# Project objective: Gradually move the servo arm to its min to max position (at 100 increments) and vice-versa
# Additional features: LED indicator, speed adjustment via potentiometer, real-time position display
#
# Hardware and connections used:
#   Servo GND to Raspberry Pi Pico GND
#   Servo V+ to Raspberry Pi Pico 3.3 V
#   Servo PWM pin to GPIO Pin 15
#   LED anode to GPIO Pin 14 (with a current-limiting resistor)
#   LED cathode to Raspberry Pi Pico GND
#   Potentiometer middle pin to ADC Pin 27, other pins to VCC and GND
# 
# Programmer: Adrian Josele G. Quional
# https://wokwi.com/projects/439073584985425921

from picozero import Servo, LED
from machine import ADC
from time import sleep

# Creating objects
servo = Servo(22)
led = LED(14)
pot = ADC(27)

# Function to move servo and blink LED at min and max positions
def move_servo_with_led():
    for position in range(0, 101):  # From 0 to 100%
        servo.value = position / 100  # Convert to 0.0 to 1.0
        print(f"Servo Position: {position}%")
        sleep(speed)
    led.on()
    sleep(0.5)
    led.off()

    for position in range(100, -1, -1):  # From 100% to 0%
        servo.value = position / 100  # Convert to 1.0 to 0.0
        print(f"Servo Position: {position}%")
        sleep(speed)
    led.on()
    sleep(0.5)
    led.off()

# Continuously move servo and adjust speed based on potentiometer
while True:
    pot_value = pot.read_u16()
    speed = (pot_value / 65535) * 0.02  # Map pot value to sleep time between 0 and 0.02 sec
    move_servo_with_led()