Hi;

I have this USB modem P300U(SIM600 chip based) which works fine under wind@ws because it has it's own driver, but the clever seller told me that it worked under Linux as well. It was with Redhat 8 but I couldn't get redhat 8 to download.

And until now absolutely false. I have Debian with Kernel 2.6.32-5-686

I just want to send sms through this modem. It's not recognized as modem I'm frustrated because it's not useful for me if it doesn't work on Linux

I hope you can help me.

I looked for info but I can't make it work. What I get in my debian is:

lsusb:

Bus 002 Device 003: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x Composite Device

dmesg:

9857.011649] usb 2-1: new full speed USB device using uhci_hcd and address 3

[ 9857.818942] usb 2-1: New USB device found, idVendor=10c4, idProduct=ea60

[ 9857.818989] usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3

[ 9857.819045] usb 2-1: Product: USB to UART Bridge Controller

[ 9857.819074] usb 2-1: Manufacturer: Silicon Labs

[ 9857.819090] usb 2-1: SerialNumber: 0001

[ 9857.836542] usb 2-1: configuration #1 chosen from 1 choice

[ 9858.016952] usbcore: registered new interface driver usbserial

[ 9858.021410] USB Serial support registered for generic

[ 9858.024480] usbcore: registered new interface driver usbserial_generic

[ 9858.024545] usbserial: USB Serial Driver core

[ 9858.033641] USB Serial support registered for cp210x

[ 9858.035098] cp210x 2-1:1.0: cp210x converter detected

[ 9858.308928] usb 2-1: reset full speed USB device using uhci_hcd and address 3

[ 9858.556607] usb 2-1: cp210x converter now attached to ttyUSB0

[ 9858.556739] usbcore: registered new interface driver cp210x

[ 9858.556772] cp210x: v0.09:Silicon Labs CP210x RS232 serial adaptor driver

[ 9883.779251] cp210x ttyUSB0: cp210x_open - Unable to enable UART

[10060.832317] cp210x ttyUSB0: cp210x_open - Unable to enable UART

Try
http://pharos.ece.utexas.edu/wiki/in...r_-_04/17/2011
You should access this device using /dev/ttuUSB0

Thanks for your reply.

I already tried that solution. I don't receive the "unable to enable" message anymore but I can't connect the modem yet.

In windows it also installs 2 Virtual Serial Ports apart from the physical which is for example COM3 Cygnal ..... Virtual Serial Port COM4 Virtual Serial Port COM6

And I can send AT commands through COM4 and COM6 but not COM3

So I guess it should be similar under Linux, with a Virtual Serial Port, but there is no manage tool for linux grrr and this tool is the one that installs this Virtual Serial Port in windows