Can I test CoAP sensor with Java CoAP client for MacOS? Please provide the steps?
Yes, you can. This is command line tool that can be run on MacOS, Linux and Windows.
You will need to install Java 8 and either download or build the sdkcoapclient(sdkcoapclient-1.1.0.one-jar.jar) and follow these steps:
1) Create a Gateway session
2) Ping your HDK
3) Read the temperature sensor
4) Request a CoAP observe on the temperature sensor (and push the data to the Data Platform)
Is it possible to disable the default SSN network securty(net_mgr V2) for the CoAP client while establishing a gateway session ?
Yes. You can. The session options are passed as query string parameters ,there you need to disable the security parameter by setting it to 'none'.