Trouble attaching Creator 5 Pro

[nighthawk156]

I am setting up a fresh install of FlashForgeWebUI (v1.2.0-alpha.2) inside a Proxmox LXC container (Debian 12, unprivileged) to connect to a FlashForge Creator 5 Pro in LAN mode.

Both the container (192.168.1.218) and the printer (192.168.1.184) are on the same subnet, but the UI is unable to complete the handshake.

Environment Details
WebUI Version: v1.2.0-alpha.2 (Standalone Linux x64 binary, 175 MB)

OS: Debian 12 (Proxmox LXC)

Printer Model: FlashForge Creator 5 Pro (LAN Mode Enabled)

Network Setup: Same subnet (192.168.1.x)

Observed Issues & Bugs

1. Missing Dropdown Profile
   In the Printer Type dropdown, there is no option for Creator 5 or Creator 5 Pro (even after clearing browser cache on a clean VM install). Only 5M / 5M Pro (New API) and Legacy Printers (Old API) are available.

2. Port Mismatch (ECONNREFUSED on 8899)
   Attempting to connect using 5M / 5M Pro (New API) causes the backend to try to connect to TCP port 8899.

The Creator 5 Pro API communicates over HTTP on port 80 and does not use a check code, resulting in connection refusal:

Socket error: connect ECONNREFUSED 192.168.1.184:8899
3. Frontend Validation Blocks Workaround
Attempting to force the connection port manually in the host field by entering 192.168.1.184:80 triggers a frontend validation error:

"invalid IP address format"
4. Auto-Detection / Probe Failures
Letting the backend auto-scan or probe the IP triggers a 500 error:

[Detection] failed to probe 192.168.1.184: Failed to initialize control
[WebUI] POST /printers/detect - 500 (18383ms)

[AlTracker]

I was struggling with this issue myself, and here is how I temporarily fixed it until an actual person who knows what to do comes and help us XD.

So the precompiled version is old so we gotta compile/npm run it.

but you would still get the same issue so what I did was go to the data/printer_details.json and I found a sample, I replaced it with my printer settings and it worked! here is a sample for the creator 5 pro (the one I use)

{
"lastUsedPrinterSerial": "YOUR_SerialNumber",
"printers": {
"YOUR_SerialNumber": {
"Name": "Creator 5 Pro",
"IPAddress": "YOUR_IP",
"SerialNumber": "YOUR_SerialNumber",
"CheckCode": "YOUR_CODE",
"ClientType": "new",
"printerModel": "Creator 5 Pro",
"modelType": "creator-5-pro",
"commandPort": 8899,
"httpPort": 8898,
"customCameraEnabled": false,
"customCameraUrl": "",
"customLedsEnabled": false,
"forceLegacyMode": false,
"webUIEnabled": true,
"lastConnected": "2026-07-15T17:08:07.697Z"
}
}
}

The way I got the serial number was going to orca to add the printer there, and I clicked on browse, it found my printer and gave me the serial number (where I used it here)

hope this helps.

[nighthawk156]

Thanks, ill have been trying this and no luck. Where did you get CheckCode?

[AlTracker]

Thanks, ill have been trying this and no luck. Where did you get CheckCode?

you get it from the printer once you put it in lan mode it will give you, it's called device id in the printer settings