/*
Greenhouse Management System

Inputs:-
Taking analog values from:
1. Soil moisture sensor (simulated using potentiometer, Left = max moisture, Right = min moisture)
2. LDR sensor
3. Temperature sensor
I have converted these analog values of range 0 to 1024 into range 0 to 100 using the max() function for moisture and illumination


Outputs:-
1. Buzzer: when the soil moisture is less than 10%, it plays a tune as an indicator to ON water supply
2. Relay: when the light is below 50%, then it ON the LED by itself. Some plants need artificial light in the absence of sun

The Soil moisture, Illumination, and Temperature are displayed in the terminal in real-time.
I used FreeRTOS to schedule these 3 tasks.

Features:
- Real-time monitoring of concerned environmental conditions of a greenhouse
- When the farmer hears the buzzer he can provide water to the plants
- When illumination is less than required, lights in the greenhouse are ON on their own.

*/

#include <Arduino_FreeRTOS.h>
#include <SPI.h>
#include <Wire.h>
#define OLED_RESET 4
#define pot_in A0
#define ldr_in A1
#define relay_out 3
#define SPEAKER_PIN 8
#define temp_in A2
const float BETA = 3950; // should match the Beta Coefficient of the thermistor
void setup()
{
  Serial.begin(9600);
  //LEDs' initialization!
  pinMode(pot_in, INPUT);
  pinMode(ldr_in, INPUT);
  pinMode(relay_out, OUTPUT);
  pinMode(SPEAKER_PIN, OUTPUT);
    int moist=analogRead(pot_in);
    int moist_percentage = map (moist, 1024, 0, 0, 25);
    Serial.print("Starting Soil moisture:");
    Serial.print(moist_percentage);
    Serial.print("%");
    Serial.println(F(" [Moisture sensor]"));
    int light=analogRead(ldr_in);
    int light_percentage = map (light, 1024, 0, 0, 100);
    Serial.print("Starting Illumination:");
    Serial.print(light_percentage);
    Serial.print("%");
    Serial.println(F(" [Light sensor]"));
    int temp=analogRead(temp_in);
    float temp_celsius = 1 / (log(1 / (1023. / temp - 1)) / BETA + 1.0 / 298.15) - 273.15;
    //int temp_percentage = map (light, 0, 1024, 0, 100);
    Serial.print("Starting Temperature:");
    Serial.print(temp_celsius);
    Serial.println(F(" [Temperature sensor]"));
    if (light_percentage <= 50) {
    digitalWrite(relay_out, LOW);
     } 
    else if (light_percentage > 50){
    digitalWrite(relay_out, HIGH);}
    else if (moist_percentage <= 10) {
    tone(SPEAKER_PIN, 330);
    delay(150);
    tone(SPEAKER_PIN, 392);
    delay(150);
    tone(SPEAKER_PIN, 659);
    delay(150);
    tone(SPEAKER_PIN, 523);
    delay(150);
    tone(SPEAKER_PIN, 587);
    delay(150);
    tone(SPEAKER_PIN, 784);
    delay(150);
    noTone(SPEAKER_PIN);
     } 
  xTaskCreate(Task_1, "Task no. 1!", 100, NULL, 1, NULL);
  xTaskCreate(Task_2, "Task no.  2!", 100, NULL, 2, NULL);
  xTaskCreate(Task_3, "Task no.  3!", 100, NULL, 3, NULL);
}

static void Task_1(void* pvParameters) {
  while (1) {
    int moist=analogRead(pot_in);
    int moist_percentage = map (moist, 1024, 0, 0, 25);
    Serial.print("Soil moisture:");
    Serial.print(moist_percentage);
    Serial.print("%");
    Serial.println(F(" [Moisture sensor]"));
    if (moist_percentage <= 10) {
    tone(SPEAKER_PIN, 330);
    delay(150);
    tone(SPEAKER_PIN, 392);
    delay(150);
    tone(SPEAKER_PIN, 659);
    delay(150);
    tone(SPEAKER_PIN, 523);
    delay(150);
    tone(SPEAKER_PIN, 587);
    delay(150);
    tone(SPEAKER_PIN, 784);
    delay(150);
    noTone(SPEAKER_PIN);
     } 
    //else if (light_percentage > 50){
    //digitalWrite(relay_out, HIGH);}
    vTaskDelay(1000 / portTICK_PERIOD_MS);
  }
}

//Task 2
static void Task_2(void* pvParameters) {
  while (1) {
    int light=analogRead(ldr_in);
    int light_percentage = map (light, 0, 1024, 0, 100);
    Serial.print("Illumination:");
    Serial.print(light_percentage);
    Serial.print("%");
    Serial.println(F(" [Light sensor]"));
    if (light_percentage <= 50) {
    digitalWrite(relay_out, HIGH);
     } 
    else if (light_percentage > 50){
    digitalWrite(relay_out, LOW);}
    vTaskDelay(1100 / portTICK_PERIOD_MS);
  }
}

static void Task_3(void* pvParameters) {
  while (1) {
    int temp=analogRead(temp_in);
    float temp_celsius = 1 / (log(1 / (1023. / temp - 1)) / BETA + 1.0 / 298.15) - 273.15;
    //int temp_percentage = map (temp, 0, 1024, 0, 100);
    Serial.print("Temperature:");
    Serial.print(temp_celsius);
    //Serial.print("%");
    Serial.println(F(" [Temperature sensor]"));
    vTaskDelay(1100 / portTICK_PERIOD_MS);
  }
}

void loop()
{
}