Package lost on multicentral

[arditdv]

Description:

For my project I'm using 3 Nrf52840 DK, two of them as peripheral and the other as peripheral and central. I'm using also an iOS device as central. The two peripherals are connected with both centrals. The NRF52840 DK, which is configured as peripheral and central is connected also with iOS device.

The Problem is, that when i sent package and both central are connected, packages are lost. This problem doesn't occur if only one central is connected. It doesn't matter which one.
I dont really have an idea, why this happens so any help is appreciated.

Best regards

[arditdv]

I tried that, but the ios device decides on the connection parameter. I don't really have control over it. In this case (I'm using an iPhone 5SE) I think the ios device is not capable of 251 MTU size. Is there anything else I can try? Any other parameter I can try?

[Kenneth]

You are likely right that for the old phones that DLE is not supported, so in such case I can only think of trying to reduce the functionality somehow to reduce the throughput.

[arditdv]

I can not reduce the functionality but i changed iphone 5 against a iphone 7 and it worked like a charm.