What is Bluetooth Module HC-05? – Its Pinout | New Topic [2024]

In this blog, we are going to know a topic called “What is Bluetooth Module HC-05?” and about its pinout. Welcome to Poly Notes Hub, a leading solution for polytechnic notes for diploma engineering students.

Author Name: Arun Paul.

What is Bluetooth Module HC-05?

The Bluetooth Module HC-05 is a popular and frequently used Bluetooth module for electronics projects and applications. The Bluetooth protocol enables devices to communicate wirelessly across short distances. It is often used in applications that require wireless communication between microcontrollers, smartphones, PCs, and other devices.

The HC-05 module is straightforward to use and supports both the Serial Port Profile (SPP) and Bluetooth Low Energy (BLE) modes. It runs between 3.6V and 6V, making it compatible with a wide range of microcontrollers and devices.

Pinout of HC-05 Bluetooth Module

Here’s the pinout of the HC-05 module:

1. VCC: It is a Power supply pin. Connect this to a power source ranging from 3.6 to 6 volts.
2. GND: It is a Ground pin. Connect this to the ground on your power supply.
3. TXD: It is a Transmitter pin. This pin transfers data from the HC-05 module to another device.
4. RXD: It is a Receive a pin. This pin connects data from another device to the HC-05 module.
5. STATE: It is a Status pin. This pin indicates the module’s state (e.g., pairing mode or connected).
6. EN (Enable): It is a Enable pin. This pin is used to enable and disable the module. When pulled HIGH, the module is activated; when pushed LOW, it is deactivated.

HC 05 Connection with Arduino