Example Code for Arduino-Measure Liquid Flow

Hardware Preparation

DFRduino UNO R3
Water flow sensor
Jumper Wires

Software Preparation

Arduino IDE, Click to Download Arduino IDE from Arduino®

Wiring Diagram

Sample Code

/*!
 * @file  SEN0216.ino
 * @brief  This example reads Water flow sensor Sensor.
 * @copyright  Copyright (c) 2010 DFRobot Co.Ltd (http://www.dfrobot.com)
 * @license  The MIT License (MIT)
 * @author  berinie Chen <[email protected]>
 * @version  V1.0
 * @date  2016-3-13
 */

/***********Notice and Trouble shooting***************
  1.This code is tested on Arduino Uno.
 ****************************************************/

volatile double waterFlow;

void setup()
{
  Serial.begin(9600);  //baudrate
  waterFlow = 0;
  attachInterrupt(0, pulse, RISING);  //DIGITAL Pin 2: Interrupt 0
}

void loop()
{
  Serial.print("waterFlow:");
  Serial.print(waterFlow);
  Serial.println("   L");
  delay(500);
}

void pulse()   //measure the quantity of square wave
{
  waterFlow += 1.0 / 5880.0;
}

Key Installation Notes:
Use with a 6 mm hose for optimal performance.
Avoid exposure to corrosive liquids or chemicals.
Install vertically with a tilt of no more than 5°.
Keep liquid temperature below 120°C to prevent damage.