Can a GATT CLIENT talk to another GATT CLIENT?

[haricane]

I want to transfer a few bytes of data between two NRF52 modules. 

I have checked out the BLE Blinky and NUS example and understand the gatt client and server ideas. 

My question is, if the service UUIDS are already know by both modules (no discovery is needed), can both modules simply work as GATT clients and exchange data using just the gatt write method available to clients? 

sd_ble_gattc_write (uint16_t conn_handle, ble_gattc_write_params_t const *p_write_params)

Regards, 

Hari 

[awneil]

No: it's Client-Server - not Peer-to-Peer.

However, an nRF52 could have both Central and Peripheral roles - so could have both a Server & Client.

infocenter.nordicsemi.com/.../examples_ble_cen_per.html