OpenEnergyMonitor

I am trying to log this sketch onto a usb pen drive:

/* Arduino sketch for Inspeed Vortex windspeed instrument
The anemometer.

=========================================================
ANEMOMETER
=========================================================
This is connected to Arduino ground on one side, and pin 2 (for the
attachInterrupt(0, ...) on the other.
Pin 2 is pulled up, and the reed switch on the anemometer will send
that to ground once per revolution, which will trigger the interrupt.
We count the number of revolutions in 5 seconds, and divide by 5.
One Hz (rev/sec) = 2.5 mph.

*********************************************************************/

#define uint unsigned int
#define ulong unsigned long

#define PIN_ANEMOMETER 2 // Digital 2

// How often we want to calculate wind speed
#define MSECS_CALC_WIND_SPEED 5000

volatile int numRevsAnemometer = 0; // Incremented in the interrupt
ulong nextCalcSpeed; // When we next calc the wind speed
ulong time; // Millis() at each start of loop().

//=======================================================
// Initialize
//=======================================================
void setup() {
Serial.begin(9600);
pinMode(PIN_ANEMOMETER, INPUT);
digitalWrite(PIN_ANEMOMETER, HIGH);
attachInterrupt(0, countAnemometer, FALLING);
nextCalcSpeed = millis() + MSECS_CALC_WIND_SPEED;
}

//=======================================================
// Main loop.
//=======================================================
void loop() {
time = millis();

if (time >= nextCalcSpeed) {
calcWindSpeed();
nextCalcSpeed = time + MSECS_CALC_WIND_SPEED;
}
}

//=======================================================
// Interrupt handler for anemometer. Called each time the reed
// switch triggers (one revolution).
//=======================================================
void countAnemometer() {
numRevsAnemometer++;
}

//=======================================================
// Calculate the wind speed, and send to serial port.
// 1 rev/sec = 2.5 mph
//=======================================================
void calcWindSpeed() {
int x, iSpeed;
// This will produce mph * 10
// (didn't calc right when done as one statement)
long speed = 25000;//2.5 mph * 1000
speed *= numRevsAnemometer;
speed /= MSECS_CALC_WIND_SPEED;
iSpeed = speed; // Need this for formatting below

Serial.print("Wind speed: ");
x = iSpeed / 10;
Serial.print(x);
Serial.print('.');
x = iSpeed % 10;
Serial.print(x);
Serial.print(" mph");

numRevsAnemometer = 0; // Reset counter
}

But I cannot get it working, do you have any advice ?