I need info how to set up USB GPRS modem.
USB GPRS modem does not work in my linux system. Modem is partly recognized, AT commands can be sent to it ( green led blinks ) but modem does not reply. Minicom will timeout waiting response from modem.
System:
ubuntu 2.6.20-16-server #2 SMP Thu Jun 7 20:26:23 UTC 2007 i686 GNU/Linux
USB GPRS modem GPRS V818G, Prolific chip inside
PC is PentiumIII with Via chipset on motherboard and USB1.1 ports.
When connecting modem to USB /var/log/messages and lsusb shows:
Code:
[ 3723.720000] usb 1-2: new full speed USB device using uhci_hcd and address 2
[ 3723.870000] usb 1-2: configuration #1 chosen from 1 choice
$ lsusb
Bus 002 Device 001: ID 0000:0000
Bus 001 Device 002: ID 067b:0609 Prolific Technology, Inc.
Bus 001 Device 001: ID 0000:0000
some new devices can be found in /dev
Code:
crw-rw---- 1 root root 254, 4 2007-07-30 10:13 usbdev1.2_ep00
crw-rw---- 1 root root 254, 6 2007-07-30 10:13 usbdev1.2_ep02
crw-rw---- 1 root root 254, 5 2007-07-30 10:13 usbdev1.2_ep81
crw-rw---- 1 root root 254, 7 2007-07-30 10:13 usbdev1.2_ep83
no /dev/ttyACMx or ttyUSBx devices appear
Next I modprobe command
#modprobe usbserial vendor=0x067b product=0x0609
dmesg shows:
Code:
[ 5207.390000] usbcore: registered new interface driver usbserial
[ 5207.390000] drivers/usb/serial/usb-serial.c: USB Serial support registered for generic
[ 5207.540000] usbserial_generic 1-2:1.0: generic converter detected
[ 5207.540000] usb 1-2: generic converter now attached to ttyUSB0
[ 5207.540000] usbcore: registered new interface driver usbserial_generic
[ 5207.540000] drivers/usb/serial/usb-serial.c: USB Serial Driver core
now the modem is connected to ttyUSB0
Code:
# ls -l /dev/ttyUS*
crw-rw---- 1 root dialout 188, 0 2007-07-30 10:37 /dev/ttyUSB0
no /dev/ttyACMx appear
I can send data to modem now, green led blinks, but no reply from the modem. I tried pppd and also tried to connect directly with minicom to ttyUSB0.
I also tried modprobe cdc-acm and modprobe pl2303 but that did not help.
