/*
 ************************************************************** 
 *               Coal Stoker Flame Size Detector              * 
 *              Inspired by Uri Shaked project at             *
 *   https://wokwi.com/arduino/projects/305193627138654786    *
 *                Layout used as starting point               *
 *                  Copyright 2022 John Clark                 *
 *                       Version 0.10                         *
 **************************************************************
*/
#include <Servo.h>

float flamelevel = 0; // mapped and inverted % of sensor range

Servo servo;

// empirically relate flame % to actual fire condition (TBD)
const int minSurvive = 15; // minimum level for idle, below is outfire
const int idleLow = 20; // lowest reading for healthy idle
const int idleTarget = 30; // target reading for resting idle
const int firingLow = 70; // lowest reading for actively firing
const int firingHigh = 90; // reading for full firing



void setup() {

  Serial.begin(9600);

  servo.attach(4);

  // pinMode(redLED, OUTPUT); // set red led pin as output
  // digitalWrite(redLED, LOW); // turn off red led
  pinMode(0, INPUT);
  pinMode(8, OUTPUT);
  pinMode(6, OUTPUT);
  servo.write(270);
  digitalWrite(8, LOW);
    digitalWrite(6, LOW);
}

void loop() {
  float analogValue = analogRead(A0);
  Serial.print("Sensor RAW: ");
  Serial.println(analogValue, 0);
  flamelevel = map(analogValue, 0, 1024, 100, 0);
  Serial.print(flamelevel, 0);
  Serial.println("%");

  if (flamelevel >= firingHigh) {
    digitalWrite(8, HIGH);
    digitalWrite(6, HIGH);
    servo.write(270-180);
  }

  if (flamelevel <= idleLow) {
    digitalWrite(8, LOW);
    digitalWrite(6, LOW);
    servo.write(270);
  }



  delay(200);
}