get the data of the actual positions of the axis from Moonraker with a HTTP-Responce

[Syldan]

Hello all,

I have a problem to get the data of the actual positions of the 3D-printer. I have connected my computer to the Raspberry Pi with an Ethernet-cable. This is my Python Code to read out the position (the g-code position).

import requests
import time

moonraker_ip = "192.168.1.2"
api_endpoint = f"http://{moonraker_ip}/printer/objects/query?gcode_move&toolhead&extruder=target,temperature"
session = requests.Session()

try:
    while True:
        
        # HTTP-Anfrage senden      
        response = session.get(api_endpoint)
        
        # Überprüfen, ob die Anfrage erfolgreich war (Statuscode 200)
        if response.status_code == 200:
            # Antwort als JSON-Daten erhalten
            data = response.json()
            
            # Positionsdaten des Extruders aus den erhaltenen Daten extrahieren
            extruder_position = data['result']['status']['toolhead']['position']
            
            # X-, Y- und Z-Position des Extruders extrahieren
            x = extruder_position[0]
            y = extruder_position[1]
            z = extruder_position[2]
            
            # Zeitstempel erzeugen
            zeitstempel = data['result']['eventtime']
            
            # Ausgabe erstellen
            output = f"{zeitstempel} - Extruderposition (mm): X: {x}, Y: {y}, Z: {z}"
            
            print(output)
            
        else:
            # Anfrage war nicht erfolgreich
            print(f"Fehler bei der Anfrage. Statuscode: {response.status_code}")
        time.sleep(1)
except requests.exceptions.RequestException as e:
    # Fehler bei der Verbindung oder Anfrage
    print(f"Fehler bei der Verbindung: {e}")

I would like to read out the actual position of the printer like when using mainsail for example. If i move the extruder head in z direction from 100 mm to 200 mm the output of my Python Program is in like that:

135.096046468 - Extruderposition (mm): X: 491.0, Y: 1079.0, Z: 100.0
135.848502978 - Extruderposition (mm): X: 491.0, Y: 1079.0, Z: 200.0

That means I am using the wrong variable the read out the position, because it just shows me the "gcode"-position.

Did someone had a similar problem and have solved that problem?

[Scronkfinkle]

Googling for this question brings me to this discussion, and since I don't see the answer anywhere else, I'll share it here.

You're looking for the live_position field from the /printer/objects/query?motion_report endpoint.

E.g.

curl http://$PRINTER_HOST/printer/objects/query?motion_report | jq
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   329  100   329    0     0   3339      0 --:--:-- --:--:-- --:--:--  3357
{
  "result": {
    "eventtime": 1043241.436857716,
    "status": {
      "motion_report": {
        "live_position": [
          10,
          155,
          115.75734567901236,
          42837.19272000001
        ],
        "live_velocity": 0,
        "live_extruder_velocity": -1.0000000000000018,
        "steppers": [
          "extruder",
          "stepper_x",
          "stepper_y",
          "stepper_z",
          "stepper_z1"
        ],
        "trapq": [
          "extruder",
          "toolhead"
        ]
      }
    }
  }
}