water_level.ino

// Sensor pins
#define sensorPower 7
#define sensorPin A0

#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128 // OLED display width,  in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels

// declare an SSD1306 display object connected to I2C
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// Value for storing water level
int val = 0;

void setup() {
  pinMode(sensorPower, OUTPUT);// Set D7 as an OUTPUT
  digitalWrite(sensorPower, LOW);// Set to LOW so no power flows through the sensor
  Serial.begin(9600);

  // initialize OLED display with address 0x3C for 128x64
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    while (true);
  }
}

void loop() {
  //get the reading from the function below and print it
  int level = readSensor();

  Serial.print("Water level: ");
  Serial.println(level);
  oled.clearDisplay(); // clear display
  oled.setTextSize(1);          // text size
  oled.setTextColor(WHITE);
  oled.setCursor(0, 0);       // position to display
  oled.println("Water level:");// text color
  oled.setCursor(75, 0);       // position to display
  oled.println(level); // text to display
  oled.display();

  
  delay(1000);
}

//This is a function used to get the reading
int readSensor() {
  digitalWrite(sensorPower, HIGH);  // Turn the sensor ON
  delay(10);              // wait 10 milliseconds
  val = analogRead(sensorPin);    // Read the analog value form sensor
  digitalWrite(sensorPower, LOW);   // Turn the sensor OFF
  return val;             // send current reading



  
}