Here is my full python file. Keep in mind there is a Sense Hat, BME680, Si1145, DS3231 RTC and the LEDShim.
I use the Si1145 to measure the ambient light level and auto adjust the LED Shim and Sense Hat LED matrix brightness. In dark conditions they are both dimmed to half brightness. In sunlight they both go to full bright. In very bright sunlight the text on the Sense Hat LED matrix goes to all white text. Normally its colored based on conditions. Below zero c temps turn the temperature message blue for example. I find the Red and Blue text hard to see in very bright sunlight. I can also override the auto function with the Sense Hat joystick. The Sense Hat shows a repeating scrolling message or day, date, time, temp, humidity, pressure and UV index. It runs headless on a powerboost and lipo battery.
import time, datetime
import bme680
import SI1145.SI1145 as SI1145
import ledshim
import RPi.GPIO as GPIO
from sense_hat import SenseHat, ACTION_PRESSED, ACTION_HELD, ACTION_RELEASED
ledshim.set_clear_on_exit()
sense = SenseHat()
sense.set_rotation(180)
sense.set_imu_config(False, False, False)
sense.low_light = False
uvs = SI1145.SI1145()
sensor = bme680.BME680()
sensor.set_humidity_oversample(bme680.OS_2X)
sensor.set_pressure_oversample(bme680.OS_4X)
sensor.set_temperature_oversample(bme680.OS_8X)
sensor.set_filter(bme680.FILTER_SIZE_3)
sensor.set_gas_status(bme680.DISABLE_GAS_MEAS)
#sensor.set_gas_heater_temperature(320)
#sensor.set_gas_heater_duration(150)
#sensor.select_gas_heater_profile(0)
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(5, GPIO.IN, pull_up_down = GPIO.PUD_OFF)
s=(0.1) # scroll speed
w=(0) # color all white toggle
o=(165)
x=(2) #shutdown variable
m=(0)
def set_multiple_pixels(indexes, r, g, b):
for index in indexes:
ledshim.set_pixel(index, r, g, b)
def Shutdown(channel):
global x
x = (0)
def readvis():
vis = uvs.readVisible()
vis = (round(vis))
global w
global o
global m
if vis < 270 and m == (0):
sense.low_light = True
ledshim.set_brightness(0.5)
ledshim.show()
w = (0)
o = (165)
elif vis >= 270 and vis < 600 and m == (0):
sense.low_light = False
ledshim.set_brightness(1.0)
ledshim.show()
w = (0)
o = (165)
elif vis >= 600 and m == (0):
sense.low_light = False
ledshim.set_brightness(1.0)
ledshim.show()
w = (255)
o = (255)
# is really stick down
def pushed_up(event):
global m
if event.action == ACTION_PRESSED:
sense.low_light = True
ledshim.set_brightness(0.5)
ledshim.show()
m = (1)
# is really stick up
def pushed_down(event):
global m
if event.action == ACTION_PRESSED:
sense.low_light = False
ledshim.set_brightness(1.0)
ledshim.show()
m = (1)
#is really stick right
def pushed_left(event):
global w
global o
global m
if event.action == ACTION_PRESSED:
w = (255)
o = (255)
m = (1)
# is really stick left
def pushed_right(event):
global w
global o
global m
if event.action == ACTION_PRESSED:
w = (0)
o = (165)
m = (1)
def pushed_middle(event):
global m
if event.action == ACTION_PRESSED:
m = (0)
sense.stick.direction_up = pushed_up
sense.stick.direction_down = pushed_down
sense.stick.direction_left = pushed_left
sense.stick.direction_right = pushed_right
sense.stick.direction_middle = pushed_middle
GPIO.add_event_detect(5, GPIO.FALLING, callback = Shutdown, bouncetime = 2000)
while True:
readvis()
dateString = "%A %B %-d %-I:%M:%p"
msg = "It is %s" % (datetime.datetime.now().strftime(dateString))
sense.show_message(msg, scroll_speed=s, text_colour=(w, 255, 255))
if sensor.get_sensor_data():
t = (sensor.data.temperature)
t = (round(t))
if t <= 0:
tc = [w, w, 255] # Blue
elif t > 0 and t < 13:
tc = [255, 255, w] # Yellow
elif t >= 13 and t <= 25:
tc = [w, 255, w] # Green
else:
tc = [255, w, w] # Red
msg = "and %sc" % (t)
sense.show_message(msg, scroll_speed=s, text_colour=tc)
if t <= 0 and t >= -27:
ledshim.set_all(0, 0, 255) #Blue
M = (t * (-1))
ledshim.set_pixel(M, 255, 255, 255)
# B B B B B B B B B B B B B B B B B B B B B B B B B B B B
elif t > 0 and t <= 28: # Main
set_multiple_pixels(range(0,3), 255, 0, 0) #Red
set_multiple_pixels(range(3,16), 0, 255, 0) #Green
set_multiple_pixels(range(16,28), 255, 255, 0) #Yellow
M = (28 - t)
ledshim.set_pixel(M, 255, 255, 255)
# R R R G G G G G G G G G G G G G Y Y Y Y Y Y Y Y Y Y Y Y
elif t > 28: # Realy Hot
set_multiple_pixels(range(0,27), 255, 140, 0) #Orange
set_multiple_pixels(range(27,28), 255, 0, 0) #Red
M = (t - 56) * (-1)
ledshim.set_pixel(M, 255, 255, 255)
# O O O O O O O O O O O O O O O O O O O O O O O O O O O R
else:
set_multiple_pixels(range(0,3), 255, 255, 255) #Blue
set_multiple_pixels(range(3,28), 0, 255, 255) #Aqua
M = (56 + t)
ledshim.set_pixel(M, 255, 255, 255)
# B B B A A A A A A A A A A A A A A A A A A A A A A A A A
ledshim.show()
readvis()
if sensor.get_sensor_data():
h = (sensor.data.humidity)
h = (round(h))
if h < 0:
h = 0
if h > 100:
h = 100
if h < 30:
hc = [255, w, w] # Red
elif h >= 30 and h <= 60:
hc = [w, 255, w] # Green
elif h > 60 and h < 80:
hc = [255, 255, w] # Yellow
elif h >= 80:
hc = [255, w, w] # Red
msg = "with %s%% Humidity" % (h)
sense.show_message(msg, scroll_speed=s, text_colour=hc)
readvis()
if sensor.get_sensor_data():
p = (sensor.data.pressure)
p = round(p)
if p > 0 and p < 982:
pc = [255, w, w] # Red
msg = "- Barometer is Very Low @ %smb - Storm Watch" % (p)
sense.show_message(msg, scroll_speed=s, text_colour=pc)
elif p >= 982 and p < 1004:
pc = [255, 255, w] # Yellow
msg = "- Barometer is Low @ %smb - Possible Percipitation" % (p)
sense.show_message(msg, scroll_speed=s, text_colour=pc)
elif p >= 1004 and p < 1026:
pc = [w, 255, w] # Green
msg = "- Barometer is Mid Range @ %smb" % (p)
sense.show_message(msg, scroll_speed=s, text_colour=pc)
elif p >= 1026 and p < 1048:
pc = [w, w, 255] # Blue
msg = "- Barometer is High @ %smb" % (p)
sense.show_message(msg, scroll_speed=s, text_colour=pc)
elif p >= 1048:
pc = [255, w, w] # Red
msg = "- Barometer is Very High @ %smb - Expect Dry Conditions" % (p)
sense.show_message(msg, scroll_speed=s, text_colour=pc)
readvis()
uv = uvs.readUV()
u = uv/100
u = (round(u))
if u > 0 and u < 3:
msg = "- UV Index is Low @ %s" % (u)
sense.show_message(msg, scroll_speed=s, text_colour=(w, 255, w)) # Green
elif u >= 3 and u < 6:
msg = "- UV Index is Moderate @ %s" % (u)
sense.show_message(msg, scroll_speed=s, text_colour=(255, 255, w)) # Yellow
elif u >= 6 and u < 8:
msg = "- UV Index is High @ %s" % (u)
sense.show_message(msg, scroll_speed=s, text_colour=(255, o, w)) # Orange
elif u >= 8 and u < 11:
msg = "- UV Index is Very High @ %s" % (u)
sense.show_message(msg, scroll_speed=s, text_colour=(255, w ,w)) # Red
elif u >= 11:
msg = "- UV Index is Extreme @ %s" % (u)
sense.show_message(msg, scroll_speed=s, text_colour=(255, w, 255)) # Violet
#vis = uvs.readVisible()
#vis = (round(vis))
#msg = "and the VIS is %s" % (vis)
#sense.show_message(msg, scroll_speed=s, text_colour=(255, w, 255))
if x == 0:
sense.clear()
ledshim.clear()
ledshim.show()
os.system("sudo shutdown now -P")
time.sleep(30)
elif x == 1:
sense.clear()
ledshim.clear()
ledshim.show()
raise SystemExit
time.sleep(30)
# Last edited on July 20th 2018 LED Shim dim function added.
# run sudo crontab -e
# add
# @reboot python3 /home/pi/BMELED.py &
