def __init__(self):
# photoresistor connected to adc #0
self.photo_ch = 2
GPIO.setwarnings(False)
GPIO.cleanup() # clean up at the end of your script
GPIO.setmode(GPIO.BCM) # to specify whilch pin numbering system
# set up the SPI interface pins
GPIO.setup(WaterLevel.SPIMOSI, GPIO.OUT)
GPIO.setup(WaterLevel.SPIMISO, GPIO.IN)
GPIO.setup(WaterLevel.SPICLK, GPIO.OUT)
GPIO.setup(WaterLevel.SPICS, GPIO.OUT)
self.mqtt_client = Publisher(self.TOPIC + os.environ['DEVICE_NAME'],
'waterlevel')
self.collector()
def __init__(self):
# Setup the GPIO board
GPIO.setmode(GPIO.BCM)
# Setup the switch pin
# SWITCH = 20
# GPIO.setup(SWITCH, GPIO.OUT)
self.mqtt_client = Publisher(self.TOPIC + os.environ['DEVICE_NAME'],
'moisture')
self.mcp = Adafruit_MCP3008.MCP3008(clk=Moisture.CLK,
cs=Moisture.CS,
miso=Moisture.MISO,
mosi=Moisture.MOSI)
self.collector()
class Moisture():
# Software SPI configuration:
CLK = 11
MISO = 9
MOSI = 10
CS = 8
DELAY_INTERVAL = 2
TOPIC = 'sensor/moisture/'
def __init__(self):
# Setup the GPIO board
GPIO.setmode(GPIO.BCM)
# Setup the switch pin
# SWITCH = 20
# GPIO.setup(SWITCH, GPIO.OUT)
self.mqtt_client = Publisher(self.TOPIC + os.environ['DEVICE_NAME'],
'moisture')
self.mcp = Adafruit_MCP3008.MCP3008(clk=Moisture.CLK,
cs=Moisture.CS,
miso=Moisture.MISO,
mosi=Moisture.MOSI)
self.collector()
def read(self):
# GPIO.output(SWITCH, GPIO.HIGH)
time.sleep(0.1)
value = float(self.mcp.read_adc(1))
# print("The soil moisture reading is currently at {:.2f}%").format(value / 1023 * 100)
# GPIO.output(SWITCH, GPIO.LOW)
return value
def collector(self):
print('Start collecting moisture data')
try:
while True:
value = self.read()
self.mqtt_client.publish_sensor_data("moisture", value)
sleep(Moisture.DELAY_INTERVAL)
except:
GPIO.cleanup()
class DHT:
DELAY_INTERVAL = 2
TOPIC = 'sensor/dht/'
def __init__(self):
self.mqtt_client = Publisher(self.TOPIC + os.environ['DEVICE_NAME'],
'dht')
self.collector()
def read(self):
h, t = dht.read_retry(dht.DHT22, 4)
if h is not None and t is not None:
return '{0:0.1f}*C'.format(t), '{0:0.1f}%'.format(h)
else:
print('failed to retrieve the data')
def collector(self):
print('start collecting air sensor data')
while True:
temp_value, hum_value = self.read()
self.mqtt_client.publish_sensor_data("dht_temp", temp_value)
self.mqtt_client.publish_sensor_data("dht_hum", hum_value)
sleep(DHT.DELAY_INTERVAL)
class LDR:
# change these as desired - they're the pins connected from the
# SPI port on the ADC to the Cobbler
SPICLK = 11
SPIMISO = 9
SPIMOSI = 10
SPICS = 8
DELAY_INTERVAL = 2
TOPIC = 'sensor/light/'
def __init__(self):
# photoresistor connected to adc #0
self.photo_ch = 0
GPIO.setwarnings(False)
GPIO.cleanup() # clean up at the end of your script
GPIO.setmode(GPIO.BCM) # to specify whilch pin numbering system
# set up the SPI interface pins
GPIO.setup(LDR.SPIMOSI, GPIO.OUT)
GPIO.setup(LDR.SPIMISO, GPIO.IN)
GPIO.setup(LDR.SPICLK, GPIO.OUT)
GPIO.setup(LDR.SPICS, GPIO.OUT)
self.publisher = Publisher(self.TOPIC + os.environ['DEVICE_NAME'], 'ldr')
self.collector()
# read SPI data from MCP3008(or MCP3204) chip,8 possible adc's (0 thru 7)
def readadc(self, adcnum, clockpin, mosipin, misopin, cspin):
if (adcnum > 7) or (adcnum < 0):
return -1
GPIO.output(cspin, True)
GPIO.output(clockpin, False) # start clock low
GPIO.output(cspin, False) # bring CS low
commandout = adcnum
commandout |= 0x18 # start bit + single-ended bit
commandout <<= 3 # we only need to send 5 bits here
for i in range(5):
if commandout & 0x80:
GPIO.output(mosipin, True)
else:
GPIO.output(mosipin, False)
commandout <<= 1
GPIO.output(clockpin, True)
GPIO.output(clockpin, False)
adcout = 0
# read in one empty bit, one null bit and 10 ADC bits
for i in range(12):
GPIO.output(clockpin, True)
GPIO.output(clockpin, False)
adcout <<= 1
if (GPIO.input(misopin)):
adcout |= 0x1
GPIO.output(cspin, True)
adcout >>= 1 # first bit is 'null' so drop it
return adcout
def collector(self):
print('start collecting data')
while True:
adc_value = self.readadc(self.photo_ch, LDR.SPICLK, LDR.SPIMOSI, LDR.SPIMISO, LDR.SPICS)
self.publisher.publish_sensor_data("ldr", adc_value)
sleep(LDR.DELAY_INTERVAL)
def __init__(self):
self.mqtt_client = Publisher(self.TOPIC + os.environ['DEVICE_NAME'],
'dht')
self.collector()