Zigbee reconnection speed for multi-channel is slow

[Dunliang]

Hi，

I am using nRF54L15-DK for Zigbee light_stwitch startup testing. After successfully connecting the development board to the Hub for the first time, I evaluated the time from booting up to reconnecting to the Hub by clicking the RESET button.

After adding the following configuration, the time delay from each boot to successful Zigbee reconnection is about 5 seconds (default configuration is about 1 second):

CONFIG_ZIGBEE_CHANNEL_SELECTION_MODE_MULTI=y
CONFIG_ZIGBEE_CHANNEL_MASK=0x3FE0000

Best Regards
Dwenliang Weng

[Kazi Afroza Sultana]

Hello,

The device log doesn't really give much information about the problem unfortunately. If you have a nRF52840 Dongle or DK, or nRF5340 DK they can use our nRF Sniffer for 802.15.4.

[Dunliang]

Fullscreen light_switch.log Download

[2025-06-09 09:35:40.560]
RX：I: nRF5 802154 radio initialized
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
I: Starting Zigbee R23 Light Switch example
I: Zigbee R23 Light Switch example started
I: Production configuration is not present or invalid (status: -1)
I: Zigbee stack initialized

[2025-06-09 09:35:45.371]
RX：I: Unimplemented signal (signal: 56, status: 0)
I: Joined network successfully on reboot signal (Extended PAN ID: 35f8be00b1eb94cc, PAN ID: 0xa88a)

[2025-06-09 09:35:47.398]
RX：I: Found bulb addr: 0 ep: 1

[2025-06-09 10:02:28.029]
RX：II: nRF5 802154 radio initialized
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
I: Starting Zigbee R23 Light Switch example
I: Zigbee R23 Light Switch example started
I: Production configuration is not present or invalid (status: -1)
I: Zigbee stack initialized
I: Device started for the first time
I: Start network steering
I: Started network rejoin procedure.

[2025-06-09 10:02:57.327]
RX：I: Unimplemented signal (signal: 56, status: 0)

[2025-06-09 10:02:57.917]
RX：I: Unimplemented signal (signal: 55, status: 0)
I: Joined network successfully (Extended PAN ID: 35f8be00b1eb94cc, PAN ID: 0xa88a)
I: Network rejoin procedure stopped as NOT scheduled.

[2025-06-09 10:03:00.005]
RX：I: Found bulb addr: 0 ep: 1

[2025-06-09 10:03:07.320]
RX：I: Bulb not found, try again

[2025-06-09 10:03:12.952]
RX：I: nRF5 802154 radio initialized
*** Booting nRF Connect SDK v2.9.0-7787b2649840 ***
*** Using Zephyr OS v3.7.99-1f8f3dc29142 ***
I: Starting Zigbee R23 Light Switch example
I: Zigbee R23 Light Switch example started
I: Production configuration is not present or invalid (status: -1)
I: Zigbee stack initialized

[2025-06-09 10:03:17.772]
RX：I: Unimplemented signal (signal: 56, status: 0)
I: Joined network successfully on reboot signal (Extended PAN ID: 35f8be00b1eb94cc, PAN ID: 0xa88a)

[2025-06-09 10:03:19.810]
RX：I: Found bulb addr: 0 ep: 1

light_switch.pcapngThe DK's ID is 0x70d4.Rejion time ranges from [10:03:12] to [10:03:17], approximately 5 seconds.