Some delay while receiving sensor data using mesh proxy

RE: Some delay while receiving sensor data using mesh proxy

Sash — Mon, 19 Aug 2019 02:16:24 GMT

The issue got fixed with new nRF Mesh App version.

RE: Some delay while receiving sensor data using mesh proxy

Sash — Fri, 26 Jul 2019 04:08:09 GMT

ok sure i will check and tell you

RE: Some delay while receiving sensor data using mesh proxy

Hung Bui — Thu, 25 Jul 2019 15:28:20 GMT

Please do test with the light switch, we need to isolate the problem and rule out any other factors can cause the delay.

RE: Some delay while receiving sensor data using mesh proxy

Sash — Thu, 25 Jul 2019 12:51:04 GMT

I have not checked with light switch example but i'm using modified ligh switch example for sending sensor data.

RE: Some delay while receiving sensor data using mesh proxy

Hung Bui — Thu, 25 Jul 2019 12:23:43 GMT

We won't be able to test your application if it requires some dependencies or external board.

Please answer my question, have you seen the issue with the light switch example ? If you can modify the light switch example to show the issue then it's much easier.

If you want to make this case private, you can click on the "Go Private" button.

RE: Some delay while receiving sensor data using mesh proxy

Sash — Thu, 25 Jul 2019 09:59:02 GMT

I have the code but it is confidential so cant share here, can you tell me how to send as private message?

I will share in private

RE: Some delay while receiving sensor data using mesh proxy

Hung Bui — Thu, 25 Jul 2019 07:41:47 GMT

Could you reproduce the issue on the light switch example ? If we can have some code to test here it would be easier to figure out why there is some delay.

RE: Some delay while receiving sensor data using mesh proxy

Sash — Wed, 24 Jul 2019 16:17:44 GMT

Hung Bui, what i mentioned is after provisioning with nRF mesh App. I have disabled proxy features in board_1 and board_2 because to check whether the sensor data receives fast and continuously but it also have same issue.Why the delay occurs with proxy?

RE: Some delay while receiving sensor data using mesh proxy

Hung Bui — Wed, 24 Jul 2019 07:50:55 GMT

Please clarify you mentioned " i have test with disabling proxy but i saw the same issue. " in earlier message.

Please try to test and reproduce using our example light switch example so we can test here.

RE: Some delay while receiving sensor data using mesh proxy

Sash — Tue, 23 Jul 2019 10:17:26 GMT

the problem is not with sensor because if i use same program without proxy example it works fine without delay. If i go with proxy example the delay occurs while receiving the data.

RE: Some delay while receiving sensor data using mesh proxy

Hung Bui — Tue, 23 Jul 2019 08:49:38 GMT

OK, so you have the same issue without the proxy role. Maybe you would need to check if the sensor actually taking longer time than normal.

You can print out some log, or use LEDs to mark each step of the communication to know where it actually causing delay.

RE: Some delay while receiving sensor data using mesh proxy

Sash — Tue, 23 Jul 2019 04:09:06 GMT

First step almost correct but it in board 2 set_cb() it will start the sensor after receiving 1 byte mesh.

PC-UART-> BOARD2 --MESH 6 bytes --> BOARD 1 --UART-> PC this step not start from PC-UART, while receive 1 byte mesh from board 1 to board 2, the board board 2 will start the sensor in set_cb() because i'm using sensor in board 2. So it starts the sensor and send 6 bytes of data to board 1 -->UART->PC.

proxy is enabled with mesh, i have test with disabling proxy but i saw the same issue. Light switch example never send 6 bytes data. In my point of view there is some interrupt to receive data in proxy example because of adv advertiser and ble advertiser

This is the flow:

PC-UART-> BOARD1 --MESH 1 byte --> BOARD 2 -->SET_CB()-->SENSOR_START

BOARD2--MESH 6 bytes-->BOARD1--UART->PC

From board1 to board2 the communication will be client to server

After receive 1 byte from board1 the board2 act as client and board1 act as server.

RE: Some delay while receiving sensor data using mesh proxy

Hung Bui — Mon, 22 Jul 2019 13:53:24 GMT

Hi Satheesh,

Thanks, please correct me if I'm wrong you have this kind of communication:

PC-UART-> BOARD1 --MESH 1 byte --> BOARD 2 --UART-> PC

And then after board 2 receives the image, it does this:

PC-UART-> BOARD2 --MESH 6 bytes --> BOARD 1 --UART-> PC

Correct ?

We need to check at which step the delay is introduced.

How often do you see the issue when you enable proxy ? Do you see the same issue when you test using out light switch (which has proxy)?

To verify if it's the mesh communication causing the delay, you can setup a timer from a client and periodically send some data to the server.
I don't see any obvious reason why you have a delay of 5-10 seconds. Do you test using our NRF52 DK ? Have you made sure the radio works fine ? You can test with a throughput test on BLE.

RE: Some delay while receiving sensor data using mesh proxy

Sash — Mon, 22 Jul 2019 08:42:06 GMT

i used control model for board 1 and board 2. with the help of set() i send 1 byte command from board 1 to board 2, from board 2 it sends the 6 bytes of sensor data to board 1 in between i used uart module to get and put the data's in putty.putty is used to display the sensor data.

RE: Some delay while receiving sensor data using mesh proxy

Hung Bui — Mon, 22 Jul 2019 08:35:59 GMT

Hi Satheesh,

I'm sorry but I still don't understand how data is sent between board. Please use Board 1 , Board 2 instead. If you can draw a figure it would be nice.

In your description, I don't know when Mesh is used. You only mentioned about UART. What exactly you mean by "and start the sensor (client-->server)" ?

RE: Some delay while receiving sensor data using mesh proxy

Sash — Sat, 20 Jul 2019 01:43:57 GMT

i have 2 devices both the device act as control model (client and server model) one board contains sensor,i send 1 byte command from first device to sensor board using uart, sensor board receives the command and start the sensor (client-->server), next the sensor board act as (client) and sends the sensor data to first device(server) with the help of uart , here i used putty to read data. facing delay while receiving data

RE: Some delay while receiving sensor data using mesh proxy

Hung Bui — Fri, 19 Jul 2019 14:48:39 GMT

OK, please explain the data flow. How do you send it via mesh ? Then from that how to get to Putty ? Please give as much information as possible.

RE: Some delay while receiving sensor data using mesh proxy

Sash — Fri, 19 Jul 2019 13:01:44 GMT

I was tested with and without phone connected in both situation i faced same issue. Data not getting in putty as flow continuously it stops for 5 to 10 seconds and starts getting data.. the delay is repeated

RE: Some delay while receiving sensor data using mesh proxy

Hung Bui — Fri, 19 Jul 2019 12:58:26 GMT

Could you describe how exactly did you test and found the delay (not getting data in flow with putty) ?

When you do your test do you have a phone connected to the device ? If you simply disconnect the phone would the issue go away ?

RE: Some delay while receiving sensor data using mesh proxy

Sash — Fri, 19 Jul 2019 08:36:11 GMT

5 to 10 seconds

RE: Some delay while receiving sensor data using mesh proxy

awneil — Fri, 19 Jul 2019 08:22:02 GMT

[quote userid="68969" url="~/f/nordic-q-a/50018/some-delay-while-receiving-sensor-data-using-mesh-proxy"]there is some delay[/quote]

There is always going to be some delay!

So how much delay, exactly, are you getting ?