Hi there,
I'm on a small project with a hall sensor and an Oled I2C
When I run the code on the Arduino, the Oled screen comes to live, but doesn't show what I expected to see.
How do I fix this problem? Has it something to do with the screen I'm using?
Here is the scheme:
And the code:
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#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
Adafruit_SSD1306 display(4);
float value=0;
float rev=0;
int rpm,count=0;
int oldtime=0;
int time;
void isr() //interrupt service routine
{
rev++;
count++;
}
void setup() {
display.begin(SSD1306_SWITCHCAPVCC,0x3C);
display.clearDisplay();
attachInterrupt(0,isr,RISING); //attaching the interrupt
}
void loop() {
delay(1000);
detachInterrupt(0); //detaches the interrupt
time=millis()-oldtime; //finds the time
rpm=(rev/time)*60000; //calculates rpm
oldtime=millis(); //saves the current time
rev=0;
attachInterrupt(0,isr,RISING);
display.clearDisplay();
display.setTextSize(2);
display.setCursor(0,0);
display.println("COUNT");
display.setCursor(70,0);
display.println(count);
display.setTextSize(3);
display.setTextColor(WHITE);
display.setCursor(34,20);
display.println("RPM:");
display.setTextSize(2);
display.setCursor(40,48);
display.println(rpm);
display.display();
}
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