Test of new anemometer hardware with Feather RP2040 and Arduino code

feather_rp2040.ino

// Based on https://how2electronics.com/interfacing-anemometer-npn-pulse-output-with-arduino/

unsigned long DEBOUNCE_DELAY = 1000;    // the debounce time; increase if the output flickers
int PIN_INTERRUPT = 25;

unsigned long lastDebounceTime_ = 0;  // the last time the output pin was toggled
int count_ = 0;
int iter_ = 0;


void onChange()
{
  if (digitalRead(PIN_INTERRUPT) == LOW)
    count_++;
}


void setup()
{
  Serial.begin(115200); // Initialize serial port
  Serial.println("Hello, Cran!");

  pinMode(PIN_INTERRUPT, INPUT_PULLUP); // set the interrupt pin
 
  // Enable interrupt
  attachInterrupt(digitalPinToInterrupt(PIN_INTERRUPT), onChange, FALLING);

}
 
void loop()
{
  if ((millis() - lastDebounceTime_) > DEBOUNCE_DELAY)
  {
    lastDebounceTime_ = millis();
    
    iter_++;

  // for console:
    // Serial.print(iter_);
    // Serial.print(": ");
    // Serial.print((count_ * 8.75)/100);
    // Serial.println(" m/s");
    
  // for plotter:
    Serial.print("Wind_Speed:");
    Serial.println((count_ * 8.75)/100);

    count_ = 0;
  }

  delay(1);
}