I'm trying to get my RPi to send temp data to Xively and I'm having a horrible time getting my code to work. This is the latest reponse I get when I run the python script... Can someone explain to me what this means and what I need to do to correct? Thanks. Answer The xively module is expecting the

What Does This Output Represent?

I’m trying to get my RPi to send temp data to Xively and I’m having a horrible time getting my code to work. This is the latest reponse I get when I run the python script…

Traceback (most recent call last):
File "xively1.py", line 11, in <module>
import xively               # for Xively 
File "/home/pi/xively/xively.py", line 11, in <module>
FEED_ID = os.environ["736915202"]
File "/usr/lib/python2.7/UserDict.py", line 23, in __getitem__
raise KeyError(key)
KeyError: '736915202'

Can someone explain to me what this means and what I need to do to correct? Thanks.

#!/usr/bin/env python

# This program reads two DS18B20 1-wire temperature sensors and sends the values to
# Xively  https://xively.com/feeds/360495937

# tempF[0] is the reading from the outdoor tempersture sensor '28-0000059f6ece'
# tempF[1] is the reading from the indoor temperature sensor '28-0000059fa9ce'
outdoor = 0
indoor = 1

import xively               # for Xively
import time
import datetime
import os                   # for 1-wire
import glob                 # for 1-wire

def read_temp_raw(): #a function that grabs the raw temperatures data from the sensors
    f_1 = open(device_file[0], 'r') # first DS18B20
    lines_1 = f_1.readlines()
    f_1.close()
    f_2 = open(device_file[1], 'r') # second DS18B20
    lines_2 = f_2.readlines()
    f_2.close()
    return lines_1 + lines_2

def read_temp(): #a function that checks that the connections were good
    lines = read_temp_raw()
    while lines[0].strip()[-3:] != 'YES' or lines[2].strip()[-3:] != 'YES':
        time.sleep(0.2)
        lines = read_temp_raw()
    equals_pos = lines[1].find('t='), lines[3].find('t=')
    tempC = float(lines[1][equals_pos[0]+2:])/1000, float(lines[3]    [equals_pos[1]+2:])/1000
    tempF =  round(tempC[0] * 9.0 / 5.0 + 32.0,1), round(tempC[1] * 9.0 / 5.0 + 32.0,1)
    return  tempF
def send_to_Xively(TempF):
    XIVELY_FEED_ID = "736915202"
    XIVELY_API_KEY = "QA6mqStQIqCFLOXtA4tzxiFpv8cqHNaYr1MFjRZdrphGwxYN"
#def send_to_Xively(TempF):
    now = datetime.datetime.utcnow()
    try:
        print "Sending to Xively...",
        xivelyapi = xively.XivelyAPIClient(XIVELY_API_KEY)
        xivelyfeed = xivelyapi.feeds.get(XIVELY_FEED_ID)
        xivelyfeed.datastreams = [
          xively.Datastream(id='temp0', current_value=round(TempF[outdoor],1), at=now),
          xively.Datastream(id='temp1', current_value=round(TempF[indoor],1), at=now)
        ]
        xivelyfeed.update()
        print "OK"
    except requests.HTTPError as e:
        print "HTTPError({0}): {1}".format(e.errno, e.strerror)

# this part for the 1-wire DS18S20
os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')

#set up the locations of the sensors in the system
device_folder = glob.glob('/sys/bus/w1/devices/28*')
device_file = [device_folder[0] + '/w1_slave', device_folder[1] + '/w1_slave']

# main program
TempF = read_temp()
send_to_Xively(TempF)

Answer

The xively module is expecting the environment variable “736915202” to be set. It’s not, so it’s throwing an exception.

That seems like a very strange environment variable to have set, though. Is /home/pi/xively/xively.py a third-party module, or did you write it? If you wrote that file, but you expected calling import xively to import a third-party module, you should rename /home/pi/xively/xively.py to something else, and that will probably fix your problem.

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Answer