2013年9月28日星期六

What to Consider When Using Tablets and Smart phones in Home Automation Systems



Up until recently, integrators and end users had no choice but to use a dedicated and often proprietary touch panel to control their home automation or control system if they desired a comprehensive control interface. However, since the release of the first iPhone, iPad, and android devices, we have seen a clear trend that those mobile devices are used as the main control interface for control and automation systems.

This in turn, has started one of the great debates - can using tablets and smart phones replace expensive proprietary devices and bring home automation to the masses? Here, let’s check what advantages consumer based devices have to be a great replacement for proprietary devices.

Cost
The most obvious advantage is the cost of a smart phone or tablet compared to a proprietary control device. A typical dedicated touch screen could cost well over $2,000, while an iPad which is of similar size and capabilities to common touch panels will cost under $500. When Android devices are brought into the mix, the cost becomes even lower. When dealing with an installation that requires multiple touch devices, this price difference becomes a huge difference in the potential cost of the job.

Availability
These consumer devices are readily available from a number of different sources without the need for special accreditations or being locked into any single distributor. This means that when a device is broken, becomes faulty or needs to be replaced for any reason, it is much cheaper and more easily replaced than its proprietary counterparts.

Device Familiarity
The penetration of smart phone has been beyond 50% around the world and continues getting larger. Consumers will more than likely already be familiar with iOS or Android devices. This will ultimately mean that they are conditioned to the look and operation of these devices.

Device Processing Power
Most proprietary devices have in built processors; however the speed and power of these processors is severely lacking when compared with iOS and Android devices. They also have less memory and only small amounts of storage space for GUI files. This results in special programming being required to work around the limitations of the touch panels, while an iOS device can take almost anything an integrator can throw at it.

Additional Features
Tablets and smart phones have additional features that can be taken advantage of in home automation systems. The GPS can be used to implement interesting location based features, and the accelerometer and gyro sensors can also be put to imaginative use to allow for display rotation and other specific actions based on user movement. Multi touch is another feature that is not widely included in proprietary devices - this is an extremely powerful feature that allows us to improve human-device interaction through using a different number of fingers to interact with the display.

Existing Infrastructure
In many circumstances, the customer will already have a wireless network set up in the house for file and internet sharing. Because devices such as the iPad utilise standard protocols such as Wi-Fi, in most cases this network can be utilized to connect the mobile devices that will control the systems in the premises. This means there is no expensive special cabling required for network connectivity. No additional equipment is required to implement an iPad, iPhone or Android device into the system.

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