Multi-link central about stability

Hi, 

I am using ncs v2.6.1 SDK.

I'm trying to use a nrf52833 central to connect 15 peripheral, the connection distance is about 6 to 7 meters, and the connection environment is in an office with 2.4g interference.

In short - term connections (e.g., within 30 minutes), the connection can remain stable. However, in long - term connections, disconnection always occurs. The reason for the disconnection is 0x8 (connection timeout).

Here is my connection parameters and scan parameters (reference document):

For the connection parameters of each slave device:

  • connection interval = 150 ms
  • connection timeout = 15000 ms 
  • connection latency = 0

scan parameters :

  • scan interval = 100 ms
  • scan window = 100 ms

I want to achieve that the central can maintain long - term connections with multiple devices without disconnection events occurring, and at the same time, there is no need to change the transmission power of the peripheral devices.

I would be very grateful if anyone could give relevant suggestions.

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