BSnotify

Use Bambu Studio or Orca Slicer with printers outside your LAN.

Bambu Lab printers have a LAN only mode to avoid relying on cloud services for general tasks. One limitation is that Bambu Studio can only find your printer when both are on the same LAN. Discovery happens using SSDP but due non-standard/broken implementation it does not work when they are on different LANs. Since BS lacks the simple ability to add printer via IP, SSDP is the only way.

Thats where bsnotify comes in, it will notify BS of printers outside your LAN.

Tested on Linux and Windows with P1P. Tested on MacOS and Linux with X1C.

Requirements

• Python 3
• Printer set to LAN only mode
• Info from your printer:
  • IP address
  • Serial Number
  • Access Code
• Run bsnotify on the same LAN as your slicer (the device running Bambu Studio).

python3 bsnotify <printer-ip> <printer-serial-number>

Optional: Specify the source address(es) as comma separated values. This will allow for broadcasting on specific network(s) from a server or router (such as a Unifi Dream Machine) that has multiple interfaces.

python3 bsnotify <printer-ip> <printer-serial-number> <local address(es)>

By default, bsnotify generates the printer name from its serial number (3DP-<SER>-<IAL>). You can override this name with your own name:

python3 bsnotify <printer-ip> <printer-serial-number> <local address(es)> <printer-name>

The Details

• Printer SSDP server does not seem to respond to SEARCH requests in any format.
• Printer periodically sends out the following NOTIFYs :
  • to 255.255.255.255:2021 - BS responds to this
  • to 239.255.255.250:1990 - BS ignores this
• BS sends out SEARCH requests but never gets a reply.
• This script spoofs the multicast response from the printer but on the network that you're using for Bambu Studio. Even if you add the device manually, Bambu Studio still expects this multicast packet.

Optional: Installing as a service on linux

Git clone, scp, copy-paste, etc. bsnotify.py to /etc/bsnotify (or whatever filepath you want, but make sure to specify in the service file)

Create a file /etc/systemd/system/bsnotify.service (fill in the values for the command)

[Unit]
Description=BSNotify Service to enable Bambu Studio across VLANs

[Service]
Type=simple
ExecStart=python3 /etc/bsnotify/bsnotify <printer-ip> <printer-serial-number> <local address(es)>

[Install]
WantedBy=multi-user.target

Run

systemctl daemon-reload
systemctl enable bsnotify.service
systemctl restart bsnotify.service 
systemctl status bsnotify.service

Example output:

bsnotify.service - BSNotify Service to enable Bambu Studio across VLANs
     Loaded: loaded (/etc/systemd/system/bsnotify.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2025-01-02 17:14:04 CST; 11s ago
   Main PID: 3907202 (python3)
      Tasks: 3 (limit: 4724)
     Memory: 8.9M
        CPU: 164ms
     CGroup: /system.slice/bsnotify.service
             └─3907202 python3 /etc/bsnotify/bsnotify 10.2.1.100 XXXXXXXXXX 10.1.1.1,10.3.1.1

Jan 02 17:18:04 Router-1 systemd[1]: Started BSNotify Service to enable Bambu Studio across VLANs.
Jan 02 17:18:04 Router-1 python3[3907202]: 10.1.1.1 coroutine running...
Jan 02 17:18:04 Router-1 python3[3907202]: 10.3.1.1 coroutine running...
Jan 02 17:18:39 Router-1 python3[3907202]: SSDP NOTIFY for printer 3DP-XXX-XXX ( 10.2.1.100 ) sent to 255.255.255.255 2021 from address: 10.1.1.1
Jan 02 17:18:39 Router-1 python3[3907202]: SSDP NOTIFY for printer 3DP-XXX-XXX ( 10.2.1.100 ) sent to 255.255.255.255 2021 from address: 10.3.1.1