#remember to enable SPI in raspi-config > interfaces before you run this the first time

#How to wire the MCP3008:
#https://learn.adafruit.com/raspberry-pi-analog-to-digital-converters/mcp3008

#gpiozero about MCP3008: 
#https://gpiozero.readthedocs.io/en/stable/api_spi.html

#gpiozero tools to modify values:
#https://gpiozero.readthedocs.io/en/stable/_modules/gpiozero/tools.html

from gpiozero import MCP3008, PWMLED
from gpiozero.tools import clamped, smoothed, scaled
from time import sleep

ldr = MCP3008(channel=0, device=0)

led = PWMLED(17)

while True:
    reading = smoothed(ldr,3) #smooth samples
    
    value = scaled(reading, 0,1.0,0.01,0.5) #scale samples
    
    brightness = clamped(value,0,1.0) #clamp samples

    for i in brightness:
        if i < 0.15:
            i = 0
        print(i)
        led.value = i