Memory requirements

Note

Zigbee R22 is currently in maintenance mode, and it is not recommended to use it for new Zigbee designs. While critical bug fixes and security updates will be provided as necessary, it will not receive any enhancements or new features. The Zigbee R23 add-on represents Nordic’s primary solution for future Zigbee developments, offering improvements, support for new features, and support for the nRF52840 SoC and new platforms such as the nRF54L series.

This page provides information about the amount of flash memory and RAM that is required by the Samples, as well as stack memory requirements for main and zboss threads. Use it to check if your application has enough space for a given configuration. Values are provided for ZBOSS libraries.

Samples were built using the available ZBOSS Zigbee stack. Unless stated otherwise, the default prj.conf was used.

RAM and flash memory requirements

RAM and flash memory requirement values differ depending on the DK, and the programmed sample.

The following tables list memory requirement values for Zigbee samples.

Values are provided in kilobytes (KB). n/a indicates that the sample with the given variant is not supported on the DK.

nRF52840nRF52833nRF5340nRF21540nRF52840 Dongle

The following table lists memory requirements for samples running on the nRF52840 DK (nrf52840dk).

Sample	ROM, ZBOSS stack + App	ROM, MCUboot bootloader	ROM, ZBOSS non-volatile memory	ROM, ZBOSS product config	Total ROM	RAM, ZBOSS stack + App	Total RAM
Network coordinator	339	0	32	4	375	72	72
Light bulb	363	0	32	4	399	58	58
Light switch	282	0	32	4	318	53	53
Light switch with Zigbee FOTA	298	48	32	4	382	61	61
Light switch with Multiprotocol Bluetooth LE extension	395	0	32	4	431	69	69
Light switch with Multiprotocol Bluetooth LE extension and Zigbee FOTA	411	48	32	4	495	76	76
NCP	358	0	32	4	394	84	84
NCP with USB transport	376	64	32	4	476	93	93
Zigbee application template	338	0	32	4	374	67	67
Zigbee shell	417	0	32	4	453	84	84
Zigbee shell over USB	435	0	32	4	471	93	93

Stack memory requirements

The following table lists stack memory requirement values for main and zboss threads. These measurements were carried out with Zephyr’s Thread analyzer, using the following Kconfig options for configuration:

• For the stack memory size of the main thread - CONFIG_MAIN_STACK_SIZE

• For the stack memory size of the zboss thread - CONFIG_ZBOSS_DEFAULT_THREAD_STACK_SIZE

Values are provided in bytes (B).

nRF52 SeriesnRF53 Series

The following table lists memory requirements for the nRF52 Series devices.

Sample	main thread stack usage	main thread stack size	zboss thread stack usage	zboss thread stack size
Network coordinator	688	2048	968	2048
Light bulb	688	2048	968	2048
Light switch	672	2048	968	2048