#define POT_HOPPER 34
#define POT_VIBRATION 32
#define POT_FLOW 33

#define BTN_STOP 25
#define LED_PIN 26

bool stopped = false;

int percent(int raw) {
  return map(raw, 0, 4095, 0, 100);
}

void setup() {
  Serial.begin(115200);

  pinMode(BTN_STOP, INPUT_PULLUP);
  pinMode(LED_PIN, OUTPUT);

  Serial.println("MES SIM STARTED");
}

void loop() {

  // ---- STOP BUTTON ----
  if (digitalRead(BTN_STOP) == LOW) {
    stopped = true;
  }

  if (stopped) {
    digitalWrite(LED_PIN, LOW);
    Serial.println("SYSTEM STOPPED");
    delay(1000);
    return;
  }

  digitalWrite(LED_PIN, HIGH);

  // ---- READ POTS ----
  int hopper = percent(analogRead(POT_HOPPER));
  int vibration = percent(analogRead(POT_VIBRATION));
  int flow = percent(analogRead(POT_FLOW));

  // ---- STATE LOGIC ----
  String state = "RUNNING";

  if (vibration > 80) {
    state = "WARNING: VIBRATION";
  }

  if (flow < 20) {
    state = "WARNING: LOW FLOW";
  }

  // ---- OUTPUT ----
  Serial.println("\n--- MES CORE ---");

  Serial.print("HOPPER: "); Serial.print(hopper); Serial.println("%");
  Serial.print("VIBRATION: "); Serial.print(vibration); Serial.println("%");
  Serial.print("FLOW: "); Serial.print(flow); Serial.println("%");

  Serial.print("STATE: ");
  Serial.println(state);

  Serial.println("----------------");

  delay(1000);
}