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





Introduction: 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)

WiFly Shield ($89.95)

Grove - Moisture sensor ($4.99)

Six Jumper Wires ($4.50)

DS18B20 Temperature Sensor with metal tip ($10.59)

If only  need, One protoboar ($9.58)


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` (
`temp1` VARCHAR( 255 ) NOT NULL ,
`moi1` VARCHAR( 255 ) NOT NULL ,
PRIMARY KEY ( `id` )

Step 5: Preparing for PHP Files

You make three files:

In this file will connect to our database


function Conection(){
   if (!($link=mysql_connect("your_ipserver","your_user","your_pass")))  {
   if (!mysql_select_db("your_database",$link)){
   return $link;


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.


$Sql="insert into tempmoi (temp1,moi1)  values ('".$_GET["temp1"]."', '".$_GET["moi1"]."')";     
   header("Location: 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.


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


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

#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 );

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 );

client.print( "GET /add.php?");
client.print( temp );
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" );
delay( 5000 );

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

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

if ( ! {
//no more sensors on chain, 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.write(0x44,1); // start conversion, with parasite power on at the end

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

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


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

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

return TemperatureSum;



Step 7: And Now ... to Prove It !!

Now we will check in "insertareg.php" data sent over Wi-Fi to your Mysql database PHP THROUGH.

This project can use on your crops, it is easy to use and manipulate, with the background light.

Hope you liked this instructable, if they have questions do not hesitate to make.

Good luck : D

2 People Made This Project!


  • Planter Challenge

    Planter Challenge
  • Clocks Contest

    Clocks Contest
  • Casting Contest

    Casting Contest

We have a be nice policy.
Please be positive and constructive.




The data from sensor will upload automatically into the database ?


Did you use a remote server or did you work local.

Seems that all works fine except the GET command in the add.php.

Nothing comes in from my Wifi module.

(greekcell with RN171)

Any sug's ?



Hello! First of all, thank you for sharing this instructable! It is very useful and nice for starters such me.

However, can you please help me doing the same things with ESP8266, instead of WiFly?
Thank you in advance!

How to change the PHP code to work with an Access Database?


please help me how to store data from arduino to database in ultrasonic sensor


It does not work with my code. I meant it does not send the data to my local Mysql. Please kindly help. The code is here below:

#include <SPI.h>

#include <Ethernet.h>

#include <String.h>

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };

byte ip[] = {192,168,1,110}; //address of arduino

byte server[] = {192,168,1,1};//address of rooter

EthernetClient client;

float sensor = 0;

void setup() {


Ethernet.begin(mac, ip);


void loop() {

char comend =;

if(comend == 'a'){



sensor = sensor + 5;

client.print("GET /arduino/tempTest/templogin.php?");



Serial.print("Sensor = ");




}else {

Serial.println("Not connected...");





hello. I just want to asking about the connect.php. What do you mean by "your_ipserver" ?

6 replies

Hi, "your_ip server" is the address where you host the server MySQL. In this case, is "", to connect the localhost.

will you help me to use ethernet shield to do the same task...

None of these data will be used , if you are using phpMyAdmin , go to the tab " Estado Actual" ( as from image ) and in the section of server, have the direction of you need.

Captura de pantalla 2015-07-22 a las 11.37.33.png

hai. I'm having a problem with the arduino coding. It said as shown in the image:


This error is because you have not included the OneWire library, I recommend you download the version 2.0 from here:

Hi Camilo i got some problem, i got some error with ur arduino codes. Here the message :

Arduino: 1.6.6 (Windows 10), Board: "Arduino Nano, ATmega328"

In file included from C:\Program Files\Arduino\libraries\WiFly/SpiUart.h:7:0,

from C:\Program Files\Arduino\libraries\WiFly/WiFly.h:4,

from C:\Users\Documents\Arduino\Coba\Coba.ino:8:

C:\Program Files\Arduino\libraries\WiFly/_Spi.h:8:22: fatal error: WProgram.h: No such file or directory

#include <WProgram.h>


compilation terminated.

exit status 1

Error compiling.

This report would have more information with

"Show verbose output during compilation"

enabled in File > Preferences.

Hi XiongL. I think you need to set IP Address of your PHP Server (Web server + PHP + MySQL). In short means, in your ardunio, you will build a link address like this Obviously, vars "temp" and "sensorValue" will contain measured values from sensors. In the file add.php you will catch this data and then run code PHP to insert them in MySQL.

hi can tell me

Client client( "your_website", 80 );

your_website what should i put ?

i`m using arduino yun via wifi can use the same code as yours ?

Hi ,i use this code in arduino but nothin works

client.print(" GET / add.php?value=");

client.println( " HTTP/1.1");
client.println( "Host:" );
client.println( "Content-Type: application/x-www-form-urlencoded" );
client.println( "Connection: close" );


I need help regarding sending my sensor's values to database. I am unable to send the values instead variable to which i am passing these values is showing me zero at database.

I love u..., I'm many grateful! :D