I put everything up on GitHub so others don’t have to reinvent the wheel: 👉 https://github.com/Houzvicka/RPi-Prusa-Connect-Cam

Why would I need to do all these backflips to hook up a camera? Use an old cell phone, that's your solution? Two machines to power up, setting up the app. It's really a shame.  Why not just add a USB port on your custom board, like the mk3, so a cheap webcam could be added? No extra power, no app, no extra setup, which all have to be done every power up?

Josef, your contributions have benefited every single 3d printing enthusiast. (And your contribution is remarkably selfless considering your open source commitment has taken $millions from your own pocket.) But damn, why were so many excellent features of the MK3 forgotten?

Then save it on a microSD and insert it in the Raspberry pi that you intent on using? And since I am here asking about this, I've got a Raspberry Pi 4B with a Raspi cam V2. Is that a compatible setup for your current script? Or should I adjust it to my devices, and if so, how would one go about adjusting it to the devices I intent on using?

It would be a great help if you're able to tell me how I could fix it, should it even be possible.

Thanks in advance!

In the end, I was able to connect the camera using the first method. It did work well on prusaconnect. The only problems was that I had to manually setup the camera link in the RPI each time I booted up. This was too cumbersome as it required keyboard/monitor be attached. Most likely I'm doing it wrong.

The code is way above my ability, but maybe one day I'll figure it out. I appreciate your time in sharing.

Ultimately, I'm planing on ditching the camera idea and using the RPI as a gaming emulator, LOL.

Other things that I had to find out by looking at the forums that aren't documented on the API page. Printer has to be online in order for uploads to update on connect dashboard. 

#!/bin/bash

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

while true; do
    # Delete the previous image
    rm -f /tmp/prusa_output.jpg 2> /dev/null

    # Grab a frame from the Raspi Camera
        wget -O /tmp/prusa_output.jpg http://localhost:8080/?action=snapshot

    # If no error, upload it.
    if ; 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 "wget returned an error. Retrying after ${LONG_DELAY_SECONDS}s..."

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

    sleep "$DELAY"
done

1. Go to https://connect.prusa3d.com and click on the Camera tab.

2. Click on the "Add a new web camera"

3. You will see a QR code - point your camera at the screen displaying the QR code.

4. Nothing happens.  Now, if this was a cellphone you'd click on the resulting link and everything would be fine.  I don't know if it's the browser not recognizing QR Codes, or I should be using a special scanning app, but I didn't research it much further.  I worked around this as follows:

5. You need to construct a URL from the registration ID on the webpage like this:  https://webcam.connect.prusa3d.com/?token=xyZaBcDef4hXmkURJ8HO.  On my Mac, I can right-click on the QR code and copy the registration link, but you can just copy the token and add it to the URL manually if you need to.

6.  On the RPi, open a web browser and enter the URL from step 5.  The token is what links the connect session to the camera session on the RPi.

In an effort to get a camera working with Prusa Connect, I setup a RPI 4 with webcam. I was able to get the whole thing working with Octoprint and can see the webcam video. However, I can't figure out how to add the camera to Prusa Connect.

I know it doesn't work with Prusalink on the MK4, but some forum posts seem to imply it can with Prusa Connect. Is this true? 

Thanks!