def __init__(self):
# BME280 temperature/pressure/humidity sensor
self.bme280 = BME280()
# Light sensor
self.ltr559 = LTR559()
self.noise = Noise()
self.cpu_temps = None
self.factor = 2.25
def __init__(self, soundLevelToReach, interval, frequency_ranges,
onSoundEventCallback):
self.soundLevelToReach = soundLevelToReach
self.interval = interval
self.onSoundEvent = onSoundEventCallback
self.frequency_ranges = frequency_ranges
self.noise = Noise()
# init and start thread:
Thread.__init__(self)
self.daemon = True
self.start()
def test_noise_get_amplitudes_at_frequency_ranges(sounddevice, numpy):
from enviroplus.noise import Noise
noise = Noise(sample_rate=16000, duration=0.1)
noise.get_amplitudes_at_frequency_ranges([(100, 500), (501, 1000)])
sounddevice.rec.assert_called_with(0.1 * 16000,
samplerate=16000,
blocking=True,
channels=1,
dtype='float64')
class SoundDetector(Thread):
def __init__(self, soundLevelToReach, interval, frequency_ranges,
onSoundEventCallback):
self.soundLevelToReach = soundLevelToReach
self.interval = interval
self.onSoundEvent = onSoundEventCallback
self.frequency_ranges = frequency_ranges
self.noise = Noise()
# init and start thread:
Thread.__init__(self)
self.daemon = True
self.start()
def get_noise(self, frequency_ranges):
amps = self.noise.get_amplitudes_at_frequency_ranges(frequency_ranges)
return amps
def is_shouting(self, amps):
for i in range(len(amps)):
if amps[i] > self.soundLevelToReach:
return amps[i]
def run(self):
while True:
amps = self.get_noise(self.frequency_ranges)
reachedValue = self.is_shouting(amps)
if reachedValue and self.onSoundEvent:
self.onSoundEvent(amps, reachedValue)
time.sleep(self.interval)
def test_noise_get_noise_profile(sounddevice, numpy):
from enviroplus.noise import Noise
numpy.mean.return_value = 10.0
noise = Noise(sample_rate=16000, duration=0.1)
amp_low, amp_mid, amp_high, amp_total = noise.get_noise_profile(
noise_floor=100, low=0.12, mid=0.36, high=None)
sounddevice.rec.assert_called_with(0.1 * 16000,
samplerate=16000,
blocking=True,
channels=1,
dtype='float64')
assert amp_total == 10.0
class Sensors:
def __init__(self):
# BME280 temperature/pressure/humidity sensor
self.bme280 = BME280()
# Light sensor
self.ltr559 = LTR559()
self.noise = Noise()
self.cpu_temps = None
self.factor = 2.25
# Get the temperature of the CPU for compensation
def get_cpu_temperature(self):
process = Popen(['vcgencmd', 'measure_temp'],
stdout=PIPE,
universal_newlines=True)
output, _error = process.communicate()
return float(output[output.index('=') + 1:output.rindex("'")])
def get_temperature(self):
return self.bme280.get_temperature()
def get_correct_temperature(self):
if self.cpu_temps is None:
self.cpu_temps = [self.get_cpu_temperature()] * 5
cpu_temp = self.get_cpu_temperature()
# Smooth out with some averaging to decrease jitter
self.cpu_temps = self.cpu_temps[1:] + [cpu_temp]
avg_cpu_temp = sum(self.cpu_temps) / float(len(self.cpu_temps))
raw_temp = self.get_temperature()
raw_data = raw_temp - ((avg_cpu_temp - raw_temp) / self.factor)
return raw_data
def get_pressure(self):
return self.bme280.get_pressure()
def get_humidity(self):
return self.bme280.get_humidity()
def get_correct_humidity(self):
dewpoint = self.get_temperature() - ((100 - self.get_humidity()) / 5)
corr_humidity = 100 - (5 * (self.get_correct_temperature() - dewpoint))
return min(100, corr_humidity)
def get_lux(self):
return self.ltr559.get_lux()
def get_proximity(self):
return self.ltr559.get_proximity()
def get_noise_amp(self):
amps = self.noise.get_amplitudes_at_frequency_ranges([(100, 200),
(500, 600),
(1000, 1200),
(2000, 3000)])
amps = [n * 32 for n in amps]
return amps
def read_values():
values = {}
cpu_temp = get_cpu_temperature()
raw_temp = bme280.get_temperature()
comp_temp = raw_temp - ((cpu_temp - raw_temp) / comp_factor)
lux = ltr559.get_lux()
proximity = ltr559.get_proximity()
readings = gas.read_all()
oxidising = readings.oxidising
nh3 = readings.nh3
reducing = readings.reducing
adc = readings.adc
noise = Noise()
amps = noise.get_amplitudes_at_frequency_ranges([(100, 200), (500, 600),
(1000, 1200)])
amps = [n * 32 for n in amps]
values["temperature"] = "{:.2f}".format(comp_temp)
values["cpu_temp"] = "{:.2f}".format(cpu_temp)
values["pressure"] = "{:.2f}".format(bme280.get_pressure() * 100)
values["humidity"] = "{:.2f}".format(bme280.get_humidity())
values["lux"] = "{:05.02f}".format(lux)
values["proximity"] = "{:05.02f}".format(proximity)
values["nh3"] = "{:05.02f}".format(nh3)
values["oxidising"] = "{:05.02f}".format(oxidising)
values["reducing"] = "{:05.02f}".format(reducing)
values["adc"] = "{:05.02f}".format(adc)
values["amp_100_200"] = "{:05.02f}".format(amps[0])
values["amp_500_600"] = "{:05.02f}".format(amps[1])
values["amp_1000_1200"] = "{:05.02f}".format(amps[2])
try:
pm_values = pms5003.read()
values["P2"] = str(pm_values.pm_ug_per_m3(2.5))
values["P1"] = str(pm_values.pm_ug_per_m3(10))
except ReadTimeoutError:
pms5003.reset()
pm_values = pms5003.read()
values["P2"] = str(pm_values.pm_ug_per_m3(2.5))
values["P1"] = str(pm_values.pm_ug_per_m3(10))
return values
def test_get_amplitude_at_frequency_range(sounddevice, numpy):
from enviroplus.noise import Noise
noise = Noise(sample_rate=16000, duration=0.1)
noise.get_amplitude_at_frequency_range(0, 8000)
with pytest.raises(ValueError):
noise.get_amplitude_at_frequency_range(0, 16000)
# Set up BME280 weather sensor
bus = SMBus(1)
bme280 = BME280(i2c_dev=bus)
min_temp = None
max_temp = None
factor = 1.70
cpu_temps = [get_cpu_temperature()] * 5
# Set up light sensor
ltr559 = LTR559()
# Set up microphone
noise = Noise()
# Pressure variables
pressure_vals = []
time_vals = []
num_vals = 1000
interval = 1
trend = "-"
# Keep track of time elapsed
start_time = time.time()
while True:
try:
path = os.path.dirname(os.path.realpath(__file__))
ltr559 = LTR559()
except ImportError:
import ltr559
from bme280 import BME280
from enviroplus import gas
from enviroplus.noise import Noise
from subprocess import PIPE, Popen
from fonts.ttf import RobotoMedium as UserFont
from threading import Thread, Event
# BME280 temperature/pressure/humidity sensor
bme280 = BME280()
# MEMS microphone
noise = Noise()
# initialise audio
audio = pyaudio.PyAudio()
# This is the url that sensor data will be posted to
sensorsurl = "http://192.168.0.156:5000/sensordata"
#Full-scale dB range of microphone
WAIT_TIME = 10
stop_threads = False
# function to convert from PCM to dbSPL
def PCM_to_dbSPL(pcm):
FSdbSPL = 120
def test_noise_setup(sounddevice, numpy):
from enviroplus.noise import Noise
noise = Noise(sample_rate=16000, duration=0.1)
del noise
import os
import time
import rrdtool
from enviroplus.noise import Noise
noise = Noise()
dir_path = os.path.dirname(os.path.realpath(__file__))
starttime = time.time()
# TODO XXX this data doesn't look great as 4 line plots overlapping, make better
# possibly use the other amplitude @ frequency API and use several RRDs
# rrdtool can only support 1 Hz data, so if this isn't the right tool for this particular job...
# run roughly 1 Hz every ~minute scheduled by cron
while time.time() - starttime < 55:
amp = noise.get_noise_profile()
print(amp)
rrdtool.update(dir_path + "/rrd/noise.rrd", "N:{}:{}:{}:{}".format(*amp))
time.sleep(1)
oxidising = Gauge("oxidising", "oxidising gases in Ohms")
ammonia = Gauge("ammonia", "ammonia in Ohms")
def update_gas():
mixture = gas.read_all()
reducing.set(mixture.reducing)
oxidising.set(mixture.oxidising)
ammonia.set(mixture.nh3)
# Noise
#
# Noise is measured in different frequency groups. The default uses 3:
# low, mid and high, and a total which is actually the average of all 3.
noise = Gauge("noise", "noise in amps", ["level"])
noise_measure = Noise()
# This takes a little longer --- by default listens for 0.5 seconds
def update_noise():
amp_low, amp_mid, amp_high, amp_total = noise_measure.get_noise_profile()
noise.labels(level="low").set(amp_low)
noise.labels(level="mid").set(amp_mid)
noise.labels(level="high").set(amp_high)
noise.labels(level="total").set(amp_total)
# Particulates
#
# This sensor also allows for measuring a variant "atmospheric environment".
# It's not clear to me what this means, so I'm sticking to the code as
# used in the examples in the module Github repository.
pms5003_measure = PMS5003()
particulates = Gauge("particulates", "particulates in µg/m³", ["diameter"])
import ST7735
from PIL import Image, ImageDraw
from enviroplus.noise import Noise
print("""noise-profile.py - Get a simple noise profile.
This example grabs a basic 3-bin noise profile of low, medium and high frequency noise, plotting the noise characteristics as coloured bars.
Press Ctrl+C to exit!
""")
noise = Noise()
disp = ST7735.ST7735(port=0,
cs=ST7735.BG_SPI_CS_FRONT,
dc=9,
backlight=12,
rotation=90)
disp.begin()
img = Image.new('RGB', (disp.width, disp.height), color=(0, 0, 0))
draw = ImageDraw.Draw(img)
while True:
low, mid, high, amp = noise.get_noise_profile()
low *= 128
mid *= 128
high *= 128
amp *= 64