ZigBee system development of Internet of things I (Introduction to ZigBee) [easy to understand]

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zigbee brief introduction ：

The wireless communication technology of wireless sensor network can adopt zigbee, bluetooth ,wifi And infrared, etc .

ZigBee Technology is a short distance , Low complexity , low power consumption , Low cost , Low data rate bidirectional wireless communication technology , It's a group based on IEEE802.15.4 Wireless standards are developed for networking , Communication technology in security and application software .

zigbee Range of application ：

Smart home - Control of household appliances and management of home entertainment system .

Building automation - Integrate and centrally manage lighting , heating , Refrigeration and safety and collection of the surrounding environment .

industrial automation - Use sensors to collect, analyze and process data in industrial production process , Improve the safety of industrial production .

In the field of Medicine - With the help of various sensors and ZigBee The Internet , Accurate and real-time detection of each patient's blood pressure 、 Information such as body temperature and heart rate .

zigbee Protocol architecture ：

When we study the network, we know that the software architecture of the network is designed according to the idea of layering , Each layer is responsible for different functions , For example, there are OSI Protocol reference model and TCP/IP Protocol model .

zigbee The agreement is also in OSI Reference model , Combined with the characteristics of wireless network , Using the idea of layering .

zigbee The standard divides network nodes into coordinators according to their functions (Coordinator), Router (Router) And terminal equipment (EndDevice).

The coordinator ：

Assign a unique network address to each device .

Choose a unique one for the whole network 16 Bit PAN ID( Domain identifier ), Through this ID, Devices in the network can communicate with each other through network addresses .

initialization , End , Forward messages from the network .

Router ： Allow devices to join the network , Expand the physical scope of network coverage and the function of packet routing .

Terminal equipment ： Mainly responsible for wireless network data collection .

fs_zigbee Introduction to Development Suite ：

zigbee Alliance from 2004 Since, several versions of zigbee Protocol specification , among zigbee2007 The agreement is relatively mature , It is also widely used .

be based on zigbee2007 Wireless network development , Need corresponding hardware and software support . In terms of hardware , With TI company-launched CC2530 System on chip is a representative ; Software aspect , And CC2530 The corresponding is TI To launch the Z-stack Protocol stack .

Fs_ZigBee The development board uses TI CC2530 chip ,CC2530 SoC Integrated RF Transceiver 、 Enhanced standard 8051 Microprocessor core .

The coordinator ： The device can be used as a coordinator to build a network （ It can also be configured as a routing device ), No lithium battery , need USB Separate power supply .

ZigBee terminal ： The kit contains three different terminal devices , They are temperature and humidity acquisition terminals 、 Light intensity terminal 、 Fan terminal , The function of data acquisition or remote control can be realized in conjunction with the controlled experiment ; Each module is equipped with lithium batteries , Can be used alone ; When the lithium battery is low , It can be done by USB Charge .

Each device is equipped with a power switch 、 Reset button 、USB Interface 、 Simulation and download port .

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