/* Include the servo library to add servo-control functions:*/
// Create a servo "object", called servo1. Each servo object
// controls one servo (you can have a maximum of 12):
// Define the analog input pin to measure flex sensor position:
const int flexpin = 0;
// Use the serial monitor window to help debug our sketch:
// Enable control of a servo on pin 9:
int flexposition; // Input value from the analog pin.
int servoposition; // Output value to the servo.
// Read the position of the flex sensor (0 to 1023):
flexposition = analogRead(flexpin);
// Because the voltage divider circuit only returns a portion
// of the 0-1023 range of analogRead(), we'll map() that range
// to the servo's range of 0 to 180 degrees. The flex sensors
// we use are usually in the 600-900 range:
servoposition = map(flexposition, 745, 870, 90, 0);
servoposition = constrain(servoposition, 0, 180);
// Now we'll command the servo to move to that position:
// Because every flex sensor has a slightly different resistance,
// the 600-900 range may not exactly cover the flex sensor's
// output. To help tune our program, we'll use the serial port to
// print out our values to the serial monitor window:
Serial.print(" servo: ");
// Note that all of the above lines are "print" except for the
// last line which is "println". This puts everything on the
// same line, then sends a final carriage return to move to
// the next line.
// After you upload the sketch, turn on the serial monitor
// (the magnifying-glass icon to the right of the icon bar).
// You'll be able to see the sensor values. Bend the flex sensor
// and note its minimum and maximum values. If you replace the
// 600 and 900 in the map() function above, you'll exactly match
// the flex sensor's range with the servo's range.
delay(20); // wait 20ms between servo updates