Zigbee is the wireless network standard used by many smart home devices, but Zigbee is not the only technology of Yi. Today, Xiaobian will share another smart home wireless technology Z-Wave.
What is Z-Wave?
Developed in 2001 by the Danish company Zensys, Z-Wave is a wireless network protocol primarily used for home automation. Z-Wave was acquired by Sigma Designs in 2009 and sold the technology to Silicon Labs for $240 million in early 2018.
Since the technology is owned by a single company, the Z-Wave standard is still a standard, and each Z-Wave device can work with other devices. This is slightly different from Zigbee. Zigbee is divided into several different protocols. Devices of one protocol are not always able to communicate with devices of another protocol.
However, devices using the new Zigbee 3.0 standard can communicate with all Zigbee products, which is expected to mean that this shortcoming is no longer an issue in the future.
Z-Wave Alliance
With more than 700 members and more than 2,100 certified products, the Z-Wave Alliance has grown from 1,700 in 2017, compared to only six in 2005. A total of more than 94 million Z-Wave devices are in operation, accounting for 70% of the domestic market (US).
The Z-Wave operating frequency range is 800-900MHz. This is similar to Zigbee, but unlike the standard, Z-Wave does not operate like Wi-Fi at 2.4 GHz, causing interference. Therefore, by avoiding this frequency, Z-Wave can avoid any interference from nearby Wi-Fi devices.
Like Zigbee, Z-Wave uses far less power than other wireless technologies, including Wi-Fi and Bluetooth, which means devices need to be replaced infrequently. In some cases, it only needs to be replaced every 10 years. However, Z-Wave is only used to transmit small amounts of data, such as instructions and information from devices such as motion sensors. It doesn't have the huge bandwidth of Wi-Fi, but when the Z-Wave switch requires the smart light bulb to turn on, the data transmitted is very small and does not require that much bandwidth at all.
Mesh network
Like Zigbee (unlike most traditional Wi-Fi networks), Z-Wave also uses a mesh network so that every device on the network can communicate with other devices, which means that if one device fails, or exceeds intelligence The scope of the home control center, then the information will still be passed to the target device.
Unlike Wi-Fi, data is sent directly from your router to your device (such as a smart shou machine or computer), and Z-Wave's mesh network sends data from the gateway to one device and then to another device, so No device will leave the network coverage. Each Z-Wave product plugged into a wall outlet (excluding products with a battery) can be used as a repeater to transfer every message sent over the network to every Z-Wave device in the home. Z-Wave can travel about 300 feet in an open environment, but in reality the signal only needs to be transmitted over a short distance between one device and the next.
A single Z-Wave network can connect up to 232 devices (or nodes). This is far less than the 65,000 nodes that can make up a single Zigbee network, but for most smart homes, 232 should still be enough. These nodes include every smart light bulb in the home, as well as each switch, dimmer, motion sensor, smart doorbell, door lock, thermostat, smart plug, flood monitor and alarm.
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