Hello IoTivity developers.
I would like to ask you for help. We are evaluating IoTivity platform for our 
test&measurement platform and I would like to ask you few questions which are 
not clear to me yet.

We have for example measurement station which contains our sensors(can measure 
pressure, force, acceleration and torque). Some of them can host IoTivity 
directly and connect to cloud, but some of them not.

?         Other IoT platforms provides ?gateway?. This gateway uses 
adapters(drivers) in which you can implement logic for data transformation. For 
example, 3rd party camera uploads xml with ocr information and picture to ftp 
server. I need to host this FTP server in an adapter and when device uploads 
the file, I parse this xml, transform to json and send this message to IoT 
platform in the name of that device. How should I handle these type of devices 
with IoTivity? I was not ablemto find something similar.

IoTivity supports cloud deployment. Devices which wants to communicate with the 
cloud has to sign-up. After they are authorized, they can communicate with 
Cloud Interface. I found two examples. One is aircon_controlle and if I 
understand IoTivity correctly, it is both server and client, which can change 
it?s state (on/off).

?         Is this state stored both locally and also on cloud side in resource 
dictionary?

It is required for us to send many telementry messages from station sensors 
(and gateway) to cloud / from station sensors to station infield server. This 
messages has to be queued, in correct order and delivered.

?         How is this done? Is Kafka used for this purpose?

?        Is messaging done through Cloud Interface -> Message Queue -> Kafka?

?         How are intermittent connections handled ?

?         On the cloud side, we will have a microservice which will receive 
these messages and route it to correct microservice. Is it only client which 
will subscribe to the specific topic?

?         Is it possible to allow subscribing only from internal network of 
cloud and publishing from sites?



Sorry for many questions, but we have many requirements which as far as I see 
IoTivity can fulill. But I am not sure how exactly. Documentation has few gaps 
which I will try to update later.



Thank you.

Ondrej Tomcik @ Kistler


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