Notice Board Display Using Bluetooth
Bluetooth is a Wireless communication protocol got its name after King Herald Bluetooth,Bluetooth is a IEEE 802.15.1 standard part of Personal Area Network (PAN) operates at 2.4GHz ISM band. Bluetooth uses Frequecy Hop Spread Spectrum(FHSS). Bluetooth divides transmitted data into packets, and transmits each packet on one of 79 designated Bluetooth channels. Each channel has a bandwidth of 1 MHz. It usually performs 800 hops per second, Bluetooth Module HC-05 is the serial device.
It has six pins
1. State -leave it floating
2. Rx- Should be connected to Tx of UART
3. Tx- Should be connected to Rx of UART
4. Gnd- connect it to Ground(0V)
5. Vcc- connect it to 5V
6. Enable- used in AT command mode.
Before using Bluetooth Module initially it is configured through AT commands.
use USB-TTL converter
Cool-Terminal
USB-Serial(TTL) Converter
Download - code
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