Matter ICD example (contact sensor example) not change to LIT mode with Apple home kit

[sangphan]

I build contact sensor example (use nrf connect sdk v3.2.1, nrf52840 chip) and try commissioning with apple home kit (use homepod mini), device commissioning succeed but cannot change to LIT mode

 00> rtt:~$
< ot pollperiod
00> ot pollperiod
00> 5000
00>
00> Done

i try difference way to commissioning (use chip tool with command: ./chip-tool pairing ble-thread....--icd-registration true ) it change to LIT mode

00> rtt:~$
< ot pollperiod
00> ot pollperiod
00> 236000 
00>
00> Done

So please let me known why LIT mode not work with  Apple homekit , and how to solve this problem

Thanks for your help

[Susheel Nuguru]

Hi Sang, 

Can you make sure if the ICD is enabled in your build 
(CONFIG_CHIP_ENABLE_ICD_SUPPORT=y, CONFIG_CHIP_ICD_LIT_SUPPORT=y).

If you need LIT with HomeKit only, then I think it depends on HomeKit support for ICD registration. Please try with the latest iOS/HomePod firmware, or use chip-tool to perform ICD registration after HomeKit commissioning.

[sangphan]

Hi Susheel,

I build example from Nordic It already have (check on .config)

CONFIG_CHIP_ENABLE_ICD_SUPPORT=y

CONFIG_CHIP_ICD_LIT_SUPPORT=y

I dont know why Homekit isn't performing ICD registration with my device. (I check my homepod  mni, it have newest firmware 26.2)

By the way, i dont know how to use chip-tool to perform ICD registration after HomeKit commissioning 

I try command: ./chip-tool pairing code <node_id> <apple_share_code> but not work 

Cold u guide me "use chip-tool to perform ICD registration after HomeKit commissioning."

Thank alot

 

[Susheel Nuguru]

I did not use it myself but here is the documentation I know of about interactive mode with chip-tool https://docs.nordicsemi.com/bundle/ncs-latest/page/matter/chip_tool_guide.html#interactive-mode 

The intro does not show much, but there is an example on how to subscribe to events and attributes later in the guide: https://docs.nordicsemi.com/bundle/ncs-latest/page/matter/chip_tool_guide.html#subscribing-to-event…

sangphan said:

I dont know why Homekit isn't performing ICD registration with my device. (I check my homepod  mni, it have newest firmware 26.2)

This seems to be controller behavior. If the controller doesn’t register as an ICD client, the device must stay in SIT. That’s exactly what you’re seeing. The fact that chip-tool can trigger LIT confirms your firmware should be fine. Apple’s controller may not implement ICD registration yet for this device type, I am not sure.

[sangphan]

Thanks alot for the documentation of chiptool, it very helpful.

I already add config:

CONFIG_CHIP_DEVICE_TYPE=21 (contact sensor)

but Homekit still doesn’t register as an ICD client.

[Hieu]

Hi sangphan,

Susheel is out of office, and I will try to help in the meantime. I am however just a novice at Matter and don't have any Apple device to try the information I am referencing, so please bear with me.

Could you please commission the device with --icd-registration true and see if Homekit can register itself as an ICD client?

Hieu

[sangphan]

Hi Hiếu,

Thanks for reply, I aleady test:

- Fist, Commissioning device with Apple homekit (homepod mini, I see device have 2 fabric id, may be both Homepod and Iphone commissioning). But device dont witch to LIT

- Affter that, I share the  Apple code for chiptool and continue commisioning with chiptool (with --icd-registration true). Device can switch to LIT.

[Hieu]

Hi sangphan,

What I mean is, is there no similar feature like --icd-registration true on Homekit?

[sangphan]

Hi Hieu,

So it mean Apple dont support ICD device? If so, do you know any ecosystem support ICD device ?

I want to test ICD device with real ecosystem (like Apple, Google, Samsung....)

[Marte Myrvold]

Hi,

It looks like Samsung supports it based on their release notes:

Enable support for Matter’s Intermittently Connected Device Long-Idle Time (ICD LIT) feature

https://community.smartthings.com/t/58-x-hub-v2-v3-customer-beta-release-notes/304707 

Best regards,
Marte