Prusa Connect Webcam upload

README.md

From Nunos great instructions

Instructions

1. Go to the Cameras section at https://connect.prusa3d.com
2. Add a new camera.
3. Click the QR code link
4. Click "Start Camera"
5. Open your browser's inspector window and look for the "/snapshot" request.
6. Copy the "Fingerprint" and "Token" headers into the file below.
7. Save prusaconnect_upload_cam.sh from below to /usr/local/bin/prusaconnect_upload_cam.sh and make it executable chmod +x /usr/local/bin/prusaconnect_upload_cam.sh.

Service

To run in the background, create /etc/systemd/system/prusaconnect_upload_cam.service and then start and enable it: systemctl enable --now prusaconnect_upload_cam.service.

prusaconnect_upload_cam.service

[Unit]
Description=Raspi Camera to Prusa Connect

[Service]
ExecStart=/usr/local/bin/prusaconnect_upload_cam.sh

[Install]
WantedBy=multi-user.target

prusaconnect_upload_cam.sh

#!/bin/bash

# Set default values for environment variables
: "${HTTP_URL:=https://webcam.connect.prusa3d.com/c/snapshot}"
: "${DELAY_SECONDS:=10}"
: "${LONG_DELAY_SECONDS:=60}"
: "${FINGERPRINT:=<fingerprint>}"
: "${TOKEN:=<token>}"

while true; do
    # Delete the previous image since libcamera-jpeg won't overwrite
    rm -f /tmp/prusa_output.jpg 2> /dev/null

    # Grab a frame from the Raspi Camera
    libcamera-jpeg -o /tmp/prusa_output.jpg -q 80 --width 800 --height 600 -n

    # If no error, upload it.
    if [ $? -eq 0 ]; then
        # POST the image to the HTTP URL using curl
        curl -X PUT "$HTTP_URL" \
            -H "accept: */*" \
            -H "content-type: image/jpg" \
            -H "fingerprint: $FINGERPRINT" \
            -H "token: $TOKEN" \
            --data-binary "@/tmp/prusa_output.jpg" \
            --no-progress-meter \
            --compressed

        # Reset delay to the normal value
        DELAY=$DELAY_SECONDS
    else
        echo "libcamera-jpeg returned an error. Retrying after ${LONG_DELAY_SECONDS}s..."

        # Set delay to the longer value
        DELAY=$LONG_DELAY_SECONDS
    fi

    sleep "$DELAY"
done

I am having trouble getting this to work. I am not sure what I did wrong I have everything created and in the correct spot.

When I run systemctl enable --now prusaconnect_upload_cam.service it ask me for the password 3 times is that normal or did I miss something

@jeepgod Can you provide any additional information? I don't know what is prompting you for a password. Is it sudo, the actual service script somehow, or something else?

I'm happy to help, but I have no clue as of yet.

I am new to doing this kind of thing. I used Nano to create prusaconnect_upload_cam.sh & prusaconnect_upload_cam.service in their correct directories. I copied each line one at a time and kept the spacing as best as I could. The Token and Fingerprint where swapped with correct information but I was unsure if I should keep < >. after doing all that I ran the commands listed above and got the follow requesting my password 3 times.

@jeepgod To run systemctl commands, you need to do them with sudo. Those are system-level scripts that need escalated privileges to run.

I tried to get this working with my Logitech USB webcam (already installed on printer), but libcamera-jpeg could not detect it. As a workaround, I use fswebcam which can be installed via sudo apt install -y fswebcam.

Just replace line 15 in the script above:

    # Grab a frame from the Raspi Camera
    #libcamera-jpeg -o /tmp/prusa_output.jpg -q 80 --width 800 --height 600 -n
    # Grab a frame from USB webcam
    fswebcam -r 800x600 --jpeg 80 -D 0 /tmp/prusa_output.jpg

This also on a x86 linux (e.g. LXC on Proxmox)