Connection limit problem (Multi-ranging UWB using Murata 2BP EVK with iPhone)

AndrewHH — Wed, 22 Oct 2025 02:26:33 GMT

Hi there,

Board: Murata 2BP EVK

UWB module: Murata 2BP

MCU: QN9090

SDK: QN90DK6 2.6.16

Let me clarify the situation first.

1. Default Device Connection Number:

I'm now using the Nearby Interaction (TWR method) between EVK and iPhone.
There is a multi-ranging option controlling the max number of connections,
in the file app_preinclude.h, the macro is gAppMaxConnections_c.
show below:

The default value of it is 5.

2. Platform Limit:

This Murata 2BP EVK 's MCU is QN9090 THN.

At the file ble_config.h, it mentioned the maximum of the connection support by this platform is 16.

I can conclude that the MCU 's connection limit is 16.

3. K32W061 Connection Limit

This K32W061 is I don't know why it is exist in QN9090DK6 SDK.

Anyway, the file is qnble_config.h and it mentions the connection limit is 8.

So that the connection will limited <= 8.

4. Problem: Where to change the number of connection > 5?

When I set the gAppMaxConnections_c to 8, it can only connect to only 5 devices (iPhone).

I find where is limited the connection.

In the file UwbApi.c and function UwbApi_SessionInit.
Its information mentions that max connection is 5.

I want to know if there is a way I can change the max connection > 5?

Re: Connection limit problem (Multi-ranging UWB using Murata 2BP EVK with iPhone)

Ricardo_Zamora — Wed, 22 Oct 2025 18:23:59 GMT

Hello,

Hope you are doing well. Sorry for the inconvenience this might cause you but as the information of these products it's under NDA (Non-Disclosure Agreement) the information it's not public.

I apologize for the inconveniences, but as your question is about a Module/Kit from one of our Trimension UWB Partners, you would need to go directly with them to receive support for their Module/Kit.

All the support should come directly from the UWB Partner, in this case from Murata.

The documentation and software is distributed by the corresponding UWB Module partner. By selecting a module, you will be guided to our partner’s page where you can access datasheets, application notes, and the required enablement software.

I apologize again for the inconveniences.

Best Regards,

Ricardo

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Connection limit problem (Multi-ranging UWB using Murata 2BP EVK with iPhone)

Re: Connection limit problem (Multi-ranging UWB using Murata 2BP EVK with iPhone)