++
/**
 * This is Arduino code for AM2320 Temperature and Humidity Sensor with LCD1602 and I2C Module
 * which displays the temperature and RH (relative humidity)
 * on an LCD1602 with an I2C module.  The code was combined by Robojax.
 * 
    Original Code For AM2320 :https://github.com/hibikiledo/AM2320
    Copyright 2016 Ratthanan Nalintasnai
    
    Modified for Robojax.com video by
    Ahmad S. on March 22, 2018 at 23:55 in Ajax, Ontario, Canada
    This code, with library and other codes, is available at
    https://robojax.com
    Watch the video instruction for this code: https://youtu.be/ym567hneDpE
**/

// Include library for AM2320
#include <AM2320.h>
// Create an instance of the sensor
AM2320 sensor;


#include <Wire.h> 
// Include the LiquidCrystal library for display
#include <LiquidCrystal_I2C.h>

// Set the LCD address to 0x27 for a 16 chars and 2 line display
LiquidCrystal_I2C lcd(0x27, 16, 2);


void setup() {
  // Call sensor.begin() to initialize the library
  sensor.begin();

  // Robojax code for LCD with I2C
  // Initialize the LCD, 
  lcd.begin();
   // Turn on the backlight and print a message.
  lcd.backlight();
  lcd.print("Robojax AM2320 ");
  lcd.setCursor (0,1);
  lcd.print("LCD1602 I2C Demo");
  delay(3000);
}

void loop() {
  if (sensor.measure()) {
    lcd.clear();
    lcd.print("T:");
    lcd.print(temp('F'));
    lcd.print("F/");
    lcd.print(temp('C'));
    lcd.print("C");  
    lcd.setCursor (0,1); // go to start of 2nd line
    lcd.print("R.H. :");
    lcd.print(sensor.getHumidity());
    lcd.print("%"); 
  

  }
  else {  // An error has occurred
    int errorCode = sensor.getErrorCode();
    switch (errorCode) {
      case 1: lcd.print("ERR: Sensor offline"); break;
      case 2: lcd.print("ERR: CRC failed."); break;
    }    
  }

  delay(500);
}

/*
 * temp()
 * Returns the temperature based on the input character T.
 * If T == 'F', converts Celsius to Fahrenheit.
 * Otherwise, returns Celsius.
 * How to use:
 *  To get Fahrenheit, use temp('F').
 *  To get Celsius, use temp('C') or temp('').
 *  temp('') uses an empty single quote.
 * 
 */
float temp(char T)
{
  if (sensor.measure()) {
    if(T =='F')
    {
      // Convert to FAHRENHEIT and return
      // Robojax video tutorial
      return sensor.getTemperature()* 1.8 + 32;
    }else{
      return sensor.getTemperature();// Return CELSIUS
    }

  }// if sensor.measure  
}

/*********************************************************************
Original source: http://playground.arduino.cc/Main/I2cScanner

This program will find the I2C address on the I2C device. Just upload the code into your Arduino
and open the serial monitor and wait. It will display the I2C address as 0x3C or similar.

 * Please view other RoboJax codes and videos at http://robojax.com/learn/arduino
 * If you are sharing this code, you must keep this copyright note.
 * 
*********************************************************************/


#include <Wire.h>
 
 
void setup()
{
  Wire.begin();
 
  Serial.begin(9600);
  while (!Serial);             // Leonardo: wait for serial monitor
  Serial.println("\nI2C Scanner");
}
 
 
void loop()
{
  byte error, address;
  int nDevices;
 
  Serial.println("Scanning...");
 
  nDevices = 0;
  for(address = 1; address < 127; address++ )
  {
    // The I2C scanner uses the return value of
    // the Wire.endTransmission to see if
    // a device did acknowledge the address.
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
 
    if (error == 0)
    {
      Serial.print("I2C device found at address 0x");
      if (address<16)
        Serial.print("0");
      Serial.print(address,HEX);
      Serial.println("  !");
 
      nDevices++;
    }
    else if (error==4)
    {
      Serial.print("Unknown error at address 0x");
      if (address<16)
        Serial.print("0");
      Serial.println(address,HEX);
    }    
  }
  if (nDevices == 0)
    Serial.println("No I2C devices found\n");
  else
    Serial.println("done\n");
 
  delay(5000);           // wait 5 seconds for next scan
}