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CC2652P: Zigbee Fragment can't receive the fragment packet with 0xFF DstEndPoint. In SDK 8.30

Aries Lord — Fri, 12 Jun 2026 03:37:02 GMT

Part Number: CC2652P

A CC2652P send a fragment packet(aps data is 90 byte) to another CC2652P and DstEndPoint is 0xFF, the other CC2652P can't receive this packet. And the sender CC2652P will wait for long time(more than 15s) and trigger AF_DATA_CONFIRM with failure status.

RE: CC2652P: Zigbee Fragment can't receive the fragment packet with 0xFF DstEndPoint. In SDK 8.30

Ryan Brown1 — Fri, 12 Jun 2026 12:52:29 GMT

Hi Aries,

The APS fragmentation layer of the Z-Stack source libraries will discard fragmented packets if the endpoint is not registered into the endpoint description list, which applies to the 0xFF broadcast endpoint. To work around this limitation you can send the fragmented packets to a direct registered endpoint or break up the large APS packet outside of the packet fragmentation feature context. I have not further looked into what would happen if the 0xFF endpoint were attempted to be registered by the application. The delay for AF_DATA_CONFIRM failure will depend on whether APS ACK is enabled and Packet Sending parameters set in SysConfig (like NWK Data Retries, APS Retries, and APC ACK Wait Duration)

Regards,
Ryan

CC2340R5: The CC2350R53 ZBOSS zigbee how to achieve a network scale of 128 nodes

baosong xie — Tue, 09 Jun 2026 04:24:41 GMT

Part Number: CC2340R5

SDK version: simplelink_lowpower_f3_sdk_9_14_02_16

Reference: zboss-user-guide

Configuration file	Usage	Maximum number of nodes
zb_mem_config_min.h	Simple applications and small networks.	16
zb_mem_config_med.h	Applications without huge demands on Zigbee features, for example broadcast transmissions, binding and group membership entries.	32
zb_mem_config_max.h	Complex applications and huge networks.	128

A large-scale network should be capable of accommodating 128 nodes.

However, using the configuration in zb_mem_config_max.h. The actual test ,the maximum number of nodes that the coordinator can connect to is only 31.

Increasing the NVRAM did not improve anything either,In the ZBOSS protocol stack, is it true that NV (Non-Volatile Memory) is limited to a maximum size of 8K? This results in the maximum network size being limited to 32.

RE: CC2340R5: The CC2350R53 ZBOSS zigbee how to achieve a network scale of 128 nodes

Ryan Brown1 — Thu, 11 Jun 2026 13:11:29 GMT

Do you have any sniffer logs or debugging stack return statuses of additional devices failing to join when the maximum 31 devices has been reached? How does the Zigbee network behave at this point? Are more devices allowed if ZR were introduced into the network? Although not your target device, have you tried a CC2745R10-Q1 LaunchPad to determine if the results are similar? Have you considered evaluating the latest F3 SDK v9.20 to determine whether the results are similar?

[quote userid="655090" url="~/support/wireless-connectivity/zigbee-thread-group/zigbee-and-thread/f/zigbee-thread-forum/1653445/cc2340r5-the-cc2350r53-zboss-zigbee-how-to-achieve-a-network-scale-of-128-nodes/6376709"]I have tested that the coordinator can connect to a maximum of 31 routers.I have also tested that the coordinator can connect a maximum of only 31 end device nodes.[/quote]

Is it only 31 maximum withany given combination of ZR and ZED, and are all ZR/ZED directly neighboring/associating with the ZC or for example can ZED join through other ZR?

Zigbee R&D has suggested that ZB_DEFAULT_MAX_CHILDREN might be hardcoded to 32U in zb_config_common.h from the pre-built libraries of this SDK. They have suggested potentially fixing this by calling zb_set_max_children(MAX_CHILDREN) in the ZC application after ZB_INIT() and before zboss_start_no_autostart(). Can you please implement this workaround and give feedback on its efficacy? And could you also provide a debug print of gc_neighbor_table_size at runtime after stack initialization? This would provide further evidence.

Regards,
Ryan

RE: CC2340R5: The CC2350R53 ZBOSS zigbee how to achieve a network scale of 128 nodes

baosong xie — Thu, 11 Jun 2026 02:34:59 GMT

Only the SYSCFG configuration file was changed, but the zb_mem_config_lprf3.h file was not modified.

RE: CC2340R5: The CC2350R53 ZBOSS zigbee how to achieve a network scale of 128 nodes

Ryan Brown1 — Wed, 10 Jun 2026 13:56:01 GMT

I do not think the NVS memory is the issue in your current setup. I would like to further understand your changes to the zb_mem_config_* implementation inside of the TI Zigbee example projects. Can you please provide your application .c file, Sysconfig, and any changes to zb_mem_config_lprf3.h for review?

Regards,
Ryan

RE: CC2340R5: The CC2350R53 ZBOSS zigbee how to achieve a network scale of 128 nodes

baosong xie — Wed, 10 Jun 2026 01:38:27 GMT

I have tested that the coordinator can connect to a maximum of 31 routers.I have also tested that the coordinator can connect a maximum of only 31 end device nodes.The "Network Maximum Children" parameter in syscfg is set to 128. I found that when the coordinator uses the default NVS value 0x1000 of the SYSCFG , The coordinator can connect to a maximum of only a few dozen nodes,If the size of NVS is changed to 0x2000, the coordinator can connect up to 31 nodes, But continuing to increase the size of NVS does not change the number of nodes joined the coordinator. I know that the NV of the coordinator will store the link keys and IEEE address information of each joined node, So I'm wondering if the NVS space is what limits the network size of the coordinator? I am using the CC2340R53. Its RAM has a capacity of 64K, so it should not be the RAM space limitation that restricts the network scale of the coordinator.

RE: CC2340R5: The CC2350R53 ZBOSS zigbee how to achieve a network scale of 128 nodes

Ryan Brown1 — Tue, 09 Jun 2026 13:23:43 GMT

Hi baosong,

Here is additional information on the Zigbee stack RAM usage configuration. As SimpleLink F3 SDK Zigbee projects have ZB_CONFIGURABLE_MEM defined in zb_vendor_lpf3_sdk.h, zb_mem_config_lprf3.h is referenced and uses ZB_CONFIG_LIGHT_TRAFFIC, ZB_CONFIG_APPLICATION_MODERATE, and MAX_CHILDREN (from ti_zigbee_config.h generated by SysConfig) which configure the definitions inside of the zb_mem_config_common.h file. Please make sure you are changing the appropriate locations of these definitions and confirm in a debug setting that these values are as you expect.

Currently it appears that the stack is configured to support a maximum of 32 nodes which produces the stop at 31 (plus local device itself). There should not be a NVRAM limitation which hinders the number of devices which can join, and the CC2340R53 is capable of supporting more than 32 Zigbee devices. Are you using a mesh network (i.e. routers) or do you have all ZED connecting directly to the ZC? Can you please share all changes you've applied to the baseline TI out-of-box example?

Regards,
Ryan

RE: CC2652R: Zigbee Range issue

srinivas muniswami — Thu, 21 May 2026 09:06:40 GMT

Hi Team,

Thanks, I have submitted my files for review to the following ID connectivity-24ghz-hw-review@list.ti.com

But there is no acknowledgement or response

Regards
Srinivas

CC2652R: Zigbee Range issue

srinivas muniswami — Wed, 20 May 2026 05:25:25 GMT

Part Number: CC2652R

Hi Team,

Continuing the discussion, As suggested we have tested the results. Kinldy find the attached test results in the document

Home_automation_Range_test_report.pdf

Kinldy check and share us your feedback to overcome the issues

Regards
Srinivas

RE: CC2652R: Zigbee Range issue

Ryan Brown1 — Wed, 20 May 2026 14:08:02 GMT

Hi srinivas,

You would need to submit your schematic and layout design files to SIMPLELINK-2-4GHZ-DESIGN-REVIEWS for further review since it is apparent with the range you are now observing that the external CC2592 power amplifier must be connected and controlled correctly since you are able realize up to 50 feet of range. Unfortunately this means that the PCB antenna design could be suboptimal which is resulting in poorer performance than expected.

Regards,
Ryan

RE: CC2652R: Zigbee Range issue

ZC — Wed, 20 May 2026 11:43:37 GMT

Hi Srinivas,

I took a quick look at your PCB layout in the previous thread you linked.

My initial impression is that the TI reference design layout hasn't been as closely followed as we would recommend. I would strongly advise submitting your design files for review using 2.4 GHz Design Review Submission: https://www.ti.com/tool/SIMPLELINK-2-4GHZ-DESIGN-REVIEWS

You can then get more targeted feedback and implement the changes. I'm not sure if that has been done yet, but should be as the first step if it hasn't.

Regards,

Zack

RE: CC2538-CC2592EMK: Electronic Door Lock - ZigBee Development Project

Ryan Brown1 — Tue, 19 May 2026 12:31:10 GMT

Hi Prince,

You should certainly be evaluating the CC23XX / CC27XX device family using the SimpleLink Low Power F3 SDK. Further device selection depends on whether a module is needed (coming later this year), output power (PA enabled devices for up to +20 dBm instead of +8 or +10 dBm maximum on non-PA devices), flash memory requirements (CC2340R5 has 512 kB whereas the CC2755x10 is , RAM restrictions (CC2340R5 is 36/64 kB whereas CC2755x10 is 162 kB), etc. You can reference the Datasheet and Technical Reference Manual (TRM) of each device for more information.

CC2340R5, LP-EM-CC2340R5
CC2755R10, LP-EM-CC2745R10-Q1
CC2755P10

Zigbee User's Guide
Zigbee SimpleLink Academy Labs
Zigbee DoorLock ZCL APIs

CC2340R5 CSA compliancy
CC27xx CSA compliancy

Regards,
Ryan

CC2538-CC2592EMK: Electronic Door Lock - ZigBee Development Project

Prince Tero — Tue, 19 May 2026 09:53:50 GMT

Part Number: CC2538-CC2592EMK

Hi TI Team,

I am reaching out on behalf of our engineering team as we are currently in the process of integrating a Zigbee antenna/module into our access control door lock system. We are exploring suitable Zigbee chip or module solutions and would like to request your support and proposal.

Below are our initial requirements:

A Zigbee chip or module compatible with integration into an electronic door lock system

Latest available Zigbee version and supported protocols
Electrical and mechanical specifications, including interface, pinout, power consumption, and antenna options
Security features, OTA capability, and certification compliance
Recommended development tools, SDKs, and documentation
Estimated pricing for samples and bulk orders
Lead time for samples and mass production
Technical support availability during development and coordination with our factory engineering team

We would appreciate it if you could provide your recommended solution along with the full technical specifications, datasheets, and commercial details. Our team is ready to coordinate further to ensure compatibility with our existing lock hardware.

Thank you in advance for your assistance. We look forward to your proposal and to the possibility of working together.

CC2755R10: Radio frequency plan

Flemming Noerskov Larsen — Wed, 29 Apr 2026 08:56:05 GMT

Part Number: CC2755R10

Are currently running a FCC approval, got a question on the radio frequency plan LO osc, IF freq. I guess frequencies are about the same as stipulated in "How to certify your Bluetooth Product". Please elaborate on this.

B.R.

Flemming Larsen

RE: CC2755R10: Radio frequency plan

Flemming Noerskov Larsen — Thu, 30 Apr 2026 06:53:05 GMT

Hello Alex

Reading the How to Certify Your Bluetooth Product (Rev. N) one more time I see the CC27XX products are covered

Thanks

Flemming

RE: CC2755R10: Radio frequency plan

Alex Fager — Wed, 29 Apr 2026 20:14:37 GMT

Hello Flemming Larsen,

Can you possibly provide the specific question or field for more context? The How to certify your Bluetooth Product should be a good document to reference for FCC certification.

Thanks,
Alex F

RE: CC2755R10: SW package with aliro standards

Ryan Brown1 — Tue, 28 Apr 2026 12:36:04 GMT

Hi robin,

There are currently no plans to support Aliro, however I have informed the Systems Team of this request so that it may be considered for the software roadmap.

Regards,
Ryan

CC2755R10: SW package with aliro standards

robin Moon — Tue, 28 Apr 2026 04:28:49 GMT

Part Number: CC2755R10

Hi experts,

My customer is looking for a device that meets the Aliro(CSA Standard).

https://csa-iot.org/all-solutions/aliro/

do you have any plans to provide aliro standard library among cc2755 or cc2340R5?

thanks

CC2530: After interference on the CC2530 P0_2/P1_0 pins, the power consumption becomes extremely high.

lu zheng — Wed, 22 Apr 2026 03:38:54 GMT

Part Number: CC2530

Hello!

We encountered the same configuration in a project where both P0_2 and P0_3 are configured as output low. Neither of these IOs is connected to any external device. When P0_2 is touched with tweezers, the power consumption increases dramatically. At this point, the measured voltage on this pin is around 0.63V. Touching P0_3 in the same way does not cause this issue. When this problem occurs, it can only be restored to normal by power cycling. Could you please help analyze what might be causing this and how to resolve it? We look forward to your reply.

Thank you!

RE: CC2530: After interference on the CC2530 P0_2/P1_0 pins, the power consumption becomes extremely high.

lu zheng — Fri, 24 Apr 2026 13:23:02 GMT

Thank you for your help. Unfortunately, we do not currently have a TI official evaluation board (EVM) on hand, so we are unable to perform this test.

Thanks.

RE: CC2530: After interference on the CC2530 P0_2/P1_0 pins, the power consumption becomes extremely high.

Ryan Brown1 — Fri, 24 Apr 2026 13:02:40 GMT

You can submit your design to SIMPLELINK-2-4GHZ-DESIGN-REVIEWS for further review. Have you replicated the issue with a TI EVM? I have no concerns with implementing a 10 nF capacitor on an unused IO if it resolves the issue for your system.

Regards,
Ryan

RE: CC2530: After interference on the CC2530 P0_2/P1_0 pins, the power consumption becomes extremely high.

lu zheng — Fri, 24 Apr 2026 05:48:21 GMT

Do you have any better solutions to resolve this issue?

Thanks

CC2652PSIP: Maximum total internal capacitance for ATEX certification

robin Moon — Wed, 22 Apr 2026 04:16:39 GMT

Part Number: CC2652PSIP

Hi experts,

My customer requested Maximum total internal capacitance of CC2652PSIP for ATEX certification.

Also, could you please provide us with a guide document for ATEX certification?

Thanks

RE: CC2652PSIP: Maximum total internal capacitance for ATEX certification

robin Moon — Thu, 23 Apr 2026 22:57:26 GMT

hi FI

They need the value of ATEX parameter as below for ATEX certification.

Please let me know the value for each parameter of CC2652PSIP.

thanks.