Posting Property Updates from a Raspberry PI with Python Using REST

Hi Bill,

Thanks for posting this useful article and code.

I am trying to post data from PI to thingworx(Version7.2) server on VM.

I have followed the above mentioned process and I was succesfull in sending data to local thingworx server with the help of Postman.

But i am facing two issues.

1.(Issue on Rapberry PI)

  I have tried below steps.

  2. from the PI run 'sudo pip install requests' -(Result: Successful)

  3. from the PI run 'sudo pip install logging' -(Result: Successful)

  4. from the PI run 'sudo pip install http_client' --(Result: Failure)

  When I am trying to execute step 4 , I am getting one issue. Please find screenshot (fig 1.1)

Further I tried executing python code on PI, its giving error as Permission denied.

  Please find screenshot (fig 1.2)

2. (Issue while posting data on VM using REST call and Postman)

  When I am trying to push data on VM, I am getting issue as 403 Forbidden.

  And on thingworx log I can see "Error occurred while validating HTTP header: cookie" this error.

  Please find screenshot (fig 1.3)

Please help if I am missing something here

Thanks in advance

Thanks,

Sachin Dhawane.

Hi Bill ,

       i have tried what you explained in this blog but getting an error

Thanks & regards

        Pravin

Try this approach. Add this line to python script, this line will push the data to Thingworx.

r = requests.put("http://localhost:8080/Thingworx/Things/TempAndHumidityThing/Properties/(name_of_the_property&remove_brackets)?method=put&value=45", auth=('your_username', 'your_password'),headers=headers)     

for ex.

r = requests.put("http://localhost:8080/Thingworx/Things/TempAndHumidityThing/Properties/PropTemp?method=put&value=45", auth=('abc', 'xyz'),headers=headers)     

you can also print the response code to verify whether data sent or not. below is the python script to print the status

print "Response code {0} ".format(r.status_code)

Thanks,

Sachin Dhawane.

Hi sachin Dhawane,

  for permission denied. use  Sudo bash or sudo su (which makes you to execute command in root mode)

regards

Dinesh

Thanks sachin for reply

      i tried the same but its giving the error code 400, how to solve it? is it bcoz of server problm?

Hi,

few hack trics,

lets see whether it works out or not.

1. Try using IP/hostname instead of localhost

2. Make sure Thingworx server is up and running

3. Make sure that there exist such property in Thing as what we said in URl(here in our case "PropTemp" property should present in Thing TempAndHumidityThing)

4. Put headers in python script file as below

headers ={'Content-Type': 'application/xml'}

It will be great if you could share your python script( only if possible).

import requests

import json

import logging

import sys

# These two lines enable debugging at httplib level (requests->urllib3->http.client)

# You will see the REQUEST, including HEADERS and DATA, and RESPONSE with HEADERS but without DATA.

# The only thing missing will be the response.body which is not logged.

try:

    import http.client as http_client

except ImportError:

    # Python 2

    import httplib as http_client

http_client.HTTPConnection.debuglevel = 1

# You must initialize logging, otherwise you'll not see debug output.

logging.basicConfig()

logging.getLogger().setLevel(logging.DEBUG)

requests_log = logging.getLogger("requests.packages.urllib3")

requests_log.setLevel(logging.DEBUG)

requests_log.propagate = True

#NYP Webserver URL in Thingworx

NYP_Webhost = "wss://Thingworx/WS"

App_Key = "041403e1-1c3d-4849-b133-52b3b1f4a7c5"

ThingName = 'TempAndHumidityThing'

headers = { 'Content-Type': 'application/json', 'appKey': App_Key }

payload = { 'Prop_Temperature': 45, 'Prop_Humidity': 33 }

#response = requests.put('http://localhost:8080/Thingworx/Things/' + ThingName + '/Properties/*', headers=headers, json=payload, verify=False)

r = requests.put("http://localhost:8080/Thingworx/Things/TempAndHumidityThing/Properties/PropTemp?method=put&value=45", auth=('Administrator', 'admin'),headers=headers)

print "Response code {0} ".format(r.status_code)

I have tried all possibility's/tricks you mentioned before this but take a look at the code it is same as bill's code "test.py"

Hi,

I hope you are executing python script on Raspberry pie. And if you are running script on Pie then you must have to provide hostname or IP instead of localhost

e.g

r = requests.put("http://ppradhan.itc.net:8080/Thingworx/Things/TempAndHumidityThing/Properties/PropTemp?method=put&value=45", auth=('Administrator', 'admin'),headers=headers)

And update header also in your file. keep it as below

headers ={'Content-Type': 'application/xml'}

If it worked out then OK, otherwise will need to investigate more.

Hi just a quick question, does thingworx have or support pyhton SDK?