FSR sensor ( counter ) problem

Other Hardware Sensors
5

I was a bit surprised by this at first, but I get excellent results by treating an FSR exactly like a tact switch. The code below illustrates this, using a debounce library that I wrote. I have the FSR connected to A0, but it is used as a digital input; any digital or analog pin can be used. I use the AVR's internal pullup so no external resistors are required.

//Counter using a Force-Sensitive Resistor (FSR) as input.
//Connect the FSR from the designated pin to ground, with no
//pullup or pull-down resistors.
//Works with this FSR https://www.sparkfun.com/products/9376

#include <Button.h>              //http://github.com/JChristensen/Button
#define FSR_PIN A0               //connect fsr from this pin to ground
#define PULLUP true              //use the AVR's internal pullup resistor
#define INVERT true              //low level means fsr pressed
#define DEBOUNCE_TIME 50         //milliseconds

Button fsr = Button(FSR_PIN, PULLUP, INVERT, DEBOUNCE_TIME);
int counter;

void setup(void)
{
    Serial.begin(9600);
}

void loop(void)
{
    fsr.read();
    if (fsr.wasPressed()) {
        Serial.print(++counter, DEC);
        Serial.println(" steps");
    }
}