Wireless Robotic Control Using Wi-Fi

Pages: 9 (2178 words) Published: February 6, 2011







SHREEN SITHARA Y, DEVISHREE V B.TECH IT,III Year, B.TECH IT,III Year, shreensithu.46@gmail.com sowmiselvi@gmail.com

Controlling ROBOTS using Wireless fidelity:

Stuffing inside:


By 1997 the idea of fidelity (from the Spanish word fidelita meaning accuracy, spread widely in a certain place) became popular which gave birth to the hot technology of present namely WI-FI i.e., wireless fidelity. It was developed to improve the interoperability of wireless local area network products based on the IEEE 802.11 standards by providing communication between nodes via RF waves of certain frequency. In this paper I would be presenting a preamble to Wi-Fi and about Wireless Control of Robots using Wi-Fi The basic idea behind this paper includes the concept of Wi-Fi and simple microprocessors which can be used for guiding the Final Control Element of typical robots (more often they are stepper motors). Normally the wireless control of Robots are done using higher level microprocessors/controllers, complex coding in the receiving side with single channel transmission of control signals which proves too costly for local use. In this paper, my new idea based on Wi-Fi gives a simple but effective way for controlling Robots in an easier and cheaper way such that they can be used for domestic purposes too.

An Introduction to WI-FI:


What Is Wi-Fi?

A wireless network uses radio waves, just like cell phones, televisions and radios do. In fact, communication across a wireless network is a lot like two-way radio communication. Here's what happens:

1. A computer's wireless adapter translates data into a radio signal and transmits it using an antenna.

2. A wireless router receives the signal and decodes it. It sends the information to the Internet using a physical, wired Ethernet connection.

The process also works in reverse, with the router receiving information from the Internet, translating it into a radio signal and sending it to the computer's wireless adapter.

The radios used for Wi-Fi communication are very similar to the radios used for walkie-talkies, cell phones and other devices. They can transmit and receive radio waves, and they can convert 1s and 0s into radio waves and convert the radio waves back into 1s and 0s. But Wi-Fi radios have a few notable differences from other radios:

• They transmit at frequencies of 2.4 GHz or 5GHz. This frequency is considerably higher than the frequencies used for cell phones, walkie-talkies and televisions. The higher frequency allows the signal to carry more data.

• They use 802.11 networking standards, which come in several flavors:

• 802.11b was the first version to reach the marketplace. It's the slowest and least expensive standard, and it's becoming less common as faster standards become less expensive. 802.11b transmits in the 2.4 GHz frequency band of the radio spectrum. It can handle up to 11 megabits of data per second, and it uses complimentary code keying (CCK) coding.

• 802.11g also transmits at 2.4 GHz, but it's a lot faster than 802.11b -- it can handle up to 54 megabits of data per second. 802.11g is faster because it uses orthogonal frequency-division multiplexing (OFDM), a more efficient coding technique.

• 802.11a transmits at 5GHz and can move up to 54 megabits of data per second. It also and uses OFDM coding. Newer standards, like 802.11n, can be even faster than 802.11g. However, the 802.11n standard isn't yet final.

• Wi-Fi radios can transmit on...
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