HC-05 bluetooth module

HC-05 bluetooth module

The HC-05 is a popular Bluetooth module commonly used in electronics and embedded systems to establish wireless communication between devices.

The HC-05 Bluetooth module is typically a small, rectangular-shaped PCB (Printed Circuit Board) with a few pins for electrical connections. It often comes with an onboard antenna and has a blue or black color, depending on the version.

The HC-05 bluetooth module is based on Bluetooth technology and typically uses Bluetooth version 2.0+EDR (Enhanced Data Rate). This version provides a relatively stable and reliable wireless communication link.

The HC-05 module can operate in two primary modes: Master mode and Slave mode.

In this mode, the HC-05 bluetooth module can actively initiate connections with other Bluetooth devices (such as smartphones or other HC-05 modules). It can establish multiple connections and is often used in scenarios where you want one device to control or communicate with several others.

In this mode, the HC-05 module waits to be paired with and controlled by a master device. It is commonly used when you want a microcontroller or embedded system to communicate wirelessly with a smartphone or PC.

The typical communication range of the HC-05 module is around 10 meters (about 33 feet), although this range can vary depending on factors like signal interference and the quality of the antenna.

The HC-05 module communicates with a microcontroller or other devices using a serial UART (Universal Asynchronous Receiver-Transmitter) interface. It has pins for TX (Transmit), RX (Receive), Vcc (Power supply), and GND (Ground) for interfacing with other components.

The module supports Bluetooth pairing and can be configured with a passkey for secure connections. This ensures that only authorized devices can establish a connection.

The HC-05 module can be configured and controlled using AT commands, allowing you to customize its behavior, change the device name, set the baud rate, and adjust other parameters.

The module typically operates on a voltage supply of 3.3 to 5 volts, making it compatible with most microcontrollers and embedded systems.

The HC-05 Bluetooth module is commonly used in various applications, including wireless communication for robotics projects, IoT (Internet of Things) devices, home automation, wireless sensors, and more.

The HC-05 module is widely available and relatively affordable, making it a popular choice for hobbyists and electronics enthusiasts.

Datasheet