Circuit Documentation

Summary of the Circuit

This circuit is designed to interface a DHT22 temperature and humidity sensor with an Arduino UNO R4 WiFi microcontroller. The DHT22 sensor is powered by the 5V supply from the Arduino and communicates via a digital pin. Additionally, there is an LED with a series resistor that is controlled by another digital pin on the Arduino. The LED serves as an indicator and the resistor limits the current through the LED to safe levels.

Component List

DHT22 (Wokwi Compatible)

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

Resistor

• Description: A passive two-terminal electrical component that implements electrical resistance as a circuit element.
• Value: 1000 Ohms

LED: Two Pin (red)

• Description: A red light-emitting diode.
• Pins: cathode, anode

Arduino UNO R4 WiFi

• Description: A microcontroller board based on the ATmega328P 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

Wiring Details

DHT22 (Wokwi Compatible)

• VCC connected to Arduino UNO R4 WiFi 5V
• SDA connected to Arduino UNO R4 WiFi D2
• GND connected to Arduino UNO R4 WiFi GND

Resistor

• pin1 connected to LED (red) anode
• pin2 connected to Arduino UNO R4 WiFi D3

LED: Two Pin (red)

• cathode connected to Arduino UNO R4 WiFi GND
• anode connected to Resistor pin1

Arduino UNO R4 WiFi

• 5V connected to DHT22 VCC
• D2 connected to DHT22 SDA
• GND connected to DHT22 GND and LED cathode
• D3 connected to Resistor pin2

Documented Code

sketch.ino

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

}

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

}

documentation.txt

(No additional documentation provided)