Circuit Documentation

Summary

This document provides a detailed overview of a circuit that integrates various sensors and an OLED display with an Arduino UNO microcontroller. The circuit is designed to monitor environmental parameters such as soil moisture, temperature, humidity, water presence, gas concentration, and pH levels. The data collected from these sensors can be displayed on the OLED screen.

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. SparkFun Soil Moisture Sensor

   • Description: A sensor used to measure the moisture content in the soil.
   • Pins: VCC, GND, SIG

3. DHT11 Sensor V2

   • Description: A sensor used to measure temperature and humidity.
   • Pins: GND, DAT, VCC

4. 0.96" OLED

   • Description: A small OLED display used to show data.
   • Pins: GND, VDD, SCK, SDA

5. Water Sensor

   • Description: A sensor used to detect the presence of water.
   • Pins: Signal, VCC, GND

6. MQ-2

   • Description: A gas sensor used to detect various gases including LPG, smoke, alcohol, propane, hydrogen, methane, and carbon monoxide.
   • Pins: GND, VCC, ANALOG, Digital

7. PH Meter

   • Description: A sensor used to measure the pH level of a solution.
   • Pins: Signal, VCC, GND

Wiring Details

Arduino UNO

• 3.3V

  • Connected to VCC of 0.96" OLED
  • Connected to VCC of SparkFun Soil Moisture Sensor
  • Connected to VCC of DHT11 Sensor V2
  • Connected to VCC of Water Sensor
  • Connected to VCC of PH Meter

• 5V

  • Connected to VCC of MQ-2

• GND

  • Connected to GND of 0.96" OLED
  • Connected to GND of SparkFun Soil Moisture Sensor
  • Connected to GND of DHT11 Sensor V2
  • Connected to GND of Water Sensor
  • Connected to GND of PH Meter
  • Connected to GND of MQ-2

• A3

  • Connected to ANALOG of MQ-2

• A4

  • Connected to SCK of 0.96" OLED

• A5

  • Connected to SDA of 0.96" OLED

• D2

  • Connected to DAT of DHT11 Sensor V2

• D3

  • Connected to SIG of SparkFun Soil Moisture Sensor

• D4

  • Connected to Signal of Water Sensor

• D6

  • Connected to Digital of MQ-2

• D9

  • Connected to Signal of PH Meter

SparkFun Soil Moisture Sensor

• VCC

  • Connected to 3.3V of Arduino UNO

• GND

  • Connected to GND of Arduino UNO

• SIG

  • Connected to D3 of Arduino UNO

DHT11 Sensor V2

• VCC

  • Connected to 3.3V of Arduino UNO

• GND

  • Connected to GND of Arduino UNO

• DAT

  • Connected to D2 of Arduino UNO

0.96" OLED

• VDD

  • Connected to 3.3V of Arduino UNO

• GND

  • Connected to GND of Arduino UNO

• SCK

  • Connected to A4 of Arduino UNO

• SDA

  • Connected to A5 of Arduino UNO

Water Sensor

• VCC

  • Connected to 3.3V of Arduino UNO

• GND

  • Connected to GND of Arduino UNO

• Signal

  • Connected to D4 of Arduino UNO

MQ-2

• VCC

  • Connected to 5V of Arduino UNO

• GND

  • Connected to GND of Arduino UNO

• ANALOG

  • Connected to A3 of Arduino UNO

• Digital

  • Connected to D6 of Arduino UNO

PH Meter

• VCC

  • Connected to 3.3V of Arduino UNO

• GND

  • Connected to GND of Arduino UNO

• Signal

  • Connected to D9 of Arduino UNO

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 where you initialize your sensors and display, and the loop() function is where you continuously read sensor data and update the display.

Additional Documentation

This section is reserved for any additional documentation or notes related to the circuit and its operation.