- Arduino Uno with USB cable - 1
- ESP8266 Wi-Fi module - 1
- HC-SR04 Ultrasonic sensor - 1
- 1K Resistors - 5
- Breadboard 400 points - 1
- Jumper wire male to female- 40 pcs
- Jumper wire male to male- 40 pcs
HARDWARE REQUIRED
- Arduino Uno with USB cable - 1
- ESP8266 Wi-Fi module - 1
- HC-SR04 Ultrasonic sensor - 1
- 1K Resistors - 5
- Breadboard 400 points - 1
- Jumper wire male to female- 40 pcs
- Jumper wire male to male- 40 pcs
SOFTWARE REQUIRED
Arduino IDE 1.8.5 (programmable platform for Arduino)
Click To Download :https://www.arduino.cc/en/Main/Software
SPECIFICATIONS
HC SR04 ULTRASONIC SENSOR
The Ultrasonic Sensor is used to measure the distance with high accuracy and stable readings. It can measure the distance from 2cm to 400cm or from 1 inch to 13 feet. It emits an ultrasound wave at the frequency of 40KHz in the air and if the object will come in its way then it will bounce back to the sensor. By using that time which it takes to strike the object and comes back, you can calculate the distance.
The ultrasonic sensor has four pins. Two are VCC and GND which will be connected to the 5V and the GND of the Arduino while the other two pins are Trig and Echo pins which will be connected to any digital pins of the Arduino. The trig pin will send the signal and the Echo pin will be used to receive the signal. To generate an ultrasound signal, you will have to make the Trig pin high for about 10us which will send an 8 cycle sonic burst at the speed of sound and after striking the object, it will be received by the Echo pin.
Further, check projects to properly understand the working of the Ultrasonic sensor and to measure the distance of any object using it.
- Operating Voltage: 5V
- Static current: 2mA max
- Induction Angle: 15°
- Detection Range: 2 – 200cm
- High precision up to 3mm
ESP8266 WIFI MODULE
ESP8266 is a Wi-Fi module that will give your project's access to Wi-Fi or the internet. It is a very cheap device but it will make your projects very powerful. It can communicate with any microcontroller and make the project's wireless. It is in the list of most leading devices in the IoT platform. It runs on 3.3V and if you will give it 5V then it will get damaged.
The ESP8266 has 8 pins; the VCC and CH-PD will be connected to the 3.3V to enable the wifi. The TX and RX pins will be responsible for the communication of ESP8266 with the Arduino. The RX pin works on 3.3V so you will have to make a voltage divider for it as we made in our project.
CIRCUIT CONNECTION
First of all we will connect the ESP8266 with the Arduino. ESP8266 runs on 3.3V and if you will give it 5V from the Arduino then it won’t work properly and it may get damaged. Connect the VCC and the CH_PD to the 3.3V pin of Arduino. The RX pin of ESP8266 works on 3.3V and it will not communicate with the Arduino when we will connect it directly to the Arduino. So, we will have to make a voltage divider for it. Three 1k resistors connected in series will do the work for us. Connect the RX to the pin 11 of the Arduino through the resistors as shown in the figure below and also the TX of the Arduino to the pin 10 of the Arduino.
Now it’s time to connect the HC-SR04 ultrasonic sensor with the Arduino. Connections of the ultrasonic sensor with the Arduino are very simple. Connect the VCC and the ground of the ultrasonic sensor to the 5V and the ground of the Arduino. Then connect the TRIG and ECHO pin of the ultrasonic sensor to the pin 8 and 9 of the Arduino respectively.
CODE
WORKING
After uploading the code, open the Serial Monitor and it will show you an IP address as shown below.
Type this IP address in your browser, it will show you the output as shown below. You will have to refresh the page again if you want to see again that the trash can is empty or not.
So this how this Garbage Monitoring System works, this project can be further enhanced by adding few more features in it like we can set one more message when the Trash Can is half-filled or we can trigger an Email/SMS to alert the user when Trash Basket is full.
In this IOT Project, an Ultrasonic Sensor is used for detecting whether the trash can is filled with garbage or not. Here Ultrasonic Sensor is installed at the top of Trash Can and will measure the distance of garbage from the top of the Trash can and we can set a threshold value according to the size of the trash can. If the distance will be less than this threshold value, means that the Trash can is full of garbage and we will print the message “Basket is Full” on the webpage and if the distance will be more than this threshold value, then we will print the message “Basket is Empty”. Here we have set the Threshold value of 5cm in the Program code. We will use the ESP8266 Wi-Fi module for connecting the Arduino to the webserver. Here we have used Localwebserver to demonstrate the working of this Garbage Monitoring System.