// test1: gradual change in brightness

int sensorPin = A0;
int sensorReading = 0;
int ledPin = D1;
int ledBrightness = 0;

void setup() {
  pinMode(ledPin, OUTPUT);
  Particle.variable("Flexure", &sensorReading, INT);
  Particle.variable("Brightness", &ledBrightness, INT);
}


void loop()
{
  sensorReading = analogRead(sensorPin);
  ledBrightness = map(sensorReading, 3350, 4095, 255, 0);
  analogWrite(ledPin, ledBrightness);
  delay(100);
}