Project_Update_3.ino

/* ********************
Summer 2022 ELEE 4230 E
Project Update 3
Sidharth Chaudhary
******************** */
#include <SoftwareSerial.h>

#define LED 13 // Pin for LED indicator
#define sensorPin 3 // Pin for Ultrasonic Sensor
double timer = 0.0;
SoftwareSerial HM10(2, 3); // RX = 2, TX = 3
char appData;  
String inData = "";

void setup()
{
  Serial.begin(9600);
  HM10.begin(9600); // set HM10 serial at 9600 baud rate
  // Declare the LED as an output and snesorPin as input
  pinMode(LED, OUTPUT);
  pinMode(sensorPin,INPUT);
}

void loop() {
  HM10.listen();  // listen the HM10 port
  while (HM10.available() > 0) {   // if HM10 sends something then read
    appData = HM10.read();
    inData = String(appData);  // save the data in string format
    Serial.write(appData);
  }

  if (Serial.available()) {// Read user input if available.
    delay(10);
    HM10.write(Serial.read());
  }
  if ( inData == "F") {
    Serial.println("LED OFF");
    digitalWrite(LED, LOW); // switch OFF LED
    delay(500);
  }
  if ( inData == "N") {
    // Read input of ultrasonic on sensor pin 3
    byte state = digitalRead(sensorPin);
    // Read input of first ldr on analog pin A0
    int sensorValue = analogRead(A0);
    int sensorValue1 = analogRead(A1)
    // Convert analog reading to voltage
    float voltage = sensorValue * (5.0 / 1023.0);
    float voltage1 = sensorValue1 * (5.0 / 1023.0);
    // Print voltage for debugging
    Serial.println(voltage);
    // If room is dark enough to need lighting...
    if (voltage > 4.4 && voltage1 > 4.4) {
      // if there is motion in the room
      if (state == 1) {
        // Turn LED on
        digitalWrite(LED, HIGH);
        // reset timer to 0 seconds
        timer = 0;  
      } else {
        if (timer >= 10.0) // adjust number for time inactive in seconds
          digitalWrite(LED, LOW);
        else
          timer += 0.5;
      }
    } else {
      // Turn LED off
      digitalWrite(LED, LOW);
    }
    delay(500);
  }
}