Ten years ago or even five years ago, it was only a concept to be a smart home. Because sensors, processors, and storage are expensive and costly; there is no high-speed wireless network support, no cloud computing concept, users don't have a smartphone, and there is no mobile Internet. Google’s high price acquisition of Nest attracts attention, which also allows the industry to see the energy that smart homes are making. Smart home is not a new topic, why has it revived recently? Smart homes and the Internet of Things are all designed to meet people's daily needs. Whether it can be popular or not depends on the actual effect. In other words, whether smart homes provide a better experience than ordinary non-intelligent, and the increase in cost is within the scope of acceptance. Whether the Internet of Things has brought tangible efficiency improvements to the industry, and the benefits are higher than the cost. Smart homes and the Internet of Things have recently heated up because of recent advances in technology, which have further reduced the cost of software and hardware for smart homes and the Internet of Things, resulting in higher revenues, higher cost performance and practicality, and initial market competitiveness. Take the simplest face recognition access control as an example. Face recognition access control system, as early as 2004, there are intelligent home products display, but at that time the price of 1.3 million pixel camera was several tens of dollars, the recognition effect was also very poor, people want to put the face up, identify several feature points can. At that time, the embedded processor recognized by the user was also tens of dollars or even hundreds of dollars, and the recognition speed was very slow, and the recognition rate was also problematic. At that time, the intelligent access control recognition was poor, the price was very high, and there was a display but no market. In 2014, the 8 megapixel back-illuminated camera cost only $10, and there is no problem in accurately identifying a face from a meter. After 10 years of advancement, the processor has improved performance by dozens of times and the price is only a few dollars. In 2014, the intelligent access control system has the advantages of high recognition speed, high accuracy and low price, which is practical and competitive. Similarly, the core of the Internet of Things is GPS positioning chips and networking chips. A few years ago, both price and power consumption were problems, but now it is not a problem. Therefore, smart homes and the Internet of Things are not re-heating, but the demand has always existed. Recently, because technology has advanced to the threshold of practicality, smart homes and the Internet of Things are changing from concept to reality. Google also sees this high price. Acquisition of the pioneer company Nest. Nest's fist product is a thermostat featuring a large number of sensors that monitor the temperature, humidity, light, and environmental changes around the thermostat to determine if someone is moving in the room and decide whether to turn on the thermostat. It records user settings, daily routines and temperature preferences, uses algorithms to generate setup schemes, and supports networking for remote control. Nest's monitoring function comes from temperature sensor, humidity sensor, light sensor... These things have existed for a long time, but the cost is reduced. The large-scale popularization is the development of smart phones in recent years. The sensor is realized as a smart phone integrated into the chipset. Previously high-power temperature sensors cost $2, and now only consume one dollar of the previous temperature sensor. Previously, the single-axis acceleration sensor cost $5, and now the three-axis acceleration sensor only costs $1. Nest stores the processing of the collected information (determining whether someone is in the light sensor, storing the user's usage data, and using algorithm analysis), and requires a microprocessor and a memory. If a complex algorithm is involved, it will be uploaded to the server for calculation and then returned. Nest's local information storage processing uses ARM A8 processor, 512M memory and 2G flash memory. High-performance, low-power, low-cost microprocessors and memory are also the result of rapid advances in embedded processors in recent years. Previously, a low-frequency ARM 9 processor with a 10-fold weaker computing power was expensive. The upload server calculation returns a cloud computing application that has been popular in recent years, similar to Apple's Siri. Nest's support for remote control has benefited from the development of mobile communications and smartphones in recent years. Mobile communication provides 3G, 4G high-speed low-latency wireless networks, and smart phones provide terminal devices that can be controlled. Ten years ago or even five years ago, it was only a concept to be a smart home. Because sensors, processors, and storage are expensive and costly; without high-speed wireless network support, without the concept of cloud computing, complex computing cannot be handled; users do not have a smartphone, no mobile Internet, remote control cannot be achieved. Now, technological progress has reached the threshold of practicality. Nest's intelligent thermostat provides a better experience, and the cost is within the acceptance range. The market is welcome, representing the future trend, and Google is willing to acquire. This Automation curtain is specially designed for automation industry. 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