Interfacing Waterflow sensor with Bharat Pi

INTERFACING WATER FLOW  SENSOR USING BHARATHPI

 

Introduction of BHARATPI:

A single board architecture with compute, network and storage designed to build any IoT idea into a product. The board comes with a ESP32 Wroom 4MB memory + WiFi + Bluetooth + SD card slot. You can program the board using Arduino IDE or microPython. All ESP programs are compatible with Bharat Pi boards.

Introduction of  Water Flow Sensor:

The sensor comes with three wires: red (5-24VDC power), black (ground), and yellow (Hall effect pulse output). By counting the pulses from the output of the sensor, you can easily calculate the water flow rate. Each pulse is approximately 2.25 milliliters. Note this isn’t a precision sensor, and the pulse rate does vary a bit depending on the flow rate, fluid pressure, and sensor orientation. It will need careful calibration if better than 10% precision is required.

This sensor sits in line with your water line and contains a pinwheel sensor to measure how much liquid has moved through it. There’s an integrated magnetic hall effect sensor that outputs an electrical pulse with every revolution. The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry.

STEP 1:How Water Flow Sensor Works?

The working of the YFS201 water flow sensor is simple to understand. The water flow sensor works on the principle of hall effect. Hall effect is the production of the potential difference across an electric conductor when a magnetic field is applied in the direction perpendicular to that of the flow of current. The water flow sensor is integrated with a magnetic hall effect sensor, which generates an electric pulse with every revolution. Its design is in such a way that the hall effect sensor is sealed off from the water, and allows the sensor to stay safe and dry.

STEP 2:Water Flow Sensor Pinout

 

connect the sensor's red wire (VCC) to 5V on the ESP32.

Connect the sensor's black wire (GND) to GND on the ESP32.

Connect the sensor's yellow wire (signal) to a GPIO pin on the ESP32 (pin 33)

 

STEP 3:Requirements

·       Water Flow Sensor

·       Bharathpi Board

·       Connecting wires

      Arduino IDE

STEP 4:Interfacing Water Flow Sensor with Bharathpi

Connections:

Connect the VCC (or +) pin of the water flow sensor to the 5V output on the Bharatpi.

Connect the GND (or -) pin of the water flow sensor to the GND on the Bharatpi.

Connect the signal (S) pin of the water flow sensor to one of the digital pins on the Bharatpi.

STEP 5: Source code and Programming

const int flowSensorPin = 33; // Replace with the GPIO pin you are using

 

   volatile int flowCount = 0;

   unsigned long lastMillis = 0;

   float flowRate = 0.0;

 

   void IRAM_ATTR pulseCounter() {

     flowCount++;

   }

 

   void setup() {

     pinMode(flowSensorPin, INPUT_PULLUP);

     attachInterrupt(digitalPinToInterrupt(flowSensorPin), pulseCounter, RISING);

     Serial.begin(115200);

   }

 

   void loop() {

     unsigned long currentMillis = millis();

 

     if (currentMillis - lastMillis >= 1000) { // Update every 1 second

       detachInterrupt(digitalPinToInterrupt(flowSensorPin)); // Disable interrupts

       flowRate = (float)flowCount * 60.0 / 7.5; // Calculate flow rate (adjust the divisor based on your sensor's specifications)

       flowCount = 0;

       lastMillis = currentMillis;

       attachInterrupt(digitalPinToInterrupt(flowSensorPin), pulseCounter, RISING); // Re-enable interrupts

 Serial.print("Flow Rate: ");

       Serial.print(flowRate);

       Serial.println(" L/min");

     }

   }

GitHub link:https://github.com/PuneeethG/Sensor-Interfacing/blob/main/waterflowsensor/waterflowcensor.ino

 

STEP 6:Application

1.Home Water Consumption Monitoring: Water flow sensors are used to monitor water usage in homes, helping residents conserve water and detect leaks.

2.Industrial Process Control: They are essential in industries like manufacturing and chemical processing to control and optimize water flow in various processes.

3.Irrigation Systems: Water flow sensors ensure efficient irrigation by measuring and controlling the water flow in agricultural fields and gardens.

4.Aquariums: They are used to regulate water flow and maintain water quality in fish tanks and aquariums.

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