====== v2 with cpu measurement ======

  #!/usr/bin/env python3
  
  import sqlite3
  
  import os
  import time
  import glob
  
  from urllib import request
  from re import findall
  from time import sleep
  from subprocess import check_output
  
  myAPI = 'G8QE22SD7OB49PRT'
  baseURL = 'https://api.thingspeak.com/update?api_key=%s' % myAPI
  
  
  # global variables
  speriod=(15*60)-1
  
  
  # get temerature
  # returns None on error, or the temperature as a float
  def get_temp(devicefile):
  
      try:
          fileobj = open(devicefile,'r')
          lines = fileobj.readlines()
          fileobj.close()
      except:
          return None
  
      # get the status from the end of line 1
      status = lines[0][-4:-1]
  
      # is the status is ok, get the temperature from line 2
      if status=="YES":
          print(status)
          tempstr= lines[1][-6:-1]
          tempvalue=float(tempstr)/1000
  #        print(tempvalue)
          return tempvalue
      else:
          print("There was an error.")
          return None
  
  
  #get cpu temperatute
  def get_temp_cpu():
      temp_cpu = check_output(["vcgencmd","measure_temp"]).decode()
      temp_cpu = float(findall('\d+\.\d+', temp_cpu)[0])
      return(temp_cpu)
  
  # main function
  # This is where the program starts
  def main():
  
  
  #log cpu temperature
      temp_cpu = get_temp_cpu()
      conn = request.urlopen(baseURL + '&field2=%s' % (temp_cpu))
      print(str(temp_cpu))
      conn.close()
  
  # enable kernel modules
      os.system('sudo modprobe w1-gpio')
      os.system('sudo modprobe w1-therm')
  
      # search for a device file that starts with 28
      devicelist = glob.glob('/sys/bus/w1/devices/28*')
      if devicelist=='':
          return None
      else:
          # append /w1slave to the device file
          w1devicefile = devicelist[0] + '/w1_slave'
  
  
  #    while True:
  
      # get the temperature from the device file
      temperature = get_temp(w1devicefile)
      if temperature != None:
          print("temperature="+str(temperature))
          conn = request.urlopen(baseURL + '&field1=%s' % (temperature))
          print(str(temperature))
          conn.close()
          sleep(1)
      else:
          # Sometimes reads fail on the first attempt
          # so we need to retry
          temperature = get_temp(w1devicefile)
          print("temperature="+str(temperature))
          conn = request.urlopen(baseURL + '&field1=%s' % (temperature))
          print(str(temperature))
          conn.close()
          sleep(1)
  
  if __name__=="__main__":
      main()
  



====== v1 without cpu measurement ======


  #!/usr/bin/env python3
  
  import sqlite3
  
  import os
  import time
  import glob
  
  from urllib import request
  from re import findall
  from time import sleep
  from subprocess import check_output
  
  myAPI = 'G8QE22SD7OB49PRT'
  baseURL = 'https://api.thingspeak.com/update?api_key=%s' % myAPI
  
  
  # global variables
  speriod=(15*60)-1
  
  
  # get temerature
  # returns None on error, or the temperature as a float
  def get_temp(devicefile):
  
      try:
          fileobj = open(devicefile,'r')
          lines = fileobj.readlines()
          fileobj.close()
      except:
          return None
  
      # get the status from the end of line 1
      status = lines[0][-4:-1]
  
      # is the status is ok, get the temperature from line 2
      if status=="YES":
          print(status)
          tempstr= lines[1][-6:-1]
          tempvalue=float(tempstr)/1000
  #        print(tempvalue)
          return tempvalue
      else:
          print("There was an error.")
          return None
  
  # main function
  # This is where the program starts
  def main():
  
      # enable kernel modules
      os.system('sudo modprobe w1-gpio')
      os.system('sudo modprobe w1-therm')
  
      # search for a device file that starts with 28
      devicelist = glob.glob('/sys/bus/w1/devices/28*')
      if devicelist=='':
          return None
      else:
          # append /w1slave to the device file
          w1devicefile = devicelist[0] + '/w1_slave'
  
  
  #    while True:
  
      # get the temperature from the device file
      temperature = get_temp(w1devicefile)
      if temperature != None:
          print("temperature="+str(temperature))
          conn = request.urlopen(baseURL + '&field1=%s' % (temperature))
          print(str(temperature))
          conn.close()
          sleep(1)
      else:
          # Sometimes reads fail on the first attempt
          # so we need to retry
          temperature = get_temp(w1devicefile)
          print("temperature="+str(temperature))
          conn = request.urlopen(baseURL + '&field1=%s' % (temperature))
          print(str(temperature))
          conn.close()
          sleep(1)
  
  if __name__=="__main__":
      main()