Can not find printer (vps) ubuntu 20.04

[OussJouh]

Hey, i have a printer connected using usb and ethernet in localhost everything works good i can print using USB port (escpos-usb) also using ethernet (escpos-network) after deploying my app to a vps ubuntu 20.04 my printer couldn't be found, USB.findPrinter() return empty array knowing that i have installed sudo apt-get install build-essential libudev-dev as it is required after checking connected usb devices in server using lsusb it doesn't return the connected usb printer

[YovanggaAnandhika]

the module escpos-usb works if you run code to which your computer is connected locally. You cannot perform a print command via usb if the device is not detected in the system manager on the specified device

if my guess is right, your connected device is on another device.

as an alternative, you can use the escpos-network method by forwarding ip and some other things so that your printer can be accessed from outside the network using public ip and DDNS system

[rizalbahriawan]

I also have this issue, I'm running locally from windows and using usb printer, and using zadig, and everything works fine. But when I deploy to server (using ubuntu), the printer isn't printing. Is this way (printing that deployed to server) only works by using network printer, and not usb printer?

[YovanggaAnandhika]

Yes, that's right, USB communication must be the same device when running the ESCPO program. You can use usb communication (plugged in) if the printer is connected locally on the server (in this case ubuntu server).

using a network adapter is the best solution, using a printer that supports IP/Protocol via network cable (UTP), or by using a VPN tunneling service

Hope you can help 👍