#include <Servo.h>

Servo serv;

//Global variable
int pin = A0; //input Velostat pin
int pinServo = 9; //servo pin

float sensorVal;
float voltage;
float angle;
float weight;

//Calibration
//float scale = 54.54;

void setup() {
  Serial.begin(9600);
  serv.attach(pinServo); //attach servo pin

  pinMode(pin,INPUT_PULLUP); 
  digitalWrite(pin, HIGH);
}

void loop() {
  sensorVal = analogRead(pin);
  voltage = sensorVal * (5.0 / 1023.0); //Convert the sensor value to output voltage
  
  angle = map(voltage, 0, 3.3, 0, 180);
  //angle = voltage*scale; //calculating the angular value

  weight = 3.304-voltage/0.436; //calculating weight using calibration curve equation

  //Serial Printing
  Serial.print(sensorVal);
  Serial.print(" , ");
  Serial.print(voltage);
  Serial.print(" , ");
  Serial.print(angle);
  Serial.print(" , ");
  Serial.println(weight);
  

  serv.write(angle);
  delay(500);
}