CC2500 is wireless transmitter receiver developed by Texas instruments which is used in 2400-2483.5 MHz ISM/SRD band systems. In this project, the input present at PORTD of transmitter atmega8 is transmitted wirelessly to the PORTD of receiver atmega8. This project shows how to configure registers of CC2500, how to give commands to CC2500 and how to activate transmission or receiver mode of CC2500 via SPI interfacing with avr microcontroller. The CC2500 RF module is a low-cost 2.4 GHz transceiver used in very low power wireless applications. The RF transceiver is integrated with a highly configurable baseband modem. It support OOK, 2-FSK, GFSK, and MSK modulations. It works in voltage range of 1.8 – 3.6V. Two AA batteries are enough to power it.
Bluetooth protocol is not much encouraged for long duration applications due to power consumption limitations. Hence, for small gadgets which run on battery or limited power source, a new wireless data transfer protocol was needed which could manage working with low power consumption. To fulfill these requirements, a protocol named Zigbee was announced just at…
Wireless communication is among technology’s biggest contributions to mankind. Wireless communication involves the transmission of information over a distance without help of wires, cables or any other forms of electrical conductors. The transmitted distance can be anywhere between a few meters (for example, a television’s remote control) and thousands of kilometres (for example, radio communication). Some of the devices used for wireless communication are cordless telephones, mobiles, GPS units, wireless computer parts, and satellite television. The growth of wireless network has enabled us to use personal devices anywhere and anytime.
Wireless Fidelity, more known by its short form Wi-Fi, is a digital communications protocol, through which gadgets can communicate with each other in [[wysiwyg_imageupload::]]a unicast or a broadcasting manner without using any wires. Being a wireless protocol, Wi-Fi standard uses the ISM (Industrial, Scientific and Medical) band of frequency which are free to use and require no licensing. Launched in 2.4GHz with transmission rates of 1-2mbps, Wi-Fi now works at 5GHz frequency also with astounding data transmission rates reaching upto 54mbps at both frequencies. Wi-Fi is a marketing term applied to 802.11b IEEE standard, but it now ubiquitously used for all the standards that fall under 802.11 category of Wireless LAN. So, Wi-Fi defines 802.11 x standards where x is the respective Wi-Fi version. Popular Wi-Fi version are a, b, g and n. The term “Wi-Fi” was added only to make the standard more common and rhyming with “hifi”, it was later that “wireless fidelity” took the full form of this term.