Published April 22, 2020

Water Level Monitor with Raspberry pi

How to build a water level sensor for water tanks with a Raspberry pi ?

BeginnerFull instructions provided1 hour7,722

Things used in this project

Hardware components

Raspberry Pi 3 Model B

Raspberry Pi 3b

Ultrasonic Sensor - HC-SR04 (Generic)

Ultrasonic Sensor

Buzzer

Jumper wires (generic)

Jumper Wires

Story

Introduction

Hello everybody, I am Shafin, a member of Aiversity. I am going to share how to build a water level sensor for water tanks with a Raspberry pi. This project is going to help you to understand the working of Raspberry pi in detail. if you want the video project, it is below.

For the full project, visit http://aiversity.com/water-level-monitor-using-raspberry-pi/

Or, the written project is below

Extra Materials:

Bucket
Water Jug

Connections

Now let’s talk about the connections of the raspberry pi, ultrasonic sensor, and Buzzer.

Please follow the circuit diagram given below

Connections:

Ultrasonic sensor VCC to 5v of Raspberry Pi

Ultrasonic sensor Gnd to Gnd of Raspberry Pi

Trigger to GPIO 2

Echo to GPIO 3

Buzzer + to GPIO 4

Buzzer – to Gnd

Structure

· Attach a scale to the bucket.

· Next attach the buzzer and ultrasonic sensor to the scale

Code

Now you know the connections and the structure, let’s build the code.

1. Open the Thonny Python IDE

2. Download the Github code or from below:

-- https://github.com/Aiversity/Raspberry-Pi-projects-for-beginners/tree/master/Water%20Level%20Monitor%20Without%20Oled%20Display

3. Run the code.

Testing

Fill water in the bucket. When the distance of the ultrasonic sensor from the water is around 4 centimeters, the buzzer will beep, alerting the bucket is almost full.

If you have any queries, please ask at Shafin@Aiversity.com

To know more, visit Aiversity.com

Code

Ultrasonic Sensor Water Level

import RPi.GPIO as GPIO
import time


GPIO.setmode(GPIO.BCM)

TRIG = 2
ECHO = 3
i=0

GPIO.setup(TRIG ,GPIO.OUT)
GPIO.setup(ECHO,GPIO.IN)
GPIO.setup(4 ,GPIO.OUT)

GPIO.output(TRIG, False)
print("Starting.....")
time.sleep(2)

while True:
   GPIO.output(TRIG, True)
   time.sleep(0.00001)
   GPIO.output(TRIG, False)

   while GPIO.input(ECHO)==0:
      pulse_start = time.time()

   while GPIO.input(ECHO)==1:
      pulse_stop = time.time()

   pulse_time = pulse_stop - pulse_start

   distance = pulse_time * 17150
   print(round(distance, 2));

   time.sleep(1)
   
   if distance < 4:
       print("Water will overflow")
       GPIO.output(4, True);
       time.sleep(0.5)
       GPIO.output(4, False);
       time.sleep(0.5)
       GPIO.output(4, True);
       time.sleep(0.5)
       GPIO.output(4, False);
       time.sleep(0.5)
   else:
       GPIO.output(4, False);

Credits

shafin kothia

4 projects • 7 followers

I have been developing AIversity for robotics training and projects

Water Level Monitor with Raspberry pi

Things used in this project

Hardware components

Story

Schematics

Circuit Diagram

Code

Ultrasonic Sensor Water Level

Credits

shafin kothia

Comments

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Water Level Monitor with Raspberry pi

Water Level Monitor with Raspberry pi

Things used in this project

Hardware components

Story

Schematics

Circuit Diagram

Code

Ultrasonic Sensor Water Level

Credits

shafin kothia

Comments

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