Build a Smart IoT Jar with ESP8266, Arduino & Ultrasonic Sensor – Real‑Time Monitoring

Apps and online services

Arduino IDE

About this project

Make your kitchen look awesome! Make this project to give to your mom the real-time data values of her secret recipes.

Hello to all! Thanks for viewing our tutorial. In this tutorial, we will show you the steps for making a prototype like this. Here we are creating a database in a localhost server. A link is made to communicate the ESP8266 to the DB through PHP script. And the details are displayed in another PHP script. Please download the images and view it properly, because we have provided photos so you can see it offline, too. Happy learning!

Step 1:

Things Needed For Making a Smart Jar

As explained in the introduction, this product is a basic prototype. It doesn't require costly elements. The following are the things and software needed to make this! Happy DIYing !

Components:

• Arduino UNO

• Ultrasonic sensor

• An empty jar (plastic or transparent is recommended)

• Breadboard

• The main guy - ESP8266 (WiFi module)

• Jumper wires (~15 - 20)

• Program loading cable

• Resistors (2K) - 2 Nos

Software:

• Arduino IDE

• Sublime Text or Notepad ++

• Apache Server or any hosted server

• MYSQL Database

Step 2:

ESP 8266 and Ultrasonic Sensor Connection

The above image will clearly explain the connections for the ESP8266 and ultrasonic sensor with Arduino .

Step 3:

Programming Arduino For ESP and Bluetooth

• Github Link

Softwares Used

• Notepad++

• XAMPP Server

• Arduino IDE

#include <SoftwareSerial.h>
SoftwareSerial esp(2, 3);
long duration ; 
int distance;
void setup() { 
// put your setup code here, to run once: 
Serial.begin(9600);
esp.begin(9600); 
esp.println("AT"); 
response(3000); 
esp.println("AT+CIOBAUD=9600"); 
response(1000); 
esp.println("AT+CWMODE=1"); 
response(2000);
esp.println("AT+CWJAP=\"Wifi Name SSID \",\"Wifi Password\""); 
response(10000); 
pinMode(9,OUTPUT); 
pinMode(10,INPUT); 
}
void loop() { 
// put your main code here, to run repeatedly:
digitalWrite(9,LOW);
delayMicroseconds(2);
digitalWrite(9,HIGH); 
delayMicroseconds(10);
digitalWrite(9,LOW); 
duration = pulseIn(10,HIGH); 
distance = duration*0.034/2; 
esp.println("AT+CIPSTART=\"TCP\",\"Your IP Address\",80"); 
response(5000); 
esp.println("AT+CIPSEND=80"); 
response(2000); 
esp.print("GET Your Link with the IP address You Used "); 
esp.print(distance);
esp.println("\r\nabcd1234"); 
response(5000);
}
void response(int waitTime) { 
for (int i = 0 ; i < waitTime; i++) 
{     if (esp.available() > 0) 
{       char x = esp.read(); 
Serial.print(x);
} 
delay(1); 
} }

Step 4:

Website Programming - Inserting Data

The above code is to be typed in Text Editor. It is the code for inserting data into the database.

Step 5:

Website Programming - Displaying Data

Please refer to the image for the code of displaying values.

Step 6:

Setting Up the Database - I have Used PHPMyAdmin Panel

This is a general GUI. If you have doubts in SQL, feel free to email us at santhoshnarendra@gmail.com with subject "Tutorial - Smart Jar".

Step 7:

Done! Time to Test

Please make sure you use the correct baud rate. If ESP8266 gives an error, we recommend you reset the baud rate properly. For any further inquiries, don't hesitate to email us. Thanks for following the steps. By the end of Feb 2017, we will put up a code for Android support, also a web Graphical UI! Stay Tuned! Hack a lot!

Project made by

• Narendra Santhosh N <santhoshnarendra@gmail.com>

• Ajay Karthik K <ajaykarthikkasinaathan14@gmail.com>

• Subash C

Code

IOT Smart Jar Code Files