I am coming from the Nordic nrf51/52 world, and trying to understand the QN908sdk.
Why does the QN908x sdk UART example use simultaneous central/peripheral for the two-channels, putting one characteristic each on the phone and the QN908x?
This means there are two connections, and two GATT servers. By contrast, the nRF5sdk has a UART example which places both rx and tx characteristics on the btle-device, which operates as peripheral-only. One connection, one GATT server.
I can get the QN908x sdk example to work just fine, but I'm trying to understand why such a design might be desirable.