/*
 *LCD Fuel Gauge for Honda SuperHawk 16L Tank
 *https://www.superhawkforum.com
 *Code by Will Lyon 7/24/2015. Contact: will.lyon12584@gmail.com
 *Uses the LcdBarGraph Library for Arduino. Author:  Balázs Kelemen. Contact: prampec+arduino@gmail.com
 *Designed to be used with the Adafruit 16x2 RGB LCD (both negative and positive work properly)
 *5V to fuel sensor Grn/Blk
 *Fuel sensor Gry/Blk to Analog 0 with 10k resistor to GND
*/

#include <LiquidCrystal.h>
#include <LcdBarGraph.h>
byte lcdNumCols = 16; // 16 columns in the 16x2 LCD
byte sensorPin = A0; // Fuel float sensor 5V input with 10k resistor to GND and Analog 0
LiquidCrystal lcd(7, 8, 9, 10, 11, 12); // LCD connected to digital 7-12
LcdBarGraph lbg(&lcd,16,0,1); // Parameters for LCD bar graph library
const int redPin = 5; // Red LCD backlight on Digital pin 5
const int grnPin = 6; // Green LCD backlight on Digital pin 6

void setup() {
  pinMode(redPin, OUTPUT);
  pinMode(grnPin, OUTPUT);
  lcd.begin(2, lcdNumCols);
  lcd.clear();
  delay(100);
}

void loop() {
  int level = analogRead(sensorPin); // Label sensor reading as "level"
  level = map(level, 624, 946, 0 ,1023); // Map the sensor's 624E/946F readings to 0-1023 for proper graph display
  lcd.setCursor(0, 0);
  lcd.print("E      ||      F"); // Static full/empty readout on the LCD
  lbg.drawValue( level, 1023);
  if (level < 200) // If the mapped value is below 200 (approx. 3L fuel remaining)
  {  
      analogWrite (grnPin, 255); // Turn the green LCD backlight off
      analogWrite (redPin, 0); // Turn the red LCD backlight on
  }
  else // Otherwise
  {
     analogWrite (grnPin, 0); // Turn the green LCD backlight on
     analogWrite (redPin, 255); // turn the red LCD backlight off
  }
  delay(100); // Delay between readings
}

/*
 *LCD Fuel Gauge for Honda SuperHawk 16L Tank
 *https://www.superhawkforum.com/forums/technical-discussion-28/fuel-gauge-mods-33365/
 *Basic concept found at http://www.pddnet.com/articles/2014/01/designing-arduino-fuel-gauge-warning-lights
 *Code by Will Lyon 7/26/2015. Contact: will.lyon12584@gmail.com
 *Uses the LcdBarGraph1.5 Library for Arduino. Author:  Balázs Kelemen. Contact: prampec+arduino@gmail.com
 *LCDBarGraph library can be found here: http://playground.arduino.cc/Code/LcdBarGraph#Download
 *Designed to be used with the Adafruit 16x2 RGB LCD (both negative and positive work properly)
 *5V to fuel sensor Grn/Blk
 *Fuel sensor Gry/Blk to Analog 0 with 10k resistor to GND
 *Light sensor to Analog 1 with 10k resistor to ground
*/

#include <LiquidCrystal.h> // Include Liquid Crystal library
#include <LcdBarGraph.h>   // Include LCD Bar Graph library

byte lcdNumCols = 16; // 16 columns in the 16x2 LCD
byte fuelPin = A0;    // Fuel float sensor 5V input with 10k resistor to GND and Analog 0

LiquidCrystal lcd(7, 8, 9, 10, 11, 12); // LCD connected to digital 7-12
LcdBarGraph lbg(&lcd,16,0,1);           // Parameters for LCD bar grah library
const int redPin = 5;                   // Red LCD backlight on Digital pin 5
const int grnPin = 6;                   // Green LCD backlight on Digital pin 6

void setup() {
//  Serial.begin(9600);       // Initialize communication with PC via serial monitor
  pinMode(redPin, OUTPUT);  // Configure red LED pin as output
  pinMode(grnPin, OUTPUT);  // Configure green LED pin as output
  pinMode(fuelPin, INPUT);  // Configure the fuel level sensor pin (A0) as an input
  lcd.begin(2, lcdNumCols); // Define LCD as having 2 rows and refer to the above byte for number of columns
  lcd.clear();              // Clear the LCD display
  delay(100);
}

void loop() {
  int level = analogRead(fuelPin);       // Label sensor reading as "level"
  level = map(level, 624, 946, 0 ,1023); // Map the sensor's 624E/946F readings to 0-1023 for proper graph display
  lcd.setCursor(0, 0);                   // Set cursor to top left of display
  lcd.print("E      ||      F");         // Static full/empty readout on the LCD
  lbg.drawValue( level, 1023);           // Draw graph as fuel level reading
  if (level < 200)                       // If the mapped value is below 200 (approx. 3L fuel remaining)
  {
    analogWrite (grnPin, 255); // Turn the green LCD backlight off
    analogWrite (redPin, 0);   // Turn the red LCD backlight on
  }
  else // Otherwise
  {
    analogWrite (grnPin, 0);   // Turn the green LCD backlight on
    analogWrite (redPin, 255); // turn the red LCD backlight off
  }
  delay(100);
}