The technical battle of smart home: WiFi Rite ZigBee

At present, “wireless replacement of cable” has become an irreversible trend on a global scale, and this trend is more obvious in the field of home Internet of Things. It can be said that home automation, also known as "smart home", has become an arena for advanced wireless technology. Different companies have adopted different technical solutions, and the effects are very different. Here we highlight the four most popular wireless technologies in the smart home industry, namely WiFi, Z-Wave, ZigBee, and SmartRoom. Here we focus on the advantages and disadvantages of WiFi technology and ZigBee.

Let's talk about WiFi first. The advantage of this wireless technology is that the technology research and development threshold is low and the product cost is low. Usually, a college graduate completes the development of a WiFi item in about 30 days. Due to the difficulty in technology development, many start-ups develop smart home products based on WiFi, but their shortcomings are also very obvious.

1. The biggest problem with WiFi is that the security is very low, the wireless stability of the product is also poor, and the user experience is not good. Recently, foreign media reported that smart home products of companies such as Belkin in the United States were easily attacked by hackers. CCTV recently reported that American hackers have shown how to use the Snoopy unmanned remote control aircraft to easily obtain all the information of users who turn on WiFi-enabled mobile phones.

It's hard to imagine that if your neighbor can easily get all the information about your home, you can know if someone in your home, whether you sleep, or even what film you are watching. He knows everything, how can you sleep peacefully? The security of WiFi has become a lingering shadow in the smart home field.

2, the high power consumption of WiFi is also a big weakness, which also leads to its limited application in the smart home field. Due to its high power consumption, WiFi will not be used in products such as smart door locks, infrared forwarding controllers, and various sensors. Smart door locks are one of the indispensable products for smart homes, and temperature and humidity sensors and lighting. Sensors, smoke detectors and other sensors are an essential part of smart home systems.

3. The networking capability of WiFi is low, and the expansion space is limited. At present, the actual size of the WiFi network generally does not exceed 16 devices, and the number of switches, lights, and home appliances in the ordinary home has far exceeded 16. The number of devices that can be connected to the smart home system based on WiFi technology is very limited, and the future development Space is limited.

Compared to WiFi technology, the advantages of ZigBee technology are very obvious. ZigBee technology has accumulated a lot of valuable experience in the industrial field. As we all know, the requirements of the industrial field are usually much higher than the civilian field, and the ZigBee technology is born in the industrial environment with complex application environment and has been marketed for a long time in the world. test. Here are a few of the advantages of ZigBee technology:

1. High security. The security of ZigBee technology stems from its systematic design. So far, ZigBee technology has not cracked a precedent in the world, and wireless technologies such as WiFi, Bluetooth and Z-Wave have frequent security incidents. This shows its security position in the field of short-range wireless communication.

2, low power consumption

ZigBee technology uses a very low power design. In theory, a battery can be used for more than 10 years. In practical applications, a battery can be used for about 2 years. This low-power technology makes it widely used in smart home applications, including Intelligent door locks, infrared transponders, temperature and humidity, and other sensors are available in a variety of applications.

3, strong networking capabilities

In theory, a ZigBee gateway can connect more than 65,000 devices. In the current practical application, it can form a stable network of more than 100 devices. The network scale is far beyond the technologies of WiFi, Z-Wave, Bluetooth, etc., in the foreseeable In the future, it will be sufficient to meet the needs of future smart homes.

Of course, the shortcomings of ZigBee are also obvious. The main reason is that product development is difficult, the development cycle is long, and the product cost is high. It is difficult for general startups to bear the development risk. This is also the important ZigBee technology currently only available in a few companies around the world. the reason.

In summary, WiFi faces a very embarrassing problem in the smart home field. At present, more experts believe that WiFi can do some demonstration products like smart items, but it is a safe and reliable product for long-term use in the home. Obviously not very suitable. ZigBee technology has won the support of mainstream smart home manufacturers including Schneider, IOT, Philips, Control4, etc. with its remarkable technical advantages, which has swept the global trend.

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