3 Replies Latest reply on May 26, 2016 12:22 AM by nick.gart

    Programmatically Changing BLE device name

    nick.gart

      I want to have the last 4 characters of my device name be the last 4 hex characters of the MAC address.

         

      So in order to do this:

         

      -How do I retrieve the device MAC address? 

         

      -How do I programmatically set the device name ?

        • 1. Re: Programmatically Changing BLE device name
          bmah

          Use CyBle_GetDeviceAddress to get the device MAC address. Use CyBle_GapSetLocalName to set the device local name. Call this API before the advertisement start APIs so that the device advertises with the new address.

          • 2. Re: Programmatically Changing BLE device name
            nick.gart

            Thanks.

               

             

               

            I am testing on a few devices, and for every single device I am getting same address when calling CyBle_GetDeviceAddress  with the addr type set to 0 for public address.

               

             

               

            I have 'Silicon generated "Company assigned" part of the address' checked in the BLE component, and the public address remains as:

               

            00A050-XXXXXX

               

            on every call to CyBle_GetDeviceAddress  I am getting: 0x80 0x95 0x19 0x29 0x49 0x80

               

            Am I comparing two different addresses? Shouldn't the company prefix and 'die' assigned address be there?

            • 3. Re: Programmatically Changing BLE device name
              nick.gart

              Okay,

                 

              I got a little further following this advice: http://www.cypress.com/forum/proc-ble/update-device-name-id-during-advertising

                 

              I am now waiting until the BLESS state is event_close before getting the device address.

                 

                  while( CyBle_GetBleSsState() !=  CYBLE_BLESS_STATE_EVENT_CLOSE )
                      {
                          CyBle_ProcessEvents();
                      }

                 

              (CyBle_GetDeviceAddress(&device_mac_addr)

                 

              This gets me unique mac addresses.

                 

              The other issue I ran into was that CyBle_GapSetLocalName was truncating the custom name I was setting based on the length I put in the component:

                 

              charLen = (uint8)CYBLE_GATT_DB_ATTR_GET_ATTR_GEN_MAX_LEN(CYBLE_GAP_DEVICE_NAME_INDEX + 1u);

                 

              Once I padded out the name I put in the component settings, this stopped truncating. 

                 

              Is there a better way to do that?