Make sure your Pi is running the latest version of Raspbian and has the following Adafruit blinka and neopixel libraries installed.
- Prerequisite Pi Setup
- Updates for an existing Pi
sudo apt-get updatesudo apt-get upgrade
Library installation
sudo pip3 install adafruit-blinkasudo pip3 install adafruit-circuitpython-neopixel
This script is intended to turn on blue light in the morning for a four hour window, then turn the lights off for most of the day. In the evening, it will turn on red lights for a four hour window and then the LEDs will be turned off for the night. You can customize the timing, color and duration by modifying this script.
import datetime
import time
import board
import neopixel
pi_pin = board.D18
numpix = 144
brightness = 1.0
pixels = neopixel.NeoPixel(pi_pin, numpix, brightness=brightness)
# morning BLUE light hours
# BLUE light is stimulating
start_morning = "06:00:00"
end_morning = "10:00:00"
# evening RED light hours
# RED light is calming allows melatonin production to increase
start_night = "18:00:00"
end_night = "22:00:00"
color_change = False
while True:
date_string = datetime.datetime.now().strftime("%H:%M:%S" )
if date_string == start_morning:
color = (0, 0, 255)
color_change = True
elif date_string == end_morning:
color = (0, 0, 0)
color_change = True
elif date_string == start_night:
color = (255, 0, 0)
color_change = True
elif date_string == end_night:
color = (0, 0, 0)
color_change = True
else:
time.sleep(1)
# update neopixel strip with new colors
if color_change:
pixels.fill(color)
color_change = False
time.sleep(1)
