How to send messages between nodes in zigbee mesh?

RE: How to send messages between nodes in zigbee mesh?

Marte Myrvold — Thu, 25 Nov 2021 07:29:32 GMT

Hi Garo,

A callback registered with ZB_ZCL_REGISTER_DEVICE_CB will not be called when you send a packet. The best way to see if you are sending the packet would be to get a sniffer log of the network traffic. If you have an additional nRF52840 DK or Dongle, you can use nRF Sniffer for 802.15.4.

Best regards,

Marte

RE: How to send messages between nodes in zigbee mesh?

Garo Demergian — Wed, 24 Nov 2021 15:03:06 GMT

Hi Marte and thank you for your answer.

I have now tried the following:

static zb_void_t broadcast_msg(zb_bufid_t bufid, zb_uint16_t dataframe)

{

zb_uint16_t receiver_addr = 0xFFFF;

zb_uint8_t *_ptr = zb_zcl_start_command_header(

bufid,

ZB_ZCL_CONSTRUCT_FRAME_CONTROL(

ZB_ZCL_FRAME_TYPE_CLUSTER_SPECIFIC,

ZB_ZCL_NOT_MANUFACTURER_SPECIFIC,

ZB_ZCL_FRAME_DIRECTION_TO_SRV,

ZB_ZCL_ENABLE_DEFAULT_RESPONSE),

NULL,

NULL);

ZB_ZCL_PACKET_PUT_DATA32(_ptr, &dataframe);

zb_ret_t zb_ret = zb_zcl_finish_and_send_packet(

bufid,

_ptr,

receiver_addr,

ZB_APS_ADDR_MODE_16_ENDP_PRESENT,

m_dev_ctx.level_control_attr.current_level,

HA_DIMMABLE_LIGHT_ENDPOINT,

ZB_AF_HA_PROFILE_ID,

ZB_ZCL_CLUSTER_ID_ON_OFF,

NULL);

}

zb_ret_t zb_err_code = zb_buf_get_out_delayed_ext(broadcast_msg, 1, 0);

and on the receiving end I haven't changed anything, so I'm using:

ZB_ZCL_REGISTER_DEVICE_CB(zcl_device_cb);

Then I have some printfs in zcl_device_cb() to see if it fires, but my log prints doesn't print.

What could it be that I'm doing wrong? tell me if you need more information about my code.

Garo

RE: How to send messages between nodes in zigbee mesh?

Marte Myrvold — Tue, 23 Nov 2021 14:36:10 GMT

Hi Garo,

[quote user=""]But I haven't got the chance to see if this works because SEGGER complains that ZB_BUF_FROM_REF is undefined.[/quote]

This is because ZB_BUF_FROM_REF has been removed from the ZBOSS API in nRF5 SDK for Thread and Zigbee v4. See Zigbee stack migration guide: v3.2.0 to v4.0.0 for more information.

You can use zb_buf_get_out() to allocate an out buffer of the default size, or you can use zb_buf_get_out_delayed_ext() to allocate an out buffer and then call a callback when the buffer is available. I would recommend using the latter, and then call broadcast_msg() as callback:

zb_err_code = zb_buf_get_out_delayed_ext(broadcast_msg, dataframe, 0);

With broadcast_msg() something like this:

zb_void_t broadcast_msg(zb_bufid_t bufid, zb_uint16_t dataframe) {
    zb_uint8_t receiver_addr = 0xFFFF;

    zb_uint8_t* ptr = zb_zcl_start_command_header(bufid,
                                                  ...);
                                                  
    ZB_ZCL_PACKET_PUT_DATA32(ptr, &dataframe);
    zb_ret_t zb_ret = zb_zcl_finish_and_send_packet(bufid,
                                                    ptr,
                                                    receiver_addr,
                                                    ...);
}

Best regards,

Marte