In the previous water meter Blogs we used a cheap flow meter to give us a measure of water flowrate and total water used. The flow meters are cheap and the spec sheet can be misleading, this code is used to get a real world value of number of pulses per L of water delivered.
>Connect the water meter in-line, and prime system
>Turn tap off
>Start Arduino
>Turn tap on to fill up a known volume
Clicks per L= Volume/Pulse Count [Volume must be in L]
We can use this value in our previous code to get really accurate readings
LCD Shiled that it will work with:
Pinout [Solder onto LCD shiled is preferred ] :
Ignore external pull up, we are doing that in software instead
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/* This script is used to make sense of the output from a hall effect water flow meter for calibration Calibrating Water Meters: >Load Calibration Code >Connect the water meter in-line, and prime system >Turn tap off >Start Arduino >Turn tap on to fill up a known volume Clicks per L= Volume/Pulse Count [Volume must be in L] We can use this value in our previous code to get really accurate readings
Michael Ratcliffe Mike@MichaelRatcliffe.com
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
Components: See main folder for sensor data sheets, required liabaries and extra information: [can be downloaded via www.michaelratcliffe.com]
All power systems should be powerd of DC voltage of below 48v for safter [water is around] 12v is prefferable and cheapest. As always this is a DIY project and done at your own risk.
>Arduino Uno >Hall Effect Water Flow Meter 5v >LCD button Shield [Hobby tronix]
*/ // including some libraries for interfacing with harware #include <LiquidCrystal.h> //Standard LCD Lbrary
#define Water_pin 2 #define Relay A2
//*********************8* Setting up LCD ************************// // select the pins used on the LCD panel LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
//***************************** End Of User Defined Variables **************************************************//
unsigned long PulseCount=0; //counter for water meter pulses
//**************************** Setup Routine , Runs Once and Sets used pins to correct value *******************// void setup() { //Stoping noise from being a problem, pin is high untill hall sensor pulls it low pinMode(Water_pin, INPUT); digitalWrite(Water_pin, HIGH);// saves having an external pullup
//External Interrupts: This is what the watr meter pulse count is collected from attachInterrupt(0, WaterCounter, FALLING); //watermeter pulse output connected to pin2 lcd.begin(16, 2); // start the library lcd.setCursor(0,0); lcd.print(" "); delay(3); lcd.setCursor(1,1); lcd.print(" ");
};
//************************************** Main Loop that will continualy run ******************************************// void loop(){
lcd.setCursor(0,0); lcd.print("Pulse_Count: ");
lcd.setCursor(0,1); lcd.print(PulseCount);
delay(300); //just a short delay to let things settle };
//*************Interupt routine for water meter readings - Runs everytime sensor has a pulse *************//
void WaterCounter() {
// Increment the pulse counter PulseCount++;
}; |
