# Integration of Mender to Dual Gigabit Ethernet Carrier Board for RPi CM4 **URL:** \ **Category:** Yocto Project\ **Tags:** yocto, raspberrypi-cm4\ **Created:** [December 1, 2021, 6:42am UTC](https://hub.mender.io/t/integration-of-mender-to-dual-gigabit-ethernet-carrier-board-for-rpi-cm4/4362 "2021-12-01T06:42:58Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![lakshanthad](https://yyz2.discourse-cdn.com/flex036/user_avatar/hub.mender.io/lakshanthad/32/1403_2.png) [@lakshanthad](https://hub.mender.io/u/lakshanthad)\ **Post date:** [December 1, 2021, 6:42am UTC](https://hub.mender.io/t/integration-of-mender-to-dual-gigabit-ethernet-carrier-board-for-rpi-cm4/4362/1 "2021-12-01T06:42:58Z")
# Board description The Dual Gigabit Carrier Board powered by Raspberry Pi Compute Module 4 is equipped with dual Gigabit Ethernet ports and dual USB 3.0 ports, making it suitable for soft router applications, while keeping the hardware to a minimum. We have pre-installed a Raspberry Pi Compute Module 4 with 4GB RAM and 32GB eMMC to enable fast boot-up times and a smooth overall experience. You can also replace the installed CM4 with any other CM4 of your choice! It features a variety of I/O peripherals such as MIPI CSI, MIPI DSI, micro-HDMI to connect displays/ cameras, a standard 9-pin USB 3.0 header for more USB expansion, a micro-SD card slot, and an FPC connector while maintaining a compact form factor! This board is ideal for HTPC makers, Linux developers, software router enthusiasts, and the majority of regular Raspberry Pi users. ![](https://files.seeedstudio.com/wiki/102110497/board%20pics/dual-gbe-cm4-thumb-1.png) Where to buy: [Dual Gigabit Ethernet NICs CM4 Carrier Board for Raspberry Pi CM4 with 4GB RAM/ 32GB eMMC - Seeed Studio](https://www.seeedstudio.com/Dual-GbE-Carrier-Board-with-4GB-RAM-32GB-eMMC-RPi-CM-4-p-4898.html) Wiki: [reRouter carrier board | Seeed Studio Wiki](https://wiki.seeedstudio.com/Dual-Gigabit-Ethernet-Carrier-Board-for-Raspberry-Pi-CM4) # Test results The Yocto Project releases in the table below have been tested by the Mender community. Please update it if you have tested this integration on other [Yocto Project releases](https://wiki.yoctoproject.org/wiki/Releases?target=_blank): | Yocto Project | Build | Runtime | | --- | --- | --- | | dunfell (3.1 / 5.3.0) | :test_works: | :test_works: | | **Build** Means that the Yocto Project build using this Mender integration completes without errors and outputs images. | | | | **Runtime** Means that Mender has been verified to work on the board. For U-Boot-based boards, the [integration checklist](https://docs.mender.io/devices/integrating-with-u-boot/integration-checklist?target=_blank) has been verified | | | # Prerequisites - A supported Linux distribution and dependencies installed on your workstation/laptop as described in the [Yocto Mega Manual](https://www.yoctoproject.org/docs/current/mega-manual/mega-manual.html#detailed-supported-distros) - [Dual Gigabit Ethernet Carrier Board for RPi CM4](https://www.seeedstudio.com/Dual-GbE-Carrier-Board-with-4GB-RAM-32GB-eMMC-RPi-CM-4-p-4898.html) # Configuring the build ## Setup Yocto environment Create a directory for your `mender-dual-gbe-cm4` setup to live in and clone the meta information. ```auto mkdir mender-dual-gbe-cm4 && cd mender-dual-gbe-cm4 ``` Get all of the necessary layers: ```auto git clone -b master git://git.yoctoproject.org/poky layers/poky git clone -b dunfell https://github.com/Seeed-Studio/meta-seeed-cm4.git layers/meta-seeed-cm4 git clone -b master git://git.yoctoproject.org/meta-raspberrypi layers/meta-raspberrypi git clone -b dunfell https://github.com/openembedded/meta-openembedded.git layers/meta-openembedded git clone -b dunfell git://github.com/mendersoftware/meta-mender layers/meta-mender ``` In order to be compatible with meta-raspberrypi, change the gstreamer version of poky to the latest ```auto cd layers/poky cp -r meta/recipes-multimedia/gstreamer/ ../ git checkout dunfell rm -r meta/recipes-multimedia/gstreamer/ cp -r ../gstreamer/ meta/recipes-multimedia/ rm -r ../gstreamer/ ``` Modify the meta-raspberrypi to avoid compile error ```auto cd layers/meta-raspberrypi rm dynamic-layers/meta-python/recipes-connectivity/lirc/*.bbappend sed -i '/^LAYERSERIES_COMPAT_raspberrypi/s/= .*$/= "honister dunfell"/g' conf/layer.conf sed -i 's/arm\/armv8a\///g' conf/machine/raspberrypi4-64.conf ``` Modify the meta-mender to avoid compile error ```auto cd layers/meta-mender rm meta-mender-raspberrypi/recipes-kernel/linux/linux-raspberrypi-rt_%.bbappend sed -i 's/"0x4000"/"0x1f000"/g' meta-mender-raspberrypi/recipes-bsp/u-boot/u-boot-raspberrypi.inc sed -i 's/bootfiles/rpi-bootfiles/g' meta-mender-core/classes/mender-part-images.bbclass ``` ## Setup build environment Initialize the build environment: ```auto source layers/poky/oe-init-build-env ``` Add yocto project layers: ```auto bitbake-layers add-layer ../layers/meta-raspberrypi bitbake-layers add-layer ../layers/meta-seeed-cm4 bitbake-layers add-layer ../layers/meta-openembedded/meta-oe bitbake-layers add-layer ../layers/meta-openembedded/meta-python bitbake-layers add-layer ../layers/meta-mender/meta-mender-core bitbake-layers add-layer ../layers/meta-mender/meta-mender-raspberrypi bitbake-layers add-layer ../layers/meta-mender/meta-mender-demo ``` ## Configure Mender server URL (optional) This section is not required for a successful build but images that are generated by default are only suitable for usage with the Mender client in [Standalone deployments](https://docs.mender.io/architecture/standalone-deployments?target=_blank), due to lack of server configuration. You can edit the `conf/local.conf` file to provide your Mender server configuration, ensuring the generated images and Mender Artifacts are connecting to the Mender server that you are using. There should already be a commented section in the generated `conf/local.conf` file and you can simply uncomment the relevant configuration options and assign appropriate values to them. Build for Hosted Mender: ```auto # To get your tenant token: # - log in to https://hosted.mender.io # - click your email at the top right and then "My organization" # - press the "COPY TO CLIPBOARD" # - assign content of clipboard to MENDER_TENANT_TOKEN # MENDER_SERVER_URL = "https://hosted.mender.io" MENDER_TENANT_TOKEN = "" ``` Build for Mender Demo Server: ```auto # https://docs.mender.io/administration/demo-installation # MENDER_DEMO_HOST_IP_ADDRESS = "" ``` Build for Mender Production/ Self-Hosted (on-prem): ```auto # https://docs.mender.io/3.1/system-updates-yocto-project/build-for-production # # Uncomment below and update the URL to match your configured domain # name and provide the path to the generated server.crt file. # # Note that a custom server.crt file is only necessary if you are using # self-signed certificates. # # NOTE! It is recommend that you provide below information in your custom # Yocto layer and this is only for demo purposes. See linked documentation # for additional information. MENDER_SERVER_URL = "" FILESEXTRAPATHS_prepend_pn-mender-client := ":" SRC_URI_append_pn-mender-client = " file://server.crt" ``` # Building the image You can now proceed with building an image: ```auto MACHINE="dual-gbe-cm4-mender" bitbake core-image-base ``` Replace `core-image-base` with your desired image target. # Using the build output After a successful build, the images and build artifacts are: - `build/tmp/deploy/images/dual-gbe-cm4-mender/core-image-base-dual-gbe-cm4-mender.sdimg.bz2` if you already have Mender running on your device and want to deploy a rootfs update using this build, you should use the [Mender Artifact](https://docs.mender.io/architecture/mender-artifacts?target=_blank) files, which have `.mender` suffix. You can either deploy this Artifact in managed mode with the Mender server (upload it under Releases in the server UI) or by using the Mender client only in [Standalone deployments](https://docs.mender.io/architecture/standalone-deployments?target=_blank). # Flash instructions Please follow [this wiki guide](https://wiki.seeedstudio.com/Dual-Gigabit-Ethernet-Carrier-Board-for-Raspberry-Pi-CM4/#flash-to-emmc-cm4-emmc-version) to learn about flashing the above image to the eMMC on the board. Once flashed, when you turn on the reTerminal, it will boot from the compiled image. # Boot success If you see the following log from UART, that means the system has successfully booted ```auto [OK] Started Kernel Logging Service. [OK] Started System Logging Service. [OK] Started D-Bus System Message Bus. [OK] Started Getty on tty1. Starting Telephony service... [OK] Started Serial Getty on ttyS0. [OK] Reached target Login Prompts. [7.340436] audit: type=1334 audit(1638186061.687:4): prog-id=7 op=LOAD [7.347278] audit: type=1334 audit(1638186061.691:5): prog-id=8 op=LOAD Starting Login Service... [OK] Started Save/Restore Sound Card State. [7.386306] Bluetooth: Core ver 2.22 [7.390103] NET: Registered protocol family 31 [7.394856] Bluetooth: HCI device and connection manager initialized [[7.401967] Bluetooth: HCI socket layer initialized OK 7.407591] Bluetooth: L2CAP socket layer initialized 0m] Reac[7.413409] Bluetooth: SCO socket layer initialized hed target Sound Card. [OK] Started Telephony service. [OK] Started Avahi mDNS/DNS-SD Stack. [OK] Started Login Service. Poky (Yocto Project Reference Distro) 3.1.12 dual-gbe-cm4-mender ttyS0 dual-gbe-cm4-mender login: root root@dual-gbe-cm4-mender:~# ``` ## Resources - **[Web Page]** [Mender Official Documentation](https://docs.mender.io) - **[Web Page]** [Yocto Official Documentation](https://docs.yoctoproject.org) - **[Web Page]** [Raspberry Pi CM4 Official Documentation](https://www.raspberrypi.com/documentation/computers/compute-module.html) * * * _If this post was useful to you, please press like, or leave a thank you note to the contributor who put valuable time into this and made it available to you. It will be much appreciated!_