sudo nano /etc/modprobe.d/raspi-blacklist.conf

sudo apt-get install python-setuptools
sudo easy_install pip
sudo pip install ubidots 

sudo apt-get install python-dev
mkdir py-spidev
cd py-spidev
wget https://raw.github.com/doceme/py-spidev/master/setup.py
wget https://raw.github.com/doceme/py-spidev/master/spidev_module.c
sudo python setup.py install

git clone https://github.com/adafruit/Adafruit_Python_DHT.git
sudo python Adafruit_Python_DHT/setup.py install

sudo reboot

cd Adafruit_Python_DHT/examples
sudo python AdafruitDHT.py 2302 4

#!/usr/bin/env pythonimport time 						# Library for delaysimport RPi.GPIO as GPIO 			# Library for using the GPIO portsfrom  math import log1p,exp,log10 	# Library for math functions. No need for it if you'll get the raw data from the sensorsfrom ubidots import ApiClient  		# Ubidots Libraryimport Adafruit_DHT 				# Library from Adafruit to simplify the use of DHT sensor.# Set up the SPI interface pins. Through SPI we can connect to the ADC MCP3008SPICLK = 18SPIMISO = 24SPIMOSI = 23SPICS = 25GPIO.setmode(GPIO.BCM) 				# Set up BCM as numbering system for inputsGPIO.setup(SPIMOSI, GPIO.OUT)		# Configure the SPI I/OGPIO.setup(SPIMISO, GPIO.IN)GPIO.setup(SPICLK, GPIO.OUT)GPIO.setup(SPICS, GPIO.OUT)# Setup VariablesdS = None 							# Ubidots Data source. We'll call Airpisensor = Adafruit_DHT.AM2302			# Especify the DHT sensor we will use 									# You can change this line for other DHT sensors like this: Adafruit_DHT.DHT11 or Adafruit_DHT.DHT22light = 0 							# Save  value of the LDRnoise = 0 							# Save value of the Mic inno2 = 0 							# Save value for Nitrogen dioxide levelco = 0 								# Save value for Carbon monoxide levelhum = 0 								# Save value for Humiditytemperature = 0 						# Save value for Temperaturevin = 3.3  							# Voltage reference for the ADC    # Function to verify if the variable exists or not in your Ubidots accountdef getVarbyNames(varName,dS):	for var in dS.get_variables():		if var.name == varName:			return var	return None# Function from Adafruit to read analog valuesdef readadc(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# Code to connect a Ubidotstry:   api = ApiClient("75617caf2933588b7fd0da531155d16035138535") # Connect to Ubidots. Don't forget to put your own apikey      for curDs in api.get_datasources():						# Check if there's any Data Source with the name AirPi	if curDs.name == "AirPi":		dS = curDs		break   if dS is None:   	  dS = api.create_datasource({"name":"AirPi"})			# If doesn't exist it'll create a Data Source with the name Airpi     lightValue = getVarbyNames("Light_level",dS)   if lightValue is None:	  lightValue = dS.create_variable({"name": "Light_level","unit": "lux"}) # Create a new Variable for light   nitrogen = getVarbyNames("Nitrogen_dioxide_concentration",dS)   if nitrogen is None:	  nitrogen = dS.create_variable({"name": "Nitrogen_dioxide_concentration", "unit": "ppm"}) # Create a new Variable for NO2 level   mic = getVarbyNames("Noise_level", dS)   if mic is None:	  mic = dS.create_variable({"name": "Noise_level","unit": "mV"}) # Create a new Variable for noise level   carbon = getVarbyNames("Carbon_monoxide_concentration",dS)   if carbon is None:	  carbon = dS.create_variable({"name": "Carbon_monoxide_concentration","unit": "ppm"}) # Create a new Variable for CO level     temp = getVarbyNames("Temperature",dS)   if temp is None:	  temp = dS.create_variable({"name": "Temperature", "unit": "C"})	#Create a new Variable for temperature   humidity = getVarbyNames("Humidity",dS)   if humidity is None:	  humidity = dS.create_variable({"name": "Humidity","unit": "%"}) # Create a new Variable for humidityexcept:   print("Can't connect to Ubidots")while True:    # Code to get light levels data	light = readadc(0, SPICLK, SPIMOSI, SPIMISO, SPICS) # Read the analog pin where the LDR is connected	light = float(light)/1023*vin						# Voltage value from ADC	light = 10000/((vin/light)-1)						# Ohm value of the LDR, 10k is used as Pull up Resistor	light = exp((log1p(light/1000)-4.125)/-0.6704)		# Linear aproximation from http://pi.gate.ac.uk/posts/2014/02/25/airpisensors/ to get Lux value		# Code to get audio levels from  20 hz frequency	signalMax = 0	signalMin = 1024 	startMillis = int(round(time.time()*1000))			# Time in milliseconds	while (int(round(time.time()*1000))-startMillis<50):    # Collect data for 20hz frequency, 20hz=1/50ms    		noise = readadc(4, SPICLK, SPIMOSI, SPIMISO, SPICS) # Read the analog input where the mic is connected		if (noise < 1024):			if(noise > signalMax):				signalMax = noise			elif(noise < signalMin):				signalMin = noise	peakToPeak = signalMax - signalMin	print peakToPeak					# Peak to Peak value	db = float((peakToPeak*vin*1000)/1023)			#Measure in mV	time.sleep(0.1)		# Code to read NO2 and CO concentrations	no2 = readadc(2, SPICLK, SPIMOSI, SPIMISO, SPICS)	# Read the analog input for the nitrogen value		no2 = float(no2)/1023*vin								# Voltage value from the ADC	no2 = ((10000*vin)/no2)-10000							# Ohm value of the no2 resistor, 10k  is used as pull down resistor 	no2 = float(no2/700)					#Reference value	time.sleep(0.1)		co = readadc(3, SPICLK, SPIMOSI, SPIMISO, SPICS)		# Read the analog input for the carbon value	co = float(co)/1023*vin 								# Voltage value from the ADC	co = ((360000*vin)/co)-360000							# Ohm Value of the co resistor, 360k is used as pull down resistor	co = float(co/30000) 					#Reference value	# Code to use the DHT sensor	hum, temperature = Adafruit_DHT.read_retry(sensor, 4)	if hum is not None and temperature is not None:        	print 'Temp={0:0.1f}*C  Humidity={1:0.1f}%'.format(temperature, hum)	else:        	print 'Failed to get DHT sensor reading. Try again!'		# Print sensor values to the console 	print "light[lux]:", light	print "no2[ohm]:", no2	print "co[ohm]:", co	print "noise[mv]", db 	# Post values to Ubidots	lightValue.save_value({'value':light})	nitrogen.save_value({'value':no2})	mic.save_value({'value':db})	carbon.save_value({'value':co})		temp.save_value({'value':temperature})	humidity.save_value({'value':hum})GPIO.cleanup()						# Reset the status of the GPIO pins

sudo python airpi.py