First study Mesh

RE: First study Mesh

tesc — Tue, 24 Aug 2021 11:32:01 GMT

Hi,

1. In the figure, the GATT proxy nodes are marked "P", and in addition to GATT proxy they also have relay feature enabled. The node marked "GATT" is a GATT only smartphone (or similar device) that connects to the mesh network through a GATT proxy node. The GATT proxy node will relay packets to and from the GATT only node.

2. Bluetooth mesh does not use the "long range" feature from Bluetooth 5, so the way you get longer range in Bluetooth mesh is from relaying packets through the network. This relaying happens automatically by relay nodes (nodes with relay feature enabled). In the figure, all the nodes marked "P", "RN" and "FN" have the relay feature enabled, in addition to any other features. This means none of the examples have "long range" from Bluetooth 5. All of the examples work with Bluetooth mesh networks where packets gets relayed.

In nRF5 SDK for Mesh, all examples that can be tested using the nRF Mesh app for provisioning and configuration, have enabled the GATT proxy feature. For instance the Light switch example.

3. The API lets you send and receive mesh packets on a device that has only normal BLE support and not Bluetooth mesh support. It must be built on top of the normal Bluetooth API on the specific system, for instance on top of the Bluetooth API of Android. We do have libraries for this on github, for Android and for iOS.

4. The Dongle is only partially supported. See Limited compatibility with nRF52840 on PCA10059 Dongle for details.

Regards,
Terje

RE: First study Mesh

tony55723 — Sat, 21 Aug 2021 03:04:36 GMT

Thank you for your reply during this time

I probably understand Bluetooth Mesh

Let me ask you a few more questions, Thanks

1、Should GATT nodes be the same as N nodes? (it will not retransmit messages)

2、The example of GATT in the Mesh SDK folder? (Especially LongRange example)

3、

If the mobile phone wants to use mesh, it seems to be embedded with an API.

No matter Android or IOS, where is this API?

4、I want to add Thingy and Dongle to mesh. Can you briefly explain where I should modify?

RE: First study Mesh

Hung Bui — Thu, 19 Aug 2021 06:37:17 GMT

As I have answered you earlier a node can have multiple features (roles) at the same time:
Our examples can do most of the role for example the light switch example can be FN, RN, P, N. We have the example for LPN separately.

RE: First study Mesh

tony55723 — Thu, 19 Aug 2021 03:56:25 GMT

Can a node have multiple functions?

I always thought was that a node can only have one mode

This Server contains proxy node and friedn node?

Thank you

RE: First study Mesh

Hung Bui — Mon, 16 Aug 2021 08:07:24 GMT

Hi Tony,

1. Two same model can't be on one the same element. This is the reason we have multiple elements because we have multiple OnOff clients. Please study the Mesh specification here or the quick start guide here.

2. The server node a normal mesh node and it's also a Proxy node at the same time. It can also act as a friend node.

RE: First study Mesh

tony55723 — Sat, 14 Aug 2021 07:46:10 GMT

I currently use command line to erase the chip, and then use SES to download the program

I have now downloaded the sample program light_ switch

The function should be successful

devzone.nordicsemi.com/.../IMG_5F00_0256.MOV

But I have a few questions

1、In nRF Mesh APP for iOS, why does the client have 3 elements?

(How should I understand element?)

(Server has only one element, And I only set client Element2)

=================================================

2、In my video, example is light_ switch,

The board of the client should be a proxy node,

What kind of node does the server board belong to?

Thank you

RE: First study Mesh

Hung Bui — Thu, 12 Aug 2021 08:17:26 GMT

Hi Tony,
I would suggest to try installing Jlink driver again. Aslo please upgrade (or reinstall ) nRF Connect app. The latest version of nRF Connect is v3.7.0 and the programmer is v1.4.11

Or you can just use the nrfjprog.exe to program , it's my preferred programmer if you are familiar with commandline tool.
Note that you can use Segger Embeded Studio to program the chip after you compile the application.

RE: First study Mesh

tony55723 — Thu, 12 Aug 2021 01:43:34 GMT

Should this be a successful implementation?

But I still display the error below in NRF connect（v3.6.1）

Thank you

RE: First study Mesh

Hung Bui — Tue, 10 Aug 2021 11:53:37 GMT

Hi Tony,
Do you see the nRF52840 DK appear in "My Computer" when you plug it in ?
Could you install Nordic Command Line Tools ? and try using nrfjprog.exe to program ?
In Segger Embedded Studio you can flash using Target -> Download XYZ

RE: First study Mesh

tony55723 — Tue, 10 Aug 2021 09:11:58 GMT

I want to burn Nordic example hex to 52840dk

But there is a new problem

My system is Windows 7

J-Link is 【JLink_Windows_V752b_x86_64】

52840 DK【PCA10056 V0.9.2 2017.34】

I don't know how to solve this problem...

======================================

Another question I'd like to ask

In keil, here is a button to download the program

In segger embedded studio, Where is the download button?

Thank you

RE: First study Mesh

Hung Bui — Mon, 09 Aug 2021 12:14:21 GMT

Hi Tony,
You would need at least 2 DKs. The Thingy is also not supported.

RE: First study Mesh

tony55723 — Mon, 09 Aug 2021 08:13:21 GMT

All example is specially designed for DK, right?

Because dongle has no buttons,

it is impossible to 100% test the effect without changing the example code

I only have 52840 DK here

No problem testing Mesh client

But Mesh server....

Is there any code for Thingy in the exapmle folder?

Or .... two DK board are required?

Thank you

RE: First study Mesh

Hung Bui — Mon, 09 Aug 2021 07:59:15 GMT

Please use the nRF52 DK for development, not the dongle. The dongle is developed as a backend for nRF Connect or nRF Sniffer, not a development tool. Only after you are very familiar with the SDK and our Toolchain then you can use the dongle but it would requires some modification.

RE: First study Mesh

tony55723 — Sat, 07 Aug 2021 07:39:08 GMT

I found softdevice in sdk17

But now there are new problems

Did I download mesh successfully?

Can DFU problems be ignored?

Because I found articles with the same problems as me in devzone

Thank you

RE: First study Mesh

tony55723 — Sat, 07 Aug 2021 06:58:23 GMT

I tried to download example to dongle

But I have some problems

Does mesh also have its own softdevice?

I need to find the softdevice hex and add it?

In addition, what does DFU's error mean?

My dongle is connected to the computer through USB

Maybe the USB port is loose, which will cause this problem?

Thank you

RE: First study Mesh

Hung Bui — Wed, 04 Aug 2021 07:31:17 GMT

Hi,
Please study the mesh protocol specification. Have a look at section 2.3.11

The type: Proxy, Friend, Relay are features. A node can have multiple features at the same time.

[quote user="tony55723"]

I have two 52840 dongle

《PCA10059，V1.2.0，2019.28》

This can support running Mesh

But I have two other devices

Thingy《PCA20020，V1.0.0，2017.40》

52840 DK《PCA10056，V0.9.2，2017.34》

Do these two also support Mesh?

[/quote]

Yes, they can all be programmed to be a mesh node.

RE: First study Mesh

tony55723 — Tue, 03 Aug 2021 17:10:45 GMT

Thank you for your reply,

On the second point, I still don't quite understand

Maybe another way to ask

Device itself is a node

The device is one of the six nodes that need to be set, right?

Or my idea is simply wrong, because you mentioned level

If use level to understand.......

In a mesh network, it is possible that the current device, whose node is p, may become RN at the next moment

========================

Another question

I have two 52840 dongle

《PCA10059，V1.2.0，2019.28》

This can support running Mesh

But I have two other devices

Thingy《PCA20020，V1.0.0，2017.40》

52840 DK《PCA10056，V0.9.2，2017.34》

Do these two also support Mesh?

It's a long time.......

Thank you

RE: First study Mesh

Hung Bui — Tue, 03 Aug 2021 12:33:40 GMT

Hi Tony,

1. Correct. Only Proxy node allow a phone to join the mesh network. However you can implement BLE in any node. That would allow a phone to connect to the node but not allowing it to join the mesh network. Have a look at co-exist example.

2. No it's not correct. It doesn't really matter if you have a client or server model it's on the access level when the P, RN, FN, LPN are on the lower levels.

3. Our examples can do most of the role for example the light switch example can be FN, RN, P, N. We have the example for LPN separately.