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Problem about the max count for the nRF52840-Dongle.

Hi Dear Team,

I am using the nRF52840-Dongle and pc-ble-driver-py-0.12.0 for the ble development, while I encounter a problem about the max connection per device.

I use the nRF52840-Dongle to connect to multi-end in parallel, but usually if I have 3 active connections, the next connection will always failed because of the COUNT ERROR:

From the SDK, error code 18 means:

it seems that the max connections for the nRF52840 is 3, all more than 3 will be rejected by the connection exceed error, I believe the ble connect would not to be only 3, but  I have no clue to extend the max count. Could you please tell me how to make the nRF able to connect to more than 3  end-devices simultaneously? Thank you very much.

BTW, I tried to modify the gatt_config but didn't work: