Code:
#!/usr/bin/env python3
import os
import sys
import time
import colorsys
import logging
import ST7735
import RPi.GPIO as GPIO
from sys import exit
from PIL import Image
from PIL import ImageDraw
from PIL import ImageFont
from subprocess import PIPE, Popen
from fonts.ttf import RobotoMedium as UserFont
try:
from smbus2 import SMBus
except ImportError:
from smbus import SMBus
from bme280 import BME280
def Shutdown(channel):
os.system("sudo shutdown now -P")
time.sleep(30)
GPIO.setmode(GPIO.BCM)
GPIO.setwarnings(False)
GPIO.setup(24, GPIO.IN, pull_up_down = GPIO.PUD_UP)
GPIO.add_event_detect(24, GPIO.FALLING, callback = Shutdown, bouncetime = 2000)
logging.basicConfig(
format='%(asctime)s.%(msecs)03d %(levelname)-8s %(message)s',
level=logging.INFO,
datefmt='%Y-%m-%d %H:%M:%S')
logging.info("""Displays readings from BME280 sensor
Press Ctrl+C to exit!
""")
bme280 = BME280()
disp0 = ST7735.ST7735(
port=1,
cs=0,
dc=19,
backlight=5,
rotation=90,
spi_speed_hz=10000000
)
disp0.begin()
disp1 = ST7735.ST7735(
port=1,
cs=1,
dc=19,
backlight=6,
rotation=90,
spi_speed_hz=10000000
)
disp1.begin()
disp2 = ST7735.ST7735(
port=1,
cs=2,
dc=19,
backlight=13,
rotation=90,
spi_speed_hz=10000000
)
disp2.begin()
WIDTH = 160
HEIGHT = 80
img = Image.new('RGB', (WIDTH, HEIGHT), color=(0, 0, 0))
draw = ImageDraw.Draw(img)
path = os.path.dirname(os.path.realpath(__file__))
font_size = 20
font = ImageFont.truetype(UserFont, font_size)
message = ""
top_pos = 25
def display_text0(variable, data, unit):
values[variable] = values[variable][1:] + [data]
vmin = min(values[variable])
vmax = max(values[variable])
colours = [(v - vmin + 1) / (vmax - vmin + 1) for v in values[variable]]
message = "{}:{:.0f}{}".format(variable[:11],data,unit)
logging.info(message)
draw.rectangle((0, 0, WIDTH, HEIGHT), (255, 255, 255))
for i in range(len(colours)):
colour = (1.0 - colours[i]) * 0.6
r, g, b = [int(x * 255.0) for x in colorsys.hsv_to_rgb(colour, 1.0, 1.0)]
draw.rectangle((i, top_pos, i + 1, HEIGHT), (r, g, b))
line_y = HEIGHT - (top_pos + (colours[i] * (HEIGHT - top_pos))) + top_pos
draw.rectangle((i, line_y, i + 1, line_y + 1), (0, 0, 0))
draw.text((0, 0), message, font=font, fill=(0, 0, 0))
disp0.display(img)
def display_text1(variable, data, unit):
values[variable] = values[variable][1:] + [data]
vmin = min(values[variable])
vmax = max(values[variable])
colours = [(v - vmin + 1) / (vmax - vmin + 1) for v in values[variable]]
message = "{}:{:.0f}{}".format(variable[:11],data,unit)
logging.info(message)
draw.rectangle((0, 0, WIDTH, HEIGHT), (255, 255, 255))
for i in range(len(colours)):
colour = (1.0 - colours[i]) * 0.6
g, r, b = [int(x * 255.0) for x in colorsys.hsv_to_rgb(colour, 1.0, 1.0)]
draw.rectangle((i, top_pos, i + 1, HEIGHT), (r, g, b))
line_y = HEIGHT - (top_pos + (colours[i] * (HEIGHT - top_pos))) + top_pos
draw.rectangle((i, line_y, i + 1, line_y + 1), (0, 0, 0))
draw.text((0, 0), message, font=font, fill=(0, 0, 0))
disp1.display(img)
def display_text2(variable, data, unit):
values[variable] = values[variable][1:] + [data]
vmin = min(values[variable])
vmax = max(values[variable])
colours = [(v - vmin + 1) / (vmax - vmin + 1) for v in values[variable]]
message = "{}:{:.0f}{}".format(variable[:11],data,unit)
logging.info(message)
draw.rectangle((0, 0, WIDTH, HEIGHT), (255, 255, 255))
for i in range(len(colours)):
colour = (1.0 - colours[i]) * 0.6
g, r, b = [int(x * 255.0) for x in colorsys.hsv_to_rgb(colour, 1.0, 1.0)]
draw.rectangle((i, top_pos, i + 1, HEIGHT), (r, g, b))
line_y = HEIGHT - (top_pos + (colours[i] * (HEIGHT - top_pos))) + top_pos
draw.rectangle((i, line_y, i + 1, line_y + 1), (0, 0, 0))
draw.text((0, 0), message, font=font, fill=(0, 0, 0))
disp2.display(img)
last_page = 0
variables = ["Temperature",
"Humidity",
"Pressure"]
values = {}
for v in variables:
values[v] = [1] * WIDTH
mode = 0
F = 0
D = 0
while True:
if F < 161:
F = F + 1
elif F >= 161:
time.sleep(5)
D = D + 1
if mode == 0:
mode %= len(variables)
last_page = time.time()
unit = "C"
data = bme280.get_temperature()
display_text0(variables[mode], data, unit)
mode = 1
if mode == 1:
mode %= len(variables)
last_page = time.time()
unit = "%"
data = bme280.get_humidity()
display_text1(variables[mode], data, unit)
if D == 0:
mode = 2
elif D > 0 and D < 9:
mode = 0
elif D == 9:
mode = 2
D = 0
if mode == 2:
mode %= len(variables)
last_page = time.time()
unit = "mb"
data = bme280.get_pressure()
display_text2(variables[mode], data, unit)
mode = 0
# Last edited on Marct 4th 2021
# sudo pip3 install rv3028
# sudo pip3 install pimoroni-bme280 smbus
# curl https://get.pimoroni.com/st7735 | bash
# sudo pip3 install fonts
# sudo pip3 install font-roboto
# sudo nano /boot/config.txt
# add
# dtoverlay=spi1-3cs
# run crontab -e
# add
# @reboot python3 /home/pi/3LCD_THP.py &
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