This is a list of known issues and limitations for Digi Embedded Yocto 4.0-r7:

  • Firmware update

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

    • To update from dey-3.2 version or lower to dey-4.0-r7 on a single boot layout, you must flash the recovery partition with the latest Yocto release before performing the firmware update.

  • ConnectCore Cloud Services

    • Remote file system management only supports names and paths up to 255 characters.

  • Recipes with large downloads may fail during fetch operation due to timeout.

    Bitbaking an image recipe implies downloading and building the source code of all the recipes that form part of the root file system, which takes several hours the first time. Some source code repositories, such as the Linux kernel, represent a large download that might time out and make your build process fail. If this happens, run the following command to just fetch the source code of the offending recipe separately (to dedicate all CPU resources to it):

    $ bitbake -k --runall=fetch <image-recipe>

    When this task finishes successfully (you may need several retries), you can proceed to build your image recipe. Do the same with any recipe that fails with a timeout during the fetch operation.

ConnectCore MP15 SOM

  • Wireless

    • Performance of the wireless interface is reduced when using concurrent mode, as the wireless interface is shared between several different functionalities.

    • When using wireless concurrent mode, Digi recommends you keep the different modes on the same frequency channels. For example, when configuring access point mode on channel 36 in the 5GHz band, connect to the same channel both in station mode and Wi-Fi direct so that the radio performance is optimized.

    • When working as an access point, DFS-capable channels in the 5GHz band are not supported.

    • Fast roaming (802.11r) network connections fail due to an issue in the Murata LBEE5PK2AE-564 firmware. It is expected that the Wi-Fi chip vendor fixes the issue for the next DEY release.

  • Hardware version 1 of the ConnectCore MP15 has a spurious capacitance on the 32 kHz oscillator lines that causes the internal RTC to drift by approximately 6.8 seconds per day (if not connected to the Internet). Refer to Real-Time Clock (RTC) for more information.