Archive for October 2015

Smart Homes, Sentrollers and ZigBee   Leave a comment

The estimates of how many connected devices will constitute the Smart Home market are all over the map. This sector is going to be big and will be extremely important to the future of the electronics industry

Smart Home: let us define the Smart Home as being a network of Sentrollers  – sensors, controllers and actuators, connected to a central home control box and from there to an intelligent dashboard in the cloud that can be monitored and controlled by web connected devices like smart phones.

Currently, there are 600m connected homes in the world- connected homes have some kind of internet connection. Of these, on the average, each has about ten connected wifi devices. This includes computers, laptops, phones, games, entertainment systems etc.

As the number of connected homes grows, there will be an increasing movement to incorporate sentrollers into the home. Whereas there are about 10 WiFi devices in the home today, within
ten years, we expect to see about 100 or more sentroller devices within each home.

This will include a network of different kinds of sensors spread throughout the home- temperature, motion, position, security, humidity, etc. that will track the life activity of those in the home. This includes position sensors for measuring whether a door or window is open or closed, motion sensors that track where in the house a certain occupant may be, temperature sensors to ensure that the house is at the proper temperature, while at the same time ensuring optimal use of energy (i.e. not heating or cooling the house when nobody is home. This can also include humidity sensors adjacent to plumbing fixtures to provide alerts in case of leaks.

Intelligence can enable many of these sensors to provide dual uses, i.e. when no one is in the home and the security system is on, a motion sensors can send an alarm, if it detects someone moving around. However, when the However, when the residents are home, the motion sensors can turn on lights to illuminate a path during the night or customise temperature for the room in which the person is in. The motion sensor could even activate the appropriate music selections to follow the person as they move from room to room.

Depending on their function, these sensors can communicate among themselves and to a central home control unit, which connects all the home’s systems to the internet and allows control and monitoring of the home via cloud intelligence, smart phones, tablets or other web connected devices.

Within the homes however, the devices need to talk to each other and to the central home router/network. There are a variety of wireless technology standards that can be used to tie together these sentrollers and make sure that they can reach the home control box (i.e. the router).

We believe that there will be three open standard based networks within the home. For example, WiFi – with its wide bandwidth (and power hungry) requirements, will be used for big data applications, like video streaming, music, phones, gaming, etc. In contrast, Bluetooth will be used for short range communications between low data rate devices like wearables and medical health (heart rate monitoring, fitness band). However, for most sensor applications in the home, IEEE 802.15.4 based protocols like
ZigBee will be the most suitable.

Operating in the 2.4GHz frequency range, able to transmit through walls, floors and furniture, and cover an entire house, IEEE 802.15.4 based wireless offers an ideal convergence of robustness, bandwidth, power requirement and cost.

Designers can essentially consider ZigBee as low data rate, low power WiFi. Most consumers have grown accustomed to charging their portable WiFi devices every day or so. In contrast, no one will want to
regularly change batteries on the  hundred or so sensor devices in the Smart Home of the future.
ZigBee offers the ability for a battery powered device to run for up to ten years without having to change or recharge the battery. Because ZigBee only needs to send small data packets on an occasional basis, it
does not require the power used by WiFi which continually transmits millions of data packets.

ZigBee offers various other advantages to the device developer. As an international standard, it enables design engineers the knowledge that their device can be used anywhere in the world, unlike some other non-standard wireless solutions like Zwave and EnOcean. Also, as it is an open international networking standard, there are many different companies offering ZigBee radio chips – this enables manufacturers to multisource the radio chips, not locking them into a single provider.

The new Smart Home – the Intelligent smart home – will be composed of a network of sensors, actuators and controllers – all connected by a reliable, robust and power efficient wireless connectivity standard, provides a path to the next generation, multi trillion dollar  electronic component and smart home devices market.

 

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