How to use water level sensor with Arduino Uno.

This video is for educational purposes.In this video we will learn how to simply use water level sensor with Arduino Uno. The level is indicate by LED and Buzzer.

[renuka]

Tq so much brother for ur help, we got output of this project and tomorrow our project exam tq brother

[Vanidaz]

For anyone who has a problem same problem as me that only the green led is lighting and others not working. I fixed it, but my buzzer connector is d6 *In vid he used a passive buzzer for anyone who's new to arduino* Here is the code:

// Pin assignments
const int greenLED = 2;
const int yellowLED = 3;
const int redLED = 4;
const int buzzer = 6; // Buzzer moved to D6
const int waterSensor = A0; // Water sensor connected to A0

void setup() {
pinMode(greenLED, OUTPUT);
pinMode(yellowLED, OUTPUT);
pinMode(redLED, OUTPUT);
pinMode(buzzer, OUTPUT);
pinMode(waterSensor, INPUT);

Serial.begin(9600); // For Serial Monitor (optional)
}

void loop() {
int waterLevel = analogRead(waterSensor); // Read water sensor

// Print the sensor reading (optional)
Serial.print("Water Level: ");
Serial.println(waterLevel);

// Decision making based on water level reading
if (waterLevel < 200) {
// No water: All OFF
digitalWrite(greenLED, LOW);
digitalWrite(yellowLED, LOW);
digitalWrite(redLED, LOW);
digitalWrite(buzzer, LOW);
}
else if (waterLevel >= 200 && waterLevel < 300) {
// Low water: Green ON
digitalWrite(greenLED, HIGH);
digitalWrite(yellowLED, LOW);
digitalWrite(redLED, LOW);
digitalWrite(buzzer, LOW);
}
else if (waterLevel >= 300 && waterLevel < 330) {
// Medium water: Yellow ON
digitalWrite(greenLED, LOW);
digitalWrite(yellowLED, HIGH);
digitalWrite(redLED, LOW);
digitalWrite(buzzer, LOW);
}
else {
// High water: Red ON + Buzzer ON (when water level reaches 330 or higher)
digitalWrite(greenLED, LOW);
digitalWrite(yellowLED, LOW);
digitalWrite(redLED, HIGH);
digitalWrite(buzzer, HIGH);
}

delay(500); // Wait half a second before reading again
}

[mangermatilla]

Thank you...
Your Saved me in my Arduino Class

[aliasgarmurtazaarsiwala]

Thanks! Was very helpful for my class! Nice Video Dude 👍👍👍👍👍

[HoXDipannew]

Outstanding and helpful video dude 👍👍👍👍👍

[rdax]

Hi, this is for school project purposes only and I'd like to get some help in related to the idea that you demonstrated, Is it possible to use water level sensor and a temperature sensor together that will flash an LED or make a noise if the water gets to full or hot? If so, i would appreciate this as I'm just a beginner and really don't have an Idea how to do it, and is this possible to do with the exact components you are using?

[HoXDipannew]

Congratulations bro you have completed 400 subscribers😃😃

[Anuvarshney]

do we have to include any library ? or somthing in code ?

[khabyllmetiktokfbfunnyvide]

Thank you so much. This video is very important me.

[jaimecases]

Hi, this is for school project purposes only and I'd like to get some help in related to the idea that you demonstrated. Uhm Is it possible to use water level sensor to a water despenser that will automatically turn off when the cup is about to get full? If so, I'd like to ask a help from you. I'm just a beginner and I really don't have an Idea how to do it, and the deadline is about its due date, help me please.🙏🙏🙏🙏

[deviprasad]

Hi sir reply me soon i have to submit project tomorrow will that buzzer work / can I use soil moisture sensor

[Hf-ft]

what if just the first one is lighting up but all the steps were followed?

[Sanjay_ai_editx]

Firstly you use a component red in colour, what is the name for that component please

[Leo-zjyu]

can you please tell me how to print the reading in mm?

[labisha]

BRO PLEASE REPLY FOR THIS COMMENT BECAUSE I HAVE A PROBLEM IN MY PROJECT AND THIS WEEK ONLY I HAVE TO SHOW MY PROJECT IT IS VERY IMPORTANT...
FOR ME THE OUTPUT IS COMING BUT I HAVE TO CLICK THE RED RESET BUTTON FOR THE DETECTING OF WATER....
WHY IS THAT
CAN THAT BE BECAUSE I USE A COM 4 ARDUINO CAN THAT BE A
WITHOUT PRESSING THE RESET BUTTON, THE OUTPUT REMAINS THE SAME THAT IS THE
BUT IN YOUR VIDEO YOU ARE NOT PRESSING THE RESET RED BUTTON IN THE ARDUINO BUT DIRECTLY IT IS SENSING THE WATER AND GIVING THE

FOR EXAMPLE ONCE IF I KEEP THE WATER SENSOR LITTLE BIT TO THE WATER, THE FIRST LIGHT GLOWS BUT THEN WHEN I PUT THE SENSOR MORE DEEP INSIDE THE WATER, THE SAME FIRST LIGHT GLOWS AND IT DOES NOT CHANGE BUT WHEN I PRESS THE RED RESET BUTTON IN ARDUINO THE OUTPUT CHANGES AND IT DETECTS THE WATER AND IT SHOWS THE OUTPUT WHICH IS NEEDED BUT PROBLEM THAT WITHOUT CLICKING THE RED BUTTON THE OUTPUT WONT COME....
I HAVE TO KEEP ON PRESSING THE RED BUTTON NOT ONLY ONE TIME
I USED THE CORRECT CODE AND DID NOT EVEN EDIT THE CODE ALSO THE WIRING IS ALSO CORRECT I HAVE CROSSCHECKED BOTH THE CODE AND THE WIRING AND BOTH ARE CORRECT. I CROSSCHECKED MANY
CAN THIS BE BECAUSE OF THE COM 4 PROBLEM OR CAN THIS BE BECAUSE OF SOMETHING
PLEASE REPLY BECAUSE THIS IS VERY IMPORTANT

[OnyxEnigma-dk]

what to do if the leds aren't turning off after water level reduces?

[Yuhuhhuh]

Does water sensor can sense any liquid????

[srinukmalla]

Bro buzzer is continuously sounding.pls help me

[hammadrehman]

do we need a laptop after we have finished uploading the code to the device ?
and if we do, do we have to open arduino IDE or will it work without it?

[kuyaj]

What application your using that code?