Bluetooth HC-08

Bluetooth hc-08
the hc-08 is a low-cost, low-power bluetooth module designed for wireless communication between devices over short distances. it uses bluetooth 4.0 (bluetooth low energy, ble) for communication, which makes it suitable for power-efficient and wireless data exchange. the hc-08 module is widely used in various applications, such as home automation, robotics, iot (internet of things), and wireless sensor networks.

it can be used for serial communication with a microcontroller (like arduino) to transmit and receive data wirelessly. the hc-08 is simple to use, as it can be easily connected to any microcontroller via its uart (serial) pins. the module supports both master and slave modes, allowing it to either initiate or accept connections with other bluetooth-enabled devices.

specifications of bluetooth hc-08
general features
-bluetooth standard: bluetooth 4.0 (bluetooth low energy - ble)
-operating voltage: 3.3v to 5v (3.3v recommended for stable operation)
-communication interface: uart (tx/rx)
-transmission distance: up to 100 meters (depending on environment and obstacles)
-baud rate: 9600 (default), configurable from 1200 to 115200 baud
-compatibility: compatible with 3.3v logic systems (with voltage regulators for 5v systems)
-data transfer rate: up to 1 mbps
-pairing: can be paired with any bluetooth-enabled device, including smartphones, tablets, and other bluetooth modules
operating modes
-master mode: the hc-08 can be used to initiate a connection to another bluetooth device.
-slave mode: the hc-08 can also act as a slave, waiting for an incoming connection from a master bluetooth device.
power consumption
-idle mode current: 1.5 ma
-active mode current: 8-15 ma (depending on the communication rate)
-sleep mode current: < 1 µa
pinout
-vcc: power supply (3.3v or 5v)
-gnd: ground
-txd (transmit): transmit data (serial communication)
-rxd (receive): receive data (serial communication)
-state: connection status (high = connected, low = not connected)
-en (enable): to enable or disable bluetooth function (optional)
physical dimensions
-module dimensions: 27 mm x 13 mm x 2.4 mm
-weight: ~3g