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Created July 25, 2024 18:26
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Use Raspberry Pi Camera with Prusa Connect
Raw
README.md

Use Raspberry Pi and Pi Cam for Prusa Connect

Made this for my PRUSA MINI with a Raspberry Pi Zero 2W and a Raspi Cam v1.3

Based on the great instructions from Nunos and Joltcans

3

Instructions

  1. Go to the Cameras section at https://connect.prusa3d.com
  2. Add a new camera "Add new other camera".
  3. Copy the generated Token
  4. Set up your Raspberry Pi with simpe Raspian OS and enable the camera with raspi-config.
  5. Create a shell script prusaconnect_upload_cam.sh and paste the Token into the file below.

Test

  1. 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.
  2. Start the script with ./usr/local/bin/prusaconnect_upload_cam.sh

If It works you should see the images appearing in Prusa Connect every 10 seconds.

1

Create Autostart Service

To run the script in the background and start it automatically.

  1. Create /etc/systemd/system/prusaconnect_upload_cam.service and paste the content from below.
  2. Start the service: sudo systemctl start prusaconnect_upload_cam.service.
  3. Check if the service is running with sudo systemctl status prusaconnect_upload_cam.service.
  4. Enable the service: sudo systemctl enable prusaconnect_upload_cam.service.
Raw
prusaconnect_upload_cam.service
[Unit]
Description=Raspi Cam to Prusa Connect
[Service]
ExecStart=/usr/local/bin/prusaconnect_upload_cam.sh
[Install]
WantedBy=multi-user.target
Raw
prusaconnect_upload_cam.sh
#!/bin/bash
# Script is from here
# https://gist.github.com/moritzmhmk/48e5ed9c4baa5557422f16983900ca95
# https://gist.github.com/nunofgs/84861ee453254823be6b069ebbce9ad2
# Set default values for environment variables
: "${HTTP_URL:=https://connect.prusa3d.com/c/snapshot}"
: "${DELAY_SECONDS:=10}"
: "${LONG_DELAY_SECONDS:=60}"
# FINGERPRINT can be a random string with at least 16 characters
: "${FINGERPRINT:=123456789012345678}"
# CAMERA_TOKEN generated by the Connect server
: "${CAMERA_TOKEN:=put the token here}"
while true; do
# Grab a frame from the Raspi Cam using FFmpeg, -video_size 1280x720
ffmpeg \
-y \
-f video4linux2 \
-input_format mjpeg \
-video_size 1280x720 \
-i /dev/video0 \
-vframes 1 \
-filter:v "vflip" \
-f mjpeg \
output.jpg
# 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: $CAMERA_TOKEN" \
--data-binary "@output.jpg" \
--no-progress-meter \
--compressed
# Reset delay to the normal value
DELAY=$DELAY_SECONDS
else
echo "FFmpeg returned an error. Retrying after ${LONG_DELAY_SECONDS}s..."
# Set delay to the longer value
DELAY=$LONG_DELAY_SECONDS
fi
sleep "$DELAY"
done
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