/*
Exploring Arduino - Code Listing 6-2: Tabular Printing using Special Characters
http://www.exploringarduino.com/content/ch6

Copyright 2013 Jeremy Blum ( http://www.jeremyblum.com )
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License v3 as published by
the Free Software Foundation.
*/

//Tabular Serial Printing  of Leaf Sensor Signal Data - AgrHouse.com

const int LeafSensor1=0;  //Leaf Sensor on Analog Pin 0

void setup()
{
  Serial.begin(9600); //Start Serial Port with Baud = 9600
}

void loop()
{
  Serial.println("Leaf Sensor Arduino Data Logger");  // AgriHouse.com 
  Serial.println("\nAnalog Pin #\tRaw Value\tPercent");
  Serial.println("------------------------------------------");
  for (int i = 0; i < 10; i++)
  {
    int val = analogRead(LeafSensor1);           //Read Leaf Sensor Pin A0
    
    int per = map(val, 0, 1023, 0, 100); //Convert to Percentage
  
    Serial.print("A0\t\t");
    Serial.print(val);
    Serial.print("\t\t");     
    Serial.print(per);           //Print Percentage Analog Value
    Serial.println("%");         //Print % Sign and Newline
    delay(1000);                 //Wait 1 second, then repeat
  }  
}

// Note: Leaf Sensor Connection
// Connected Leaf Sensor to 3.3 vdc power source and ground (gnd)
// Leaf Sensor connected to analog input port:A0 

// Note: How to read the leaf sensor signal val
// Leaf Sensor Not Affixed (NA) is the highest %. 
// The Affixed (A) % is less than NA. 
// Thus (A%<NA%) or (Aval<NAval) means more water in the leaf i.e.(thicker leaf). 

 //Notes: 
 // The arduinos analog inputs have a 10-bit resolution. 2^10 (converting to decimal system) = 1024

 // So that's 1024 states, divided in the range 0-5V. 5V / 1024 states = 0,00488V/state (4.88mV/state).
 // The leaf range is approximately 1.45 to 2.21V @3.3V = 0.77V or 157 states @ 4.88mV ea.
  

 // Basically means that when you read the arduinos analog inputs you'll get a value between 0 and 1023. 
 // Each increase in this value signifies rougly a 4.88mV increase in the voltage measured.
 
 
 
 // for educational use only - contribution by AgriHouse.com copyright 2014