Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with various sensors, LEDs, a buzzer, and an ESP32-CAM module. The circuit is designed to monitor environmental conditions using sensors and provide visual and auditory feedback through LEDs and a buzzer. The ESP32-CAM module is powered by a 3.7V battery and is connected to the Arduino UNO for additional functionality.

Component List

1. LED: Two Pin (red)

   • Pins: cathode, anode
   • Description: Red LED for visual indication.

2. LED: Two Pin (green)

   • Pins: cathode, anode
   • Description: Green LED for visual indication.

3. Resistor (200 Ohms)

   • Pins: pin1, pin2
   • Description: Current limiting resistor for LEDs and other components.

4. MQ-2

   • Pins: GND, VCC, ANALOG, Digital
   • Description: Gas sensor for detecting various gases.

5. IR Sensor

   • Pins: out, gnd, vcc
   • Description: Infrared sensor for object detection.

6. Buzzer

   • Pins: PIN, GND
   • Description: Buzzer for auditory feedback.

7. Arduino UNO

   • 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
   • Description: Microcontroller for controlling the circuit.

8. ESP32 - CAM

   • Pins: 5V, GND, IO12, IO13, IO15, IO14, IO2, IO4, VOT, VOR, VCC, IO0, IO16, 3V3
   • Description: Camera module with Wi-Fi capabilities.

9. 3.7V Battery

   • Pins: +, -
   • Description: Power source for the ESP32-CAM module.

10. DHT11

    • Pins: DATA, GND, VCC
    • Description: Temperature and humidity sensor.

Wiring Details

LED: Two Pin (red)

• Anode connected to Resistor pin2.
• Cathode connected to GND.

LED: Two Pin (green)

• Anode connected to Resistor pin2.
• Cathode connected to GND.

Resistor (200 Ohms)

• Resistor 1:

  • Pin1 connected to Arduino UNO D3.
  • Pin2 connected to DHT11 DATA.

• Resistor 2:

  • Pin1 connected to Arduino UNO D4.
  • Pin2 connected to LED: Two Pin (green) anode.

• Resistor 3:

  • Pin1 connected to Arduino UNO D5.
  • Pin2 connected to LED: Two Pin (red) anode.

• Resistor 4:

  • Pin1 connected to Arduino UNO D8.
  • Pin2 connected to Buzzer PIN.

MQ-2

• GND connected to GND.
• VCC connected to VCC.
• ANALOG connected to Arduino UNO A0.

IR Sensor

• Out connected to Arduino UNO D2.
• GND connected to GND.
• VCC connected to VCC.

Buzzer

• PIN connected to Resistor pin2.
• GND connected to GND.

Arduino UNO

• D3 connected to Resistor pin1.
• D4 connected to Resistor pin1.
• D5 connected to Resistor pin1.
• D8 connected to Resistor pin1.
• A0 connected to MQ-2 ANALOG.
• D2 connected to IR Sensor out.
• D7 connected to ESP32 - CAM VOR.
• D6 connected to ESP32 - CAM VOT.

ESP32 - CAM

• 3V3 connected to 3.7V Battery +.
• GND connected to 3.7V Battery -.
• VOR connected to Arduino UNO D7.
• VOT connected to Arduino UNO D6.

3.7V Battery

• + connected to ESP32 - CAM 3V3.
• - connected to ESP32 - CAM GND.

DHT11

• DATA connected to Resistor pin2.
• GND connected to GND.
• VCC connected to VCC.

Documented Code

Arduino UNO Code (sketch.ino)

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

}

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

}

Additional Documentation (documentation.txt)

This documentation provides a comprehensive overview of the circuit, including a summary, detailed component list, wiring details, and the code used in the microcontroller.