HOME WATER MONITORING USING WATER FLOW SENSOR AND NODEMCU
Posted: Fri Jan 25, 2019 8:58 pmHello World!
I want to do a project about home water monitoring by using water flow sensor and NodeMCU as a controller. I have a basic code of count the water usage that i copied from esp8266 forum. But the coding only show the output value.
I want to add some code:
1) If reach 30 day or every month, the output value turn back to zero.
2) If Turn Off then On the NodeMCU, i want to get output value same as before i Turn Off the program.
Thanks!
Here's my code:
I want to do a project about home water monitoring by using water flow sensor and NodeMCU as a controller. I have a basic code of count the water usage that i copied from esp8266 forum. But the coding only show the output value.
I want to add some code:
1) If reach 30 day or every month, the output value turn back to zero.
2) If Turn Off then On the NodeMCU, i want to get output value same as before i Turn Off the program.
Thanks!
Here's my code:
Code: Select all
#define PULSE_PIN D2 //gpio4
#define LED_PIN D7 //gpio13
volatile long pulseCount=0;
float calibrationFactor = 4.5;
float flowRate;
unsigned int flowMilliLitres;
unsigned long totalMilliLitres;
float totalLitres;
unsigned long oldTime;
void ICACHE_RAM_ATTR pulseCounter()
{
pulseCount++;
}
void setup()
{
Serial.begin(9600);
pulseCount = 0;
flowRate = 0.0;
flowMilliLitres = 0;
totalMilliLitres = 0;
oldTime = 0;
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, HIGH); // We have an active-low LED attached
pinMode(PULSE_PIN, INPUT);
// pinMode(PULSE_PIN, INPUT_PULLUP);
// digitalWrite(PULSE_PIN, HIGH); ????
attachInterrupt(PULSE_PIN, pulseCounter, FALLING);
}
void loop()
{
if((millis() - oldTime) > 1000) // Only process counters once per second
{
detachInterrupt(PULSE_PIN);
flowRate = ((1000.0 / (millis() - oldTime)) * pulseCount) / calibrationFactor;
oldTime = millis();
flowMilliLitres = (flowRate / 60) * 1000;
totalMilliLitres += flowMilliLitres;
totalLitres = totalMilliLitres * 0.001;
unsigned int frac;
Serial.print("flowrate: ");
Serial.print(int(flowRate)); // Print the integer part of the variable
Serial.print("."); // Print the decimal point
frac = (flowRate - int(flowRate)) * 10;
Serial.print(frac, DEC) ; // Print the fractional part of the variable
Serial.print("L/min");
Serial.print(" Current Liquid Flowing: "); // Output separator
Serial.print(flowMilliLitres);
Serial.print("mL/Sec");
Serial.print(" Output Liquid Quantity: "); // Output separator
Serial.print(totalLitres);
Serial.println("L");
//Serial.print(totalMilliLitres);
//Serial.println("mL");
pulseCount = 0;
attachInterrupt(PULSE_PIN, pulseCounter, FALLING);
}
}