Save Data of Temperature and Humidity on MySQL With Arduino Uno and Wifly

Hello guys, i make this instructable for the people that liked the electronics and the botanic, with this you have the data about the temperatura and the humidity of your orchard and register this in a data base MySQL.

For this proyect you need some knowledge of programing in PHP and MySQL, we will make three archive .php, but this I'll explain in the following steps.

Step 1: You Need This

For this project, you need:

Arduino UNO or similar board ($29.95)
http://www.sparkfun.com/products/11021

WiFly Shield ($89.95)
http://www.sparkfun.com/products/9954

Grove - Moisture sensor ($4.99)
http://www.seeedstudio.com/depot/grove-moisture-sensor-p-955.html?cPath=144_147

Six Jumper Wires ($4.50)
http://www.sparkfun.com/products/9387

DS18B20 Temperature Sensor with metal tip ($10.59)
http://www.olimex.cl/product_info.php?cPath=21_138&products_id=872&product__name=Breadborad_jumper_wire_pack

If only need, One protoboar ($9.58)
http://www.olimex.cl/product_info.php?currency=USD&products_id=170&product__name=Proto_Board_Bread_board

AND....

you need a server WEB, with PHP and database MySQL. I used the NAS of QNAP TS-110, is perfect for this project.

Step 2: Setting the Temperature Sensor and Humidity

DS18B20 sensor is connected as follows. The position pin of the sensor Grove

Step 3: Connecting All in Arduino

Now, we will connect the two sensors on the Arduino shield Wifly:

-For the temperature sensor, the pin order is: GND-VCC in 5v power - SIG in digital pin 3.

-For the Moisture sensor, the pin order is: GND - 3.3V VCC in power - SIG in the analog pin 0.

Step 4: Preparing the Database Mysql

In the query of NySQL you need put this code:

---------------------------------------------------------------------
CREATE TABLE `your_database`.`tempmoi` (
`id` INT( 255 ) NOT NULL AUTO_INCREMENT ,
`temp1` VARCHAR( 255 ) NOT NULL ,
`moi1` VARCHAR( 255 ) NOT NULL ,
PRIMARY KEY ( `id` )
) ENGINE = MYISAM ;
-------------------------------------------------------------------

Step 5: Preparing for PHP Files

You make three files:

conec.php
In this file will connect to our database

CODE:

<?php
function Conection(){
   if (!($link=mysql_connect("your_ipserver","your_user","your_pass"))) {
      exit();
   }
   if (!mysql_select_db("your_database",$link)){
      exit();
   }
   return $link;
}
?>

--------------------------------------------------------------------------------------------------------------------------------------------------------------------

add.php
This file allows us to send the data to our table "tempmoi" located in our database, where "temp1" is equivalent to the temperature data and "moi1" is equivalent to the humidity data. This file also allows us to Arduino send data to the base.

CODE:

<?php
   include("conec.php");
   $link=Conection();
$Sql="insert into tempmoi (temp1,moi1) values ('".$_GET["temp1"]."', '".$_GET["moi1"]."')";
   mysql_query($Sql,$link);
   header("Location: insertareg.php");
?>

--------------------------------------------------------------------------------------------------------------------------------------------------------------------

insertareg.php
In this file we can see all the data collected by the sensors and put into the database, in addition to add some data of moisture and temperature if necessary.

CODE:

<html>
<head>
   <title>Data of Sensor</title>
</head>
<body>
<h1>Data from the temperature and moisture sensors</h1>
<form action="add.php" method="get">
<TABLE>
<tr>
   <td>Temperature 1</td>
   <td><input type="text" name="temp1" size="20" maxlength="30"></td>
</tr>
<tr>
   <td>Moisture 1</td>
   <td><input type="text" name="moi1" size="20" maxlength="30"></td>
</tr>
</TABLE>
<input type="submit" name="accion" value="Grabar">
</FORM>
<hr>
<?php
   include("conec.php");
   $link=Conection();
   $result=mysql_query("select * from tempmoi order by id desc",$link);
?>
<table border="1" cellspacing="1" cellpadding="1">
      <tr>
         <td> Temperature 1 </td>
         <td> Moisture 1 </td>
       </tr>
<?php
   while($row = mysql_fetch_array($result)) {
printf("<tr><td>  %s </td><td>  %s  </td></tr>", $row["temp1"], $row["moi1"]);
   }
   mysql_free_result($result);
?>
</table>
</body>
</html>

--------------------------------------------------------------------------------------------------------------------------------------------------------------------

Step 6: Codes for the Arduino

To use this code requires the following libraries:

- OneWire librarie

- Wifly librarie
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Well, i will briefly explain the code for the arduino, use the client that offers us the shield Wifly to send the data entering the digital pin 3 and pin analogue 0, these are sent as a sentences to file "agregar.php" for this we use the client.print.

I must remember to modify the data written in bold in the code:

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

#ifndef __CREDENTIALS_H__
#define __CREDENTIALS_H__
char passphrase[] = "pass_WIFI"; //password Wi-Fi
char ssid[] = "name_WIFI"; //name Wi-Fi
#endif

#include
#include "WiFly.h"

int sensorPin = A0;
int sensorValue = 0;

int DS18S20_Pin = 3;
OneWire ds(DS18S20_Pin);

Client client( "your_server_web", 80 );

int looped = 1;

void setup()
{
Serial.begin( 9600 );
WiFly.begin();

if( !WiFly.join( ssid, passphrase ) )
{
Serial.println( "Association failed." );

while( 1 )
{
// Hang on failure.
}
}
}

void loop()
{

if( client.connect() )
{
sensorValue = analogRead(sensorPin);
float temp = getTemp();
Serial.println( temp );
Serial.println(sensorValue);

client.print( "GET /add.php?");
client.print("temp1=");
client.print( temp );
client.print("&&");
client.print("moi1=");
client.print( sensorValue );
client.println( " HTTP/1.1");
client.println( "Host: your_server_web" );
client.println( "Content-Type: application/x-www-form-urlencoded" );
client.println( "Connection: close" );
client.println();
client.println();
client.stop();
}
delay( 5000 );
}

float getTemp(){
//returns the temperature from one DS18S20 in DEG Celsius

byte data[12];
byte addr[8];

if ( !ds.search(addr)) {
//no more sensors on chain, reset search
ds.reset_search();
return -1000;
}

if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.println("CRC is not valid!");
return -1000;
}

if ( addr[0] != 0x10 && addr[0] != 0x28) {
Serial.print("Device is not recognized");
return -1000;
}

ds.reset();
ds.select(addr);
ds.write(0x44,1); // start conversion, with parasite power on at the end

byte present = ds.reset();
ds.select(addr);
ds.write(0xBE); // Read Scratchpad

for (int i = 0; i < 9; i++) { // we need 9 bytes
data[i] = ds.read();
}

ds.reset_search();

byte MSB = data[1];
byte LSB = data[0];

float tempRead = ((MSB << 8) | LSB); //using two's compliment
float TemperatureSum = tempRead / 16;

return TemperatureSum;

}

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------