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?

[AndreasF]

Hi again Armand.

According to my calculations the scan duration for each channel is 261.12 ms if i'm not wrong. So you have to multiply that by how many channels you scan in order to get the whole duration.

Best regards,

Andreas

[Ignacio]

Many Thanks!