wifi routers are limited, and how to access too many wifi devices will also affect the normal wifi connection.)