If I connect a device to a USB port, how do I know how to address it viacu
?
A couple of my USB modems can be accessed using /dev/cuaU0.0 but a Huawei E3372 (LTE modem) complains about this assignment.
Jan 22 21:25:28 ppp[3016]: Phase: Using interface: tun0
Jan 22 21:25:28 ppp[3016]: Phase: deflink: Created in closed state
Jan 22 21:25:28 ppp[3020]: Phase: PPP Started (ddial mode).
Jan 22 21:25:28 ppp[3020]: Phase: bundle: Establish
Jan 22 21:25:28 ppp[3020]: Phase: deflink: closed -> opening
Jan 22 21:25:28 ppp[3020]: Warning: deflink: /dev/cuaU0.0: Bad file descriptor
Jan 22 21:25:28 ppp[3020]: Phase: deflink: Enter pause (30) for redialing.
Jan 22 21:25:58 ppp[3020]: Warning: deflink: /dev/cuaU0.0: Bad file descriptor
Just list them all (ls -l /dev/cuaU*
) before and after physical connection and compare the output.
In other words, notice the new device name which appears in /dev.
Or maybe I misunderstood your problem?..
ls -l /dev/cuaU*
crw-rw---- 1 uucp dialer 0x2d Jan 22 23:09 /dev/cuau2
crw-rw---- 1 uucp dialer 0x2e Jan 22 23:09 /dev/cuau2.init
crw-rw---- 1 uucp dialer 0x2f Jan 22 23:09 /dev/cuau2.lock
ls -l /dev/cuaU*
crw-rw---- 1 uucp dialer 0xa7 Jan 22 23:11 /dev/cuaU0.0
crw-rw---- 1 uucp dialer 0xa8 Jan 22 23:11 /dev/cuaU0.0.init
crw-rw---- 1 uucp dialer 0xa9 Jan 22 23:11 /dev/cuaU0.0.lock
crw-rw---- 1 uucp dialer 0xad Jan 22 23:11 /dev/cuaU0.1
crw-rw---- 1 uucp dialer 0xae Jan 22 23:11 /dev/cuaU0.1.init
crw-rw---- 1 uucp dialer 0xaf Jan 22 23:11 /dev/cuaU0.1.lock
crw-rw---- 1 uucp dialer 0x2d Jan 22 23:09 /dev/cuau2
crw-rw---- 1 uucp dialer 0x2e Jan 22 23:09 /dev/cuau2.init
crw-rw---- 1 uucp dialer 0x2f Jan 22 23:09 /dev/cuau2.lock
root@Test:~ # cu -l /dev/cuaU0.0
Connected
^RSSI:17
^HCSQ:"LTE",43,39,106,26
Manufacturer: huawei
Model: E3372
Revision: 21.180.01.00.00
IMEI: 866119027727057
+GCAP: +CGSM,+DS,+ES
OK
^RSSI:17
^HCSQ:"LTE",43,39,111,28
^RSSI:17
^HCSQ:"LTE",43,39,111,26
^RSSI:19
^HCSQ:"LTE",46,39,101,22
^RSSI:16
^HCSQ:"LTE",40,35,106,22
^RSSI:18
^HCSQ:"LTE",44,38,101,22
^RSSI:17
^HCSQ:"LTE",43,38,106,24
^RSSI:17
^HCSQ:"LTE",43,38,91,24
^RSSI:17
^HCSQ:"LTE",43,38,106,26
Warning: deflink: /dev/cuau1: Bad file descriptor