We're working with NINA-B112 with 4.0.0 of the u-blox firmware, and we're looking at the getting started guide UBX-16009942. There are examples there on how to configure GATT Client/Server by configuring BLE Central/Peripheral so the document seems to assume that:
- BLE Central = GATT Client
- BLE Peripheral = GATT Server
However we're designing a smartwatch-like device that needs the smartphone to be a GATT Server (sending notifications, etc.) and the NINA-B112 to be a GATT Client, but the smartphone still initiates the connections (BLE Central). Looking through the AT Commands Manual (UBX-14044127) we haven't found a way to do this with the NINA-B112.
So hopefully this combination (Central/Server, Peripheral/Client) is doable with the NINA-B112? If so, how?