#Arduino bluetooth transmitter serial

RXD pin receives serial data from the microcontroller. The State pin is LOW when the module is not paired and HIGH when it is. STATE pin can be used to determine the current status of the HC-05 module. Therefore, the module includes a linear 3.3V regulator, which allows a voltage from 3.6V to 6V to be used to supply power to the module. The maximum operating voltage of the bare HC-05 chip is 3.3V. To switch between roles, you need to configure the HC-05 module by putting it into AT mode and sending AT commands over the UART port. This mode is used in projects where two microcontrollers need to communicate wirelessly. In Master Role, the HC-05 actively searches for other Bluetooth devices and tries to initiate a connection. This is the module’s default role and is commonly used in projects where you want to control things using a smartphone. In Slave Role, the HC-05 module waits for other devices to initiate a connection. The HC-05 Bluetooth module can function in two main roles: Master and Slave. When data is written to the UART port, the HC-05 constructs a Bluetooth packet and sends it over the Bluetooth wireless connection. When the HC-05 receives data, it removes the Bluetooth headers and trailers and sends it to the UART port. In Data Mode, the HC-05 module acts as a transparent data gateway. In AT Mode, you can configure various settings of the HC-05 module, such as its name, baud rate, PIN code, and data rate. To distinguish between these two types of data, the HC-05 employs two distinct communication modes: AT mode and Data mode. Modes of OperationĬontrolling the HC-05 module and sending data through it are two different operations, but they are both accomplished through the serial interface. Just send data over a serial interface, and it’s piped through to whatever Bluetooth device it’s connected to. There’s no need to mess with Bluetooth protocols or the stack. To top it all off, these modules are very easy to use.

Its range gets a little weaker inside the house, especially because of the walls. It’s perfect for directly replacing a wired asynchronous serial interface!Įach of these modules contains a Bluetooth transceiver, meaning they’re capable of both sending and receiving data.Īs a Class 2 Bluetooth device, the HC-05 has a nominal range of 10 m.

#Arduino bluetooth transmitter Pc

The HC-05 is a Bluetooth-to-Serial-Bridge module that allows wireless communications between two microcontrollers or between a microcontroller and a smartphone, laptop, or desktop PC with Bluetooth capability. So, let’s get started! HC-05 Hardware Overview

#Arduino bluetooth transmitter how to

And in the final tutorial, you’ll learn how to make two Arduino boards communicate wirelessly using HC-05 Bluetooth modules.īy the end of these tutorials, you’ll have a good understanding of using the HC-05 Bluetooth module in your projects.

In the next tutorial, we’ll teach you how to configure the HC-05 using AT commands. This first tutorial will show you how to send and receive data between the HC-05 and your smartphone. But we don’t want to overwhelm you with too much information at once, so we’ll split it into three easy-to-follow tutorials.

In this tutorial, we’ll help you get started with the HC-05. You can easily find it for around $5 online, making it a budget-friendly option to add Bluetooth connectivity to your project. One of the most affordable and widely used Bluetooth modules is the HC-05. It can be used for real-time data logging, or controlling a project using a smartphone. In our world of embedded electronics, Bluetooth serves as an excellent way to transmit small amounts of data wirelessly over short distances (less than 100 meters). It’s a word we hear all the time and is in millions of products we use everyday, including headsets, cellphones, laptops, game controllers, activity trackers, and so on.