The architecture of the Internet of Things is mainly divided into three layers:
1. Perception layer (Sensors and Sensor networks),
2. Network layer (3G/4G/5G communication network),
3. Application layer (cloud services for various applications).
Perception layer Mainly discusses various wired or wireless sensors (such as temperature, humidity, brightness, gyroscope, three-axis accelerometer, heartbeat, blood pressure, pulse, etc.) and how to construct sensor networks to transmit the data collected by the sensors It is a very challenging task for sensors to achieve low power consumption (high battery life), low cost, small size, long wireless transmission distance, etc. The network layer mainly discusses how to use existing wireless or wired networks to Effectively transmit the collected data, such as using existing 3G/4G wireless transmission technology, or future 5G wireless transmission technology, etc. The application layer mainly explores how various application fields use the results of big data analysis to provide feedback and Control sensors or controller adjustments, etc. Overall, the Internet of Things is a living ecosystem. Sensors collect data and transmit it back to the cloud processing center through mobile phones or other device networks. After analysis, the control information is It is passed back to the controller for various fine or delicate controls.
[i=s]This post was last edited by fish001 on 2019-3-16 22:05[/i] No matter what program you port, the most important thing is, don’t think you must check the information first, spend a week looking fo
I wrote a program for timer 4 overflow interrupt. I referred to the development board routine and found that the timing was inaccurate. The program did not determine the timer overflow interrupt flag.
[color=#000][size=4] Antenna and feeder line maintenance is an important part of mobile communication network optimization. It has high technical requirements and is crucial to the smooth operation of
[i=s]This post was last edited by jameswangsynnex on 2015-3-3 19:58[/i]Statistics on the number of IPTV users in China 2006-7-13After the hustle and bustle of 2005, IPTV has smoothly transitioned to t
[i=s]This post was last edited by lcdi on 2020-7-6 11:53[/i]Project BackgroundAny feature can be used as an authentication factor , so vibration can certainly be used. This design will design an authe
【Abstract】 This paper studies the atmospheric breakdown of high-power microwave pulses using a wide range of parameters for the interaction between electrons and atmospheric neutral molecules ; define