| Re: [wakaama-dev] Observe Method Problem |
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The uriP I was talking about is the one you pass as parameter to lwm2m_resource_value_changed(). BTW, Achim code sample has a small typo. It should be: lwm2m_uri_t uri; if (lwm2m_stringToUri("/3/0/9", 6, &uri)) { lwm2m_resource_value_changed(lwm2mH,
&uri); } You can see this code working in the test client using the command “change”. See
https://github.com/eclipse/wakaama/blob/master/tests/client/lwm2mclient.c#L312 Regards, David Navarro From: wakaama-dev-bounces@xxxxxxxxxxx [mailto:wakaama-dev-bounces@xxxxxxxxxxx]
On Behalf Of Ugur Kirbac Hi, Do you have any idea why uriP can be null considering I’m using the context iniitialized in the main? "Another possibility is that contextP does not point to an actual lwm2m_context_t.” What is the actual lwm2m_context_t,
where can I pass it from? Do you know if Observe method was tested with some dynamic data? If yes, any clue how? Alternatively, I use OMA Mozilla addon and it works pretty well for notifying the resource updates. I
wanted to experiment with Wakaama with Raspberry PI2 but apparently Observe method doesn’t work for me. I will give it a try for awhile before I give up on Wakaama. Cheers From:
<Navarro>, David Even if targetP is null, a segfault can not occur as tests are performed. Maybe it is the uriP with is null ? This one is not tested. Another possibility is that contextP does not point to an actual lwm2m_context_t. Regards, David Navarro From:
wakaama-dev-bounces@xxxxxxxxxxx [mailto:wakaama-dev-bounces@xxxxxxxxxxx]
On Behalf Of Ugur Kirbac Hello David, Actually my update() method is invoked when server sends an Observe or Read request to the client inside
static uint8_t prv_accelerometer_read. In addition to that, I have debugged the code and contextP is not actually null inside prv_getObservedList()
However, as I mentioned eariler, targetP
returns NULL so targetP->uri.objectId
gives segmentation fault
Has anybody got Observe method working for any object? Thanks From:
<Navarro>, David Hi Ugur, maybe your update() function is called before the lwm2m_context_t is initialized ? The only to have a segfault in
prv_getObservedList() is by having a null contextP. Regards, David Navarro From:wakaama-dev-bounces@xxxxxxxxxxx
[mailto:wakaama-dev-bounces@xxxxxxxxxxx]
On Behalf Of Ugur Kirbac Thanks again Achim, I have done already exactly what you suggested but the problem is that when I create the lwm2m_context_t
* after initialization and pass it to lwm2m_resource_value_changed through a global variable, the segmentation fault occurs in the method below. targetP
= contextP->observedList; is basically NULL.
Any suggestion about it? Thanks From:
"Kraus Achim (INST/ESY4)" Hi, to call void lwm2m_resource_value_changed(lwm2m_context_t * contextP, lwm2m_uri_t * uriP) you need a "lwm2m_context_t *", which is the result of the initial call of lwm2m_context_t * lwm2m_init(lwm2m_connect_server_callback_t connectCallback, lwm2m_buffer_send_callback_t bufferSendCallback, void * userData) This is usually called during initialization (see „lwm2mclient/main.c“) and may be shared via a global variable or set by calling specific user defined function into the different modules after the lwm2m_init call.
Mit freundlichen Grüßen / Best regards Achim Kraus Bosch Software Innovations GmbH Communications (INST/ESY4) Stuttgarter Straße 130 71332 Waiblingen GERMANY Registered office: Berlin, Register court: Amtsgericht Charlottenburg, HRB 148411 B Executives: Dr.-Ing. Rainer Kallenbach; Michael Hahn Von:wakaama-dev-bounces@xxxxxxxxxxx
[mailto:wakaama-dev-bounces@xxxxxxxxxxx]
Im Auftrag von Ugur Kirbac Thanks for the quick reply, Where should I use “lwm2m_resource_value_changed”? When I try to use it in
object_temperature.c, I get a segmentation fault. I’m not sure how to get the context pointer “lwm2mH” inside object_temperature.c. Any idea? Thanks From:
"Kraus Achim (INST/ESY4)" Hi, only changing the „float temperature“ is not detected by the wakaama core. If you change a resource, you must call „lwm2m_resource_value_changed“
with the associated uri. e.g.
lwm2m_uri_t uri; if (lwm2m_stringToUri("/3/0/9", 6, &uri)) { lwm2m_resource_value_changed(lwm2mH, uri); }
to inform the core about a battery level change (uri „/3/0/9“). Mit freundlichen Grüßen / Best regards Achim Kraus Bosch Software Innovations GmbH Communications (INST/ESY4) Stuttgarter Straße 130 71332 Waiblingen GERMANY Registered office: Berlin, Register court: Amtsgericht Charlottenburg, HRB 148411 B Executives: Dr.-Ing. Rainer Kallenbach; Michael Hahn Von:wakaama-dev-bounces@xxxxxxxxxxx
[mailto:wakaama-dev-bounces@xxxxxxxxxxx]
Im Auftrag von Ugur Kirbac Hello, I’m currently experimenting a Leshan server and Wakaama client. I have been trying to get Observe method working for Wakaama client however I couldn’t
manage it so far. First, I tried to observe the device object and I haven’t seen any notification from Wakaama client to Leshan server. After that, I created two IPSO Objects and update the values using a timer because right now I don’t have any real sensor
connected to the client so I’m kinda faking the resources. The code I used for updating is the below.
Is there any problem with Observe method in Wakaama client? Any suggestion? I have also attached an image showing the CoAP Messages logs for Leshan server on the browser. Cheers --------------------------------------------------------------------- This e-mail and any attachments may contain confidential material for --------------------------------------------------------------------- This e-mail and any attachments may contain confidential material for --------------------------------------------------------------------- This e-mail and any attachments may contain confidential material for |