#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <TEA5767Radio.h>

LiquidCrystal_I2C lcd (0x27,16,2); // I2C address should be correct!!

// Radio stations at my home
int fm_stations[23] = {
  89.1,   // KBS 2
  89.7,   // WBS
  91.9,   // MBC FM4U
  93.1,   // KBS 1 FM
  93.9,   // CBS FM
  94.5,   // YTN FM
  95.1,   // TBS
  95.9,   // MBC
  96.7,   // Military
  97.3,   // KBS 1
  98.1,   // CBS FM
  99.1,   // Korean folk
  101.3,  // TBS eFM
  101.9,  // BBS
  102.7,  // AFN Eagle FM
  103.5,  // SBS Lover FM
  104.5,  // EBS
  104.9,  // KBS 3
  105.3,  // CPBC
  106.1,  // KBS 2
  106.9,  // febc
  107.7   // SBS Power FM
};

int analogPin = A3;
int reading;
int current;

TEA5767Radio radio = TEA5767Radio();

void setup() {
  Wire.begin();
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  lcd.setBacklight(HIGH);
  // Print a message to the LCD.
  lcd.print("DIY Radio V1.0");
  //  Serial.begin(9600);
  
  current = analogRead(analogPin);
  
  Serial.begin(9600);
  Serial.print("current: ");
  Serial.println(current);
}

void loop() {
  reading = analogRead(analogPin);

  Serial.print("reading: ");
  Serial.println(reading);

  if (reading != current) {
    Frequency_set();
  }
  delay(100);
}

void Frequency_set() {
//  Serial.println(reading);
  if (reading >= 0 && reading <= 44) {  // KBS 2
    radio.setFrequency(89.1); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("KBS 2, 89.1Mhz");
  }
  else if (reading >= 45 && reading <= 89) {  // WBS
    radio.setFrequency(89.7); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("WBS, 89.7Mhz");     
  }
  else if (reading >= 90 && reading <= 133) {  // MBC FM4U
    radio.setFrequency(91.9); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("MBC FM4U, 91.9Mhz");      
  }  
  else if (reading >= 134 && reading <= 178) {  // KBS 1 FM
    radio.setFrequency(93.1); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("KBS 1 FM, 93.1Mhz");       
  }  
  else if (reading >= 179 && reading <= 222) {  // CBS FM
    radio.setFrequency(93.9); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("CBS FM, 93.9Mhz");              
  }  
  else if (reading >= 223 && reading <= 267) {  // YTN FM
    radio.setFrequency(94.5); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("YTN FM, 94.5Mhz");      
  }
  else if (reading >= 268 && reading <= 311) {  // TBS
    radio.setFrequency(95.1); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("TBS, 95.1Mhz");      
  }
  else if (reading >= 312 && reading <= 356) {  // MBC
    radio.setFrequency(95.9); // pick your own frequency
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("MBC, 95.9Mhz");     
  } 
  else if (reading >= 357 && reading <= 400) {  // Military -> changed kung-in bangsong
    radio.setFrequency(90.7); // pick your own frequency    
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("Military, 90.7Mhz");    
  } 
  else if (reading >= 401 && reading <= 445) {  // KBS 1
    radio.setFrequency(97.3); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("KBS 1, 97.3Mhz");     
  } 
  else if (reading >= 446 && reading <= 489) {  // CBS FM
    radio.setFrequency(98.1); // 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("CBS FM, 98.1Mhz");      
  } 
  else if (reading >= 490 && reading <= 534) {  // Korean folk music -> Kunggi-Radio
    radio.setFrequency(99.9); // pick your own frequency
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("Korean folk, 99.9Mhz");      
  }                    
  else if (reading >= 535 && reading <= 578) {  // TBS eFM -> Military
    radio.setFrequency(96.9); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("TBS eFM, 96.9Mhz");      
  } 
  else if (reading >= 579 && reading <= 623) {  // BBS
    radio.setFrequency(101.9); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("BBS, 101.9Mhz");      
  }   
  else if (reading >= 624 && reading <= 667) {  // AFN Eagle FM
    radio.setFrequency(102.7); // pick your own frequency     
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("AFN Eagle, 102.7Mhz"); 
  } 
  else if (reading >= 668 && reading <= 712) {  // SBS Lover FM
    radio.setFrequency(103.5); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("SBS Love FM, 103.5Mhz");      
  } 
  else if (reading >= 713 && reading <= 756) {  // EBS
    radio.setFrequency(104.5); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("EBS, 104.5Mhz");      
  } 
  else if (reading >= 757 && reading <= 801) {  // KBS 3 -> Incheon bangsong
    radio.setFrequency(100.5); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("KBS 3, 100.5");      
  } 
  else if (reading >= 802 && reading <= 845) {  // CPBC
    radio.setFrequency(105.3); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("CPBC, 105.3Mhz");      
  } 
  else if (reading >= 846 && reading <= 890) {  // KBS 2
    radio.setFrequency(106.1); 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("KBS 2, 106.1Mhz");      
  } 
  else if (reading >= 891 && reading <= 934) {  // febc
    radio.setFrequency(102.7); // pick your own frequency     
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("FEBC, 102.7Mhz"); 
  } 
  else {  // SBS Power FM
    radio.setFrequency(107.7); // pick your own frequency 
    lcd.setCursor(0, 1);
    // print the radio station info to LCD
    lcd.print("                ");
    lcd.setCursor(0, 1);
    lcd.print("SBS Power FM, 107.7Mhz"); 
  }
  current = reading;
}