WiFi technology:
The advantages of WiFi solutions are that the technology is mature, separate products can access the public network, and the cost is relatively low.
The disadvantage is that WiFi devices generally consume more power, in the field of Internet of Things, power supply is a problem;
The number of WiFi access is relatively limited, a home router can only access dozens of devices in general;
Of course, WiFi solutions in the primary stage of the Internet of Things has a greater advantage, a separate WiFi module relying on the router to enter the network, the advantage is Obviously, although the number of access is not much, but in the case of the Internet of Things, smart home is not massively popular, can also meet most of the needs.
So the WiFi solution based on IoT UART serial WiFi module WG219/WG229/WG231/LCS6260 is more suitable for IoT products that do not require significant power consumption and will not be deployed in large quantities, e.g., smart rice cookers, smart air conditioners, refrigerators, washing machines, and other traditional home appliances to access the Internet of Things.
Bluetooth technology:
The main advantage of the Bluetooth solution is the ultra-low power consumption of the Bluetooth module, and it is relatively simple to open the Bluetooth and cell phone interaction through the app.
SKB369/SKB501
Currently, with the Bluetooth 5.0 module SKB501 (web link), and more Bluetooth 5.0 products on the market, the Bluetooth technology data transmission speed and coverage, etc. have been greatly improved, and are more suitable for the requirements of the Internet of Things.
So, the Bluetooth solution is suitable for IoT products that require power consumption and can interact directly with cell phones, such as smart door locks, smart scales, smart electric toothbrushes, etc., as well as for large-scale deployment of Bluetooth mesh light control and Bluetooth sensor networks.
UWB technology:
Ultrawideband technology is a new, emerging in recent years, and the traditional communications technology is very different from the communications wireless technology. It does not need to use the carrier wave in the traditional communication system, but through the transmission and reception of very narrow pulse with nanoseconds or microseconds to transmit data, so that it has a bandwidth of the order of 3.1 ~ 10.6GHz. Currently, countries including the United States, Japan, and Canada are researching this technology, which has good prospects in the field of wireless indoor positioning.
UWB technology is a wireless technology with high transmission rate, low transmit power, high penetration capability and is based on very narrow pulse without carrier. It is these advantages that have led to more accurate results in the field of indoor localization.
Ultra-wideband indoor positioning technology often uses TDOA demonstration ranging positioning algorithms, that is, through the time difference between the arrival of the signal, through the hyperbolic intersection to locate the ultra-wideband system includes generating, transmitting, receiving, processing of very narrow pulse signal radio system. In contrast, the ultra-wideband indoor positioning system includes UWB receivers, UWB reference tags, and active UWB tags. During the positioning process, the UWB receiver receives the UWB signals emitted by the tags, and by filtering the various noise interferences mixed in the electromagnetic wave transmission process, the signals containing valid information are obtained, and then analyzed by the central processing unit for ranging and positioning calculations.
Ultrawideband can be used for indoor precise positioning, such as position discovery of battlefield soldiers and robot motion tracking. Compared with the traditional narrowband system, the ultra-wideband system has the advantages of strong penetration, low power consumption, good anti-interference effect, high security, low system complexity, and can provide precise positioning accuracy. Therefore, ultra-wideband technology can be applied to indoor positioning tracking and navigation of stationary or moving objects as well as people, and can provide very precise positioning accuracy. Depending on the technical means or algorithms used by different companies, the accuracy can be maintained at 0.1 m~0.5 m.