If you have heard about wireless communications, but are not certain what it all means, this short article might help clarify some of your questions. Mobile embedded devices are small consumer products with small dedicated computers inside them.
Most mobile devices communicate with other devices by way of a wireless link.
Communication A common example of a wireless mobile device that uses IR to establish a communication link is a television or stereo remote. You may point the remote at the television or stereo from across the room, and click buttons to turn the target device on or off and change channels. This is possible because the remote has an IR transmitter and its target device has an IR receiver that enables the one-way communication of data. This is done at UHF and microwave frequencies. This will allow the user to move around the office or even around the building and still maintain connection with the stationary system.