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| | [https://github.com/ctag/cerealbox Github files for this project]. | | [https://github.com/ctag/cerealbox Github files for this project]. |
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| − | == Cerealbot Code ==
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| − | Underneath the queue is a hodge podge of shell scripts and C programs.
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| − | Current System:
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| − | Shell script hooks bound to Octoprint's "printStart" and "printDone" events. These handle setting the flag which indicates a part is being printed/removed. Once a part is being removed, its corresponding gcode is deleted from the queue.
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| − | A cron job checks the printer status and queue for a match of "free printer + file to print" and then kicks off the print job.
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| − | A C program acts as a buffer to the arduino and allows the shell scripts to control hardware in a easy to use but complicated to setup manner.
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| − | === API ===
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| − | Curl is great for testing around with both Octoprint and RedQueen's api, but I've switched the shell scripts to use [https://github.com/micha/resty resty] for ease of maintenance.
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| − | <pre>
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| − | Curl Examples
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| − | To RedQueen:
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| − | curl --data "{\"message\":\"${MSG}\", \"channel\":\"##rqtest\", \"isaction\":false, \"key\":\"${APIKEY}\"}" https://crump.space/rq/relay -H "Content-Type:application/json"
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| − | To Octoprint:
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| − | curl -H "X-Api-Key:$OCTO_API_KEY" http://bns-daedalus.256.makerslocal.org/api/printer -o /tmp/printr_status.json
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| − | </pre>
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| − | == Webcam ==
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| − | To list available formats:
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| − | <pre>
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| − | v4l2-ctl --list-formats
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| − | </pre>
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| − | or
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| − | <pre>
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| − | v4l2-ctl -d /dev/video0 --list-formats-ext
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| − | </pre>
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| − | ==== Octoprint ====
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| − | To use an http stream with octoprint, the URL has to be formatted correctly.
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| − | At first glance, I tried: cerealbox.256.makerslocal.org:8081, which didn't work.
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| − | Turns out Octoprint blindly appends a GET variable to the URL, which turns the above into: cerealbox.256.makerslocal.org:8081?2354jk345 which isn't a valid URL anymore.
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| − | So, you have to set up the webcam URL like: http://cerealbox.256.makerslocal.org:8081/
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| − | Here the trailing slash lands the GET variable. It took Hunter Fuller to figure all that out.
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| − | ==== mjpg-streamer ====
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| − | [https://github.com/jacksonliam/mjpg-streamer mjpg-streamer] is by far the best solution for webcam streaming from the RPi. A recent update brought immense relief for CPU overhead.
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| − | Base command to run:
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| − | <pre>
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| − | mjpg_streamer -b -i "./input_uvc.so -d /dev/video0 -n -f 5 -r 1280x720" -o "./output_http.so -p 8080 -w ./www"
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| − | </pre>
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| − | Previously I've used the -y flag for compatibility, which totally crushed the little CPU, but the most recent build of mjpg-streamer appears to work quite well with my Logitech webcam using the default MJPG codec.
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| | == Slic3r Config == | | == Slic3r Config == |
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| | == Octoprint Server - RPi == | | == Octoprint Server - RPi == |
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| − | === Authbind ===
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| − | tl;dr: haproxy ''bad'', authbind '''good'''.
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| − | In '/etc/default/octoprint' Set port to 80 and uncommand the extra arguments.
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| − | In '/etc/init.d/octoprint' Add 'AUTHBIND=/usr/bin/authbind' to the variable declaration section and then find the invocation of $DAEMON and add $AUTHBIND directly in front of it (with a space). When you restart the service, it should come up on port 80.
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| | === Raspbian - Debian === | | === Raspbian - Debian === |
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| | Right now I'm streaming the webcam from v4l-mjpg-streamer, total pain, will look for something better. | | Right now I'm streaming the webcam from v4l-mjpg-streamer, total pain, will look for something better. |
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| − | == Protips ==
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| − | === BYOBU ===
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| − | * F1 allows you to set "log into byobu" to save some time while logging in.
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| − | * 'C-a a' will send C-a to screen, so that you can use screen within byobu to debug the printer's serial connection.
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Latest revision as of 03:08, 9 June 2015
Github files for this project.
Slic3r Config
I'm still working on a Slic3r config, its on github.
Octoprint Server - RPi
Raspbian - Debian
Archlinux
To run octoprint from port 80 as user 'octoprint', I adjusted the systemd unit file to launch with authbind.
[Unit]
Description=Octoprint 3d Printing Web Server
After=network.target
[Service]
User=octoprint
Group=octoprint
Type=simple
ExecStart=/usr/bin/authbind --deep /usr/bin/octoprint --port 80
Restart=on-failure
[Install]
WantedBy=multi-user.target
Right now I'm streaming the webcam from v4l-mjpg-streamer, total pain, will look for something better.
