Step 5: Simple code for analog FSR measurements

Picture of Simple code for analog FSR measurements

This code doesn't do any calculations, it just prints out what it interprets as the amount of pressure in a qualitative manner. For most projects, this is pretty much all that's needed!

/* FSR simple testing sketch.

Connect one end of FSR to power, the other end to Analog 0.
Then connect one end of a 10K resistor from Analog 0 to ground

For more information see www.ladyada.net/learn/sensors/fsr.html */

int fsrPin = 0; // the FSR and 10K pulldown are connected to a0
int fsrReading; // the analog reading from the FSR resistor divider

void setup(void) {
// We'll send debugging information via the Serial monitor

void loop(void) {
fsrReading = analogRead(0);

Serial.print("Analog reading = ");
Serial.print(fsrReading); // the raw analog reading

// We'll have a few threshholds, qualitatively determined
if (fsrReading < 10) {
Serial.println(" - No pressure");
} else if (fsrReading < 200) {
Serial.println(" - Light touch");
} else if (fsrReading < 500) {
Serial.println(" - Light squeeze");
} else if (fsrReading < 800) {
Serial.println(" - Medium squeeze");
} else {
Serial.println(" - Big squeeze");
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