baud rate

[ktlee3]

hi,

first

may i know what is the baud rate for hp lj p2055dn?

secondly,

Unfortunately my machine controller is having lower Baud Rate.

My controller is having rate as below,

1200,

2400,

4800,

9600,

19200

38400

The printer’s baud rate is too high for my controller.

Is there anyway I can reset/tune the printer’s baud rate or any baud rate converter I can purchase from HP?

Please advice what I do to link my printer with the controller.

Thank you very much.

regards,

KT LEE

EMAIL : ktlee@3tone.com.my / kteng_lee@yahoo.com

[Matti_Kurkela]

The LaserJet P2055dn has only gigabit Ethernet and high-speed USB 2.0 connectors.

Your baud rates seem applicable to a RS-232 serial port.

A USB bus needs exactly one of the connected devices to act as a USB host controller, which is a rather complex task in itself. A printer usually cannot do that: unless the printer is specifically equipped with a dual-role USB controller (known as "USB-on-the-go"), it can only act as a USB endpoint device.

So you cannot transmit data from a serial port to a USB-based printer with a simple USB-to-serial converter that is sold for computers: such converters usually expect the USB side to act as a USB host controller, not as a regular USB endpoint device.

You might get better results with a "serial device server". One type I've used in the past is Moxa NPort 5110:

http://www.moxa.com/product/NPort_5110.htm

It is good, but rather expensive; you may be able to find similar products with a better price.

(If you are in an industrial automation environment, you might even have similar devices around already.)

Essentially, it is a serial-to-network adapter. It includes a small computer that can be configured to contact to a particular IP address and port, and send incoming data from its serial port to that destination. It will handle all the common serial port baud rates.

By configuring your printer with some IP address, and then configuring the serial device server to connect to that IP address and port 9100, you'll get a network based "serial cable equivalent". You could use a crossed Ethernet cable to connect the serial device server directly to the printer, or plug both devices to network at your site to effectively remove all distance limitations between the controller and the printer.

[kevin_adams]

It might help if you can provide information on what make and model the controller is, if it is RS232 then you should not try direct connection to the network port on the printer as the voltages are different.