Circuit Documentation

Summary

This circuit involves an Arduino UNO microcontroller interfacing with various sensors and displays. The components include a 16x2 I2C LCD, a 0.96" OLED display, a Soil Moisture Sensor, an NPK Soil Sensor, an RS485 module, and a 12V battery. The Arduino UNO serves as the central controller, reading data from the sensors and displaying information on the connected displays.

Component List

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

16x2 I2C LCD

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

0.96" OLED

• Description: A small OLED display with I2C interface.
• Pins: GND, VDD, SCK, SDA

Soil Moisture Sensor

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

NPK Soil Sensor

• Description: A sensor to measure nitrogen (N), phosphorus (P), and potassium (K) levels in soil.
• Pins: 12V DC, A, B, GND

RS485

• Description: A module for RS485 communication.
• Pins: VCC, RO, RE, GND, B, A, DE, DI

Battery 12V

• Description: A 12V battery for powering components.
• Pins: +, -

Wiring Details

Arduino UNO

• 5V: Connected to VCC of Soil Moisture Sensor, VDD of 0.96" OLED, VCC of RS485, VCC of 16x2 I2C LCD
• GND: Connected to GND of Soil Moisture Sensor, GND of 0.96" OLED, GND of RS485, GND of 16x2 I2C LCD
• SCL: Connected to SCK of 0.96" OLED, SCL of 16x2 I2C LCD
• SDA: Connected to SDA of 0.96" OLED, SDA of 16x2 I2C LCD
• A0: Connected to SIG of Soil Moisture Sensor

16x2 I2C LCD

• GND: Connected to GND of Arduino UNO
• VCC: Connected to 5V of Arduino UNO
• SDA: Connected to SDA of Arduino UNO
• SCL: Connected to SCL of Arduino UNO

0.96" OLED

• GND: Connected to GND of Arduino UNO
• VDD: Connected to 5V of Arduino UNO
• SDA: Connected to SDA of Arduino UNO
• SCK: Connected to SCL of Arduino UNO

Soil Moisture Sensor

• VCC: Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO
• SIG: Connected to A0 of Arduino UNO

NPK Soil Sensor

• 12V DC: Connected to + of 12V battery
• A: Connected to A of RS485
• B: Connected to B of RS485
• GND: Connected to - of 12V battery

RS485

• VCC: Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO
• A: Connected to A of NPK Soil Sensor
• B: Connected to B of NPK Soil Sensor

Battery 12V

• +: Connected to 12V DC of NPK Soil Sensor
• -: Connected to GND of NPK Soil Sensor

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:

}

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 Arduino UNO microcontroller.