The character string greater than 40 symbols cannot be read by the attribute read command, Zigbee

RE: The character string greater than 40 symbols cannot be read by the attribute read command, Zigbee

AnnaR — Thu, 30 Apr 2020 13:56:20 GMT

Hi Marjeris,

Thank you for the clarification.

Sincerely,

Anna

RE: The character string greater than 40 symbols cannot be read by the attribute read command, Zigbee

Marjeris Romero — Thu, 30 Apr 2020 13:18:24 GMT

Hi Anna,

Please disregard my previous answer. I got and answer from the Zigbee team now:

"Customer's observations are correct, ZCL payload is limited to 48 bytes and it can not be changed. It is limited to this value to make sure that all optional fields of packet,if present, will fit in the single buffer."

RE: The character string greater than 40 symbols cannot be read by the attribute read command, Zigbee

Marjeris Romero — Thu, 30 Apr 2020 11:11:37 GMT

Hi Anna,

Sorry for the late reply, I am looking into this, there is no a lockdown of the ZCL payload in the stack as far as I know but I have asked our Zigbee team to confirm this. Payload length will also depend for instance on the available memory of the zboss buffer, if there is not enough free memory, 'failure' is returned.

Do you have sniffer trace which shows the attribute read response send from the device?

Best regards,

Marjeris