Pelatihan Mikrokontroler RC via Bluetooth September 2024 Pertemuan 2

Introduction

This tutorial provides a step-by-step guide to using Bluetooth with microcontrollers, based on the second session of the training series by ALKA TECHNOLOGY. You'll learn how to set up your microcontroller for Bluetooth communication, allowing you to control devices wirelessly. This knowledge is essential for anyone interested in IoT projects or remote device management.

Step 1: Setting Up the Microcontroller

1. Gather Your Materials

   • Microcontroller (such as Arduino or ESP32)
   • Bluetooth module (HC-05 or HC-06)
   • Jumper wires
   • Breadboard (optional for prototyping)

2. Connect the Bluetooth Module

   • Connect the VCC pin of the Bluetooth module to the 5V pin of the microcontroller.
   • Connect the GND pin of the Bluetooth module to the GND pin of the microcontroller.
   • Connect the TX pin of the Bluetooth module to a digital pin on the microcontroller (e.g., pin 10).
   • Connect the RX pin of the Bluetooth module to another digital pin on the microcontroller (e.g., pin 11).

3. Verify Connections

   • Double-check all connections to ensure there are no loose wires or incorrect placements.

Step 2: Programming the Microcontroller

1. Install the Arduino IDE

   • Download the Arduino IDE from the official website.
   • Install it on your computer following the setup instructions.

2. Write the Code

   • Open the Arduino IDE and create a new sketch.
   • Include the necessary libraries by adding the following lines at the top of your code:

     #include <SoftwareSerial.h>
     

   • Create a SoftwareSerial object to manage your Bluetooth communication:

     SoftwareSerial bluetooth(10, 11); // RX, TX
     

3. Setup Function

   • In the setup() function, initialize the Bluetooth serial and set the baud rate:

     void setup() {
         bluetooth.begin(9600);
         Serial.begin(9600);
     }
     

4. Loop Function

   • In the loop() function, check for incoming data and respond accordingly:

     void loop() {
         if (bluetooth.available()) {
             char data = bluetooth.read();
             Serial.println(data); // or add your control logic here
         }
     }
     

5. Upload the Code

   • Connect your microcontroller to your computer and select the correct board and port in the Arduino IDE.
   • Click on the "Upload" button to transfer the code to your microcontroller.

Step 3: Testing the Bluetooth Connection

1. Power Up the System

   • Ensure your microcontroller and Bluetooth module are powered on.

2. Connect Using a Smartphone

   • Turn on Bluetooth on your smartphone and search for available devices.
   • Pair with the Bluetooth module (default password is usually '1234' or '0000').

3. Use a Bluetooth Terminal App

   • Download a Bluetooth terminal app (such as Serial Bluetooth Terminal) on your smartphone.
   • Open the app and connect to your Bluetooth module.

4. Send Commands

   • Type commands on the app and observe the microcontroller's response via the Serial Monitor in the Arduino IDE.

Conclusion

In this tutorial, you learned how to set up a microcontroller for Bluetooth communication, program it, and test the connection using a smartphone. This foundational knowledge can be applied to various projects, enabling you to control devices wirelessly. As a next step, consider expanding your project by integrating sensors or additional functionalities to enhance your IoT applications.