Problems with zigbee attribute reporting octet string size

[jamiechengDH]

Hello,

I am running on a NRF52840 DK a Zigbee program configured as a router. For the coordinator i am using the cli example from the SDK.

On the router, I have developed my own custom cluster that is similar to the multisensor example. The difference i made is that instead of reporting a attribute u16 value, i report an octet string.

After binding the coordinator from the cli, i can correctly see that i receive the report. However, i can only set the octet string attribute value with a value of maximum 7 bytes(excluding the size byte). When i try to report a larger value, the router does not transmit anything. The coordinator does not show a report and my zigbee sniffer does not show packets either.

For setting the attribute value i use the function zb_zcl_set_attr_val() and for setting the octet string value i use the function zb_zcl_string_append_data().

In the zigbee specification i have not found something about the maximum size of an octet string yet. Is there something i need to configure before reporting an octet string value?

[Marjeris Romero]

Hi,

I am sorry for the late answer here. Zigbee types are described in the ZCL specification, look for chapter 2.6.2 Data Types.

It states that the lenght of the octec string is defined in the first octet.

You can also try ot use long octec string, where you can define the length using the first two octets.

Best regards,

Marjeris

[jamiechengDH]

Hello Marjeris,

Thanks for the reply. We are most likely going to switch to OpenThread instead of Zigbee, since it works quite well in OpenThread. I think i can go further from now.

Regards,

Jamie