Code for Interfacing Flex Sensor with Arduino and controlling an LED.

Arduino_Flex_Sensor_LED.ino

const int flexPin = A0; 
const int ledPin = 7; 

void setup() 
{ 
  Serial.begin(9600);
  pinMode(ledPin,OUTPUT);
} 

void loop() 
{ 
  int flexValue;
  flexValue = analogRead(flexPin);
  Serial.print("sensor: ");
  Serial.println(flexValue);
  
  if(flexValue>890)
     digitalWrite(ledPin,HIGH);
  else
    digitalWrite(ledPin,LOW);
  
  delay(20);
}