Lwm2m - initialization issues(lwm2m Client Sample)

RE: Lwm2m - initialization issues(lwm2m Client Sample)

Hkhan7861 — Tue, 13 Dec 2022 14:59:06 GMT

Good afternoon

Thank you so much for the feedback. I was able to use what you suggested!

Kind regards,

Hassan

RE: Lwm2m - initialization issues(lwm2m Client Sample)

Didrik Rokhaug — Mon, 12 Dec 2022 13:57:44 GMT

Hi, and sorry for the late reply.

The documentation is a bit outdated. The lwm2m library no longer uses the custom float32_value_t and float64_value_t types.

Instead, they now use the regular float and double types.

Simply changing the type of the sensor_value is all that is needed to make the value appear in Leshan.

Please see this updated .diff

devzone.nordicsemi.com/.../0880.added_5F00_custom_5F00_sensor.diff

Best regards,

Didrik

RE: Lwm2m - initialization issues(lwm2m Client Sample)

Hkhan7861 — Fri, 09 Dec 2022 13:06:05 GMT

Please let me know about any feedback as to why Leshan isnt updating as well please. Thank you !

RE: Lwm2m - initialization issues(lwm2m Client Sample)

Hkhan7861 — Thu, 08 Dec 2022 12:16:21 GMT

Good day

I created another instance and the function was created as expected. Thank you for the suggestion! I am able to set the sensor values within my main.c file. The lwm2m_engine_set_float function returns 0 but I more often than not receive a timeout server side. Have you any idea how to reduce this?

RE: Lwm2m - initialization issues(lwm2m Client Sample)

Didrik Rokhaug — Wed, 07 Dec 2022 15:44:23 GMT

I tried to add a custom sensor myself to the lwm2m_client sample, following your code.

You can see the changes I made to the sample here: devzone.nordicsemi.com/.../added_5F00_custom_5F00_sensor.diff

Creating the second instance of the object works as expected, and I can see it appear in Leshan. When I read the sensor value, the callback is called. However, Leshan always shows the value as 0.0, even though the callback should change the value each time it is called.

But, I don't get the errors that you are seeing.

I'll reach out to our LwM2M experts to see if we are doing something wrong when setting the value.

RE: Lwm2m - initialization issues(lwm2m Client Sample)

Hkhan7861 — Tue, 06 Dec 2022 14:56:35 GMT

Good afternoon

Once I enable the generic or temperature sensors, how do I set the sensor values. The functions i'm using are not working. I intend to get temperatures from a UART, convert is to a double and then use

lwm2m_engine_set_float to set the sensor value. Is this the right way to do it? When I do this I get the above mentioned errors.

kind regards,

Hassan

RE: Lwm2m - initialization issues(lwm2m Client Sample)

Didrik Rokhaug — Tue, 06 Dec 2022 14:48:07 GMT

Is there a reason for why you don't use the temperature sensor object?

[quote user=""]I am aware that something must be added to the prj file to allow the use of the generic sensor(id:3300).[/quote]

Did you enable CONFIG_LWM2M_IPSO_GENERIC_SENSOR?

Are you modifying the lwm2m_client sample?

It already enables and uses the generic sensor object for the gas sensor. So you need to either increase the count (and use another instance), or disable the gas sensor from the sample.

RE: Lwm2m - initialization issues(lwm2m Client Sample)

Hkhan7861 — Tue, 06 Dec 2022 06:45:03 GMT

Thank you for the feedback!

Kind regards,

Hassan

RE: Lwm2m - initialization issues(lwm2m Client Sample)

Didrik Rokhaug — Mon, 05 Dec 2022 18:02:13 GMT

Hi,

I am looking into this, but need a day or two to test this myself.

Best regards,

Didrik