Circuit Documentation

Summary

This circuit integrates an Arduino UNO microcontroller with a Bluetooth HC-06 module, a water sensor, a rain/snow sensor board, and a servo motor. The Arduino UNO reads data from the sensors and controls the servo motor. The Bluetooth module allows for wireless communication, enabling the transmission of sensor data to a remote device.

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

Bluetooth HC-06

• Description: A Bluetooth module for wireless communication.
• Pins: VCC, GND, TXD, RXD

Water Sensor

• Description: A sensor to detect the presence of water.
• Pins: -, +

Rain/Snow Sensor - Board

• Description: A sensor board to detect rain or snow.
• Pins: 1, 2, A0 (Analog), D0 (Digital), GND, VCC (5V)

Servo

• Description: A servo motor for precise control of angular position.
• Pins: GND, VCC, PWM

Wiring Details

Arduino UNO

• 5V: Connected to VCC of Rain/Snow Sensor - Board, VCC of Servo, VCC of Bluetooth HC-06
• GND: Connected to GND of Rain/Snow Sensor - Board, GND of Servo, GND of Bluetooth HC-06
• D3: Connected to TXD of Bluetooth HC-06
• D2: Connected to RXD of Bluetooth HC-06
• A0: Connected to A0 (Analog) of Rain/Snow Sensor - Board
• D7: Connected to PWM of Servo

Bluetooth HC-06

• VCC: Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO
• TXD: Connected to D3 of Arduino UNO
• RXD: Connected to D2 of Arduino UNO

Water Sensor

• -: Connected to pin 1 of Rain/Snow Sensor - Board
• +: Connected to pin 2 of Rain/Snow Sensor - Board

Rain/Snow Sensor - Board

• VCC (5V): Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO
• A0 (Analog): Connected to A0 of Arduino UNO
• 1: Connected to - of Water Sensor
• 2: Connected to + of Water Sensor

Servo

• VCC: Connected to 5V of Arduino UNO
• GND: Connected to GND of Arduino UNO
• PWM: Connected to D7 of Arduino UNO

Code Documentation

Arduino UNO Code

#include <SoftwareSerial.h>
SoftwareSerial mySerial(3,2);
const int soilSensorPin = A0;
int moistureValue = 0;

Servo myServo;
const int servoPin = 7;

void setup() {
  Serial.begin(9600); //open the serial port
  mySerial.begin(9600); // open the bluetooth serial port
}

void loop() {
  moistureValue = analogRead(soilSensorPin);
  int percentage = map(moistureValue, 1023, 0, 0, 100);
  Serial.print("Вологість дорівнює:");
  Serial.print(percentage);
  Serial.println("%");

  mySerial.print("Вологість:");
  mySerial.print(percentage);
  mySerial.println("%");

  if(mySerial.available()){
    Serial.println(mySerial.readString()); // send from serial to bluetooth
  }
  if(Serial.available()){
    mySerial.println(Serial.readString()); // send from bluetooth to serial
  }
}

This code initializes a software serial connection on pins D3 and D2 for communication with the Bluetooth HC-06 module. It reads the moisture value from the rain/snow sensor connected to pin A0 and maps it to a percentage. The moisture percentage is then printed to both the serial monitor and the Bluetooth module. The code also handles data transmission between the serial monitor and the Bluetooth module.