The Pimoroni Enviro pHAT format board combines a BME280 temperature, pressure and humidity sensor, LTR559 light and proximity sensor, a microphone and small colour LCD.
The Enviro board comes packed in a neatly printed anti-static bag (I was too excited to photograph it before opening it up)
Here is an example program that displays the temperature, humidity, atmospheric pressure, lux level and the current time.
import ST7735
from PIL import Image, ImageDraw, ImageFont
from fonts.ttf import RobotoMedium as UserFont
from bme280 import BME280
import time
import datetime
import os
try:
# Transitional fix for breaking change in LTR559
from ltr559 import LTR559
ltr559 = LTR559()
except ImportError:
import ltr559
print("Starting")
bme280 = BME280()
display_angle = 270 # 90 for upside dow relative to screen print
# Set up the display
disp = ST7735.ST7735(
port=0,
cs=1,
dc=9,
backlight=12,
rotation=display_angle,
spi_speed_hz=10000000
)
# Initialize display.
disp.begin()
# Width and height to calculate text position.
WIDTH = disp.width
HEIGHT = disp.height
# Calculate text position
x = 5
y = 0
# Set up canvas and font
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)
small_font = ImageFont.truetype(UserFont, 16)
large_font = ImageFont.truetype(UserFont, 38)
text_colour = (255, 255, 255)
back_colour = (0, 50, 170)
def display_data():
temperature = bme280.get_temperature()
pressure = bme280.get_pressure()
humidity = bme280.get_humidity()
lux = ltr559.get_lux()
prox = ltr559.get_proximity()
draw.rectangle((0, 0, WIDTH, HEIGHT), back_colour)
draw.text((x, y), "{:04.1f}C".format(temperature), font=font, fill=text_colour)
draw.text((x, y+25), "{:04.1f}%".format(humidity), font=font, fill=text_colour)
draw.text((x, y+50), "{:4.0f}hPa".format(pressure), font=font, fill=text_colour)
# alternating seconds flash the colon separator
if int(time.time()) % 2 == 0:
draw.text((x+60,y), datetime.datetime.now().strftime("%H:%M"),
font=large_font,fill=text_colour)
else:
draw.text((x+60,y), datetime.datetime.now().strftime("%H %M"),
font=large_font,fill=text_colour)
draw.text((x+100,y+55),"{:05.02f}lx".format(lux), font=small_font,fill=text_colour)
disp.display(img)
# Main loop
while True:
#print(bme280.get_temperature())
display_data()
time.sleep(1)
