class DhtSensor(GenericSensor):
def __init__(self, iniSectionName):
try:
cfg = Config.DhtSensorConfig(iniSectionName)
self.cfg = cfg
self.temperature = None
self.humidity = None
self.error = None
# set up DHTXX Sensor object
self.sensor = DHTXX(pin=cfg.pin,
sensorType=eval(cfg.dht_type),
scale=eval(cfg.scale))
except Exception as ex:
# Handle other exceptions
print(type(ex))
print(ex.args)
print(ex)
raise (ex)
def read_raw(self):
return self.read()
def read(self):
dhtVal = self.sensor.read_and_retry()
if dhtVal.is_valid():
self.temperature = str(round(dhtVal.temperature, 1))
self.humidity = str(round(dhtVal.humidity, 1))
self.error = None
return dhtVal
else:
print("Error: %d" % resdhtValult.error_code)
self.temperature = None
self.humidity = None
self.error = dhtVal.error_code
return {"Error": dhtVal.error_code}
def readObj(self): # Need to override because we're returning two abjects
dhtVal = self.read()
if dhtVal.is_valid():
sensorResultDict1 = {
"description": self.cfg.description_temperature,
"sort": int(self.cfg.sort_temperature),
"type": self.cfg.type_temperature,
"field_name": self.cfg.field_name_temperature,
"format": self.cfg.format_temperature,
"reading": self.temperature
}
sensorResultDict2 = {
"description": self.cfg.description_humidity,
"sort": int(self.cfg.sort_humidity),
"type": self.cfg.type_humidity,
"field_name": self.cfg.field_name_humidity,
"format": self.cfg.format_humidity,
"reading": self.humidity
}
return [sensorResultDict1, sensorResultDict2]
class DhtSensor(GenericSensor):
def __init__(self, iniSectionName):
try:
cfg = Config.DhtSensorConfig(iniSectionName)
self.cfg = cfg
self.temperature = None
self.humidity = None
self.error = None
# set up DHTXX Sensor object
self.sensor = DHTXX(pin=cfg.pin,
sensorType=eval(cfg.dht_type),
scale=eval(cfg.scale))
except Exception as ex:
# Handle other exceptions
print(type(ex))
print(ex.args)
print(ex)
raise (ex)
def read_raw(self):
return self.read()
def read(self):
dhtVal = self.sensor.read_and_retry()
if dhtVal.is_valid():
self.temperature = str(round(dhtVal.temperature, 1))
self.humidity = str(round(dhtVal.humidity, 1))
self.error = None
return dhtVal
else:
print("Error: %d" % resdhtValult.error_code)
self.temperature = None
self.humidity = None
self.error = dhtVal.error_code
return {"Error": dhtVal.error_code}
import RPi.GPIO as GPIO
from dhtxx import DHTXX
from time import sleep
# initialize GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
# read data using GPIO #16 pin for a DHT22 sensor with results in FAHRENHEIT
instance = DHTXX(pin=16, sensorType=DHTXX.DHT22, scale=DHTXX.FAHRENHEIT)
print("Reading Sensor...")
result = instance.read_and_retry()
if result.is_valid():
print("Temperature: %-3.1f F" % result.temperature)
print("Humidity: %-3.1f %%" % result.humidity)
else:
print("Error: %d" % result.error_code)
GPIO.cleanup()
if not path.exists(RPGARDEN_LOG_FILE):
with open(RPGARDEN_LOG_FILE, mode='w') as logFile:
fieldnames = ['log_date', 'temperature', 'humidity',\
'soil_moisture','light']
logFile_writer = csv.writer(logFile)
logFile_writer.writerow(fieldnames)
# just read the sensors once and log it.
try:
moistureVal = moistureSensor.read()
print("Soil Moisture: %.2f" % moistureVal)
photoVal = photoSensor.read()
print("Light Sensor: %.2f" % photoVal)
dhtVal = dhtSensor.read_and_retry()
if dhtVal.is_valid():
print("Temperature: %-3.1f F" % dhtVal.temperature)
print("Humidity: %-3.1f %%" % dhtVal.humidity)
else:
print("Error: %d" % resdhtValult.error_code)
with open(RPGARDEN_LOG_FILE, mode='a') as logFile:
logFile_writer = csv.writer(logFile)
logFile_writer.writerow([datetime.datetime.now(), \
round(dhtVal.temperature,2), \
round(dhtVal.humidity,2),\
round(moistureVal,2), \
round(photoVal,2)])
print("\n")