Duet Timelapse Service

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As 3dprinter owner with duetWifi board I want to create awesome timelapse

What is it?

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It's small service write in go that: listen to telnet and execute command.

It will also serve the last image taken.

What I need?

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• DuetWifi board with telnet open

M586 P2 S1 ; Enable Telnet

• Rasberry pi zero with camera configure

• Pi camera

• Genrated gcode file with:

  • "print start" command sent on telnet

    M118 P4 S"print start"

  this will execute scripts/print_start.sh create timelapse folder & delete old timelapse files

  • On layer change

  M118 P4 S"layer changed [layer_num]"

  scripts/snapshot.sh taking image & updating latest image to serve

  • Print finish

  M118 P4 S"print finish"

  scripts/print_finish.sh

  create tar gzip from timelapse folder with timestamp

Creating video from timelapse folder

The second part relay on windows machine with:

• ffmpeg install
• Git bash

Make it work!

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Connect to your pi zero using ssh and run installtion script

wget -O - https://raw.githubusercontent.com/doryosef/dts/master/install.sh | sudo sh

Edit the configuration file /opt/dts/conf.ini.

[telnet] section host paramter to your duetwifi ip

execute the following commands

sudo systemctl daemon-reload
sudo systemctl start dts
sudo systemctl enable dts.service
sudo systemctl status dts

Now print some stuffs

On your windows pc download timelapse.sh file and edit the host to your pi zero ip open git bash and execute $./timelapse.sh

It will:

• Connect to your pi zero using sftp (read below tip to use ssh key connection without password)
• Download tmielapse tar gzip files
• Delete the tmielapse tar gzip files from server
• On local it will extract the files
• Create movie using ffmpeg
• Clean temp directory

Tips

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Use ssh key to connect to your zero pi

On windows open git bash and execute command
	$ ssh-keygen -t rsa
Then execute command
	$ ssh-copy-id pi@remote_host
It will try to connect and will automatically copy the public key to the machine
Now try to login
	$ ssh pi@remote_host

Add commands

Add to conf.ini under [commands] section your own command

work with usb camera

Change scripts/snapshot.sh from raspistill to fswebcam

clear the log file

send M118 P4 S"clear log"