def __init__(self, db_path='/home/pi/.greenhouse/greenhouse.db'):
"""
db_path defaults to /home/pi/.greenhouse/greenhouse.db
"""
self.db = GreenhouseDatabase(db_path)
self.darkness_level = 0.01
def __init__(self, db_path='/home/pi/.greenhouse/greenhouse.db'):
"""
db_path defaults to /home/pi/.greenhouse/greenhouse.db
"""
self.db = GreenhouseDatabase(db_path)
self.darkness_level = 0.01
def __init__(self, db_path='/home/pi/.greenhouse/greenhouse.db'):
"""
db_path defaults to /home/pi/.greenhouse/greenhouse.db
"""
self.db = GreenhouseDatabase(db_path)
self.target_temperature_lower = 20
self.target_temperature_upper = 30
self.target_humidity_lower = 60
self.target_humidity_upper = 85
self.target_soil = 60
self.target_light = 60
self.status_colours = {
self.SENSOR_LOW: 'blue',
self.SENSOR_OK: 'green',
self.SENSOR_HIGH: 'red',
}
self._setup_gpio()
def __init__(self, db_path="/home/pi/.greenhouse/greenhouse.db"):
"""
db_path defaults to /home/pi/.greenhouse/greenhouse.db
"""
self.db = GreenhouseDatabase(db_path)
self.target_temperature_lower = 20
self.target_temperature_upper = 30
self.target_humidity_lower = 60
self.target_humidity_upper = 85
self.target_soil = 60
self.target_light = 60
self.status_colours = {self.SENSOR_LOW: "blue", self.SENSOR_OK: "green", self.SENSOR_HIGH: "red"}
self._setup_gpio()
class Greenhouse(object):
DHT_SENSOR = Adafruit_DHT.DHT22
DHT = 19
SOIL = 26
LIGHT = 18
def __init__(self, db_path='/home/pi/.greenhouse/greenhouse.db'):
"""
db_path defaults to /home/pi/.greenhouse/greenhouse.db
"""
self.db = GreenhouseDatabase(db_path)
self.darkness_level = 0.01
@property
def temperature(self):
humidity, temperature = self._get_humidity_and_temperature()
return temperature
@property
def humidity(self):
humidity, temperature = self._get_humidity_and_temperature()
return humidity
@property
def soil(self):
return self._get_average_soil_moisture(5)
@property
def light(self):
return self._get_average_light_level(5)
def _get_humidity_and_temperature(self):
humidity, temperature = Adafruit_DHT.read_retry(sensor=self.DHT_SENSOR,
pin=self.DHT,
retries=5)
return (humidity, temperature)
def _get_soil_moisture(self):
time_taken = self._time_charging_soil_capacitor()
totally_wet_time = 4E-3
totally_dry_time = 0.9
moisture = (math.log(time_taken / totally_dry_time) /
math.log(totally_wet_time / totally_dry_time))
return max(0, min(1, moisture)) * 100
def _time_charging_soil_capacitor(self):
pin = self.SOIL
GPIO.setup(pin, GPIO.OUT, GPIO.PUD_OFF)
GPIO.output(pin, GPIO.LOW)
sleep(0.1)
start_time = time()
GPIO.setup(pin, GPIO.IN)
max_time = 1
while GPIO.input(pin) == GPIO.LOW and time() - start_time < max_time:
pass
end_time = time()
time_taken = end_time - start_time
return time_taken
def _get_light_level(self):
time_taken = self._time_charging_light_capacitor()
value = 100 * time_taken / self.darkness_level
return 100 - value
def _time_charging_light_capacitor(self):
pin = self.LIGHT
GPIO.setup(pin, GPIO.OUT)
GPIO.output(pin, GPIO.LOW)
sleep(0.1)
GPIO.setup(pin, GPIO.IN)
start_time = time()
end_time = time()
while (GPIO.input(pin) == GPIO.LOW
and time() - start_time < self.darkness_level):
end_time = time()
time_taken = end_time - start_time
return min(time_taken, self.darkness_level)
def _get_average_soil_moisture(self, num):
values = [self._get_soil_moisture() for n in range(num)]
average_value = sum(values) / len(values)
return average_value
def _get_average_light_level(self, num):
values = [self._get_light_level() for n in range(num)]
average_value = sum(values) / len(values)
return average_value
def _get_timestamp(self):
dt = datetime.now()
dt_date = str(dt.date())
dt_time = str(dt.time())
timestamp = "%s %s" % (dt_date, dt_time[:8])
return timestamp
def record_sensor_values(self):
"""
Save sensor readings to database
"""
timestamp = self._get_timestamp()
temperature = self.temperature
humidity = self.humidity
soil = self.soil
light = self.light
values = (timestamp, temperature, humidity, soil, light)
self.db.record_sensor_values(values)
def export_to_csv(self, file_path='/home/pi/greenhouse.csv'):
"""
Export sensor data from database and save as CSV file in file_path
Defaults to /home/pi/greenhouse.csv
"""
self.db.export_to_csv(file_path)
class GreenhouseIndicator(object):
LED_COLOURS = [
'white',
'red',
'blue',
'green',
]
LEDS = {
'white': [13, 9, 27],
'red': [16, 11, 23],
'blue': [20, 6, 22],
'green': [21, 12, 25],
}
SENSOR_LOW = 'low'
SENSOR_OK = 'ok'
SENSOR_HIGH = 'high'
def __init__(self, db_path='/home/pi/.greenhouse/greenhouse.db'):
"""
db_path defaults to /home/pi/.greenhouse/greenhouse.db
"""
self.db = GreenhouseDatabase(db_path)
self.target_temperature_lower = 20
self.target_temperature_upper = 30
self.target_humidity_lower = 60
self.target_humidity_upper = 85
self.target_soil = 60
self.target_light = 60
self.status_colours = {
self.SENSOR_LOW: 'blue',
self.SENSOR_OK: 'green',
self.SENSOR_HIGH: 'red',
}
self._setup_gpio()
@property
def temperature(self):
return self.db.get_sensor_value('temperature')
@property
def humidity(self):
return self.db.get_sensor_value('humidity')
@property
def soil(self):
return self.db.get_sensor_value('soil')
@property
def light(self):
return self.db.get_sensor_value('light')
@property
def temperature_status(self):
lower = self.target_temperature_lower
upper = self.target_temperature_upper
if lower <= self.temperature <= upper:
return self.SENSOR_OK
elif self.temperature < lower:
return self.SENSOR_LOW
elif self.temperature > upper:
return self.SENSOR_HIGH
@property
def humidity_status(self):
lower = self.target_humidity_lower
upper = self.target_humidity_upper
if lower <= self.humidity <= upper:
return self.SENSOR_OK
elif self.humidity < lower:
return self.SENSOR_LOW
elif self.humidity > upper:
return self.SENSOR_HIGH
@property
def soil_status(self):
if self.soil > self.target_soil:
return self.SENSOR_OK
else:
return self.SENSOR_LOW
@property
def light_status(self):
if self.light >= self.target_light:
return self.SENSOR_OK
else:
return self.SENSOR_LOW
def _setup_gpio(self):
for colour in self.LEDS:
for led in self.LEDS[colour]:
GPIO.setup(led, GPIO.OUT)
GPIO.output(led, False)
def _turn_led_on_or_off(self, colour, index, on_or_off):
led = self.LEDS[colour][index]
GPIO.output(led, on_or_off)
def _turn_led_on(self, colour, index):
self._turn_led_on_or_off(colour, index, on_or_off=True)
def _turn_led_off(self, colour, index):
self._turn_led_on_or_off(colour, index, on_or_off=False)
def _turn_colour_leds_on_or_off(self, colour, on_or_off):
leds = self.LEDS[colour]
for led in range(len(leds)):
if on_or_off:
self._turn_led_on(colour, led)
else:
self._turn_led_off(colour, led)
def _turn_colour_leds_on(self, colour):
self._turn_colour_leds_on_or_off(colour=colour, on_or_off=True)
def _turn_colour_leds_off(self, colour):
self._turn_colour_leds_on_or_off(colour=colour, on_or_off=False)
def _turn_index_leds_on_or_off(self, index, on_or_off):
for colour in self.LEDS:
if on_or_off:
self._turn_led_on(colour, index)
else:
self._turn_led_off(colour, index)
def _turn_index_leds_on(self, index):
self._turn_index_leds_on_or_off(index=index, on_or_off=True)
def _turn_index_leds_off(self, index):
self._turn_index_leds_on_or_off(index=index, on_or_off=False)
def _turn_all_leds_on_or_off(self, on_or_off):
for colour in self.LEDS:
if on_or_off:
self._turn_colour_leds_on(colour)
else:
self._turn_colour_leds_off(colour)
def _turn_all_leds_on(self):
self._turn_all_leds_on_or_off(on_or_off=True)
def _turn_all_leds_off(self):
self._turn_all_leds_on_or_off(on_or_off=False)
def turn_leds_on(self, colour=None, index=None):
"""
Turn LEDs on
- if colour given, only that colour
- if index given, only that index
- if both given, only that LED
- if neither given, all LEDs
e.g. turn_leds_on()
e.g. turn_leds_on(colour='red')
e.g. turn_leds_on(index=0)
e.g. turn_leds_on(colour='red', index=0)
"""
if colour and index is not None:
self._turn_led_on(colour, index)
elif colour:
self._turn_colour_leds_on(colour)
elif index is not None:
self._turn_index_leds_on(index)
else:
self._turn_all_leds_on()
def turn_leds_off(self, colour=None, index=None):
"""
Turn LEDs off
- if colour given, only that colour
- if index given, only that index
- if both given, only that LED
- if neither given, all LEDs
e.g. turn_leds_off()
e.g. turn_leds_off(colour='red')
e.g. turn_leds_off(index=0)
e.g. turn_leds_off(colour='red', index=0)
"""
if colour and index is not None:
self._turn_led_off(colour, index)
elif colour:
self._turn_colour_leds_off(colour)
elif index is not None:
self._turn_index_leds_off(index)
else:
self._turn_all_leds_off()
def show_status_on_leds(self):
"""
Use LEDs to indicate sensor statuses according to self.status_colours
"""
sensor_statuses = [
self.temperature_status,
self.humidity_status,
self.soil_status,
self.light_status,
]
for status in sensor_statuses:
colour = self.status_colours[status]
self.turn_leds_on(colour)
sleep(2)
self.turn_leds_off(colour)
sleep(0.1)
class Greenhouse(object):
DHT_SENSOR = Adafruit_DHT.DHT22
DHT = 19
SOIL = 26
LIGHT = 18
def __init__(self, db_path='/home/pi/.greenhouse/greenhouse.db'):
"""
db_path defaults to /home/pi/.greenhouse/greenhouse.db
"""
self.db = GreenhouseDatabase(db_path)
self.darkness_level = 0.01
@property
def temperature(self):
humidity, temperature = self._get_humidity_and_temperature()
return temperature
@property
def humidity(self):
humidity, temperature = self._get_humidity_and_temperature()
return humidity
@property
def soil(self):
return self._get_average_soil_moisture(5)
@property
def light(self):
return self._get_average_light_level(5)
def _get_humidity_and_temperature(self):
humidity, temperature = Adafruit_DHT.read_retry(
sensor=self.DHT_SENSOR,
pin=self.DHT,
retries=5
)
return (humidity, temperature)
def _get_soil_moisture(self):
time_taken = self._time_charging_soil_capacitor()
totally_wet_time = 4E-3
totally_dry_time = 0.9
moisture = (
math.log(time_taken / totally_dry_time) /
math.log(totally_wet_time / totally_dry_time)
)
return max(0, min(1, moisture)) * 100
def _time_charging_soil_capacitor(self):
pin = self.SOIL
GPIO.setup(pin, GPIO.OUT, GPIO.PUD_OFF)
GPIO.output(pin, GPIO.LOW)
sleep(0.1)
start_time = time()
GPIO.setup(pin, GPIO.IN)
max_time = 1
while GPIO.input(pin) == GPIO.LOW and time() - start_time < max_time:
pass
end_time = time()
time_taken = end_time - start_time
return time_taken
def _get_light_level(self):
time_taken = self._time_charging_light_capacitor()
value = 100 * time_taken / self.darkness_level
return 100 - value
def _time_charging_light_capacitor(self):
pin = self.LIGHT
GPIO.setup(pin, GPIO.OUT)
GPIO.output(pin, GPIO.LOW)
sleep(0.1)
GPIO.setup(pin, GPIO.IN)
start_time = time()
end_time = time()
while (
GPIO.input(pin) == GPIO.LOW and
time() - start_time < self.darkness_level
):
end_time = time()
time_taken = end_time - start_time
return min(time_taken, self.darkness_level)
def _get_average_soil_moisture(self, num):
values = [self._get_soil_moisture() for n in range(num)]
average_value = sum(values) / len(values)
return average_value
def _get_average_light_level(self, num):
values = [self._get_light_level() for n in range(num)]
average_value = sum(values) / len(values)
return average_value
def _get_timestamp(self):
dt = datetime.now()
dt_date = str(dt.date())
dt_time = str(dt.time())
timestamp = "%s %s" % (dt_date, dt_time[:8])
return timestamp
def record_sensor_values(self):
"""
Save sensor readings to database
"""
timestamp = self._get_timestamp()
temperature = self.temperature
humidity = self.humidity
soil = self.soil
light = self.light
values = (timestamp, temperature, humidity, soil, light)
self.db.record_sensor_values(values)
def export_to_csv(self, file_path='/home/pi/greenhouse.csv'):
"""
Export sensor data from database and save as CSV file in file_path
Defaults to /home/pi/greenhouse.csv
"""
self.db.export_to_csv(file_path)
