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Component Documentation

How to Use Arduino BT: Examples, Pinouts, and Specs

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Introduction

The Arduino BT is a microcontroller board based on the ATmega328P, integrated with a Bluetooth module that enables wireless communication. This board is ideal for projects that require remote control or data exchange without the need for a wired connection. Common applications include home automation, robotics, and wireless sensor networks.

Explore Projects Built with Arduino BT

Arduino UNO and Bluetooth Module HM-10 Based Wireless Communication System

Image of 1: A project utilizing Arduino BT in a practical application

This circuit consists of an Arduino UNO connected to an HM-10 Bluetooth module. The Arduino provides power to the Bluetooth module and facilitates serial communication between the two devices, enabling wireless data transmission.

Open Project in Cirkit Designer

Arduino UNO Bluetooth-Controlled Robotic Arm with Servo Motors and DC Motors

Image of ROBOTIC_ARM: A project utilizing Arduino BT in a practical application

This circuit is a Bluetooth-controlled robotic system powered by an Arduino UNO, which drives two DC motors via an L298N motor driver and controls six servos. The system includes an HC-05 Bluetooth module for wireless communication, and a DC-DC buck converter to step down the voltage from a 12V battery to power the servos and other components.

Open Project in Cirkit Designer

Arduino UNO Bluetooth-Controlled Robotic Car with Motor Driver and Relay

Image of l298n: A project utilizing Arduino BT in a practical application

This circuit is a Bluetooth-controlled robotic system using an Arduino UNO, an L298N motor driver, and an HC-05 Bluetooth module. The Arduino receives commands via Bluetooth to control the direction and movement of two motors, as well as to toggle a relay for additional functionality.

Open Project in Cirkit Designer

Arduino UNO Bluetooth-Controlled Robotic Car with LCD Display and RGB LED

Image of car bluetooth laser servo ...: A project utilizing Arduino BT in a practical application

This circuit is a Bluetooth-controlled robotic vehicle with an Arduino UNO as the main controller. It includes motor drivers to control four motors, a servo for directional control, an RGB LED for status indication, a laser diode, and an I2C LCD for displaying messages. The system can receive commands via Bluetooth to control the motors, LED, laser, and servo.

Open Project in Cirkit Designer

Explore Projects Built with Arduino BT

Image of 1: A project utilizing Arduino BT in a practical application

Arduino UNO and Bluetooth Module HM-10 Based Wireless Communication System

This circuit consists of an Arduino UNO connected to an HM-10 Bluetooth module. The Arduino provides power to the Bluetooth module and facilitates serial communication between the two devices, enabling wireless data transmission.

Open Project in Cirkit Designer

Image of ROBOTIC_ARM: A project utilizing Arduino BT in a practical application

Arduino UNO Bluetooth-Controlled Robotic Arm with Servo Motors and DC Motors

This circuit is a Bluetooth-controlled robotic system powered by an Arduino UNO, which drives two DC motors via an L298N motor driver and controls six servos. The system includes an HC-05 Bluetooth module for wireless communication, and a DC-DC buck converter to step down the voltage from a 12V battery to power the servos and other components.

Open Project in Cirkit Designer

Image of l298n: A project utilizing Arduino BT in a practical application

Arduino UNO Bluetooth-Controlled Robotic Car with Motor Driver and Relay

This circuit is a Bluetooth-controlled robotic system using an Arduino UNO, an L298N motor driver, and an HC-05 Bluetooth module. The Arduino receives commands via Bluetooth to control the direction and movement of two motors, as well as to toggle a relay for additional functionality.

Open Project in Cirkit Designer

Image of car bluetooth laser servo ...: A project utilizing Arduino BT in a practical application

Arduino UNO Bluetooth-Controlled Robotic Car with LCD Display and RGB LED

This circuit is a Bluetooth-controlled robotic vehicle with an Arduino UNO as the main controller. It includes motor drivers to control four motors, a servo for directional control, an RGB LED for status indication, a laser diode, and an I2C LCD for displaying messages. The system can receive commands via Bluetooth to control the motors, LED, laser, and servo.

Open Project in Cirkit Designer

Technical Specifications

Key Technical Details

Microcontroller: ATmega328P
Operating Voltage: 5V
Input Voltage (recommended): 2.5V - 12V
Digital I/O Pins: 14 (of which 6 provide PWM output)
Analog Input Pins: 6
DC Current per I/O Pin: 40 mA
Flash Memory: 32 KB (ATmega328P) of which 2 KB used by bootloader
SRAM: 2 KB (ATmega328P)
EEPROM: 1 KB (ATmega328P)
Clock Speed: 16 MHz
Bluetooth Module: Bluegiga WT11, iWrap 4.0.1 Bluetooth stack

Pin Configuration and Descriptions

Pin Number	Function	Description
1	TXD	Transmit pin for UART communication
2	RXD	Receive pin for UART communication
3-8	Digital Pins	General purpose digital I/O
9-10	PWM	PWM output for analog-like signal generation
11-16	Digital Pins	General purpose digital I/O
A0-A5	Analog Input	Analog sensor input pins
VIN	Voltage Input	Unregulated external power supply to board
5V	Regulated Power	Output to supply external components
GND	Ground	Common ground
RESET	Reset	Resets the microcontroller

Usage Instructions

Setting Up the Arduino BT

Powering the Arduino BT: The board can be powered via the USB connection or with an external power supply. The power source is selected automatically.
Pairing with Bluetooth: Before using the Arduino BT, it must be paired with the Bluetooth device. The default PIN code for pairing is 12345.
Programming the Board: Use the Arduino IDE to write and upload sketches to the Arduino BT. Select "Arduino BT" as the board type in the IDE.

Best Practices

Ensure that the voltage levels on the I/O pins do not exceed the specified limits to prevent damage.
When using PWM pins, remember that the frequency at which the PWM signal operates is fixed and may need to be adjusted for specific applications.
Always disconnect the Bluetooth module when uploading new sketches to avoid communication errors.

Example Code for Arduino UNO

// Blink an LED connected to pin 13 on the Arduino BT

void setup() {
  pinMode(13, OUTPUT); // Set pin 13 as an output
}

void loop() {
  digitalWrite(13, HIGH); // Turn the LED on
  delay(1000);            // Wait for a second
  digitalWrite(13, LOW);  // Turn the LED off
  delay(1000);            // Wait for a second
}

Troubleshooting and FAQs

Common Issues

Unable to Pair: Ensure the device you are trying to pair with is in discovery mode and the correct PIN code is entered.
Sketch Upload Fails: Check that the correct board and port are selected in the Arduino IDE. Also, ensure the Bluetooth module is disconnected during upload.

FAQs

Q: Can I use the Arduino BT with a battery? A: Yes, the Arduino BT can be powered using a battery within the recommended voltage range.

Q: How do I reset the Arduino BT? A: You can reset the board by pressing the onboard reset button or by sending a break signal over Bluetooth.

Q: What is the range of the Bluetooth connection? A: The range is typically up to 10 meters, but it can vary depending on environmental factors and the Bluetooth class of the connected device.

Q: How can I extend the range of the Bluetooth connection? A: Use an external antenna with the Arduino BT or ensure there are no physical obstructions between the connected devices.

For further assistance, consult the Arduino BT forums and community resources.