The prebuilt ConnectCore image includes support for the ConnectCore Cloud Services demo.

  1. Establish a serial connection with your device

  2. Download the firmware

  3. Program the firmware

1. Establish a serial connection with your device

Open a serial connection with the device. You can use any serial terminal program such as Tera Term, Minicom, CoolTerm, or HyperTerminal.

PuTTY terminal program is not recommended due to an incompatibility with the USB/serial driver.

Open a serial connection with the following settings:

Parameter Value

Port

Serial port where the device is connected

Baud rate

115200

Data bits

8

Parity

None

Stop bits

1

Flow control

None

2. Download the firmware

Download the firmware images from the following location: https://ftp1.digi.com/support/digiembeddedyocto/4.0/r7/images/ccimx6ulsbc/ccimx6ulsbc-installer.zip

3. Program the firmware

These instructions assume that the target U-Boot version is v2020.04 or higher, where the fastboot command is available.

Digi recommends you use the Universal Update Utility (UUU) through a USB connection to your development PC to program the images.

  1. Decompress the zip file in a directory of your choice.

  1. Download the latest Universal Update Utility (UUU), a software tool from NXP.

    UUU version should be v1.5.11 or higher.

  2. Place the uuu executable in a directory in your PATH, such as /usr/bin.

  3. Install udev rules to allow any user to run uuu to access the USB port:

    $ sudo sh -c "uuu -udev >> /etc/udev/rules.d/70-uuu.rules"
$ sudo udevadm control --reload

  1. Connect a micro USB cable to your development PC and the other end to the target USB OTG connector.

  2. Reset the device by pressing the reset button on the board and immediately press any key in the serial terminal to stop the auto-boot process. The U-Boot bootloader prompt displays:

    U-Boot dub-2020.04-r6.1 (Sep 19 2023 - 07:12:31 +0000)

CPU:   i.MX6UL rev1.2 528 MHz (running at 396 MHz)
CPU:   Industrial temperature grade (-40C to 105C) at 32C
Reset cause: POR
I2C:   ready
DRAM:  256 MiB
MCA:   HW_VER=1  FW_VER=1.19
PMIC:  PFUZE3000 DEV_ID=0x30 REV_ID=0x11
NAND:  256 MiB
MMC:   FSL_SDHC: 0
In:    serial
Out:   serial
Err:   serial
Model: Digi International ConnectCore 6UL SBC.
ConnectCore 6UL SOM variant 0x06: Industrial Ultralite 528MHz, 256MB NAND, 256MB DDR3, -40/+85C, Wireless, Bluetooth
  Board version 3, ID 135
Boot device:  NAND
Net:   FEC0 [PRIME]
Fastboot: Normal
Normal Boot
Hit any key to stop autoboot:  0
=>
    Information in the console log may vary.

  3. On the target, in U-Boot, execute the following command:

    => fastboot 0

  4. On your development PC, change to the directory where you extracted the ZIP file:

    $ cd <zip-folder>

  5. Program the image files:

    $ ./install_linux_fw_uuu.sh

  6. Once the firmware is installed, the device boots automatically. The default username is root with no password.

While the recommended boot method is NAND, you can also boot the image from a microSD card using the *.sdcard image file on the downloaded ZIP file. See Boot from microSD card for instructions on programming a microSD card and booting from it.

You must use a microSD with a minimum capacity of 8 GB.