No matter what device you use, it has to be connected to the Internet, which we call the InternetThe Internet is a wonderful thing. Connecting a device to the Internet can have many benefits. We have already realized its benefits through cell phones, tablets, computers and other devices. If we connect other devices to the Internet, we will realize even more unexpected benefits. The other devices I'm referring to here are devices.

The Internet of Things is a simple concept: connect all devices to the Internet, and the Internet of Things confuses everyone not because it's too narrow a conceptual platform, but too broad. Even if there are many application examples, from ****sharing bike to ****sharing car, from smart manhole cover to smart street light, from smart parking to self-driving, you can hardly have a clear concept in your mind, all of which are related to the principle of IoT technology The principle of IoT technology is actually based on the Internet of Things (IoT), which utilizes RFID and wireless data communication technology to build a "network of things" connecting everything. Everything is connected to the "Internet of Things". In this network, all connected objects can "communicate" with each other and pass information to each other. IoT has three key technologies: sensor technology, transmission technology and cloud computing. It represents the entire process of collecting, transmitting, calculating (thinking) and feeding back information from IoT devices.

Currently, sensor technology and cloud computing technology have been more developed to meet people's needs, but transmission technology limits the wide application of the Internet of Things, the current Internet of Things are: low-power short-range: ble or ZigBee low-power long-range: dda iot, nb-iot, lora-iot or 2G big data short distance: WiFi big data long distance: 4G (it is worth mentioning that dda-iot is the first Chinese Internet of Things technology with independent intellectual property rights, and its technical indicators and parameter performance has far exceeded the Chinese international level, autonomy, controllability and localization, which may become the security of the country in the future intelligent era.) In terms of network layout, the remote network directly accesses the base station and does not need to set up its own network nodes. In short-range networks, a network node is required. The terminal data is first transmitted to the node, and then the node is connected to the Internet. The price of remote transmission is higher than that of short-distance transmission, and the power consumption is also higher.

Reasonable use of long-distance matching can effectively reduce the cost of IoT terminals, such as the original *** enjoy bike using 2G network unlocking, need to maintain a long data connection or use the downlink SMS unlocking, high power consumption, high cost; now *** enjoy bike directly using cell phone bluetooth unlocking, saving the data flow, reducing power consumption, improve the Unlocking speed, so IoT is very simple: IoT = Internet of Things, IoT = sensors built-in things, IoT = IoT clients and IoT.