What is Z-Wave:
How it works:
Z-wave operates at 908.42 MHz in the US and 868.42 MHz in the Europe. UAE follows the Europe standards. i.e 868.42 MHz. Z wave works on " Mesh Networking Topology". A Z- wave network can contain up to 232 nodes.
In a Z-Wave network there is a main controller to control the whole Network which has a unique identification number or Network ID and each Z-Wave device is assigned a unique "Node ID", to distinguish it from other Z-Wave devices. So even if you have ten of the same type of light switches installed, each one will have its own node ID. In Z-Wave every node is not just a node but repeater also.
Controllers can send and receive Z-Wave commands. Z-Wave is a "Mesh Network" - that is, all devices can communicate with other devices. There is a hierarchy for some types of functions such as adding or removing nodes from the network, optimizing the network, etc. and those functions must be done by the Primary Controller.
This Primary Controller is master controller in the network and there will be only one in each Z-Wave Network. Primary Controller will have capability to include and exclude the nodes in the network. Hence Primary Controller always keeps latest topology of the network. Primary controller also takes care of managing allocation of node IDs.
The controllers which are added to the Z-Wave network using the Primary Controller are known as "Secondary Controllers. They do not have capability to Include or Exclude any nodes. They will get copies of the hierarchy from Primary Controller.
|Secondary Controller||Z-Wave Main Controller|
As mentioned before, nodes are added or removed from the network using the primary controller. When a node is added, it must not already be a part of another network. This is why you cannot have two primary controllers - each primary controller has a unique network ID number, and when a node is added to the network it is imprinted with that network ID, and so the node cannot communicate with devices on the other network.
The slave nodes in Z-Wave Network receive the commands and performs action based on the commands. These slave nodes are unable to transmit information directly to the other slave nodes or controllers unless they are instructed to do so in the commands. The slave nodes do not compute tables. They can store routing tables. They will act as a repeater.
|Door Sensor as a node||RGBW controller as a node||TKB dimmer as a node|
In a Z-Wave network there are 3 type of hardware devices.
Controller: USB stick and IP gateway allow PC software to access network.
Sensors: Those devices who report information by sending a digital or analogue signal to controller. There are two type of sensors.
Digital Sensors: Measure analogue parameters like temperature, pressure, flow, level, humidity etc.
Analogue Sensors: Measure digital parameters like door/glass breaking, motion detector and flood warning etc.
Actuators: Devices that switch digital or analogue signals. They can be only switch( ON/OFF) or dimmer (0% to 100%). Some Examples of actuators are: Electrical switches, electrical dimmers, thermostat control, electrical motors etc.
|Z-Wave Motion Sensor||Z-Wave Thermostat||Z-Wave Dimmer|
Network and Node ID:
Z-Wave protocol uses Network ID field to separate the Network from each other. Network ID is a 32 bit unique identifier which will be pre-programmed in all the controllers. All the nodes need Network ID value in order to communicate in the Z-Wave Network.
Node ID is 8 bit value just like the Network ID. Node ID's are used in order to address individual nodes in the Z-Wave Network.
Z-Wave is user friendly and provides a simple system that customers can set up themselves. If you prefer, you can also hire a professional to install the system in your home. Once you purchase your Z-Wave controller, you only need to decide which devices you want to connect.
Z-Wave is ideal for someone with a basic understanding of technology who wants to keep their home automation secure, efficient, simple to use, and easy to maintain. Z-Wave works with the most popular brands and smart home devices, so customers shouldn’t experience limitations.
Although Z-Wave is probably best wireless protocol but Z-Wave devices are little bit of expensive. If anyone wants most reliable system then they should go with Z-Wave products.
Z-Wave security layer provides secured communication between nodes as well as between controllers and nodes. Every Z-Wave network, and the devices within each network, are assigned unique IDs that communicate with controller of same network only. This makes Z-Wave network more secured because any other controller can never control your network.
Applications in Home Automation:
Z-Wave has played a vital role in Home Automation.
What you can do with Z-Wave?
Monitoring and control of Home resources from anywhere in the world.
It provides solutions regarding Smart lighting, thermal comfort using smart thermostat, security, energy saving, multimedia, smart irrigation, blinds control, comfort and luxury.
Create lighting, blinds, security and thermostat scenes for morning, evening and night.
Make your home look occupied when you are away, control lights, thermostat, curtains when you are on vacation.
Make alerts when you are away and something went wrong in your home.
Never come back home with a dark house, turn on lights from outside or through motion/door sensors.
Activate scenes like Good Night, Good Morning, Good Bye, I'm Back with only single touch.
|Make your home "A Smart Home" with Z-Wave Technology|
Z-Wave alliance was established in 2005. It offers a wide range of services for manufacturers, developers, service providers and integrators who are interested in being part of the Z-Wave control revolution. Over 450 companies containing 1700 Z-Wave products has joined this alliance.
|Frequencies:||868.42 MHz( UAE, France, EU, India, Pakistan, Russia.)|
|908.4 MHz (USA, Maxico, Hong kong, Australia, Japan)|
|Maximum Data Speed:||100 Kbit/sec|
|Average Data Speed:||40 Kbit/sec|
|Network Topology:||Mesh Topology|
|Indoor Range:||40 meters|
|Outdoor Range:||100 meters|
|Founded- Union:||Z-Wave Alliance|
|Main Application:||Home Automation|
|Power Consumption:||Idle: 1 μA , Tx: 20 mA, Rx: 40 mA|