Circuit Documentation

Summary

This circuit involves multiple Arduino microcontrollers, sensors, and a display. The primary components include DHT22 temperature and humidity sensors, LM35 temperature sensors, photocells (LDR), a 16x2 I2C LCD, and a pushbutton. The circuit is designed to read environmental data and display it on the LCD.

Component List

DHT22 (Wokwi Compatible)

• Description: Digital temperature and humidity sensor.
• Pins: VCC, SDA, NC, GND

Arduino UNO

• Description: 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

Arduino UNO R4 WiFi

• Description: Microcontroller board with WiFi capabilities.
• Pins: OFF, GND, VRTC, IIC0_SCL, IIC0_SDA, 3V3, GPIO 41, GPIO 0, GPIO 42, GPIO 43, GPIO 44, BOOT, IOREF, RESET, 5V, VIN, A0, A1, A2, A3, A4, A5, RSPCKA, CIPO, COPI, D0/RX, D1/TX, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, AREF, SDA, SCL

16x2 I2C LCD

• Description: 16x2 character LCD with I2C interface.
• Pins: GND, VCC, SDA, SCL

Photocell (LDR)

• Description: Light-dependent resistor.
• Pins: pin 0, pin 1

Resistor

• Description: Passive electrical component.
• Pins: pin1, pin2
• Properties: Resistance: 220 Ohms

Temperature Sensor (LM35)

• Description: Analog temperature sensor.
• Pins: +Vs, Vout, GND

Pushbutton

• Description: Simple pushbutton switch.
• Pins: Pin 3 (out), Pin 4 (out), Pin 1 (in), Pin 2 (in)

Wiring Details

DHT22 (Wokwi Compatible)

• GND connected to GND of Arduino UNO
• SDA connected to D2 of Arduino UNO
• VCC connected to 5V of Arduino UNO

Photocell (LDR)

• pin 0 connected to pin2 of Resistor and A0 of Arduino UNO R4 WiFi
• pin 1 connected to 5V of Arduino UNO R4 WiFi and VCC of 16x2 I2C LCD

Temperature Sensor (LM35)

• +Vs connected to 5V of Arduino UNO
• Vout connected to A0 of Arduino UNO
• GND connected to GND of Arduino UNO

16x2 I2C LCD

• GND connected to GND of Arduino UNO R4 WiFi
• VCC connected to 5V of Arduino UNO R4 WiFi
• SDA connected to A4 of Arduino UNO R4 WiFi
• SCL connected to A5 of Arduino UNO R4 WiFi

Pushbutton

• Pin 4 (out) connected to D3 of Arduino UNO

Resistor

• pin1 connected to GND of Arduino UNO R4 WiFi and GND of 16x2 I2C LCD
• pin2 connected to pin 0 of Photocell (LDR)

Documented Code

Arduino UNO (Instance 1)

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

}

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

}

Arduino UNO R4 WiFi

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

}

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

}

Arduino UNO (Instance 2)

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

}

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

}

Arduino UNO (Instance 3)

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

}

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

}

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