Circuit Documentation

Summary

This circuit is designed to interface an Arduino UNO with various sensors and LEDs. The sensors include a DHT11 temperature and humidity sensor, a soil moisture module with a soil moisture sensor, and a pH meter. The circuit also includes two red LEDs with current-limiting resistors. The Arduino UNO reads data from the sensors and can control the LEDs.

Component List

1. 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

2. DHT11

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

3. Soil Moisture Module

   • Description: A module to measure soil moisture levels.
   • Pins: positive, negative, Analog, Digital, Ground, VCC

4. Soil Moisture Sensor

   • Description: A sensor to detect soil moisture.
   • Pins: VCC, GND, SIG

5. PH Meter

   • Description: A sensor to measure pH levels.
   • Pins: Signal, VCC, GND

6. LED: Two Pin (red)

   • Description: A red LED.
   • Pins: cathode, anode

7. Resistor

   • Description: A resistor with a resistance of 200 Ohms.
   • Pins: pin1, pin2

Wiring Details

Arduino UNO

• 5V connected to:

  • VCC of PH Meter
  • VCC of Soil Moisture Module
  • VCC of DHT11

• GND connected to:

  • GND of PH Meter
  • Ground of Soil Moisture Module
  • GND of DHT11
  • cathode of both LEDs

• D10 connected to:

  • pin2 of Resistor

• D11 connected to:

  • pin2 of Resistor

• A0 connected to:

  • Analog of Soil Moisture Module

• A1 connected to:

  • Signal of PH Meter

• A2 connected to:

  • DATA of DHT11

DHT11

• VCC connected to:

  • 5V of Arduino UNO

• GND connected to:

  • GND of Arduino UNO

• DATA connected to:

  • A2 of Arduino UNO

Soil Moisture Module

• VCC connected to:

  • 5V of Arduino UNO

• Ground connected to:

  • GND of Arduino UNO

• Analog connected to:

  • A0 of Arduino UNO

• positive connected to:

  • VCC of Soil Moisture Sensor

• negative connected to:

  • GND of Soil Moisture Sensor

Soil Moisture Sensor

• VCC connected to:

  • positive of Soil Moisture Module

• GND connected to:

  • negative of Soil Moisture Module

PH Meter

• VCC connected to:

  • 5V of Arduino UNO

• GND connected to:

  • GND of Arduino UNO

• Signal connected to:

  • A1 of Arduino UNO

LED: Two Pin (red)

• cathode connected to:

  • GND of Arduino UNO

• anode connected to:

  • pin1 of Resistor

Resistor

• pin1 connected to:

  • anode of LED

• pin2 connected to:

  • D10 or D11 of Arduino UNO

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)