Bluetooth Mesh Throughput measurement help

[mike]

Hello

We have been testing the nRF SDK for mesh and we have implemented a roundtrip delay counter by sending a few messages with a payload of 8bytes eg. "HiServer"

Its a modified version of the light_switch example (simple on off)

The client fetches the time from log_timestamp_get and sends a message to a specified server, the server responds with a "1"

When the client receives the response it does another log_timestamp_get and we get the time from there ((time2-time1)/32768)

We then repeat this action for a number of times to get an average

The rountrip time with 0 relay node in between the two is 0,55s

The rountrip time with 1 relay node in between the two is 1,87s

The rountrip time with 2 relay node in between the two is 3,57s

The rountrip time with 3 relay node in between the two is 5,36s

These times do not seem reasonable, what could we be doing wrong? No changes have been made to intervals(its 20ms)

I've attached the code(main client, main server, models for both and model include files for both)

Attached Files

We have also tried looping a message from client to server to measure throughput but the program freezes after sending around 2 or 3 messages. How would one go about sending lets say 15-100 messages in a row to measure throughput?
I do not want to use the health messages as suggested in this thread .

[Mttrinh]

Hi,

There have been many post on Devzone asking about this, so I think you can find answers to this by searching through Devzone.

I suggest you to have a look at this post. 

[mike]

Thank you Mttrinh

Yes there have been a lot of posts on this but none(that I can find) that actually addresses the problem, they say that the throughput should be this high(about 3,49kbps for 1 hop)and how to calculate it

but what is wrong with the code then?  why are my RTT so high? And why cant I send multiple messages in a row? 

[Ankit]

Hey Mike,

Were you able to sort out how to send multiple messages in a row in bluetooth mesh? I have been trying to do this in light_switch_example and got stuck at the moment. It would be really helpful if you guide me on how to achieve it by sharing some piece of code or by words.
Thanks