def work(scl_pin, sda_pin, tca_address, intervall, sensor_mappings,
factor_sunny, mqtt_broker, mqtt_client_id, mqtt_port, mqtt_user,
mqtt_password, mqtt_topic):
tca = tca9548a.TCA9548A(scl_pin, sda_pin, tca_address)
mqtt_client = MQTTClient(mqtt_client_id, mqtt_broker, mqtt_port, mqtt_user,
mqtt_password)
print("Starting infinite loop")
while True:
try:
mqtt_client.connect()
sensor_readings = []
for row in sensor_mappings:
tca.switch_channel(row[0])
if row[1] == "BH1750":
sensor = bh1750.BH1750(tca.bus)
sensor.reset()
reading = sensor.luminance(
bh1750.BH1750.ONCE_HIRES_1) * row[4]
if row[3]:
sensor_readings.append([row[2], reading])
else:
mqtt_client.publish(mqtt_topic + row[2], str(reading))
sensor.off()
elif row[1] == "VEML7700":
sensor = veml7700.VEML7700(address=0x10,
i2c=tca.bus,
it=25,
gain=1 / 8)
reading = sensor.read_lux() * row[4]
if row[3]:
sensor_readings.append([row[2], reading])
else:
mqtt_client.publish(mqtt_topic + row[2], str(reading))
else:
print("Unknown sensor or bad config!")
sensor_readings.sort(key=sort_readings)
sunny_sides = []
for row in sensor_readings:
if row[1] >= sensor_readings[0][1] * factor_sunny:
sunny_sides.append(row[0])
if len(sunny_sides) >= 1:
mqtt_client.publish(mqtt_topic + "weather/sun_direction",
str(sunny_sides))
else:
mqtt_client.publish(mqtt_topic + "weather/sun_direction",
"none")
mqtt_client.disconnect()
except:
print("Error in loop!")
print("These values were recorded: " + str(sensor_readings) +
" and these are the sunny sides: " + str(sunny_sides))
sleep(intervall)
# UV sensing using library
import bh1750
import machine
i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4))
'''
confirm your device is present on the bus
it should return [35] for this particular sensor
if this returns nothing, check your wiring
then check the Pin GPIO numbers are correct
'''
print(i2c.scan())
s = bh1750.BH1750(i2c)
while True:
s.luminance(BH1750.ONCE_HIRES_1)
'''
there are lots of options to sense luminance
read bh1750.py for details
this is a high resolution single reading
it returns a float of luminance in LUX
'''
#!/usr/bin/python
import bh1750
import time
light = bh1750.BH1750()
print("Default parameters:" + str(light.get_light_mode()))
print()
light = bh1750.BH1750(mode=5)
print("Low resolution, but faster:" + str(light.get_light_mode()))
print()
light = bh1750.BH1750(0, 1, 0) # Address pin low, I2Cbus 1, continuous mode
light.set_mode()
for i in range(20):
print("Continuous readings, " + str(i) + ":" + str(light.get_light()))
time.sleep(1)
# simple script to get lux values from BH1750 sensor
import time
import bh1750
try:
import smbus2 as smbus
except ImportError:
import smbus
# create i2c bus object. usually bus 1.
bus = smbus.SMBus(1)
# create sensor object. default address is 0x23. secondary address is 0x5C
sensor = bh1750.BH1750(bus, addr=0x23)
try:
print("Reading lux values from sensor. Press Ctrl-C to exit")
print("")
print("Sensitivity: {:d}".format(sensor.mtreg))
while True:
print("Light level: {:3.2f} lx ".format(sensor.measure_high_res()),
end='\r')
time.sleep(1)
except KeyboardInterrupt:
print('script stopped by user')
finally:
bus.close()
def __init__(self, _sleep):
self.sleep = _sleep
self.data = data.Sensors_data()
self.bus = smbus.SMBus(1)
self.light = bh1750.BH1750(self.bus)
self.dht = dht11.DHT()
# Pot qui pense - CREPP 2019 # GPL V3.0 # www.crepp.org - [email protected] import machine import bh1750 i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4)) lum = bh1750.BH1750(i2c) def test(): print(lum.lecture_lumiere(bh1750.MODE_CONTINU_HAUTE_RESOLUTION))
#
# Utilisation capteur de luminosite BH1750
# Tester sur Wemos D1 mini
#
# Auteur : iTechnoFrance
#
import machine, time
import bh1750 # librairie capteur BH1750
# Declaration I2C
# // D1 -> GPIO05 --> SCL
# // D2 -> GPIO04 --> SDA
i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4), freq=400000)
capteur_lumiere = bh1750.BH1750(i2c) # declaration BH1750
if (capteur_lumiere.detect()):
# Resolutions et modes possibles pour les mesures
# MODE_CONTINU_HAUTE_RESOLUTION = Mesure continue, résolution 1 Lux, temps de mesure 120ms
# MODE_2_CONTINU_HAUTE_RESOLUTION = Mesure continue, résolution 0.5 Lux, temps de mesure 120ms
# MODE_CONTINU_BASSE_RESOLUTION = Mesure continue, résolution 4 Lux, temps de mesure 16ms
# MODE_UNE_MESURE_HAUTE_RESOLUTION = 1 mesure puis passe en veille, résolution 1 Lux, temps de mesure 120ms
# MODE_2_UNE_MESURE_HAUTE_RESOLUTION = 1 mesure puis passe en veille, résolution 0.5 Lux, temps de mesure 120ms
# MODE_UNE_MESURE_BASSE_RESOLUTION = 1 mesure puis passe en veille, résolution 4 Lux, temps de mesure 16ms
while True:
mesure_lux = capteur_lumiere.lecture_lumiere(
bh1750.MODE_CONTINU_HAUTE_RESOLUTION)
print(mesure_lux)
time.sleep(1)
else:
print("Capteur BH1750 non detecte")