prolific usb to serial comm port software reader card gsm

so I found 1 ca-42(com1) for cell phone & 1 usb2serial(com2) for printer. ca-42 & dku-5, have them all for last 3 monthsĮach of it can only use on different version of driver.

that fine if you do not need any detection of the hardware.Įxample: check is the printer online for print, NONE will not provide the offline status.įor save, I am now only use 1 usb2serial device and get motherboard with 2 onboard or add on serial card for serial port.

It still work on NONE detection condition. Using mode set the com? to hardware or XonXoff, if it show none or it cann't be set, then this device's driver BUGs or device is part faulty. Using mode to test the usb2serial device: If have multiple usb2serial even same driver can malfunction because they share the same ser2pl.sys Unless your custom software can set the comport in advance before communicating. If mode status not match with the device manager setting especially the bauds rate, then device not function. if it didn't show up or not show the right speed as for printer will print funny letters, etc. The real 9/25 pins serial port will not show in the mode status, only those USB2serial will be, if got the right setting. Mode status (run cmd, mode) if the setting show or none in the mode status Or put the usb/com device into all usb port one by one, set same setting, so plug into any usb portĪdvance port setting in hardware device manager for usb will not same as Tag the usb port for the usb/com device or visa versa.

Prolific usb to serial comm port software reader card gsm