Some delay while receiving sensor data using mesh proxy

[Sash]

Hi, I'm using proxy_client and proxy_server from light_switch examples of mesh sdkv2.1.1. The provision process gets successful with android mobile using nRF Mesh App but i face some issue while receiving sensor data, there is some delay(not getting data in flow) with putty.If i use without proxy (provisioner with DK board), i never face that issue.Can you please help me.

[awneil]

Sash said:

there is some delay

There is always going to be some delay!

So how much delay, exactly, are you getting ?

[Sash]

5 to 10 seconds

[Hung Bui]

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 ? 

[Sash]

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 

[Hung Bui]

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. 

[Sash]

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

[Hung Bui]

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)" ? 

[Sash]

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.

[Hung Bui]

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.