Matter DNS-SD advertisement without BLE

[HolmanB]

Hello,

I am testing the Matter sample for a Door Lock over Wi-Fi. I could test it successfully applying a commissioning through BLE and sending commands for locking/unlocking operations through the CHIP tool and the Wi-Fi network. I used these commands:

 

# For Commissioning through BLE
$ ./chip-tool pairing ble-wifi <node_id> <ssid> <password> <pin_code> <discriminator>

# To unlock the door with an automatic lock after timeout, using a timed invoke Matter interaction
./chip-tool doorlock unlock-with-timeout <timeout> <node_id> <endpoint_id> --timedInteractionTimeoutMs <timeout_invoke>

But, in my project development, I need to follow these steps:

1. Connect the device to the Wi-Fi network.
2. Commission the device through DNS-SD using one of the following commands from the CHIP tool:

$ ./chip-tool pairing onnetwork <node_id> <pin_code>

$ ./chip-tool pairing code <node_id> <qrcode_payload-or-manual_code>

$ ./chip-tool pairing onnetwork-long <node_id> <pin_code> <discriminator>

 

All CHIP tool commands are here.

How can I modify the Door Lock example to disable the BLE and configure the DNS-SD advertisement, so that I can commission the device that was previously connected to the Wi-Fi network? 

Thank you for all the help you could provide for this issue. 

Best Regards,

Holman

[AHaug]

Hi,

Could you verify if you've been able to set up and provision your device into an IPV6 based network as described as a prerequisite for https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/matter/chip_tool_guide.html#commissioning-into-a-network-over-ip, i.e a non-Matter IPV6 network?

Kind regards,
Andreas

[HolmanB]

Hello Andreas,

Thanks for your quick response. Currently, I'm employing IPv6 link-local addressing to run the door sample, as my Router/Access Point isn't assigning global IPv6 addresses to the devices.

Best regards,

Holman

[AHaug]

Hi,

After discussing this with the Matter team you should be able to remove BLE configurations, functions and features from your project and only use Matter over OpenThread. The challenge lies in stripping all of this from the samples we provide and also to replace the existing BLE Fota that is present in the samples with another method of the.

Just make sure 

If you're able to for instance provision the device into a Thread network through https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/protocols/thread/overview/commissioning.html#openthread-commissioning, then it should be straight forward to provision the device to your Matter network connected to the same IP network through https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/matter/chip_tool_guide.html#step-6-commission-matter-device-into-an-existing-ip-network 

Kind regards,
Andreas

[HolmanB]

Hi Andreas,

Thanks for your response. Is there an alternative configuration for Matter that enables DNS-SD advertisement over Wi-Fi without the necessity of a Thread network?

Thank you and kind regards,

Holman

[AHaug]

Hi,

For a Matter device, the only ways to commission a device is over Bluetooth or over IP. The ladder requires that your device already is present in a IP based network, so for instance a Wifi network or a Thread network. How you commission your device into those initial IP based network will depend on your device and the network you want to commission it into

Unfortunately we don't have any samples that showcases this since IP based first time commissioning does not have a general solution due to it depending on the factors I mentioned initially

Kind regards,
Andreas

[HolmanB]

Hello Andreas,

Thanks for the information. In this context, does the Matter Stack for nRF Connect support enabling DNS-SD advertising over Wi-Fi, assuming that the Nordic MCU is previously connected to the Wi-Fi network?

Kind Regards,

Holman.

[Edvin]

Hello,

A colleague of mine actually did something similar. He told me:

Recently I made a similar example for a Matter Bridge that connected to Wi-Fi by Wi-Fi provisioning service, and connected to their own cloud. After connecting to Wi-Fi, the device is on the network and can be commissioned by DNS-SD advertisement without BLE.

Below is my example:

https://github.com/lats1980/fw-nrfconnect-nrf/commit/3a93cfa594257722c6a28dca76a57408cccb88f7

The example works with Apple Home, but I did not test with chip-tool.

Ask them to refer to the changes in 

samples\matter\common\src\board.cpp

samples\matter\common\src\board.h

Especially, the API below opens a commissioning window with DNSSD:

chip::Server::GetInstance().GetCommissioningWindowManager().OpenBasicCommissioningWindow(chip::System::Clock::Seconds16(CHIP_DEVICE_CONFIG_DISCOVERY_TIMEOUT_SECS), chip::CommissioningWindowAdvertisement:kDnssdOnly).

Have a look, and see if this is something you can use as a starting point.

Best regards,

Edvin