Related to Thread

RE: Related to Thread

Simonr — Wed, 13 Feb 2019 14:11:04 GMT

Hi Alan

1. Do you mean why the pairing is done by button press? The pairing mechanism has been implemented for the purpose of making the examples user friendly. This is not a part of the Thread or CoAP specification.

2. I'm sorry but I am finding some of your questions hard to understand. I think the server has pairing enabled for 5 seconds. (See thread_coap_utils_provisioning_enable function in thread_coap_utils.c)

3. The best way to make sure only your devices connect to your network would be to hardcode some of the Dataset parameters, i.e. Extended PAN ID and/or MasterKey, that are found in dataset.h. You will have to add them to your sdk_config.h file and give them specific values, as they are, by default, random. It could be easier to use the nRF Thread topology monitor to keep track of your Thread network

4. Thread documentation is unfortunately rather scarce, and you will have to make due with what our Documentation Library has to offer on security documentation for Thread.

5. The pairing is added to make the examples easy to pair, and are in all our Thread examples, they are by no means required.

6. Yes, this should be possible, but we don't have an example project for you. I suggest you look into for example the MQTT which should be able to send a payload in a Thread network.

Best regards,

Simon

RE: Related to Thread

Alan Ajit — Tue, 12 Feb 2019 08:09:38 GMT

Thanks for your replay,

you said commissioner in a thread network is leader and this leader start commisioning other device join to network. but in case of pairing server and client press button and pairing happens how its same as commissioning?

1. Is this pairing is implemented for application purpose( ie you made any type application protocol for client server communication)?

2. when leader starts commisioning when its stop?

3. How to know the device joining in the network is right one or not?

4.Is it any document regarding security at the time commisioning(ie. how to add security at the time joining one device to network)?

5.In this example client pair to one server and control server. if we use unicast address for communication why we use this pairing?

6. I want to send my payload in the thread network can you guide me how to achive this?

RE: Related to Thread

Simonr — Tue, 12 Feb 2019 06:53:55 GMT

Hi Alan

1. - Yes, what the testing instructions says is correct.

- There is not much security by default in these examples, so you would have to make your own. I would not count the PAN ID as a security measure as it is only a 2 byte ID.

2. - I think commisioning and pairing in this case is the same thing. The commisioner in a Thread network is called Leader, and is the node sitting on all security information i.e. encrytpion keys and what nodes are allowed in the network.

- The pairing process is whenever any server connects to any server in the Thread network. In this example you press a button on one server and one client node, to make them pair with each other. You can confirm pairing by seeing whether or not you can control BSP_LED_3 on the server node with a press of the clients BSP_BUTTON_0. A client node can only be paired with one server at a time, but you can change the server by repeating the pairing process with another server. (I will look more into security options, and get back to you when I have more information on the matter)

3. - This link explains everything you need to know regarding border router for thread.

Best regards,

Simon

RE: Related to Thread

Alan Ajit — Mon, 11 Feb 2019 09:29:33 GMT

Dear nordic,

sorry for late replay. iam studying about hread network thats the reason for late replay . I have some doubts regarding the thread example provide from nordic.Example provide by nordic is

- Coap client

-coap server

-MTD coap client

I have some doubts regarding the testing instruction:-

1. according to 4th instruction another nodes programmed with client or server example and they will join as router or end device. ie,commisioning happen here for joining device to network.

- Is it right?

- security regarding this commision(ie what are the parmeters exchange between parent and child)?

-PAN ID

-other security parameters

- can you describe what happens in this commissioning how we know the joined device is right one or not?

- how much time for commisioning(ie how much time network will open for device joining)?

2. PAIRING:- it's little bit confusing

- Is that for only establish communication between Particular server and client is that right?

3. There is nothing regarding border router

- how we connect to external network?

RE: Related to Thread

Simonr — Mon, 04 Feb 2019 09:45:17 GMT

I am not quite sure about what you mean with

[quote user=""]i need to evaluate thread in nrf52840.[/quote]

If you are new to Thread you should read our Getting started with Thread guide. If this is not what you are looking for please try to specify what you want to do.

Best regards,

Simon