Observe in client is not working about lobaro-coap

[nzfarmer]

I found our version (slightly early than the tip) also was not working and have added a hack to get us over the line. See below. After the handler is invoked, we check to ensure it is not observable before deleting the interaction:

coap_main.c:620 (Just after calling Handler!)

                    // Add support for Client based requests with the Observer option
                    // Check if response has the Observe flag, and reset state.
                    // Ensure we don't remove original Request as it is required for token comparison!
                    if ((GetObserveOptionFromMsg(pIA->pRespMsg,&obsVal) == COAP_OK) && obsVal > 0) 
                     {
                       pIA->State              = COAP_STATE_WAITING_RESPONSE;
                       pIA->pReqMsg->Type      = NON;
                       pIA->pReqMsg->Timestamp = hal_rtc_1Hz_Cnt();
                       RemoveObserveOptionFromMsg(pIA->pRespMsg);
                       CoAP_SetSleepInteraction(pIA, POSTPONE_WAIT_TIME_SEK);
                       CoAP_EnqueueLastInteraction(pIA);
                    } else {
                       CoAP_DeleteInteraction(pIA); //direct delete, todo: eventually wait some time to send ACK instead of RST if out ACK to remote reponse was lost
                    }

[srikumaresan]

Was this ever resolved? I seem to be having the same issue still today.

[baw-benji]

No not to my knowledge.
I'm using the workaround suggested by @nzfarmer .