Random Nerd Tutorials

Reviews – HC-05 Bluetooth Module


The HC-05 Bluetooth module is the most economical and easiest way to go wireless (via Bluetooth).

This module makes it easy for you to wirelessly extend your serial interface, so you can control any program running on your Laptop with serial port interface.


The 4 pins are:

  • VCC (Power 3.3 – 6V);
  • GND;
  • TXD;
  • RXD;

Default pairing code: 1234

Default baudrate: 9600

Usually this Bluetooth module is used with the Arduino, but it can be used with others microcontrollers devices. Here it’s how it’s wired with an Arduino:


So if you’re looking for a good way to communicate to your Arduino trough bluetooth this is a good way. I’ve already made a tutorial using this particular one and I’ll be doing more and the internet is full of tutorials using this exact model.

Buy Here: Arduino Wireless Bluetooth Transceiver Module

I’m not selling any product, but I do earn a small commission If you buy the item trough my links. You don’t pay more for the product or anything that’s just the way amazon does their advertisement. I’m not responsible for any problem with the product or anything I’m just telling what I really think about it. I would really appreciate if you use the links to buy. This is a way you can help me a bit improve my tutorials.

Thanks for reading, you can contact me by leaving a comment. If you like this post probably you might like my next ones, so please support me by subscribing my blog and my Facebook Page.

MicroPython Programming with ESP32/ESP8266 eBook

Learn how to program the ESP boards with MicroPython, including projects, tips, and tricks! The registrations are open for a limited time, so SIGN UP NOW »

Recommended Resources

Home Automation using ESP8266 »
Build IoT projects and home automation gadgets with the ESP8266 Wi-Fi module.

Build a Home Automation System »
Learn how to build a automation system using open-source hardware and software from scratch.

Arduino Step-by-Step Projects »
Build 25 cool Arduino projects with our course even with no prior experience!

Leave a Comment:

Add Your Reply

⏰ Registrations are open for "MicroPython Programming with ESP32 and ESP8266" eBook