Bluetooth Module -HC05



Bluetooth is a name given to a wireless technology standard for exchanging data over short distances using short-wavelength UHF radio waves in the ISM band from 2.4 to 2.485 GHz from fixed and mobile devices, and building Personal area networks (PANs) invented by telecom vendor Ericsson in 1994. IEEE standardized Bluetooth as IEEE 802.15.1. Bluetooth communicates over a range of 0-30 feet with a power consumption of 0 dBm (1mW). Its range can be increased to 100 meters by amplifying power.

Bluetooth is a technology allowing wireless transmission of data between two Bluetooth capable devices such as- notebooks, laptops, personal computers, mobile phones and other electronic devices. It makes use of Frequency Hopping Spread Spectrum Technique (FHSS) in order to avoid any interference. Bluetooth communication occurs between a master and slave radio and each radio is capable of operating as a master and slave. Each radio consists of fixed unique 48-bit device address. There may be up to seven active slaves at a time, where master initiates a Bluetooth communication link. Once, a link is established the slave can request a master and it uses the statistical time division multiplexing for effective channel utilization.

Software and Hardware Requirements for Bluetooth interfacing and programming

Bluetooth SPP Manager – Android Mobile App