Python script to start print
Hey,
I would like to create a python script that could set my printer as 'ready' so that it would process the next job in the print queue.
Any pointers on how to get started with this?
I did write functional scripts for the mini that simply pulled telemetry data, but I am struggling with my I3 printers.
Should I address Prusa Link or Prusa Connect and is there any API documentation with some examples?
...
OR... what I am really after is a way to schedule a print job to start at a particular time, but I figure I can schedule that myself once / if I can get a script functioning.
Thank you
RE: Python script to start print
Hi, i think there's no API for setting your printer to ready. But the jobs should be able to be scheduled, so once the feature is there, you'd just set your printer to ready ahead of time, then the job would start at the set time. There might be one possible way to script this, but it's a hack on top of a hack. You can create the folder PrusaLink menu in the root of your printer's SD card. PrusaLink should create a file setready.g in this folder automatically. (see release notes for 0.7.0rc1) You'd then ask the printer to print that file over the API documented on our github under Prusa-Link-Web but please remember that it is janky as all heck and might not work.
RE: Python script to start print
Octoprint will do many of the things your trying to do. Plus Octoprint has a API and plugins are usually written in python, which gives you a head start.
If your not aware of Octoprint, it accepts files (most conveniently from Prusaslicer directly) and streams via a raspberry to your printer. IIRC both Min and Mk3 are supported.
RE: Python script to start print
RE: Python script to start print
Thank you!!
I am keen to stick with Prusa Connect & Link for now.
Happy to share that after sleeping on it, I found what I was looking for, it looks this (at it's most basic level):
#!/usr/bin/env python3
import requests
from requests.auth import HTTPDigestAuth
import pprint
import json
response = requests.get(
'http://{local IP of Prusa printer}/api/job',
auth=HTTPDigestAuth('prusa-link-username', 'prusa-link-password')
)
pretty_response = json.loads(response.content)
pprint.pprint(pretty_response)
I will write up a blog article about this, nickjvturner.com
The piece I was missing was the authentication type which is specifically 'Digest Auth' with algorithm 'MD5-sess' (required if you want to explore using Postman).
The code snippet above only GETs info, but it is also possible to POST to the same end point, with a payload of:
{
"command": "start"
}
This triggers the currently loaded project to start-up.
Thank you to everyone at Prusa, Connect is fantastic!
RE: Python script to start print
Oh sorry, I did not create the API and it shows 😅
RE: Python script to start print
no problem at all! 🙂