// Name of ADC channel
int Pot1;
float Pot1_volt;

// Name of LED Channel
int LED1 = 22; // Active Low

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, welcome to test ADC ");
  pinMode(LED1, OUTPUT);
}

void loop() {
  // Read potentiometer value and calculate voltage
  Pot1 = analogRead(26);
  Pot1_volt = (float) Pot1 * 3.3 / 4095; // using 12 bit & Vref 3.3 Volt
  Serial.print("ADC value : ");
  Serial.print(Pot1); // show ADC Value
  Serial.print("\t");
  Serial.print("ADC Voltage: ");
  Serial.println(Pot1_volt); // Show Voltage of ADC
  delay(300);
  
  // call alarm fuction to control the LED based on voltage
  alarm(Pot1_volt, LED1, 1000, 1000, 500, 500, 200, 200);

}

void blink(int channel, int on, int off) {
  digitalWrite(channel, LOW); // Turn in the LED
  delay(on);
  digitalWrite(channel, HIGH); // Turn off the LED
  delay(off);
}

/*
safe 0 - 1.1
warn 1.1 - 2.2
danger 2.2 - 3.3
*/
void alarm(float ch_adc, 
           int ch_led, 
           int safe_on, 
           int safe_off, 
           int warn_on, 
           int warn_off, 
           int danger_on, 
           int danger_off) {
  // safe condition
  if (ch_adc <= 1.1) {
    blink(ch_led, safe_on, safe_off);
    Serial.println("Condition: Safe");    
  }
  // warning condition
  else if (ch_adc > 1.1 & ch_adc < 2.2) {
    blink(ch_led, warn_on, warn_off);
    Serial.println("Condition: Warning");    
  }
  // danger condition
  else if (ch_adc >= 2,2) {
    blink(ch_led, danger_on, danger_off);
    Serial.println("Condition: Danger");    
  }

}