Hi all
I need some advise. I have a fully working module that talks to my Epson TM-88IV thermal printer on comport and it works perfectly
And now I want to try and use a USB version of it
So I have found on my system /dev/usb/lp1 and I can echo to it with no problems
The problem I seem to have is when I try to open the port in my status module I get a error message saying "Stream is closed"
Do I handle usb connected devices differently then serial? Some advice would be welcomed.
I can easily add a option for usb to the current module as long as I know what I need to update (I assume one the dev is open it should still communicate the same within the code)
If anyone needs to see the actual module I can upload that
Andy
USB PoS Printer advise
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USB PoS Printer advise
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- Settings file (sorry for it being so far away)
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- Error message on screen
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- BruceSteers
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Re: USB PoS Printer advise
how exactly do you try to open it?
If at first you don't succeed , try doing something differently.
BruceS
BruceS
- cogier
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Re: USB PoS Printer advise
From what I can see, there is a Linux Printer driver for your printer. Why not install that and just send a page to the printer or as I do with a Zebra Printer, create a PDF file and send that to the printer?
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Re: USB PoS Printer advise
If I used the driver I loose all controlcogier wrote: ↑Wednesday 28th February 2024 4:46pm From what I can see, there is a Linux Printer driver for your printer. Why not install that and just send a page to the printer or as I do with a Zebra Printer, create a PDF file and send that to the printer?
Over the printer and I will not get any status about the cash drawer etc from the printer.
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Re: USB PoS Printer advise
I was trying to open it just like a Serial Printer
Global.PrinterPort = New SerialPort As "PrinterPort"
With Global.PrinterPort
Try .Close
.PortName = Global.PortName
.Speed = Global.BandRate
Select Case Global.FlowControl
Case "Hardware"
.FlowControl = Global.PrinterPort.Hardware
Case "Software"
.FlowControl = Global.PrinterPort.Software
Case "None"
.FlowControl = Global.PrinterPort.None
End Select
.DataBits = Global.DataBits
.StopBits = Global.StopBits
Select Case Global.Parity
Case "None"
.Parity = Global.PrinterPort.None
Case "Odd"
.Parity = Global.PrinterPort.Odd
Case "Even"
.Parity = Global.PrinterPort.Even
End Select
End With
Select Case ConnectionType
Case "Open"
Try Global.PrinterPort.Open
Case "Close"
Try Global.PrinterPort.Close
End Select
If Error Then
Global.AddToScreenList("Error connecting to printer")
Else
Global.AddToScreenList("Connected to printer")
EpsonPrinterInitialize
End If
I know it is not a Serial device so I would need to do some update to my code to work with the USB Printer
- cogier
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Re: USB PoS Printer advise
I found this command online tail -f /var/log/syslog. If you run the command in Terminal, then change the cash draw status, you may be able to see it as it happens. (Press [Ctrl]+C to exit). Every time I changed a USB, or turned a printer on, data poured in.If I used the driver I loose all control
Over the printer and I will not get any status about the cash drawer etc from the printer.
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Re: USB PoS Printer advise
Hi @cogier I tried that and I get nothing showing upcogier wrote: ↑Thursday 29th February 2024 10:48amI found this command online tail -f /var/log/syslog. If you run the command in Terminal, then change the cash draw status, you may be able to see it as it happens. (Press [Ctrl]+C to exit). Every time I changed a USB, or turned a printer on, data poured in.If I used the driver I loose all control
Over the printer and I will not get any status about the cash drawer etc from the printer.
I have install my development IDE (gamabs3) onto the PoS Terminal that has the USB printer attached (/dev/usb/lp0) I have chmod 777 the port so anyone can access it and when I run the printer module now insde the IDE I get the following error message "Unable to get configuration: Inappropriate ioctl for device"
I was setting it to /dev/usb/lp0 and speed of 115200
am I thinking along the right lines for the USB Printer or do I need to re think this?
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Re: USB PoS Printer advise
After a lot of googling and asking ChatGPT I have come up with the following code (Still needs work though)
But I am still getting a Error connecting to USB Printer and then the same error message steam is closed (#53) could some one have a look and see if I am on the right lines (should the device not show up as a /dev/ttyUSB and not /dev/usb/lp1 (im on debian))
Chatgpt came up with this one
Of course I have had to update it to work
Global.PrinterPort = New SerialPort As "PrinterPort"
With Global.PrinterPort
Try .Close
.PortName = Global.PortName
End With
Select Case ConnectionType
Case "Open"
Try Global.PrinterPort.Open
Case "Close"
Try Global.PrinterPort.Close
End Select
If Error Then
Global.AddToScreenList("Error connecting to USB Printer")
Else
Global.AddToScreenList("Connected to USB Printer")
EpsonPrinterInitialize
End If
But I am still getting a Error connecting to USB Printer and then the same error message steam is closed (#53) could some one have a look and see if I am on the right lines (should the device not show up as a /dev/ttyUSB and not /dev/usb/lp1 (im on debian))
Chatgpt came up with this one
Public sub Main()
Dim SerialPort as Serial
SerialPort = New Serial("/dev/usb/lp1")
if serialport.open() then
'Send Commands
Serial.write ("your commands here")
serial.close
else
Print "Error Opening Serial (USB) Device"
End if
Of course I have had to update it to work