This is a list of known issues and limitations for Digi Embedded Yocto 2.4-r3:

Common

  • TrustFence™

    • If TrustFence image encryption support is enabled, the uSD image will only boot a signed U-Boot

  • Firmware update

    • The software update package must be located in the root level of the update media (subfolders are not yet supported).

  • Cloud Connector

    • Remote file system management fails with long file names and paths (over 255 characters).

ConnectCore 6UL

  • ConnectCore 6UL System-on-Module (SOM)

    • The UART connected to the Bluetooth chip on early versions of the ConnectCore 6UL system-on-module (hardware version < 4) cannot properly execute flow control. To work around this issue, UART1 of these SOM versions has been configured to operate at 115200 bps and without hardware flow control, reducing the maximum throughput of this interface.

    • Wi-Fi

      • The QCA6564 wireless chip does not support Wake On Wireless LAN.

      • When working as an access point, DFS capable channels in band A are not currently supported.

      • For P2P connections Digi recommends "Negotiated GO" modes. The QCA6564 devices (ConnectCore 6UL) running a v4.14 kernel version fail to join to autonomous groups.

ConnectCore 6

  • i.MX6 system-on-chip

    • NXP i.MX6 processor has a documented errata (ERR004512) whereby the maximum performance of the Gigabit FEC is limited to 400Mbps (total for Tx and Rx).

  • ConnectCore 6 System-on-Module (SOM)

    • Wireless

      • When using softAP mode on Band A on the Qualcomm AR6233, channels used for Dynamic Frequency Selection (DFS) are not supported.

      • The Qualcomm AR6233 firmware does not support the following configuration modes:

        • Concurrent modes involving P2P mode, such as P2P + softAP or P2P + STA.

        • Bluetooth + softAP + STA concurrent mode.

      • A maximum of five clients are supported when using Qualcomm’s AR6233 in softAP mode.

      • A maximum of ten connected devices are supported when using Qualcomm’s AR6233 Bluetooth Low Energy mode.

  • ConnectCore 6 SBC

    • The Micrel PHY KSZ9031 may take between five and six seconds to auto-negotiate with Gigabit switches.

ConnectCore 6 Plus

  • i.MX6 system-on-chip

    • NXP i.MX6 processor has a documented errata (ERR004512) whereby the maximum performance of the Gigabit FEC is limited to 400Mbps (total for Tx and Rx).

  • ConnectCore 6 Plus SBC

    • The Micrel PHY KSZ9031 may take between five and six seconds to auto-negotiate with Gigabit switches.

ConnectCore 8X

  • i.MX8QXP system-on-chip

    • The following features are not supported in this BSP release: Power Management, PWM, ADC, RS485. They are implemented in Digi Embedded Yocto 2.6.

    • GPU maximum performance reduced. The maximum frequency targets are 850 MHz for the shaders and 700 MHz for the core. However, in this hardware release the maximum frequency is limited to 650 MHz for the shaders and 600 MHz for the core, with the corresponding performance reduction. These targets will be met in future releases of the hardware.

    • BSDL operation is not supported. It will be available in future releases of the hardware.

    • LPUART interfaces don’t support 7-bit transfers with no parity. 7-bit transfers have to be done using odd or even parity.

  • ConnectCore 8X SBC Pro

    • USB 3.0 not supported.

  • Digi Embedded Yocto

    • The following features are not supported in this release for the ConnectCore 8X plaform:

      • Trustfence ™

      • Digi Remote Manager