Globalscale ESPRESSObin v5

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ESPRESSObin v5

The ESPRESSObin v5 is a small single board computer similar to a raspberry pi. It has 3 ethernet ports, a USB 3.0 port, as well as an internal mPCIe slot.

Files

OpenWrt Stable 18.06.2 Image

OpenWrt Snapshot Image

Yggdrasil 0.5.3 Package

Build The Image

First, you will need to grab the meta-imagebuilder repository. This repository has a script in it that builds pre-configured OpenWRT images.

git clone https://github.com/massmesh/meta-imagebuilder

Next, build the image using the `build` script.

cd meta-imagebuilder
./build massmesh meshnode espressobin

You now should see `.img.gz` files when you run

ls ./communities/massmesh/meshnode/bin/espressobin/

Flash The Image to µSD

You can locate your micro-sd card by running the following commands:

sudo su
fdisk -l

Take not of the output. It should contain something like /dev/mmcblk0. That's your memory card.

The build you ran in the last seciton created a compressed image file for you. The following command unzips the file, and pipes it into the µSD. Replace the things in bold as necessary before running the command.

zcat ./communities/massmesh/meshnode/bin/espressobin/openwrt-massmesh-meshnode-mvebu-cortexa53-globalscale_espressobin-squashfs-sdcard.img.gz | sudo dd of=/dev/mmcblk0

Modify U-Boot Variables

Before the ESPRESSObin will boot our Open WRT image from an SD card, we will need to modify just a few U-Boot variables. More information about this can be found in this commit message and these docs.

In order to connect to your modify ESPRESSObin's U-Boot variables, you'll need to establish a serial connection.

Once you've established a serial connection, change the bootcmd variable using the following command:

setenv bootcmd 'mmc dev 0; ext4load mmc 0:1 $kernel_addr $image_name;ext4load mmc 0:1 $fdt_addr $fdt_name;setenv bootargs $console root=/dev/mmcblk0p1 rw rootwait; booti $kernel_addr - $fdt_addr'

Now, save your changes.

saveenv

Flashing

  1. Write openwrt-18.06.2-mvebu-cortexa53-globalscale-espressobin-squashfs-sdcard.img.gz to a microsd card using the following command:
  2. zcat ~/Downloads/openwrt-18.06.2-mvebu-cortexa53-globalscale-espressobin-squashfs-sdcard.img.gz | sudo dd of=/dev/mmcblk0
  3. Run sync before removing the sd card
  4. Insert the sd card into the ESPRESSObin and power it on