Circuit Documentation

Summary

This document provides a detailed overview of a circuit that interfaces an Arduino UNO with a Bluetooth module. The Arduino UNO is used to establish serial communication with the Bluetooth module, allowing for data exchange. The Bluetooth module is connected to the Arduino's hardware serial pins (D0 for RX and D1 for TX). The Arduino reads data from the Bluetooth module and echoes it back.

Component List

Arduino UNO

• Description: A microcontroller board based on the ATmega328P.
• Pins: UNUSED, IOREF, Reset, 3.3V, 5V, GND, Vin, A0, A1, A2, A3, A4, A5, SCL, SDA, AREF, D13, D12, D11, D10, D9, D8, D7, D6, D5, D4, D3, D2, D1, D0
• Purpose in Circuit: Acts as the main controller, handling serial communication with the Bluetooth module.

Bluetooth Module

• Description: A module that enables wireless communication via Bluetooth.
• Pins: en, vcc, gnd, txd, rxd, start
• Purpose in Circuit: Facilitates wireless communication with the Arduino UNO.

Wiring Details

Arduino UNO

• GND: Connected to Bluetooth module's gnd.
• Vin: Connected to Bluetooth module's vcc.
• D1 (TX): Connected to Bluetooth module's rxd.
• D0 (RX): Connected to Bluetooth module's txd.

Bluetooth Module

• gnd: Connected to Arduino UNO's GND.
• vcc: Connected to Arduino UNO's Vin.
• rxd: Connected to Arduino UNO's D1 (TX).
• txd: Connected to Arduino UNO's D0 (RX).

Code Documentation

Arduino UNO Bluetooth Communication Interface

/*
 * Arduino UNO Bluetooth Communication Interface
 * This sketch sets up serial communication between the Arduino UNO and a
 * Bluetooth module. The Bluetooth module is connected to the Arduino's
 * hardware serial pins (D0 for RX and D1 for TX). The Arduino will
 * continuously read data from the Bluetooth module and echo it back.
 */

void setup() {
  // Initialize serial communication at 9600 baud rate
  Serial.begin(9600);
}

void loop() {
  // Check if data is available to read from the Bluetooth module
  if (Serial.available() > 0) {
    // Read the incoming byte
    char incomingByte = Serial.read();
    // Echo the byte back to the Bluetooth module
    Serial.write(incomingByte);
  }
}

• File Name: sketch.ino
• Description: This code initializes serial communication at a baud rate of 9600. It continuously checks for incoming data from the Bluetooth module and echoes it back.