I was using a project by Mike Davis (A Raspberry Pi Data Logger for about $25 (Temperature Probe and ThingSpeak).. All is working fine for one sensor but I have 3 and am unable to figure out a loop to get it to upload all three. I can see all three sensors in the /devices/ directory. Any help would be appreciated.


Here is code from Mike I'm using:

import os


import glob


import time


import sys


import datetime


import urllib2




baseURL = "https://api.thingspeak.com/update?api_key=YOURAPIKEY"




#initiate the temperature sensor


os.system('modprobe w1-gpio')


os.system('modprobe w1-therm')




#set up the location of the sensor in the system


base_dir = '/sys/bus/w1/devices/'


device_folder = glob.glob(base_dir + '28*')[0]


device_file = device_folder + '/w1_slave'




def read_temp_raw(): #a function that grabs the raw temperature data from the sensor


     f = open(device_file, 'r')


     lines = f.readlines()




     return lines




def read_temp(): #a function that checks that the connection was good and strips out the temperature


     lines = read_temp_raw()


     while lines[0].strip()[-3:] != 'YES':




         lines = read_temp_raw()


     equals_pos = lines[1].find('t=')


     if equals_pos !=-1:


         temp_string = lines[1][equals_pos+2:]


         temp_c = float(temp_string)/1000.0


         temp_f = temp_c * 9.0/5.0 + 32.0


         return temp_c




while True: #infinite loop


     tempin = read_temp() #get the temp


     values = [datetime.datetime.now(), tempin]


     g = urllib2.urlopen(baseURL + "&field1=%s" % (tempin))