# Course: BUEL456C - Introduction to Raspberry Pi (VTU)
# Wokwi simulation: Potentiometer on GP26 simulates LDR

from machine import ADC, Pin
import time

adc    = ADC(Pin(26))     # potentiometer wiper on GP26
BRIGHT = 20000
DARK   = 45000

def classify(raw):
    if raw < BRIGHT:   return "BRIGHT"
    elif raw > DARK:   return "DARK"
    else:              return "MEDIUM"

def bar(raw):
    filled = int((raw / 65535) * 20)
    return "[" + "#" * filled + " " * (20 - filled) + "]"

print("=" * 50)
print("  LDR Simulation | Pico ADC | BUEL456C Wokwi")
print("=" * 50)

while True:
    raw     = adc.read_u16()
    voltage = raw * 3.3 / 65535
    pct     = (raw / 65535) * 100
    print(f"  Raw:{raw:6d} | {voltage:.3f}V | "
          f"{pct:5.1f}% | {bar(raw)} | {classify(raw)}")
    time.sleep(1)