Circuit Documentation

Summary

This document provides a detailed overview of a circuit that includes various sensors, a Bluetooth module, and an Arduino UNO microcontroller. The circuit is designed to collect environmental data such as temperature, humidity, and gas concentration, and transmit this data via Bluetooth.

Component List

HC-05 Bluetooth Module

• Description: A Bluetooth module used for wireless communication.
• Pins: Key, VCC, TXD, RXD, State, GND

Rain/Snow Sensor - Board

• Description: A sensor board used to detect rain or snow.
• Pins: 1, 2, A0 (Analog), D0 (Digital), GND, VCC (5V)

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

DHT11 Humidity and Temperature Sensor

• Description: A sensor used to measure humidity and temperature.
• Pins: VDD, DATA, NULL, GND

Temperature Sensor (LM35)

• Description: A sensor used to measure temperature.
• Pins: +Vs, Vout, GND

MQ-7 Breakout

• Description: A sensor used to measure carbon monoxide (CO) levels.
• Pins: VCC, GND, DO, AO

Verter USB

• Description: A USB power supply module.
• Pins: VIN, ENABLE, GND, PS, PG, 5.0V

Wiring Details

HC-05 Bluetooth Module

• VCC connected to 5V on Arduino UNO
• GND connected to GND on Arduino UNO
• TXD connected to D0 on Arduino UNO
• RXD connected to D1 on Arduino UNO

Rain/Snow Sensor - Board

• GND connected to GND on Arduino UNO
• VCC (5V) connected to 5V on Arduino UNO
• A0 (Analog) connected to A2 on Arduino UNO

Arduino UNO

• 5V connected to VCC on HC-05 Bluetooth Module, Rain/Snow Sensor - Board, DHT11 Humidity and Temperature Sensor, Temperature Sensor (LM35), and MQ-7 Breakout
• GND connected to GND on HC-05 Bluetooth Module, Rain/Snow Sensor - Board, DHT11 Humidity and Temperature Sensor, Temperature Sensor (LM35), and MQ-7 Breakout
• A0 connected to DO on MQ-7 Breakout
• A1 connected to Vout on Temperature Sensor (LM35)
• D2 connected to DATA on DHT11 Humidity and Temperature Sensor
• D0 connected to TXD on HC-05 Bluetooth Module
• D1 connected to RXD on HC-05 Bluetooth Module
• A2 connected to A0 (Analog) on Rain/Snow Sensor - Board

DHT11 Humidity and Temperature Sensor

• VDD connected to 5V on Arduino UNO
• GND connected to GND on Arduino UNO
• DATA connected to D2 on Arduino UNO

Temperature Sensor (LM35)

• +Vs connected to 5V on Arduino UNO
• GND connected to GND on Arduino UNO
• Vout connected to A1 on Arduino UNO

MQ-7 Breakout

• VCC connected to 5V on Arduino UNO
• GND connected to GND on Arduino UNO
• DO connected to A0 on Arduino UNO

Verter USB

• Not connected in this circuit

Documented Code

Arduino UNO Code

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

This code is a basic template for the Arduino UNO. The setup function is used to initialize any settings or configurations, and the loop function contains the main code that runs repeatedly.