The Internet of Things is mainly divided into 4 layers, namely: 1. Perception and identification layer, responsible for collecting and obtaining information for the Internet of Things; 2. Network construction layer, responsible for transmitting sensing information to the upper layer and transmitting commands to the lower layer; 3. The platform management service layer is responsible for effectively integrating and utilizing the information collected by the perception layer through big data, cloud computing and other technologies; 4. Comprehensive application layer.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
1. Definition of the Internet of Things:
The Internet of Things is an information carrier based on the Internet, traditional telecommunications networks, etc., which allows all devices that can be independently addressed to Ordinary physical objects form interconnected networks.
2. The composition of the Internet of Things:
The Internet of Things can be roughly divided into the following four levels, namely: perception layer, network layer, platform layer and application layer. The details are as follows:
(1), Perceptual recognition layer.
The perception layer is the foundation of the overall architecture of the Internet of Things and an important part of the integration of the physical world and the information world. At the perception layer, we can sense the object itself and the surrounding information through sensors, so that the object also has the ability to "speak and release information", such as sound sensors, pressure sensors, light intensity sensors, etc. The perception layer is responsible for collecting and obtaining information for the Internet of Things.
(2), Network construction layer.
The network layer plays a connecting role in the entire IoT architecture. It is responsible for transmitting sensing information to the upper layer and transmitting commands to the lower layer. The network layer transmits the information collected by the perception layer to the IoT cloud platform, and is also responsible for transmitting the instructions issued by the IoT cloud platform to the application layer, which serves as a link. The network layer mainly transmits massive information through the Internet of Things, the Internet, and mobile communication networks.
(3), Platform management service layer.
The platform layer is the core of the overall architecture of the Internet of Things. It mainly solves issues such as how to store, retrieve, and use data, as well as data security and privacy protection. The platform management layer is responsible for effectively integrating and utilizing the information collected by the perception layer through big data, cloud computing and other technologies, and providing scientific and effective guidance for people to apply it to specific fields.
(4), comprehensive application layer.
The Internet of Things will eventually be applied to various industries. After the information transmitted by objects is processed by the IoT Cloud Platform, the valuable information mined will be applied to real life and work, such as smart logistics. , smart medical care, food safety, smart parks, etc.
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