|Training course on personal home automation - Chapter 5|
Actuators and devices
Automation Center (HUB)
Remaining on the anatomical metaphor of the previous cards, a nervous ganglion it is a point of concentration of the nerves, suitable for the channeling of nerve signals from and to the central nervous system.
Even in personal home automation, as well as in a human organism, exist for theappanointed gods ganglia, or the components that allow communications channeling. In itself also the router Wi-Fi/ Ethernet rappit resists a nervous ganglion of the network (because it manages and channels the communications TCP/IP), but in this form we will deal with a specific type of ganglion, which we will call BRIDGE/Gateway.
The necessity of prolight and fast tocollets, specific for communications with actuators, with sensors and home automation devices has given life to standards like it ZigBee, Z-Wave and others to support the old and tested Wi-Fi TCP/IP. So that the components that use these new standards can therefore "talk" with the appcontrol licenses and, in specific cases, with the cloud of proconductor, it is necessary that they can, in some way, translate communications from their communication standard to TCP/IP, That appgrease used by smartphones / tablets / computers on which "run" the applicenses referred to above. Obviously the components already TCP/IP (via Wi-Fi or cable) do not usually need any BRIDGE/Gateway.
for appThe licenses that they need instead were born, over time, varied BRIDGE/Gateway (the word BRIDGE, bridge in English, says it all), some made by procomponent manufacturers to manage i propri components, others more “standard”, usable as jokers to control more components that use the same communication standard, even lines products e prodifferent drivers.
Specimens of BRIDGE/Gateway ZigBee↔︎TCP/IP (therefore able to communicate components ZigBee with networks TCP/IP) are, for example:
In the case of the two elements mentioned above (Philips HUE Bridge e Xiaomi Mi Mijia) these are two mainly dedicated components to the control of devices for thelumination (respectively of the line "Philips HUE" and "Xiaomi Line Mi Smart Home“).
A couple of examples of components controlled by these BRIDGE I'm:
In the first example we have two white and colored light bulbs in the series Philips HUE, while In the second we have a Xiaomi smoke detection sensor.
Examples, however, of BRIDGE/Gateway "Jolly" (standard, cross-produttore) are, for example:
It is two USB Dongle antennas (but there are also other types) that can be mounted on a computer on which a software counterpart manages the type of network based on the protocollo offered by the antenna and the relative translation of communications to TCP/IP.
I BRIDGE/Gateway they are components very widespread: the choice of which (if any) to adopt is in any case always linked to the type of personal home automation you want to equip yourself with. Some, in fact, act (coupled with their app of control and management) from HUB of automation, a concept that we explain in prossima card.
|Side reflection: but if everyone, more or less, has a router Wi-Fi/ Ethernet based on TCP, why not use this standard only proProtocol? Simple: because many home automation components are battery powered and the components for the transmission Wi-Fi/ Ethernet is energy-intensive (as the transmission is always-connected). Standard like ZigBee e Z-Wave, for example, they are expressly designed with energy saving in mind.|