DescriptionIt is used for many applications like wireless headsets, game controllers, wireless mice, wireless keyboards, and many more consumer applications. It has a range of up to <100m which depends upon the transmitter and receiver, atmosphere, geographic & urban conditions. It is an IEEE 802.15.1 standardized protocol, through which one can build a wireless Personal Area Network (PAN). It uses frequency-hopping spread spectrum (FHSS) radio technology to send data over the air. It uses serial communication to communicate with devices. It communicates with a microcontroller using a serial port (USART).HC-05 module InformationHC-05 has a red LED which indicates the connection status, whether the Bluetooth is connected or not. Before connecting to the HC-05 module this red LED blinks continuously in a periodic manner. When it gets connected to any other Bluetooth device, its blinking slows down to two seconds.This module works on 3.3V. We can connect 5V supply voltage as well since the module has on board a 5 to 3.3 V regulator.As the HC-05 Bluetooth module has a 3.3V level for RX/TX and the microcontroller can detect a 3.3 V level, so, no need to shift the transmit level of the HC-05 module. However, we need to shift the transmit voltage level from the microcontroller to the RX of the HC-05 module.The data transfer rate of the HC-05 module can vary up to 1Mbps in the range of 10 meters. SPECIFICATIONSBluetooth version: 2.0 EDR (Enhanced Data Rate)Frequency: 2.4 GHz ISM bandModulation: GFSK (Gaussian Frequency Shift Keying)Transmit power: Class 2 (up to 4 dBm)Sensitivity: -80 dBm typicalRange: approximately 10 meters (or 33 feet) in open airProfiles supported: SPP (Serial Port Profile), HID (Human Interface Device) and othersOperating voltage: 3.3V to 5V DCOperating current: less than 50mAStandby current: less than 2.5mASleep current: less than 1mAInterface: UART (Universal Asynchronous Receiver/Transmitter)Baud rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, and 460800Operating temperature: -20°C to 75°C (-4°F to 167°F)DOCUMENTATIONSUser GuideAndroid APPArduino SketchSHIPPING LIST1 x Bluetooth HC-05 Module
