User's Manual

Date: 2010/08/05

Version: 2.2

Status: Released

18/20

2) Give the command "dmesg" to check the USB device

COMMAND: "sudo dmesg"

The response will look something like this; There are seven (7) USB virtual ports are created.

[…]

[ 193.208068] usb 3-1: new high speed USB device using ehci_hcd and address 2

[ 193.341716] usb 3-1: config 1 interface 0 altsetting 0 endpoint 0x81 has an

invalid bInterval 255, changing to 11

[ 193.345899] usb 3-1: configuration #1 chosen from 1 choice

[ 195.670484] usb 3-1: USB disconnect, address 2

[ 196.380089] usb 3-1: new high speed USB device using ehci_hcd and address 3

[ 196.521656] usb 3-1: configuration #1 chosen from 1 choice

[ 196.888823] cdc_acm: This device cannot do calls on its own. It is no modem.

[ 196.889696] cdc_acm 3-1:1.0: ttyACM0: USB ACM device

[ 196.891099] cdc_acm: This device cannot do calls on its own. It is no modem.

[ 196.891929] cdc_acm 3-1:1.2: ttyACM1: USB ACM device

[ 196.892971] cdc_acm: This device cannot do calls on its own. It is no modem.

[ 196.893811] cdc_acm 3-1:1.4: ttyACM2: USB ACM device

[ 196.894878] cdc_acm: This device cannot do calls on its own. It is no modem.

[ 196.895706] cdc_acm 3-1:1.6: ttyACM3: USB ACM device

[ 196.903459] cdc_acm: This device cannot do calls on its own. It is no modem.

[ 196.937744] cdc_acm 3-1:1.8: ttyACM4: USB ACM device

[ 196.938853] cdc_acm: This device cannot do calls on its own. It is no modem.

[ 196.939668] cdc_acm 3-1:1.10: ttyACM5: USB ACM device

[ 196.940707] cdc_acm: This device cannot do calls on its own. It is no modem.

[ 196.941535] cdc_acm 3-1:1.12: ttyACM6: USB ACM device

[ 196.942590] usbcore: registered new interface driver cdc_acm

[ 196.943170] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems

and ISDN adapters

[…]

3) You can also check if the ports are there by list the “/dev/ttyACM*”

COMMAND: "sudo ls /dev/ttyACM*"

The response will look something like this;

/dev/ttyACM0 /dev/ttyACM2 /dev/ttyACM4 /dev/ttyACM6

/dev/ttyACM1 /dev/ttyACM3 /dev/ttyACM5

ttyACM0: Modem (Data port)

ttyACM1: L2/L3 debug trace; 2G L1 trace port

ttyACM2: 3G L1 debug trace

ttyACM3: AT Command

ttyACM4: reserved for future use

ttyACM5: reserved for future use

ttyACM6: reserved for future use