First of all here is the result:

Connection Diagram

Expand Omega Storage with SD card

To install Octoprint on Omega2 you will have to first expand the storage on Omega2+
plug a micro SD card into the Omega2+.

it will show up as /dev/mmcblk0

1. format the SD card to EXT4 (you can skip this if you already have you sd card in EXT4 format)
   install disk utilities:

opkg update
opkg install fdisk e2fsprogs block-mount

• partition the SD card to Linux partition using fdisk
• format SD card

umount /dev/mmcblk0p1
mkfs.ext4 /dev/mmcblk0p1

1. mount SD card
   mount the SD card

umount /dev/mmcblk0p1
mkdir /mnt/SD
mount /dev/mmcblk0p1 /mnt/SD

1. Copy current /overlay directory

tar -C /overlay -cvf - . | tar -C /mnt/SD/ -xf - 
umount /mnt/SD

1. Setting up the /overlay Directory to Automount on Startup

block detect > /etc/config/fstab

• edit /etc/config/fstab
  change option target '/mnt/mmcblk0p1' to option target '/overlay'
  and option enabled '0' to option enabled '1'

reboot

after reboot you can verify if you /overlay is mounted properly by running df
you should see something like this:

/dev/mmcblk0p1         7374776     33328   6947108   0% /overlay

Build Octoprint

1. install required packages
   edit /etc/opkg/distfeeds.conf
   uncomment

src/gz reboot_packages http://downloads.lede-project.org/snapshots/packages/mipsel_24kc/packages

opkg update
opkg install python python-pip unzip
pip install --upgrade setuptools

1. expand /tmp folder on the Omega

mkdir /overlay/tmp
rm -rf /overlay/tmp/*
cp -a /tmp/* /overlay/tmp/
umount /tmp
[ $? -ne 0 ] && {
umount -l /tmp
}
mount /overlay/tmp/ /tmp

1. download and build

cd /root
wget https://github.com/foosel/OctoPrint/archive/1.0.0.zip
unzip 1.0.0.zip
cd OctoPrint-1.0.0
pip install -r requirements.txt

Note: Currently I am only able to get Octoprint 1.0.0 to work

1. Now we need to edit a few files to resolve some compatibility issues.
   TODO: edit the following file

• Unicode is going to cause problem with Python on Omega2. we have to replace the unicode author name to ascii ( Sorry Gina Häußge )

s/Häußge/H\./g
sed -i 's/Häußge/H\./g' /root/OctoPrint-1.0.0/src/octoprint/util/comm.py
sed -i 's/Häußge/H\./g' /root/OctoPrint-1.0.0/src/octoprint/util/virtual.py

• Omega only have one user and that is root. Octoprint does not let you run as root so we have to suppress that

sed -i 's/exit("You should not run OctoPrint as root!")/pass/g' /root/OctoPrint-1.0.0/src/octoprint/server/__init__.py

1. test drive

./run

open up a browser and

Auto start Octoprint at startup

• move OctoPrint to a proper location

mv /root/OctoPrint-1.0.0 /usr/share/OctoPrint

• make symlink to command

ln -s /usr/share/OctoPrint/run /usr/bin/octoprint

edit /etc/rc.local
add the following before exit 0

octoprint &

1. expand /tmp folder on the Omega

mkider /overlay/tmp
rm -rf /overlay/tmp/*
cp -a /tmp/* /overlay/tmp/
umount /tmp
[ $? -ne 0 ] && {
umount -l /tmp
}

i think you meant

mkdir /overlay/tmp

could it be?

After finally getting everything done I am running octoprint but does not come up with an appropriate ip address!

root@Omega-6255:~/OctoPrint-1.0.0# ./run
2017-02-16 06:56:10,251 - octoprint.server - INFO - Listening on http://0.0.0.0:5000

When I kill octoprint I get.

^C2017-02-16 06:57:04,868 - octoprint.server - CRITICAL - Now that is embarrassing... Something really really went wrong here. Please report this including the stacktrace below in OctoPrint's bugtracker. Thanks!
2017-02-16 06:57:04,871 - octoprint.server - ERROR - Stacktrace follows:
Traceback (most recent call last):
File "/root/OctoPrint-1.0.0/src/octoprint/server/init.py", line 190, in run
IOLoop.instance().start()
File "/usr/lib/python2.7/site-packages/tornado/ioloop.py", line 627, in start
event_pairs = self._impl.poll(poll_timeout)
KeyboardInterrupt

I conclude that I am missing something or it really is a bug either in my build or in the octoprint ( which I doubt due to others having theirs up and running.) Not sure where to go here. I've attempted to use my googlefu and rebooted 2 times. I have access to the Onion from local ip of 192...72 and though USB. I am also connected to the internet so I am totally confused here. Any help would be much appreciated

@Phil-Heuy said in Octoprint (3D print server) on Omega2+:

After finally getting everything done I am running octoprint but does not come up with an appropriate ip address!
...
2017-02-16 06:56:10,251 - octoprint.server - INFO - Listening on http://0.0.0.0:5000

0.0.0.0 means it is listening on all IPs available on the Onion - just try to use your LAN-IP and port 5000, should work

thanks

This makes the PrintrBot in the office so easy to use that it's almost always on and printing stuff. We had to move it to a different room to be less distracting!

I read-though a couple times before attempting. I'm surprised there are so few comments. After a literal copy paste operation, I now have a webui for my 3d printer (Anet A8). Thanks guys, the Omega2+ is really shining here. I haven't made a single change to this any of he setup information above. After I connected my printer and powered up, I did need to adjust the serial port to "/dev/ttyUSB0" and set the Baud rate to 115200. It worked the first time. My little girl will have some new toys when she wakes up in the morning.

Onion
Red => 5V
Grey => GND
blue =>USB-
Green=>USB+

Mega USB A
Red => 5V
Grey => GND
blue=> pin 2 (USB -)
Green=> pin 3 (USB +)

I power everything up through the Green Terminal Block on the Ramps Shield.

I am not able to connect to the Ramps board with this setup. The issue I have come across is that I cant seem to find any documentation on using the USB pins. Anyone have a resource I could read up on to get this working in this fashion?

https://drive.google.com/open?id=18u8v2-7UK3iKGmlZZ8UeBE3zajbIXJrsrA

Edit:

After attempting to connect through the normal USB A to the ramps it seems that the Omega is seeing the serial port

• [ 169.668429] usb 2-1: new full-speed USB device number 3 using ohci-platform
  [ 169.903385] cdc_acm 2-1:1.0: ttyACM0: USB ACM device

but Octoprint is not when connected through the pins.

So I am currently attempting to solve this issue in hopes that will also alleviate the above issue.

The error I am getting in the Octoprint Terminal is:

• Changing monitoring state from 'Offline' to 'Opening serial port'
  Connecting to: None
  Unexpected error while connecting to serial port: None SerialException: '[Errno 2] could not open port None: [Errno 2] No such file or directory: 'None'' @ comm.py:_openSerial:795
  Changing monitoring state from 'Opening serial port' to 'Error: Failed to open seria...'

You will need more RAM for this to work. You can do this by creating a swap file. I put my swap file in the root (/) folder which resides on the SD card when following the instructions here. I also made my swap file 512 megabytes, 256 was not enough.

Follow the instructions above and stop at step 3.

Un-comment this line in the /etc/opkg/distfeeds.conf
src/gz reboot_base http://downloads.lede-project.org/snapshots/packages/mipsel_24kc/base

Run
opkg update
opkg install gcc python-dev --force-overwrite
pip install --upgrade setuptools

Replace step 3 with the following steps...
cd /root
wget https://github.com/foosel/OctoPrint/archive/1.3.1.zip
unzip 1.3.1.zip
cd OctoPrint-1.3.1
pip install -r requirements.txt

Follow the remaining steps but replace OctoPrint-1.0.0 with OctoPrint-1.3.1

pip install --upgrade pip
opkg install python-dev --force-overwrite
pip install netifaces

link text

Im currently running b160. If your interested the output from pip is http://pastebin.com/pCyhgxpP it looks like python cant find the compiler as its missing the cache_cc directory. Did you set any environment variables to point to the GCC compiler?

My printer is the Kodama Trinus3D which is running a proprietary variant of Marlin (I think).