how to make the serial port run faster

[user1453]

does anyone know of a way to make the serial port run faster in windows? mines linited to 128kbps, I want to run some dmx based stuff and that requires 250kbps

anyone know a way to do this?

[directhex]

RS232 is limited to 115,200 bits per second (14.0645 KiB/s)

[user1453]

the system I'm wanting to use it with is based on rs485, is there anyway to boost the speed to 250Kbps

kilobits per second

[Agent]

Go into device manager and select the port - in its properties you will see the option to alter its speed IIRC.

[user1453]

that list only goes up to 115Kbps I was woundering if tere was a registery mod to add 250Kbps to the list

[TheAnimus]

it depends on the SIE (Serial interface encoder)

Some will even do upto a megabyte a second (can't remeber chipset number off top of mi head sorry). RS232 has no limit on signal transmission

But the device your talking to has to support it.

The list in device manager is adapative to the chipset, so either the driver is wrong, or the SIE dosen't support it.

485, is VERY different to 232 iirc. Voltage, and pin assignment been different.

Its also worth noting that the speed you set in device manager is actually the default speed, most applications don't use the default they manually specify the baud rate (speed), the parity, the stop. so its worth checking the software settings.

[user1453]

so could I se hypertermainal and somehow set it to 250kbps?

[TheAnimus]

indeed, i'm on a tablet that has no rs232, but the virutal COM port for the bluetooth interface is 921,600 max speed. not shabby!

Once again you must be aware of the difference between 485 and 232, else you WILL get magic smoke.

You will find a lot of the PCI RS232 controllers have a much bigger max baurd rate than the build in ones (as they use better sie)