zb_zdo_mgmt_nwk_update_req config error 0xFF

[Ignacio]

Hi,

Looking for some ground on getting the netowork parameters set for a zigbee device, My intention is to limit the number of scan intervals and the scan time to save power on a sleepy end device.

A snipped code call on the device startup (after zboss_start () is called) will return 0xFF on the mgmt_nwk_update_ok_cb. (ZB_ZDP_STATUS_TIMEOUT_BY_STACK). Chaning the buffer definition will cause an abort error when calling zb_zdo_mgmt_nwk_update_req. Code below:

void mgmt_nwk_update_ok_cb(zb_uint8_t param)
{
  zb_buf_t *buf = ZB_BUF_FROM_REF(param);
  zb_uint8_t *zdp_cmd = ZB_BUF_BEGIN(buf);
  zb_zdo_mgmt_nwk_update_notify_hdr_t *notify_resp = (zb_zdo_mgmt_nwk_update_notify_hdr_t *)zdp_cmd;

  NRF_LOG_INFO("notify_resp status %hd, scanned_channels %x %x, total_transmissions %hd transmission_failures %hd, scanned_channels_list_count %hd",
             notify_resp->status, notify_resp->scanned_channels,
             &notify_resp->scanned_channels + 1,
             notify_resp->total_transmissions, notify_resp->transmission_failures,
             notify_resp->scanned_channels_list_count);

  if (notify_resp->status == ZB_ZDP_STATUS_SUCCESS)
  {
    NRF_LOG_INFO("mgmt_nwk_update_notify received, Ok");
  }
  else
  {
    NRF_LOG_INFO("mgmt_nwk_update_notify received, ERROR incorrect status %x", notify_resp->status);
  }
  zb_free_buf(buf);
}

static zb_void_t set_network_parameters(void)
{
  zb_uint8_t  tsn;
  zb_buf_t*   p_buf;
  zb_zdo_mgmt_nwk_update_req_t *req;
  zb_uint8_t  param;

  ZB_BUF_INITIAL_ALLOC(p_buf, sizeof(zb_zdo_mgmt_nwk_update_req_t), req);
  param = ZB_REF_FROM_BUF(p_buf);

  req->hdr.scan_channels = IEEE_CHANNEL_MASK;
  req->hdr.scan_duration = 0x10;
  req->scan_count = ZB_DEFAULT_SCAN_DURATION;
//  req->update_id = ZB_NIB_UPDATE_ID();

  req->dst_addr = 0;

  tsn = zb_zdo_mgmt_nwk_update_req(param, mgmt_nwk_update_ok_cb);

  NRF_LOG_RAW_INFO("Network parameters set\r\n");
}

1. What is wrong with this code?

2. How can I modify the scan_duration and scan_count effectively.

3. When is it correct to call zb_zdo_mgmt_nwk_update_req function?

Thx

Armand

[AndreasF]

Hi.

What kind of device is running this code?

Is it a coordinator, router, end-device, sleepy-end-device?

What do you mean by scan interval?

Is the device trying to join the network, or have it already joined the network?

Best regards,

Andreas

[Ignacio]

Thanks Andreas for your valuable contribution.

I am running the light switch example code. I set the device to be a sleepy end device.

My aims is to reduce the power consumption. At the moment the device is trying to join a network at all times. I would like to limit the number of scanning attempts and the total time scanning. Then reactivate the scan when a button is pressed.

In this scenario,. the device has not yet joined any network. When it has already joinned a network I will think of way to reduce power consumption in the case the device cannot rejoin.

Regards

[Patrick]

Is this what you're looking for? ZDO Rejoin Backoff

[Ignacio]

Hi Patrick,

Thanks for your contribution. It seems that your are pointing to the rejoin backoff procedure. I am interested to know if it is possible to set the number of times a device will try to join a network and the ammount of time that the device will be scanning for a network. My device will run on a battery and it requires to save power. I would like it to limit the ammount of time it tries to join a network after a input event (e.g. button pressed). TI is also using ZBOSS and they define a variable known as bdbScanDuration

http://dev.ti.com/tirex/content/simplelink_zigbee_sdk_plugin_2_20_00_06/docs/zigbee_user_guide/doxygen/zstackapi/html/struct__zstack__bdbgetattributesrsp__t.html

At the moment the light bulb samples are either trying to join or rejoin at all times.Let's see if Andreas can help me with this.

[AndreasF]

Hi Armand.

If you take a look at examples\zigbee\light_control\light_switch.

You join the network by calling bdb_start_top_level_commissioning() inside the function light_switch_retry_join().

This function is called when you either: reboot or leave the network in the zboss_signal_handler()

To delay the joining procedure, simply change the ZB_SCHEDULE_ALARM delay from ZB_TIME_ONE_SECOND to the time you want by multiplying it by the number of seconds, for example ZB_TIME_ONE_SECOND * 20 for 20 seconds.

If you want to limit the number of times you can try to join just implement a counter which counts the number of attemps you make and you can reset it by pressing a button for example.

Best regards,

Andreas

[Ignacio]

Thanks Andreas. Just to close this case successfully. A follow-up query:

When you call bdb_start_top_level_commissioning()  how long does the stack scans each channel? Is that a fixed period?