From: Philip Howard Date: Thu, 4 Jun 2020 14:29:44 +0000 (+0100) Subject: Merge pull request #69 from piofthings/master X-Git-Url: https://zdv2.bktei.com/gitweb/EVA-2020-02-2.git/commitdiff_plain/6c6e55301f85a23a4d393cf5244f0f5ba441e309?hp=f3e6204d564e95ac83bda4bcfa97f94ca1adddda Merge pull request #69 from piofthings/master Added supported board images and an example --- diff --git a/Enviro-Plus-pHAT.jpg b/Enviro-Plus-pHAT.jpg new file mode 100644 index 0000000..f0947a0 Binary files /dev/null and b/Enviro-Plus-pHAT.jpg differ diff --git a/Enviro-mini-pHAT.jpg b/Enviro-mini-pHAT.jpg new file mode 100644 index 0000000..120469f Binary files /dev/null and b/Enviro-mini-pHAT.jpg differ diff --git a/README.md b/README.md index 5fb9fe6..843de1f 100644 --- a/README.md +++ b/README.md @@ -1,7 +1,8 @@ -# Enviro+ +# Enviro+ Designed for environmental monitoring, Enviro+ lets you measure air quality (pollutant gases and particulates), temperature, pressure, humidity, light, and noise level. Learn more - https://shop.pimoroni.com/products/enviro-plus + [![Build Status](https://travis-ci.com/pimoroni/enviroplus-python.svg?branch=master)](https://travis-ci.com/pimoroni/enviroplus-python) [![Coverage Status](https://coveralls.io/repos/github/pimoroni/enviroplus-python/badge.svg?branch=master)](https://coveralls.io/github/pimoroni/enviroplus-python?branch=master) [![PyPi Package](https://img.shields.io/pypi/v/enviroplus.svg)](https://pypi.python.org/pypi/enviroplus) @@ -11,6 +12,11 @@ Designed for environmental monitoring, Enviro+ lets you measure air quality (pol You're best using the "One-line" install method if you want all of the UART serial configuration for the PMS5003 particulate matter sensor to run automatically. +**Note** The code in this repository supports both the Enviro+ and Enviro Mini boards. _The Enviro Mini board does not have the Gas sensor or the breakout for the PM sensor._ + +![Enviro Plus pHAT](./Enviro-Plus-pHAT.jpg) +![Enviro Mini pHAT](./Enviro-mini-pHAT.jpg) + ## One-line (Installs from GitHub) ``` diff --git a/examples/all-in-one-enviro-mini.py b/examples/all-in-one-enviro-mini.py new file mode 100755 index 0000000..d7a001f --- /dev/null +++ b/examples/all-in-one-enviro-mini.py @@ -0,0 +1,166 @@ +#!/usr/bin/env python3 + +import time +import colorsys +import os +import sys +import ST7735 +try: + # Transitional fix for breaking change in LTR559 + from ltr559 import LTR559 + ltr559 = LTR559() +except ImportError: + import ltr559 + +from bme280 import BME280 +from enviroplus import gas +from subprocess import PIPE, Popen +from PIL import Image +from PIL import ImageDraw +from PIL import ImageFont +from fonts.ttf import RobotoMedium as UserFont +import logging + +logging.basicConfig( + format='%(asctime)s.%(msecs)03d %(levelname)-8s %(message)s', + level=logging.INFO, + datefmt='%Y-%m-%d %H:%M:%S') + +logging.info("""all-in-one.py - Displays readings from all of Enviro plus' sensors +Press Ctrl+C to exit! +""") + +# BME280 temperature/pressure/humidity sensor +bme280 = BME280() + +# Create ST7735 LCD display class +st7735 = ST7735.ST7735( + port=0, + cs=1, + dc=9, + backlight=12, + rotation=270, + spi_speed_hz=10000000 +) + +# Initialize display +st7735.begin() + +WIDTH = st7735.width +HEIGHT = st7735.height + +# 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) + +message = "" + +# The position of the top bar +top_pos = 25 + + +# Displays data and text on the 0.96" LCD +def display_text(variable, data, unit): + # Maintain length of list + values[variable] = values[variable][1:] + [data] + # Scale the values for the variable between 0 and 1 + vmin = min(values[variable]) + vmax = max(values[variable]) + colours = [(v - vmin + 1) / (vmax - vmin + 1) for v in values[variable]] + # Format the variable name and value + message = "{}: {:.1f} {}".format(variable[:4], data, unit) + logging.info(message) + draw.rectangle((0, 0, WIDTH, HEIGHT), (255, 255, 255)) + for i in range(len(colours)): + # Convert the values to colours from red to blue + 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 a 1-pixel wide rectangle of colour + draw.rectangle((i, top_pos, i + 1, HEIGHT), (r, g, b)) + # Draw a line graph in black + 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)) + # Write the text at the top in black + draw.text((0, 0), message, font=font, fill=(0, 0, 0)) + st7735.display(img) + + +# Get the temperature of the CPU for compensation +def get_cpu_temperature(): + process = Popen(['vcgencmd', 'measure_temp'], stdout=PIPE, universal_newlines=True) + output, _error = process.communicate() + return float(output[output.index('=') + 1:output.rindex("'")]) + + +# Tuning factor for compensation. Decrease this number to adjust the +# temperature down, and increase to adjust up +factor = 2.25 + +cpu_temps = [get_cpu_temperature()] * 5 + +delay = 0.5 # Debounce the proximity tap +mode = 0 # The starting mode +last_page = 0 +light = 1 + +# Create a values dict to store the data +variables = ["temperature", + "pressure", + "humidity", + "light"] + +values = {} + +for v in variables: + values[v] = [1] * WIDTH + +# The main loop +try: + while True: + proximity = ltr559.get_proximity() + + # If the proximity crosses the threshold, toggle the mode + if proximity > 1500 and time.time() - last_page > delay: + mode += 1 + mode %= len(variables) + last_page = time.time() + + # One mode for each variable + if mode == 0: + # variable = "temperature" + unit = "C" + cpu_temp = get_cpu_temperature() + # Smooth out with some averaging to decrease jitter + cpu_temps = cpu_temps[1:] + [cpu_temp] + avg_cpu_temp = sum(cpu_temps) / float(len(cpu_temps)) + raw_temp = bme280.get_temperature() + data = raw_temp - ((avg_cpu_temp - raw_temp) / factor) + display_text(variables[mode], data, unit) + + if mode == 1: + # variable = "pressure" + unit = "hPa" + data = bme280.get_pressure() + display_text(variables[mode], data, unit) + + if mode == 2: + # variable = "humidity" + unit = "%" + data = bme280.get_humidity() + display_text(variables[mode], data, unit) + + if mode == 3: + # variable = "light" + unit = "Lux" + if proximity < 10: + data = ltr559.get_lux() + else: + data = 1 + display_text(variables[mode], data, unit) + +# Exit cleanly +except KeyboardInterrupt: + sys.exit(0)