RE: How do I know the MAC address of the sending device when it receives a nus message?

alex kim — Tue, 28 Jan 2020 08:50:19 GMT

Hi, Vidar

Thank you for your answer.
I used the conn_handle to get the MAC address.

Alex

RE: How do I know the MAC address of the sending device when it receives a nus message?

Vidar Berg — Mon, 20 Jan 2020 13:27:16 GMT

Hi Alex,

Write and notification events do not include the address of the peer device, but a connection handle that references an active link with a specific device. The handle is assigned when a new connection is established and freed on disconnect. So, in other words, the application has to keep track of the connections handles to determine which device the data came from.

You can associate the connection handle with a MAC address if you want. The peer address is received in the BLE_GAP_CONNECTED event along with the connection handle (ble_gap_evt_connected_t)). "BLE Link Context Manager" is an SDK module that may be useful for managing the connection handles.

-Vidar