Zigbee Home Automation (ZHA) allow a person to manage there Zigbee devices directly through an Home Assistant interface. In order to use the system, a person will have to plug a Zigbee coordinator dongle into their computers. Afterwards, the network can be paired to the Zigbee devices.
The ZHA system will manage the Zigbee protocol for the devices and will be able to managing thousands of different devices through the system, including smart bulb and motion sensors. Zigbee devices can be used in a variety of different ways within the mesh network. Some devices, such as smart bulbs or smart plugs, can act as router for the network.
How Zigbee Home Automation Works
These devices help to extend the range of the signal for the mesh network. Other devices, such as battery-powered motion sensor, are consider to be “sleepy” end devices. These devices remain in a low power state to conserve its battery power.
Because of this low power state, these devices does not act as routers for the network; they must remain within range of a router or coordinator node for the Zigbee network. Many Zigbee device manufacturers does not adhere to the Zigbee communication standard perfect. As a result, many Zigbee devices may not report the data that are available from those devices.
To handle these inconsistencies, quirks are implement into the ZHA system. Each quirk file within the system is used to translate the data from each Zigbee device with known manufacturer inconsistencies so that the data from those devices is usable within Home Assistant. For example, motion sensors may not report their battery percentage if their battery percentage does not match than the specifications for that particular model of motion sensor.
The hardware that is used to create a Zigbee network is important to the stability of that network. For instance, the Zigbee coordinator dongle that is used to communicate with each of the Zigbee devices in the network should be connect through a USB extension cable to the computer. Connecting the Zigbee coordinator dongle to a USB extension cable will move the device away from the computer.
Because computers and WiFi networks emits radio frequencies, moving the Zigbee coordinator away from the computer will reduce the number of instances in which these electronic device disrupts the Zigbee network. Additionally, using a Zigbee coordinator dongle that has an external antenna will create a stronger signal then if the Zigbee coordinator does not have an antenna. Interference with other wireless networks and devices is a common problem with Zigbee networks.
For example, WiFi and Bluetooth devices uses the same frequency band (2.4GHz) as Zigbee networks. As a result, these technologies can interfere with the signals from the Zigbee devices. To reduce the chance of interference, the user should create the Zigbee network on channels that are different from those used by the WiFi networks in the home.
Using these separate channels for the Zigbee and WiFi networks will improve the stability and reliability of the Zigbee network. ZHA creates a visual map of the Zigbee network that display within the Home Assistant user interface. This visual network map allow the users of the system to view the way in which each device is connected to the mesh network, and it allows those users to recognize any weak links within the network.
Additionally, the system is able to automatically push firmware update to the devices in the Zigbee network. While there are a variety of software options for Zigbee devices, ZHA was created to allow individuals to more easily use and manage their Zigbee networks and devices with its rapid setup process and visual interface for managing the Zigbee network.