How It Works
Here's how the code works.
Libraries
First, you'll import the libraries needed including time, ssl, socketpool, wifi, and adafruit_requests for creating the connection to the bulb, adafruit_funhouse for all of the convenient functions for using the sensors, display, NeoPixels, and buttons on the FunHouse easily, and the adafruit_lifx library for specific bulb functions.
import time import ssl import socketpool import wifi import adafruit_requests from adafruit_funhouse import FunHouse import adafruit_lifx
WiFi Setup
Next, the code checks the secrets.py file for the WiFi credentials.
try:
from secrets import secrets
except ImportError:
print("WiFi and API secrets are kept in secrets.py, please add them there!")
raise
Color Variables
You can pick your standby and active (sensor has been "tripped") colors here. Note that these are hexidecimal color values formatted two ways for the bulb, which uses HTML style hex formatting, and the FunHouse DotStars, which use more standard hex code formatting.
default_bulb_color = "#002010" default_led_color = 0x002010 tripped_bulb_color = "#440044" tripped_led_color = 0x440044
Requests Session
Here the ESP32-S2 sets up a WiFi HTTP socket session.
wifi.radio.connect(ssid=secrets["ssid"], password=secrets["password"]) pool = socketpool.SocketPool(wifi.radio) http_session = adafruit_requests.Session(pool, ssl.create_default_context())
LIFX Setup
Next you'll set up the LIFX bulb using your token from the secrets.py file, the bulb name, and the http session. The lights variable is set by querying the LIFX light list.
lifx_token = secrets["lifx_token"] lifx_light = "label:Lamp" lifx = adafruit_lifx.LIFX(http_session, lifx_token) lights = lifx.list_lights()
FunHouse Setup
The FunHouse object is created, setting a background color for the screen and a text scale of 3 and the DotStars are turned on to their default color.
Three variables are created to store the PIR sensor state, the running/paused state, and the initial on timer value.
funhouse = FunHouse(default_bg=0x000F20, scale=3) pir_state = 0 running_state = False trip_time = 30 # seconds to stay tripped, adjust this with buttons while running funhouse.peripherals.dotstars.fill(default_led_color)
Text Display
Next the screen labels are set up, including a function for toggling label colors when buttons are pressed.
def set_label_color(conditional, index, on_color):
if conditional:
funhouse.set_text_color(on_color, index)
else:
funhouse.set_text_color(0x606060, index)
# Create the labels
funhouse.display.show(None)
up_label = funhouse.add_text(text="+", text_position=(3, 6), text_color=0x606060)
down_label = funhouse.add_text(text="-", text_position=(3, 40), text_color=0x606060)
running_label = funhouse.add_text(
text="paused", text_position=(2, 68), text_color=0x606060
)
time_label = funhouse.add_text(
text=trip_time, text_scale=2, text_position=(30, 25), text_color=0x606060
)
funhouse.display.show(funhouse.splash)
Turn on the Light
The final step of setup is to turn on the LIFX bulb with a brightness of 65% and the default teal color.
lifx.toggle_light(lifx_light)
light_brightness = 0.65
lifx.set_brightness(lifx_light, light_brightness)
lifx.set_color(
lifx_light, power="on", color=default_bulb_color, brightness=light_brightness
)
Main Loop
The main loop of the program does the following:
- When the top button is pressed, increase the timer variable and highlight the text
- When the middle button is pressed, decrease the timer variable and highlight the text
- When the bottom button is pressed toggle the
running_statevalue and swap the text - Watch for the PIR sensor value to change -- if the sensor is tripped, set the LIFX
set_colorand the DotStars to the "tripped" color, and then countdown the timer. When the timer runs down, return to the default color.
while True:
if funhouse.peripherals.button_up:
trip_time = trip_time + 1
funhouse.set_text(trip_time, time_label)
funhouse.set_text_color(0xFFFFFF, up_label)
time.sleep(0.2)
else:
funhouse.set_text_color(0x606060, up_label)
if funhouse.peripherals.button_sel:
trip_time = abs(trip_time - 1)
funhouse.set_text(trip_time, time_label)
funhouse.set_text_color(0xFFFFFF, down_label)
time.sleep(0.2)
else:
funhouse.set_text_color(0x606060, down_label)
if funhouse.peripherals.button_down:
if running_state is False: # it's currently paused, so unpause it
running_state = True # flip the state
funhouse.set_text("..prepping..", running_label)
time.sleep(6) # pause to get out of range
funhouse.set_text("sensing...", running_label)
else: # it's currently running, so pause it
running_state = False
funhouse.set_text("paused", running_label)
time.sleep(0.5)
# when sensor is tripped, set the color x amount of time
if running_state is True and funhouse.peripherals.pir_sensor and pir_state is 0:
funhouse.peripherals.dotstars.fill(tripped_led_color)
funhouse.set_text("tripped", running_label)
lifx.set_color(
lifx_light,
power="on",
color=tripped_bulb_color,
brightness=light_brightness,
)
prior_trip_time = trip_time # store the state of the trip time value
for _ in range(trip_time):
time.sleep(1)
trip_time = trip_time - 1
funhouse.set_text(trip_time, time_label)
pir_state = 1
trip_time = prior_trip_time # restore the trip time value
# return to default color
elif (
running_state is True and not funhouse.peripherals.pir_sensor and pir_state is 1
):
funhouse.peripherals.dotstars.fill(default_led_color)
funhouse.set_text("sensing...", running_label)
lifx.set_color(
lifx_light,
power="on",
color=default_bulb_color,
brightness=light_brightness,
)
funhouse.set_text(trip_time, time_label)
pir_state = 0
