EdgeRouter Lite

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Notes on Ubiquiti's cool, new EdgeRouter Lite 3 (henceforth ERLITE-3), particularly as it pertains to (eventually) building with OE/Yocto. There's some basic info on these pages, then more on subpages linked to at the end.

Note that this info is not that related to using the ERLITE-3 as a router so much as it's covering how to use it as a basic MIPS development kit, so it doesn't get into all of the router configuration.

Disclaimer: I have no financial interest in the ERLITE-3, other than wanting to use it as (potentially) the next Yocto Project MIPS reference platform (theoretically replacing the current Yocto MIPS reference board, Ubiquiti's Routerstation Pro). Questions/comments/feedback to rpjday@crashcourse.ca, as this page and subpages are definitely a work-in-progress.


A gaggle of links related to Ubiquiti Networks in general and the ERLITE-3 in particular.

First, some general Ubiquiti links:

Some EdgeMAX/ERLITE-3 related Ubiquiti pages:

Finally, some external, ERLITE-3 related pages, mostly reviews (in no particular order):

As time goes by, I'll add more links to particular topics in Ubiquiti's ERLITE-3 forum.

Cisco console cable

If you want to hack the ERLITE-3 and boot to the command line, you'll need something equivalent to a Cisco console cable (which you'd add to a USB-serial cable for the full connection):

At that point, just add something like minicom and settings:

  • /dev/ttyUSB0
  • 115200 8N1
  • no flow control

and go.

The ERLITE-3 factory USB drive

The advertised 2G of storage in the ERLITE-3 is actually a really convenient (removable) USB stick inside the unit that you can see way over on the left in this photo that you can pop out, reflash, and reinsert if you want to hack. The layout of the stick at the moment, as seen as drive /dev/sdc by my Ubuntu host:

$ sudo fdisk -l /dev/sdc

Disk /dev/sdc: 3880 MB, 3880452096 bytes
120 heads, 62 sectors/track, 1018 cylinders, total 7579008 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x210d0d00

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1            2048      292863      145408    c  W95 FAT32 (LBA)
/dev/sdc2          292864     3710975     1709056   83  Linux

The contents of the FAT partition (there's the kernel):

-rw-r--r-- 1 rpjday rpjday 8081560 Oct 24 08:08 vmlinux.64
-rw-r--r-- 1 rpjday rpjday      33 Nov  7 19:55 vmlinux.64.md5

The contents of the Linux (ext3) partition (and there's the root filesystem):

drwx------ 2 root     root    16384 Dec 31  1969 lost+found
-rw-r--r-- 1 root     root 70803456 Nov  7 15:55 squashfs.img
-rw-r--r-- 1 root     root       33 Nov  7 15:55 squashfs.img.md5
-rw-r--r-- 1 root     root       41 Nov  7 15:51 version
drwxr-xr-x 7 root     root     4096 Jun  1  2011 w
drwxr-xr-x 2 www-data root     4096 Jun  1  2011 www

As you can see, there's the kernel and the root filesystem but no U-Boot binary -- that's stored separately in NOR flash (covered later), so when you get around to wanting to update U-Boot, you'll need to update what's in NOR flash.

More ERLITE-3 wiki pages

Given the length of subsequent sections, I'm going to break them off as separate wiki pages:

and there will be more on a regular basis.

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