[EVA-2020-02-2.git] / examples / combined.py

#!/usr/bin/env python3

import time
import colorsys
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 pms5003 import PMS5003, ReadTimeoutError as pmsReadTimeoutError
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()

# PMS5003 particulate sensor
pms5003 = PMS5003()
time.sleep(1.0)

# 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)
font_size_small = 10
font_size_large = 20
font = ImageFont.truetype(UserFont, font_size_large)
smallfont = ImageFont.truetype(UserFont, font_size_small)
x_offset = 2
y_offset = 2

message = ""

# The position of the top bar
top_pos = 25

# Create a values dict to store the data
variables = ["temperature",
             "pressure",
             "humidity",
             "light",
             "oxidised",
             "reduced",
             "nh3",
             "pm1",
             "pm25",
             "pm10"]

units = ["C",
         "hPa",
         "%",
         "Lux",
         "kO",
         "kO",
         "kO",
         "ug/m3",
         "ug/m3",
         "ug/m3"]

# Define your own warning limits
# The limits definition follows the order of the variables array
# Example limits explanation for temperature:
# [4,18,28,35] means
# [-273.15 .. 4] -> Dangerously Low
# (4 .. 18]      -> Low
# (18 .. 28]     -> Normal
# (28 .. 35]     -> High
# (35 .. MAX]    -> Dangerously High
# DISCLAIMER: The limits provided here are just examples and come
# with NO WARRANTY. The authors of this example code claim
# NO RESPONSIBILITY if reliance on the following values or this
# code in general leads to ANY DAMAGES or DEATH.
limits = [[4, 18, 28, 35],
          [250, 650, 1013.25, 1015],
          [20, 30, 60, 70],
          [-1, -1, 30000, 100000],
          [-1, -1, 40, 50],
          [-1, -1, 450, 550],
          [-1, -1, 200, 300],
          [-1, -1, 50, 100],
          [-1, -1, 50, 100],
          [-1, -1, 50, 100]]

# RGB palette for values on the combined screen
palette = [(0, 0, 255),           # Dangerously Low
           (0, 255, 255),         # Low
           (0, 255, 0),           # Normal
           (255, 255, 0),         # High
           (255, 0, 0)]           # Dangerously High

values = {}


# 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)


# Saves the data to be used in the graphs later and prints to the log
def save_data(idx, data):
    variable = variables[idx]
    # Maintain length of list
    values[variable] = values[variable][1:] + [data]
    unit = units[idx]
    message = "{}: {:.1f} {}".format(variable[:4], data, unit)
    logging.info(message)


# Displays all the text on the 0.96" LCD
def display_everything():
    draw.rectangle((0, 0, WIDTH, HEIGHT), (0, 0, 0))
    column_count = 2
    row_count = (len(variables) / column_count)
    for i in range(len(variables)):
        variable = variables[i]
        data_value = values[variable][-1]
        unit = units[i]
        x = x_offset + ((WIDTH / column_count) * (i / row_count))
        y = y_offset + ((HEIGHT / row_count) * (i % row_count))
        message = "{}: {:.1f} {}".format(variable[:4], data_value, unit)
        lim = limits[i]
        rgb = palette[0]
        for j in range(len(lim)):
            if data_value > lim[j]:
                rgb = palette[j + 1]
        draw.text((x, y), message, font=smallfont, fill=rgb)
    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("'")])


def main():
    # 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 = 10    # The starting mode
    last_page = 0

    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) + 1)
                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)

            if mode == 4:
                # variable = "oxidised"
                unit = "kO"
                data = gas.read_all()
                data = data.oxidising / 1000
                display_text(variables[mode], data, unit)

            if mode == 5:
                # variable = "reduced"
                unit = "kO"
                data = gas.read_all()
                data = data.reducing / 1000
                display_text(variables[mode], data, unit)

            if mode == 6:
                # variable = "nh3"
                unit = "kO"
                data = gas.read_all()
                data = data.nh3 / 1000
                display_text(variables[mode], data, unit)

            if mode == 7:
                # variable = "pm1"
                unit = "ug/m3"
                try:
                    data = pms5003.read()
                except pmsReadTimeoutError:
                    logging.warn("Failed to read PMS5003")
                else:
                    data = float(data.pm_ug_per_m3(1.0))
                    display_text(variables[mode], data, unit)

            if mode == 8:
                # variable = "pm25"
                unit = "ug/m3"
                try:
                    data = pms5003.read()
                except pmsReadTimeoutError:
                    logging.warn("Failed to read PMS5003")
                else:
                    data = float(data.pm_ug_per_m3(2.5))
                    display_text(variables[mode], data, unit)

            if mode == 9:
                # variable = "pm10"
                unit = "ug/m3"
                try:
                    data = pms5003.read()
                except pmsReadTimeoutError:
                    logging.warn("Failed to read PMS5003")
                else:
                    data = float(data.pm_ug_per_m3(10))
                    display_text(variables[mode], data, unit)
            if mode == 10:
                # Everything on one screen
                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()
                raw_data = raw_temp - ((avg_cpu_temp - raw_temp) / factor)
                save_data(0, raw_data)
                display_everything()
                raw_data = bme280.get_pressure()
                save_data(1, raw_data)
                display_everything()
                raw_data = bme280.get_humidity()
                save_data(2, raw_data)
                if proximity < 10:
                    raw_data = ltr559.get_lux()
                else:
                    raw_data = 1
                save_data(3, raw_data)
                display_everything()
                gas_data = gas.read_all()
                save_data(4, gas_data.oxidising / 1000)
                save_data(5, gas_data.reducing / 1000)
                save_data(6, gas_data.nh3 / 1000)
                display_everything()
                pms_data = None
                try:
                    pms_data = pms5003.read()
                except pmsReadTimeoutError:
                    logging.warn("Failed to read PMS5003")
                else:
                    save_data(7, float(pms_data.pm_ug_per_m3(1.0)))
                    save_data(8, float(pms_data.pm_ug_per_m3(2.5)))
                    save_data(9, float(pms_data.pm_ug_per_m3(10)))
                    display_everything()

    # Exit cleanly
    except KeyboardInterrupt:
        sys.exit(0)


if __name__ == "__main__":
    main()
Commit	Line	Data
20442c9a	1	#!/usr/bin/env python3
71dc2962 K	2
	3	import time
	4	import colorsys
71dc2962 K	5	import sys
	6	import ST7735
	7	try:
	8	# Transitional fix for breaking change in LTR559
	9	from ltr559 import LTR559
	10	ltr559 = LTR559()
	11	except ImportError:
	12	import ltr559
	13
	14	from bme280 import BME280
	15	from pms5003 import PMS5003, ReadTimeoutError as pmsReadTimeoutError
	16	from enviroplus import gas
	17	from subprocess import PIPE, Popen
	18	from PIL import Image
	19	from PIL import ImageDraw
	20	from PIL import ImageFont
20442c9a	21	from fonts.ttf import RobotoMedium as UserFont
71dc2962 K	22	import logging
	23
	24	logging.basicConfig(
	25	format='%(asctime)s.%(msecs)03d %(levelname)-8s %(message)s',
	26	level=logging.INFO,
	27	datefmt='%Y-%m-%d %H:%M:%S')
	28
	29	logging.info("""all-in-one.py - Displays readings from all of Enviro plus' sensors
	30
	31	Press Ctrl+C to exit!
	32
	33	""")
	34
	35	# BME280 temperature/pressure/humidity sensor
	36	bme280 = BME280()
	37
	38	# PMS5003 particulate sensor
	39	pms5003 = PMS5003()
7c3404f8	40	time.sleep(1.0)
71dc2962 K	41
	42	# Create ST7735 LCD display class
	43	st7735 = ST7735.ST7735(
	44	port=0,
	45	cs=1,
	46	dc=9,
	47	backlight=12,
	48	rotation=270,
	49	spi_speed_hz=10000000
	50	)
	51
	52	# Initialize display
	53	st7735.begin()
	54
	55	WIDTH = st7735.width
	56	HEIGHT = st7735.height
	57
	58	# Set up canvas and font
	59	img = Image.new('RGB', (WIDTH, HEIGHT), color=(0, 0, 0))
	60	draw = ImageDraw.Draw(img)
20442c9a	61	font_size_small = 10
	62	font_size_large = 20
	63	font = ImageFont.truetype(UserFont, font_size_large)
	64	smallfont = ImageFont.truetype(UserFont, font_size_small)
71dc2962 K	65	x_offset = 2
	66	y_offset = 2
	67
	68	message = ""
	69
	70	# The position of the top bar
	71	top_pos = 25
	72
	73	# Create a values dict to store the data
	74	variables = ["temperature",
	75	"pressure",
	76	"humidity",
	77	"light",
	78	"oxidised",
	79	"reduced",
	80	"nh3",
	81	"pm1",
	82	"pm25",
	83	"pm10"]
	84
	85	units = ["C",
	86	"hPa",
	87	"%",
	88	"Lux",
	89	"kO",
	90	"kO",
	91	"kO",
	92	"ug/m3",
	93	"ug/m3",
	94	"ug/m3"]
	95
	96	# Define your own warning limits
	97	# The limits definition follows the order of the variables array
	98	# Example limits explanation for temperature:
	99	# [4,18,28,35] means
	100	# [-273.15 .. 4] -> Dangerously Low
	101	# (4 .. 18] -> Low
	102	# (18 .. 28] -> Normal
	103	# (28 .. 35] -> High
	104	# (35 .. MAX] -> Dangerously High
	105	# DISCLAIMER: The limits provided here are just examples and come
	106	# with NO WARRANTY. The authors of this example code claim
	107	# NO RESPONSIBILITY if reliance on the following values or this
	108	# code in general leads to ANY DAMAGES or DEATH.
be4d0fc9 PH	109	limits = [[4, 18, 28, 35],
	110	[250, 650, 1013.25, 1015],
	111	[20, 30, 60, 70],
	112	[-1, -1, 30000, 100000],
	113	[-1, -1, 40, 50],
	114	[-1, -1, 450, 550],
	115	[-1, -1, 200, 300],
	116	[-1, -1, 50, 100],
	117	[-1, -1, 50, 100],
	118	[-1, -1, 50, 100]]
71dc2962 K	119
71dc2962 K	120	# RGB palette for values on the combined screen
be4d0fc9 PH	121	palette = [(0, 0, 255), # Dangerously Low
	122	(0, 255, 255), # Low
	123	(0, 255, 0), # Normal
	124	(255, 255, 0), # High
	125	(255, 0, 0)] # Dangerously High
71dc2962 K	126
	127	values = {}
	128
	129
	130	# Displays data and text on the 0.96" LCD
	131	def display_text(variable, data, unit):
	132	# Maintain length of list
	133	values[variable] = values[variable][1:] + [data]
	134	# Scale the values for the variable between 0 and 1
be4d0fc9 PH	135	vmin = min(values[variable])
	136	vmax = max(values[variable])
	137	colours = [(v - vmin + 1) / (vmax - vmin + 1) for v in values[variable]]
71dc2962 K	138	# Format the variable name and value
	139	message = "{}: {:.1f} {}".format(variable[:4], data, unit)
	140	logging.info(message)
	141	draw.rectangle((0, 0, WIDTH, HEIGHT), (255, 255, 255))
	142	for i in range(len(colours)):
	143	# Convert the values to colours from red to blue
	144	colour = (1.0 - colours[i]) * 0.6
be4d0fc9	145	r, g, b = [int(x * 255.0) for x in colorsys.hsv_to_rgb(colour, 1.0, 1.0)]
71dc2962	146	# Draw a 1-pixel wide rectangle of colour
be4d0fc9	147	draw.rectangle((i, top_pos, i + 1, HEIGHT), (r, g, b))
71dc2962	148	# Draw a line graph in black
be4d0fc9 PH	149	line_y = HEIGHT - (top_pos + (colours[i] * (HEIGHT - top_pos))) + top_pos
be4d0fc9 PH	150	draw.rectangle((i, line_y, i + 1, line_y + 1), (0, 0, 0))
71dc2962 K	151	# Write the text at the top in black
	152	draw.text((0, 0), message, font=font, fill=(0, 0, 0))
	153	st7735.display(img)
	154
be4d0fc9	155
71dc2962 K	156	# Saves the data to be used in the graphs later and prints to the log
	157	def save_data(idx, data):
	158	variable = variables[idx]
	159	# Maintain length of list
	160	values[variable] = values[variable][1:] + [data]
	161	unit = units[idx]
	162	message = "{}: {:.1f} {}".format(variable[:4], data, unit)
	163	logging.info(message)
	164
	165
	166	# Displays all the text on the 0.96" LCD
	167	def display_everything():
	168	draw.rectangle((0, 0, WIDTH, HEIGHT), (0, 0, 0))
	169	column_count = 2
be4d0fc9	170	row_count = (len(variables) / column_count)
20442c9a	171	for i in range(len(variables)):
71dc2962 K	172	variable = variables[i]
	173	data_value = values[variable][-1]
	174	unit = units[i]
be4d0fc9 PH	175	x = x_offset + ((WIDTH / column_count) * (i / row_count))
be4d0fc9 PH	176	y = y_offset + ((HEIGHT / row_count) * (i % row_count))
71dc2962 K	177	message = "{}: {:.1f} {}".format(variable[:4], data_value, unit)
	178	lim = limits[i]
	179	rgb = palette[0]
20442c9a	180	for j in range(len(lim)):
71dc2962	181	if data_value > lim[j]:
be4d0fc9	182	rgb = palette[j + 1]
71dc2962 K	183	draw.text((x, y), message, font=smallfont, fill=rgb)
	184	st7735.display(img)
	185
	186
71dc2962 K	187	# Get the temperature of the CPU for compensation
	188	def get_cpu_temperature():
	189	process = Popen(['vcgencmd', 'measure_temp'], stdout=PIPE, universal_newlines=True)
	190	output, _error = process.communicate()
	191	return float(output[output.index('=') + 1:output.rindex("'")])
	192
	193
be4d0fc9 PH	194	def main():
	195	# Tuning factor for compensation. Decrease this number to adjust the
	196	# temperature down, and increase to adjust up
	197	factor = 2.25
	198
	199	cpu_temps = [get_cpu_temperature()] * 5
	200
	201	delay = 0.5 # Debounce the proximity tap
	202	mode = 10 # The starting mode
	203	last_page = 0
	204
	205	for v in variables:
	206	values[v] = [1] * WIDTH
	207
	208	# The main loop
	209	try:
	210	while True:
	211	proximity = ltr559.get_proximity()
	212
	213	# If the proximity crosses the threshold, toggle the mode
	214	if proximity > 1500 and time.time() - last_page > delay:
	215	mode += 1
	216	mode %= (len(variables) + 1)
	217	last_page = time.time()
	218
	219	# One mode for each variable
	220	if mode == 0:
	221	# variable = "temperature"
	222	unit = "C"
	223	cpu_temp = get_cpu_temperature()
	224	# Smooth out with some averaging to decrease jitter
	225	cpu_temps = cpu_temps[1:] + [cpu_temp]
	226	avg_cpu_temp = sum(cpu_temps) / float(len(cpu_temps))
	227	raw_temp = bme280.get_temperature()
	228	data = raw_temp - ((avg_cpu_temp - raw_temp) / factor)
	229	display_text(variables[mode], data, unit)
71dc2962	230
be4d0fc9 PH	231	if mode == 1:
	232	# variable = "pressure"
	233	unit = "hPa"
	234	data = bme280.get_pressure()
	235	display_text(variables[mode], data, unit)
71dc2962	236
be4d0fc9 PH	237	if mode == 2:
	238	# variable = "humidity"
	239	unit = "%"
	240	data = bme280.get_humidity()
71dc2962 K	241	display_text(variables[mode], data, unit)
71dc2962 K	242
be4d0fc9 PH	243	if mode == 3:
	244	# variable = "light"
	245	unit = "Lux"
	246	if proximity < 10:
	247	data = ltr559.get_lux()
	248	else:
	249	data = 1
71dc2962 K	250	display_text(variables[mode], data, unit)
71dc2962 K	251
be4d0fc9 PH	252	if mode == 4:
	253	# variable = "oxidised"
	254	unit = "kO"
	255	data = gas.read_all()
	256	data = data.oxidising / 1000
71dc2962	257	display_text(variables[mode], data, unit)
71dc2962	258
be4d0fc9 PH	259	if mode == 5:
	260	# variable = "reduced"
	261	unit = "kO"
	262	data = gas.read_all()
	263	data = data.reducing / 1000
	264	display_text(variables[mode], data, unit)
71dc2962	265
be4d0fc9 PH	266	if mode == 6:
	267	# variable = "nh3"
	268	unit = "kO"
	269	data = gas.read_all()
	270	data = data.nh3 / 1000
	271	display_text(variables[mode], data, unit)
71dc2962	272
be4d0fc9 PH	273	if mode == 7:
	274	# variable = "pm1"
	275	unit = "ug/m3"
	276	try:
	277	data = pms5003.read()
	278	except pmsReadTimeoutError:
	279	logging.warn("Failed to read PMS5003")
	280	else:
	281	data = float(data.pm_ug_per_m3(1.0))
	282	display_text(variables[mode], data, unit)
	283
	284	if mode == 8:
	285	# variable = "pm25"
	286	unit = "ug/m3"
	287	try:
	288	data = pms5003.read()
	289	except pmsReadTimeoutError:
	290	logging.warn("Failed to read PMS5003")
	291	else:
	292	data = float(data.pm_ug_per_m3(2.5))
	293	display_text(variables[mode], data, unit)
	294
	295	if mode == 9:
	296	# variable = "pm10"
	297	unit = "ug/m3"
	298	try:
	299	data = pms5003.read()
	300	except pmsReadTimeoutError:
	301	logging.warn("Failed to read PMS5003")
	302	else:
	303	data = float(data.pm_ug_per_m3(10))
	304	display_text(variables[mode], data, unit)
	305	if mode == 10:
	306	# Everything on one screen
	307	cpu_temp = get_cpu_temperature()
	308	# Smooth out with some averaging to decrease jitter
	309	cpu_temps = cpu_temps[1:] + [cpu_temp]
	310	avg_cpu_temp = sum(cpu_temps) / float(len(cpu_temps))
	311	raw_temp = bme280.get_temperature()
	312	raw_data = raw_temp - ((avg_cpu_temp - raw_temp) / factor)
	313	save_data(0, raw_data)
	314	display_everything()
	315	raw_data = bme280.get_pressure()
	316	save_data(1, raw_data)
	317	display_everything()
	318	raw_data = bme280.get_humidity()
	319	save_data(2, raw_data)
	320	if proximity < 10:
	321	raw_data = ltr559.get_lux()
	322	else:
	323	raw_data = 1
	324	save_data(3, raw_data)
	325	display_everything()
	326	gas_data = gas.read_all()
	327	save_data(4, gas_data.oxidising / 1000)
	328	save_data(5, gas_data.reducing / 1000)
	329	save_data(6, gas_data.nh3 / 1000)
	330	display_everything()
	331	pms_data = None
	332	try:
	333	pms_data = pms5003.read()
	334	except pmsReadTimeoutError:
	335	logging.warn("Failed to read PMS5003")
	336	else:
337	save_data(7, float(pms_data.pm_ug_per_m3(1.0)))
338	save_data(8, float(pms_data.pm_ug_per_m3(2.5)))
339	save_data(9, float(pms_data.pm_ug_per_m3(10)))
340	display_everything()
341
342	# Exit cleanly
343	except KeyboardInterrupt:
344	sys.exit(0)
345
346
347	if __name__ == "__main__":
348	main()