I did the following tutorial to connect my Raspberry Pi with an application on Bluemix using the IoT Foundation:
I had everything up and running except the client.py (step 36 in the tutorial). I got the following error message:
client.py:9: RuntimeWarning: This channel is already in use, continuing anyway. Use GPIO.setwarnings(False) to disable warnings.
GPIO.setup(17, GPIO.OUT)
Traceback (most recent call last):
File "client.py", line 23, in <module>
options = ibmiotf.application.ParseConfigFile("/home/pi/device.cfg")
File "/usr/local/lib/python2.7/dist-packages/ibmiotf/application.py", line 501, in ParseConfigFile
appType = parms.get(sectionHeader, "type", "standalone")
File "/usr/lib/python2.7/ConfigParser.py", line 618, in get
raise NoOptionError(option, section)
ConfigParser.NoOptionError: No option 'type' in section: 'application'
I found out the the error came from the missing "type" section in the config file (device.cfg).
The file structure listed in step 35 of the tutorial doesn't say, that you need a "type". I used the device type (raspberrypi) that I created before in the IoT Foundation.
Now I did connect to the IoT Foundation successfully.
The problem that I have now is, that nothing is happening when I either press the button on my Raspberry Pi or the "Turn light on/off" buttons of the web application.
If I check the logs of the python app using "./cf logs myappname -recent" I get the following output:
2016-01-29T08:38:49.10+0100 [App/0] OUT on
2016-01-29T08:38:49.10+0100 [App/0] ERR 75.126.37.74 - - [29/Jan/2016 07:38:49] "POST /light/on HTTP/1.1"; 302 -
2016-01-29T08:38:49.34+0100 [App/0] ERR 75.126.52.20 - - [29/Jan/2016 07:38:49] "GET / HTTP/1.1"; 200 -
2016-01-29T08:38:49.56+0100 [RTR/1] OUT myappname.mybluemix.net - [29/01/2016:07:38:49 +0000] "GET / HTTP/1.1" 200 0 751 "http://myappname.mybluemix.net/" ";Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/47.0.2526.111 Safari/537.36" 108.168.250.151:39460 x_forwarded_for:"46.5.2.236"x_forwarded_proto:"http" vcap_request_id:myrequestid response_time:0.31228492 app_id:myapp_id x_global_transaction_id:mytransactionid;
2016-01-29T08:40:08.32+0100 [App/0] OUT off
2016-01-29T08:40:08.33+0100 [App/0] ERR 75.126.37.74 - - [29/Jan/2016 07:40:08] "POST /light/off HTTP/1.1" 302 -
2016-01-29T08:40:08.51+0100 [App/0] ERR 75.126.23.243 - - [29/Jan/2016 07:40:08] "GET / HTTP/1.1" 200 -`
The writer of the tutorial, Jeff, said that I should double check that the Pi and the app in Bluemix are both listening on the same topic. And in the IoT service I should be able to see messages coming through.
I don't know what this means or how I do this.
We already had an discussion about my problems in the comment section of the youtube video of the blog post (https://www.youtube.com/watch?v=YHDhn5hGnn8) and Jeff told me we should move to StackOverflow with it (makes sense).
I appreciate your help.
// edit for additional information // This is the output I get on the Pi, when I start the application: sudo python client.py
2016-02-01 14:36:23,221 ibmiotf.application.Client WARNING Unable to encrypt messages because TLSv1.2 is unavailable (MQTT over SSL requires at least Python v2.7.9 or 3.4 and openssl v1.0.1)
2016-02-01 14:36:23,716 ibmiotf.application.Client INFO Connected successfully: A:69wm3f:aaaafdsfsd45641safsda2313
If I press the on/off buttons for the first time after the client has started I get the following output on the Pi:
Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_inner
self.run()
File "/usr/lib/python2.7/threading.py", line 505, in run
self.__target(*self.__args, **self.__kwargs)
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2287, in _thread_main
self.loop_forever()
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1261, in loop_forever
rc = self.loop(timeout, max_packets)
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 811, in loop
rc = self.loop_read(max_packets)
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1073, in loop_read
rc = self._packet_read()
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1475, in _packet_read
rc = self._packet_handle()
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1943, in _packet_handle
return self._handle_publish()
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2118, in _handle_publish
self._handle_on_message(message)
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2268, in _handle_on_message
t[1](self, self._userdata, message)
File "/usr/local/lib/python2.7/dist-packages/ibmiotf/application.py", line 423, in __onDeviceEvent
if self.deviceEventCallback: self.deviceEventCallback(event)
File "client.py", line 17, in myCommandCallback
command = cmd.payload["d"]["command"]
TypeError: string indices must be integers, not str
It looks like the messages from the IoT Foundation are reaching the client.
I set the following IDs on the IoT Foundation, the environment variable of the Bluemix Python app and on the Raspberry Pi:
All three IDs are the same.
// edit 2 // Logging output after adding the print cmd statements from the comment section:
<ibmiotf.application.Event instance at 0x76526738>
light
{"command": "on"}
Stacktrace after changing
command = cmd.payload["d"]["command"]
to
command = cmd.payload["command"]
Exception in thread Thread-1:
Traceback (most recent call last):
File "/usr/lib/python2.7/threading.py", line 552, in __bootstrap_inner
self.run()
File "/usr/lib/python2.7/threading.py", line 505, in run
self.__target(*self.__args, **self.__kwargs)
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2287, in _thread_main
self.loop_forever()
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1261, in loop_forever
rc = self.loop(timeout, max_packets)
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 811, in loop
rc = self.loop_read(max_packets)
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1073, in loop_read
rc = self._packet_read()
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1475, in _packet_read
rc = self._packet_handle()
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 1943, in _packet_handle
return self._handle_publish()
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2118, in _handle_publish
self._handle_on_message(message)
File "/usr/local/lib/python2.7/dist-packages/paho/mqtt/client.py", line 2268, in _handle_on_message
t[1](self, self._userdata, message)
File "/usr/local/lib/python2.7/dist-packages/ibmiotf/application.py", line 423, in __onDeviceEvent
if self.deviceEventCallback: self.deviceEventCallback(event)
File "client.py", line 18, in myCommandCallback
command = cmd.payload["command"]
TypeError: string indices must be integers, not str
Turns out the IBM IoT Foundation library changed in the way it parses JSON...
Change line 15
command = cmd.payload["d"]["command"]
to
payload = json.loads(cmd.payload)
command = payload["command"]