0 Replies Latest reply on Jun 1, 2018 3:52 AM by clem_alld

    Raspberry Pi 3 B+ Bluetooth 4.1 instead of Bluetooth 4.2 annouced

    clem_alld

      Hi,

       

      I would like to enable the data length extended (eL2CAP) functionality which is normally possible according to Bluetooth 4.2 Core Specifications.

       

      Unfortunately, I didn't found any informations about that. I check then the Bluetooth stack version of the CYW43455 chip and it returns:

       

      pi@raspberrypi:~$ sudo hciconfig -a hci0 version

      hci0:    Type: Primary  Bus: UART

          BD Address: B8:27:EB:27:0B:7F  ACL MTU: 1021:8  SCO MTU: 64:1

          HCI Version: 4.1 (0x7)  Revision: 0x8b

          LMP Version: 4.1 (0x7)  Subversion: 0x6119

          Manufacturer: Broadcom Corporation (15)

       

      The datasheet of the chip says Bluetooth 4.2, but it seems the Bluetooth stack inside is 4.1.

       

      CYW43455 Datasheet: http://www.cypress.com/file/358916/download

       

      Bluez driver: version 5.49

      Operating system: Raspbian Stretch Lite