OK. I may make another thread for this, but this is what I'm doing to monitor flow.
I have an Arduino Nano.
I bought one of these displays, which works great:
http://a.co/d/h3OM41Q" onclick="window.open(this.href);return false;" rel="nofollow
I downloaded the library for talking to it from:
http://wiki.sunfounder.cc/index.php?tit ... 2C_LCD1602" onclick="window.open(this.href);return false;" rel="nofollow
Then I ordered two flowmeters from China:
http://a.co/d/0mHyZu6" onclick="window.open(this.href);return false;" rel="nofollow
And am talking to them using this library:
https://github.com/sekdiy/FlowMeter" onclick="window.open(this.href);return false;" rel="nofollow
I'm only using one flowmeter for the moment, and I haven't calibrated it yet.
Here is my code simulating the flow rates. Basically feeding random numbers to the flowmeter library:
Code: Select all
#include <FlowMeter.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
float a, b;
const byte rcPin = 2;
const byte pcPin = 3;
const unsigned long period = 1000;
const double cap = 10.0f; // l/min
const double kf = 21.0f; // Hz per l/min
LiquidCrystal_I2C lcd(0x27, 16, 2); // set the LCD address to 0x27 for a 16 chars and 2 line display
FlowSensorProperties MySensor = {cap, kf, {1, 1, 1, 1, 1, 1, 1, 1, 1, 1}};
FlowMeter rcMeter = FlowMeter(rcPin, MySensor);
FlowMeter pcMeter = FlowMeter(pcPin, MySensor);
void rcMeterISR() {
rcMeter.count();
}
void pcMeterISR() {
pcMeter.count();
}
/*********************************************************/
void setup()
{
Serial.begin(9600);
lcd.init(); //initialize the lcd
lcd.backlight(); //open the backlight
attachInterrupt(digitalPinToInterrupt(rcPin), rcMeterISR, RISING);
attachInterrupt(digitalPinToInterrupt(pcPin), pcMeterISR, RISING);
rcMeter.reset();
pcMeter.reset();
}
/*********************************************************/
void loop()
{
// simulate counts
long frequency = random(MySensor.capacity * MySensor.kFactor); // Hz
long period = random(3 * frequency, 5000); // ms
for (long i = 0; i < (long) ((float) period * (float) frequency / 1000.0f); i++) {
rcMeter.count();
}
//
delay(period);
rcMeter.tick(period);
pcMeter.tick(period);
// output some measurement result
Serial.println("FlowMeter - period: " + String(rcMeter.getCurrentDuration() / 1000.0f, 3) + "s, " +
"frequency: " + String(rcMeter.getCurrentFrequency(), 0) + "Hz, " +
"volume: " + rcMeter.getCurrentVolume() + "l, " +
"flow rate: " + rcMeter.getCurrentFlowrate() + "l/min, " +
"error: " + rcMeter.getCurrentError() + "%, " +
"total duration: " + rcMeter.getTotalDuration() / 1000.0f + "s, " +
"total volume: " + rcMeter.getTotalVolume() + "l, " +
"average flow rate: " + rcMeter.getTotalFlowrate() + "l/min, " +
"average error: " + rcMeter.getTotalError() + "%.");
//Serial.println("PC Currently " + String(pcMeter.getCurrentFlowrate()) + " l/min, " + String(pcMeter.getTotalVolume()) + " l total.");
lcd.setCursor(3, 0); // set the cursor to column 3, line 0
lcd.print("RC"); // Print a message to the LCD
lcd.setCursor(11, 0);
lcd.print("PC");
lcd.setCursor(2, 1); // set the cursor to column 2, line 1
a = (float)random(0, 100) / 100.0;
a = rcMeter.getCurrentFlowrate();
lcd.print(a); // Print a message to the LCD.
lcd.setCursor(10, 1);
b = (float)random(0, 100) / 100.0;
b = pcMeter.getCurrentFlowrate();
lcd.print(b);
}
/************************************************************/
