I switched to LAN only mode on the P1P soon after purchasing it, and it’s been working fine for months.
I decided to install Bambu Studio on my laptop, and it connected also in LAN mode to the printer.
Since doing that, I can no longer connect to the printer via my desktop PC in LAN mode, it just doesn’t show the printer.
I’ve tried:
Reinstalling Bambu studio (and Orca slicer).
Restarting the printer and PC several times.
Switching to ‘everyone can see my proprietary work’ internet mode, then back to LAN mode.
Running network sniffers to see if it’s suddenly decided to block ports (nothing found).
Removing and re-adding the Wireless configuration.
The whole time, the laptop is working fine in LAN mode (and suspecting one connection may be preventing the other, I’ve switched the laptop off, and reinstalled Bambu and Orca slicer on the laptop).
I have seen this ‘Does LAN mode have a maximum number of connections?’ but there is nothing suggesting what the solution may be to remove my laptop from the mix. Will I need to reset to factory defaults?
I followed the steps below, and found some issues, but the actual solution is much easier:
Reset the printer to factory defaults
Use the Bambu Handy app to reconfigure it
a. If using Android, use Bluetooth to connect to the printer properly PRIOR to attempting to connect via the ‘Handy’ App.
Switch it to LAN Only mode.
Note: At this point I attempted to reconnect to the printer from my desktop, but it still wouldn’t see it… you may be luckier if you have a different network.
Connect a Wireless dongle to the PC and connect to the same WLAN as the printer.
Open Bambu Studio and log out (may also need to restart the app) and test the connection, mine showed the printer (yay) but after waiting for the icon to change from (-) to [LAN] then the lock icon and prompting me for the pass code, I received ‘…error =-1’.
Disable the WLAN dongle and remove it.
Enable the LAN network card.
Try again to connect to the printer, and enter the pass code.
Burn the laptop to ensure you don’t accidentally open Bambu Studio on another device.
Write a stern letter to Bambu about how proprietary software costs them more money than open software in terms of support and future sales.
The actual solution is to recognise that only one device can read something on the P1P (and evidentially P1S) at any time. I have Homeassistant running MQTT calls to both printers, and as soon as a slicer connects to either printer, I lose connection via MQTT.
With that in mind, you may still find that connecting two or more computers to the same printer via a slicer gives you the same problem, but fixing it ‘should’ be a case of removing the other installation, resetting the printer, and reconnecting on only one PC with a slicer.
I’m glad you resolved the problem, but the solution reminded me of a question: Operating through the cloud, or LAN-only, why does the printer or app need Bluetooth access? Everything I can think of works over wi-fi, even at distances well beyond Bluetooth range. Without wi-fi, nothing works over Bluetooth.