Proxy connexion time

[Soter Giga]

Hi everyone,

I use the nrf5_SDK_for_Mesh_v4.1.0_src, I would like to reduce the time it takes for a device to connect to a bluetooth module as a proxy. For the moment this delay is minimum 5 seconds and sometimes the connection is so slow that it takes more than 20 seconds for me to connect.

I tried to modify the MIN_CONN_INTERVAL parameters.
and MAX_CONN_INTERVAL but it doesn't change much.
My goal would be to be able to connect to a proxy service in maximum 2 seconds! Is it possible?
What do I have to change in the code to do so?

Could someone please help me on this?

[Håkon Alseth]

Hi,

 

Hard to say what is keeping the connection to use up to 20 seconds here, but if you provide a sniffer trace, its easier to pin point where the latency is introduced.

Could you provide a sniffer trace where the connection uses > 10 seconds to be fully established?

 

Kind regards,

Håkon

[Soter Giga]

Hi,

can you please tell me how to do that? I'm using the Light switch example!

Otherwise, if it is not possible to reduce the connection time in less than 2 seconds, is it possible to send data to the mesh without having to connect or pair?

Thanks for your help

[Håkon Alseth]

Hi,

 

The ble sniffer documentation is available here:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_sniffer_ble%2FUG%2Fsniffer_ble%2Fintro.html

 

And the firmware files needed is available for download here:

https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRF-Sniffer-for-Bluetooth-LE/Download#infotabs

 

Soter Giga said:

Otherwise, if it is not possible to reduce the connection time in less than 2 seconds, is it possible to send data to the mesh without having to connect or pair?

 From a phone, you have to connect to a device that supports PB-GATT, as described here:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.meshsdk.v4.2.0%2Fmd_doc_user_guide_modules_provisioning_main.html&anchor=provisioning_main_pb-gatt

 

How many devices do you currently have in your mesh?

  

Kind regards,

Håkon

[Soter Giga]

Håkon Alseth said:

From a phone, you have to connect to a device that supports PB-GATT, as described here:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.meshsdk.v4.2.0%2Fmd_doc_user_guide_modules_provisioning_main.html&anchor=provisioning_main_pb-gatt

 

Hi Thanks for you answer I have 3 devices in my mesh. After checking your link, i sawa my PBGATT activated. But this doesnt allow me send data without pairing. I have to connect to the node to be able to send data! 

Is it possible to send data without pairing?

Thanks

[Edvin]

Soter Giga said:

Is it possible to send data without pairing?

It is not possible to send data from the phone to the node without connecting, no.

It shouldn't take 15-20 seconds to connect to the device if you use a sensible advertising interval and connection interval. Did you change any of these? Is it possible to capture a sniffer trace from the connection? You can use the nRF Sniffer to capture this.

Best regards,

Edvin