I am busy with my first Arduino project and i have hit a brick wall, sort of. Took me half a day to get to this point but haven't progressed past it in a week. I don't want to just give up, and i know the solution to my problem will be simple. I just cant figure it out.
Aurduino Uno R3 - (connected to windows pc via usb)
Water Flow Meter – Plastic 1/2 inch Hall sensor - (Wiring diagram attached)
OLED 0.96" Display I2C White (SSD1306 OLED 128 x 64) - Wiring(GND - GND,VCC -3.3v,SCL-A5,SDA-A4)
I have followed a few wiring tutorials and i am pretty confident its been done properly.
I have (Adafruit_GFX) and (Adafruit_SSD1306) libraries installed.
I can get the display working without the flowmeter . I can get the flowmeter displaying in the serial window what i want it to display. Easy stuff.
Cant get the flowmeter to display on the Oled Display though.
Here is the code for Flowmeter:
volatile int NbTopsFan; //measuring the rising edges of the signal
int Calc;
int Calc2;
int Calc3;
int hallsensor = 2; //The pin location of the sensor
void rpm () //This is the function that the interupt calls
{
NbTopsFan++; //This function measures the rising and falling edge of signal
} //The setup() method runs once, when the sketch starts
void setup()
{
pinMode(hallsensor, INPUT); //initializes digital pin 2 as an input
Serial.begin(9600); //This is the setup function where the serial port is initialised
attachInterrupt(0, rpm, RISING); //and the interrupt is attached
}
// the loop() method runs over and over again
// as long as the Arduino has power
void loop ()
{
NbTopsFan = 0; //Set NbTops to 0 ready for calculations
sei(); //Enables interrupts
delay (1000); //Wait 1 second
cli(); //Disable interrupts
Calc = (NbTopsFan * 60 / 7.5); //(Pulse frequency x 60) / 7.5Q = flow rate in L/hour
Calc2 = (NbTopsFan * 60 / 7.5)/60; //(Pulse frequency x 60) / 7.5Q = flow rate in L/hour
Calc3 = (((NbTopsFan * 60 / 7.5)/60)/60)*1000; //(Pulse frequency x 60) / 7.5Q = flow rate in L/hour
Serial.print (Calc, DEC); //Prints the number calculated above
Serial.println (" L/hour"); //Prints "L/hour" and returns a new line
Serial.print (Calc2, DEC); //Prints the number calculated above
Serial.println (" L/min"); //Prints "L/min" and returns a new line
Serial.print(Calc3, DEC); //Prints the number calculated above
Serial.println (" ml/sec"); //Prints "ml/sec" and returns a new line
Serial.println("------"); //Prints the number calculated above
}
Here is the code for (SSD1306 OLED 128 x 64 ) with the flowmeter code.
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);
#define NUMFLAKES 10
#define XPOS 0
#define YPOS 1
#define DELTAY 2
#define LOGO16_GLCD_HEIGHT 64
#define LOGO16_GLCD_WIDTH 128
static const unsigned char PROGMEM logo16_glcd_bmp[] =
{ B00000000, B11000000,
B00000001, B11000000,
B00000001, B11000000,
B00000011, B11100000,
B11110011, B11100000,
B11111110, B11111000,
B01111110, B11111111,
B00110011, B10011111,
B00011111, B11111100,
B00001101, B01110000,
B00011011, B10100000,
B00111111, B11100000,
B00111111, B11110000,
B01111100, B11110000,
B01110000, B01110000,
B00000000, B00110000 };
#if (SSD1306_LCDHEIGHT != 64)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif
//------------------
volatile int NbTopsFan; //measuring the rising edges of the signal
int Calc;
int Calc2;
int Calc3;
int hallsensor = 2; //The pin location of the sensor
void rpm () //This is the function that the interupt calls
{
NbTopsFan++; //This function measures the rising and falling edge of signal
} //The setup() method runs once, when the sketch starts
void setup() {
Serial.begin(9600);
// by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // initialize with the I2C addr 0x3D (for the 128x64)
display.clearDisplay();
// init done
//--
pinMode(hallsensor, INPUT); //initializes digital pin 2 as an input
Serial.begin(9600); //This is the setup function where the serial port is initialised
attachInterrupt(0, rpm, RISING); //and the interrupt is attached
//--
}
void loop() {
NbTopsFan = 0; //Set NbTops to 0 ready for calculations
sei(); //Enables interrupts
delay (1000); //Wait 1 second
cli(); //Disable interrupts
Calc = (NbTopsFan * 60 / 7.5); //(Pulse frequency x 60) / 7.5Q = flow rate in L/hour
Calc2 = (NbTopsFan * 60 / 7.5)/60; //(Pulse frequency x 60) / 7.5Q = flow rate in L/hour
Calc3 = (((NbTopsFan * 60 / 7.5)/60)/60)*1000; //(Pulse frequency x 60) / 7.5Q = flow rate in L/hour
Serial.print (Calc, DEC); //Prints the number calculated above
Serial.println (" L/hour"); //Prints "L/hour" and returns a new line
Serial.print (Calc2, DEC); //Prints the number calculated above
Serial.println (" L/min"); //Prints "L/min" and returns a new line
Serial.print(Calc3, DEC); //Prints the number calculated above
Serial.println (" ml/sec"); //Prints "ml/sec" and returns a new line
Serial.println("------"); //Prints the number calculated above
display.display();
delay(1000);
display.clearDisplay();
}
I know there is problems with this code, but i am still figuring it out.
I have never posted on a forum like this but i feel like i am barking up a forest of wrong tress at the moment.
Feel free to let me know if i made mistakes in the post or anything like that.
Thank you .
