Resolving Issue #25 Observe in client is not working

[srikumaresan]

Resolving issue related to CoAP client not working with observe

[srikumaresan]

Issue 25 relates to the client not being able to use the Observe functionality. This is the result of each interaction being deleted once a single response is received due to the following state machine in the client:

If instead, the client can return to the COAP_STATE_WAITING_RESPONSE after getting a response, and requeues the interaction, the client can continue to observe a resource.

Please note, issue 25 comments suggest a similar solution. However, in the if condition of the solution, the observe value is checked to be >0, but on registering the value is equal to 0 so it does not resolve the bug.