Language is the most important communication tool for human beings and the main expression for people to communicate. In the age of the Internet of Things, when machines need to communicate, they also need to be in a language that they can understand each other. Today, we will take a look at the wireless short-range communication languages ​​and technologies that are commonly used in the Internet of Things--Huawei Hilink protocol, WiFi (IEEE 802.11 protocol), Mesh, Bluetooth, ZigBee, Thread, Z-Wave, NFC, UWB, LiFi.
1. Huawei Hilink Agreement
In December last year, Huawei launched a self-developed "three-piece" smart home "Hilink", Huawei-LiteOS system and IOT chip. At present, various Internet end-user interconnection agreements on the market have been arbitrarily contested, but they seem to be unfriendly and isolated from each other, and each is behind closed doors. The Hilink protocol is known as the "mandarin" between smart devices. It automatically discovers devices and connects them with one click, and is compatible with protocols such as ZigBee, WiFi and Bluetooth.
2.WiFi/IEEE 802.11 protocol
WiFi, full name Wireless-Fidelity, wireless fidelity, is a standard in wireless local area networks (WLAN). Since its launch in 1999, it has been one of the more popular ways to access the Internet in our lives. Usually WiFi technology uses 2.4GHz and 5GHz surrounding frequency bands, and a wired router can connect a wired router to a WiFi signal. The WiFi standard family also has 802.11a, 802.11b, 802.11g, and 802.11n.
In 2016, the WiFi Alliance's latest 802.11ah WiFi standard, WiFi HaLow, enables WiFi to be used in more places such as small-size, battery-powered wearable devices that are also suitable for deployment in industrial facilities, and between Between applications. HaLow uses the 900MHz band, which is lower than the 2.4GHz and 5GHz bands of current WiFi. Lower power consumption, while HaLow's coverage can reach 1 km, the signal is stronger, and it is not easy to be disturbed. These characteristics make WiFi more responsive to the development of the Internet of Things era.
Advantages: wide coverage and fast data transfer rate.
Disadvantages: poor transmission security, poor stability, slightly higher power consumption, and poor networking capabilities.
3.Mesh/IEEE 802.11s protocol
The wireless Mesh network, known as the cheap "Last Mile" broadband access solution, utilizes a multi-hop wireless mesh structure to provide broadband access to mobile users. Mesh is a combination of WLAN and mobile Ad Hoc (peer-to-peer) networks. Compared with the WLAN, each network terminal can communicate directly with each other, and no longer needs to be forwarded by the AP (base station), and the coverage is larger. Compared with Ad Hoc, due to the fixed and power-filled backbone router, there is no need to consider too much in terms of mobility and power consumption.
Advantages: The network deployment is fast, no complicated configuration is required; the network is stable, any node is broken, and the data transmission of other devices is not affected; the network coverage is large, and various broadband wireless access technologies (such as WLAN, WiMAX, UWB, 3G, etc.) can be used. Combined to form a larger multi-hop network structure.
Disadvantages: It has a certain delay, is not suitable for real-time monitoring applications, and has limited network capacity.
4. Bluetooth / IEEE 802.15.1 protocol
Bluetooth technology first began in 1994 and was developed by Swedish Ericsson. It uses Frequency-hopping Spread Spectrum and the communication band is 2.402GHz-2.480GHz. Up to now, nine versions have been updated, namely Bluetooth 1.0/1.1/1.2/2.0/2.1/3.0/4.0/4.1/4.2, and the communication radius extends from a few meters to several hundred meters.
When WeChat and Baidu cloud are still not popular, we are always used to open the Bluetooth device in the mobile phone and share the fun and good things on the mobile phone to the friends around us. Bluetooth technology is widely used in mobile devices such as mobile phones, PDAs, PCs, GPS devices, and a large number of wireless peripheral devices (Bluetooth headsets, Bluetooth keyboards, etc.).
Bluetooth technology is also closely following the development of the Internet of Things. The latest Bluetooth 4.2 data transfer rate of up to 1Mbps, more powerful privacy features, Ipv6 network support. In the smart home field, Bluetooth devices using the Bulltooth Smart technology can achieve "conversation" between devices and devices without a network connection. This can solve the problem that the smart home devices will continue to work if the network is suddenly disconnected without WiFi.
Advantages: fast speed, low power consumption and high security.
Disadvantages: There are few network nodes, which are not suitable for multi-point control.
Taillight Wire Harness apply in automotive,motocycle,bus,bike,truck.
Yacenter has experienced QC to check the products in each process, from developing samples to bulk, to make sure the best quality of goods. Timely communication with customers is so important during our cooperation.
If you can't find the exact product you need in the pictures,please don't go away.Just contact me freely or send your sample and drawing to us.We will reply you as soon as possible.
Tail Light Wiring Harness,Trailer Wiring Harness,Trailer Light Wiring Kit,Trailer Light Harness
Dongguan YAC Electric Co,. LTD. , https://www.yacentercn.com