nrf54l10 zigbee R23 sleepy end device behavior

[hyojoon]

Dear all 

I am developing a product using the nRF54L10 with the Zigbee add-on v1.2.0.
I have a question regarding sleep behavior.

The current measurements below show the power consumption of the actual device
when start_network_rejoin() is not started at the time of ZB_BDB_SIGNAL_DEVICE_FIRST_START after boot.
The average current consumption is about 7 µA.

However, when the device is booted and start_network_rejoin() is initiated at ZB_BDB_SIGNAL_DEVICE_FIRST_START,
and there is no network available, stop_network_rejoin() is called after 200 seconds.
What I am wondering is whether the device does not enter sleep mode after this point, because the current consumption does not drop.
My code is below 

void ws_zigbee_init(void)
{
	ws_zigbee_print_information();

	test_aes();

	set_tx_power();
	zigbee_erase_persistent_storage(false);

	zb_set_ed_timeout(ED_AGING_TIMEOUT_8MIN);
	zb_set_keepalive_timeout(ZB_MILLISECONDS_TO_BEACON_INTERVAL(120*1000));

	zigbee_configure_sleepy_behavior(true);

	app_clusters_attr_init();
	ias_zigbee_fota_init(ota_evt_handler);

	ZB_AF_REGISTER_DEVICE_CTX(&ias_zone_ctx);

	ZB_ZCL_REGISTER_DEVICE_CB(zcl_device_cb);
	ZB_AF_SET_IDENTIFY_NOTIFICATION_HANDLER(ZB_HA_IAS_ZONE_ENDPOINT, identify_cb);
	zb_zcl_ias_zone_register_cb(ZB_HA_IAS_ZONE_ENDPOINT, NULL, ias_zone_general_cb);

	LOG_INF("IAS Zone windows sensor Start");

	/* Power off unused sections of RAM to lower device power consumption. */
	if (IS_ENABLED(CONFIG_RAM_POWER_DOWN_LIBRARY)) {
		power_down_unused_ram();
	}

	zigbee_enable();
}

I have no experience with Zigbee. I am not sure whether this behavior is normal or not.
If it is not, I would like some guidance on how to reduce the current consumption.

[Elfving]

Hi,

To start off I just want to mention that the case is open. If that was not your intention I can make it private. 

To reduce power consumption, then making it a sleepy end device (SED) is a good idea (I see also that there are more general power consumption tips here), though I believe zb_set_rx_on_when_idle(ZB_FALSE) is how it is supposed to be done in the add-on SDK. Could you try this?

Regards,

Elfving

[hyojoon]

Hi Elfving 

void zigbee_configure_sleepy_behavior(bool enable)
{
	if (enable) {
		zb_set_rx_on_when_idle(ZB_FALSE);
		LOG_INF("Enabled sleepy end device behavior.");
	} else {
		zb_set_rx_on_when_idle(ZB_TRUE);
		LOG_INF("Disabling sleepy end device behavior.");
	}
}

The part you mentioned has already been applied.
So when the Zigbee device successfully joins the network, it draws an average of about 14 µA.
What I mean is that in the current add-on SDK, if the device fails to join the network after start_join_network, even when stop_join_network is called, the current still does not drop.

Best.
Hyojoon

[hyojoon]

Is there really no one who can tell me about this?

[Elfving]

Sorry about the wait Hyojoon,

hyojoon said:

The part you mentioned has already been applied.

Ah right. In that case I do not see that you are missing anything. Though it might be that you do actually have to be connected to a network first, and that start_network_rejoin() is mainly for when you were already connected. I am uncertain about that. 

Are you seeing the same issue with something like the Zigbee: Light switch sample, which is meant to be able to demonstrate the sleeping behavior?

Regards,

Elfving

[hyojoon]

Yes, the light switch example shows the same behavior—the current does not drop either.