/*
  Reed Switch + Servo Example
  ---------------------------

  WIRING NOTES

  1. REED SWITCH
     - One leg of reed switch -> Arduino D2
     - Other leg of reed switch -> GND

     This code uses INPUT_PULLUP, so:
     - switch open   = HIGH
     - switch closed = LOW

     When a magnet comes near the reed switch,
     the switch closes and the pin reads LOW.

  2. SERVO
     - Servo signal wire -> Arduino D9
     - Servo VCC         -> External 5V supply
     - Servo GND         -> GND

  3. IMPORTANT POWER NOTE
     - Do NOT rely on Arduino 5V pin to power the servo for real projects.
     - Use an external 5V supply for the servo.
     - Connect Arduino GND and external supply GND together.

  4. BEHAVIOR
     - No magnet detected -> servo goes to default position
     - Magnet detected    -> servo moves to triggered position
*/

#include <Servo.h>

const int reedPin = 2;
const int servoPin = 9;

Servo sorterServo;

// Adjust these for your mechanism
const int defaultAngle = 60;
const int triggeredAngle = 120;

void setup() {
  pinMode(reedPin, INPUT_PULLUP);

  sorterServo.attach(servoPin);
  sorterServo.write(defaultAngle);

  Serial.begin(9600);
  Serial.println("Reed switch + servo system ready");
}

void loop() {
  int reedState = digitalRead(reedPin);

  // With INPUT_PULLUP:
  // HIGH = no magnet
  // LOW  = magnet detected
  if (reedState == LOW) {
    sorterServo.write(triggeredAngle);
    Serial.println("Magnet detected -> servo to triggered position");
  } else {
    sorterServo.write(defaultAngle);
    Serial.println("No magnet -> servo to default position");
  }

  delay(100);
}