Download Microchip Technology Humidity Sensor PICtail Specifications

2.6.1 Ethernet and Wireless Routers
Ethernet is a branch of wired technologies under the Local Area Network
communication. Ethernet‟s standard practice used is the 802.3 which has been
created since the 1980‟s. Changes have occurred in the recent years to make
the Ethernet have higher bandwidth quality and improved media access control
methods. The standard connector used to connect the Ethernet port from the
computer to the Ethernet jack in the wall is called the RJ45 connector. This
connection is used in most home computers where it is an alternative way to
obtain internet access. In our system, we will have the Ethernet connection with
the wireless router to provide the network on which our wireless technology will
be able to connect to the Internet.
The system also needs to include a wireless method for connecting the smart
phone application with the main control unit. The use of a wireless router allows
our system to establish a network so that the smart phone can communicate with
the main control unit. Wirelessly routers connect the devices to the Internet
through the use of wireless chips embedded inside. The smart phone application
will be able to access the feedback and control system features anywhere,
whether it is inside the house included in the range of the wireless router, or out
on the wireless networks in virtual every corner of the nation.
Wireless routers that will be considered for use and purchase are either going to
be the 802.11g router or the 802.11n router. The n router has faster signal
strength than the g router with double the range. Other factors in considering the
n router vs. the g router is that n routers cost more but are backwards-compatible
meaning that n routers can still transmit data as g routers. In the 21 century the
wireless g routers is a fading technology they are being replaced with wireless n
routers.
An application can be developed for smart phones that simulate the control
panels display screen right on the smart phone. With the smart phone you can
access and control the comfort features from anywhere while connected to the
internet. While designing the smart phone application, connection speed is a
concern as we want real time data from the system and the ability to make
changes to the system.
2.6.2 Wireless Protocols
One of the main features of our system is having the different components
communicating wirelessly. The sensors recording temperature and humidity data
are going to report that data back to the main microcontroller, so that the correct
decision can be made to chose the most effective option for the desired settings.
The main microcontroller also has to be able to connect to the internet wirelessly,
for viewing and controlling for the end user. Additionally, once the system makes
a decision based on the settings the user has set, a signal will be sent to the
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