LTE Modem Huawei E3276 on TL-WR842NDv2 #28647 won't connect

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checho
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Joined: 27 Feb 2007
Posts: 527
Location: Bulgaria
PostPosted: Sat Jan 09, 2016 12:53    Post subject: LTE Modem Huawei E3276 on TL-WR842NDv2 #28647 won't connect Reply with quote
Hello everybody,

I am trying in several days to run a LTE modem E3276 on TL-WR842NDv2 #28647 but no success yet.

That's what I have discovered:

Before modeswitch (nvram set wan_proto=static)
Code:
root@DD-WRT:~# cat /sys/kernel/debug/usb/devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 1
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 3.10
S:  Manufacturer=Linux 3.10.94 ehci_hcd
S:  Product=Atheros AR91xx built-in EHCI controller
S:  SerialNumber=platform
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=12d1 ProdID=14fe Rev= 1.02
S:  Manufacturer=HUAWEI Technology
S:  Product=HUAWEI Mobile
C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=(none)
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=(none)
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms


After modeswitch (nvram set wan_proto=3g)
Code:
root@DD-WRT:/proc/bus/pci# cat /sys/kernel/debug/usb/devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 1
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 3.10
S:  Manufacturer=Linux 3.10.94 ehci_hcd
S:  Product=Atheros AR91xx built-in EHCI controller
S:  SerialNumber=platform
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  7 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=12d1 ProdID=1506 Rev= 1.02
S:  Manufacturer=HUAWEI Technology
S:  Product=HUAWEI Mobile
C:* #Ifs= 5 Cfg#= 1 Atr=80 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=10 Driver=option
E:  Ad=81(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=02 Prot=12 Driver=option
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 2 Alt= 0 #EPs= 1 Cls=ff(vend.) Sub=02 Prot=16 Driver=(none)
E:  Ad=84(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
I:  If#= 2 Alt= 1 #EPs= 3 Cls=ff(vend.) Sub=02 Prot=16 Driver=(none)
E:  Ad=84(I) Atr=03(Int.) MxPS=  64 Ivl=2ms
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=4ms
I:* If#= 3 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=(none)
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 4 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=(none)
E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms



I have a strong belief that everything on modeswitch or driver level is correct. Because comgt -d does show the modem connected to its network:

Code:
root@DD-WRT:/etc/comgt# comgt -d /dev/ttyUSB0
SIM ready
Waiting for Registration..(120 sec max)
Registered on Home network: MAX 4G LTE",7
Signal Quality:31,99


3gdata is always pointing to /dev/ttySB0, but I have also tried to point it to /dev/ttyUSB1 without any success. A comgt -d gives me back the status of the network either with -d /dev/ttyUSB0 or with /dev/ttyUSB1.

However when it's wan_proto=3g it does not connect. No ppp0 is created at all. I don't know how to diagnose further.

Code:
root@DD-WRT:~# uname -a
Linux DD-WRT 3.10.94 #14516 Sat Jan 2 03:27:05 CET 2016 mips DD-WRT

root@DD-WRT:~# lsmod
Module                  Size  Used by
option                 27008  0
qmi_wwan               10096  0
usbnet                 14896  1 qmi_wwan
cdc_wdm                 7440  1 qmi_wwan
usb_wwan                4032  1 option
usbserial              16672  2 option,usb_wwan
nf_nat_h323             4576  0
nf_conntrack_h323      34112  1 nf_nat_h323
ehci_hcd               32336  0
usbcore               103008  7 option,qmi_wwan,usbnet,cdc_wdm,usb_wwan,usbserial,ehci_hcd
usb_common              1008  1 usbcore
nls_base                4656  1 usbcore
ath9k                  76672  0
ath9k_common           27424  1 ath9k
ath9k_hw              329472  2 ath9k,ath9k_common
ath                    15040  3 ath9k,ath9k_common,ath9k_hw
mac80211              292224  2 ath9k,ath9k_hw
cfg80211              197072  4 ath9k,ath9k_common,ath,mac80211
compat                 12320  5 ath9k,ath9k_common,ath9k_hw,mac80211,cfg80211
ag71xx                 22416  0


Any help would be appreciated.
Thank you.
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LOM
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Joined: 28 Dec 2008
Posts: 7647
PostPosted: Sat Jan 09, 2016 13:18    Post subject: Reply with quote
r25760 is the last working build for most of ppp dialup dongles.
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checho
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Joined: 27 Feb 2007
Posts: 527
Location: Bulgaria
PostPosted: Sat Jan 09, 2016 13:27    Post subject: Reply with quote
Unfortunately yes. I just read the ticket on the trac and tried to flash that. It immediately worked... do you know if that's being worked on for a fix?
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LOM
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Joined: 28 Dec 2008
Posts: 7647
PostPosted: Sat Jan 09, 2016 13:50    Post subject: Reply with quote
checho wrote:
Unfortunately yes. I just read the ticket on the trac and tried to flash that. It immediately worked... do you know if that's being worked on for a fix?


No, not being worked on, Brainslayer is not interested in fixing it.
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GreyDoc
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Joined: 04 Jun 2015
Posts: 392
PostPosted: Sat Jan 09, 2016 14:39    Post subject: Reply with quote
LOM wrote:
checho wrote:
Unfortunately yes. I just read the ticket on the trac and tried to flash that. It immediately worked... do you know if that's being worked on for a fix?


No, not being worked on, Brainslayer is not interested in fixing it.

is this the mentioned ticket ? http://svn.dd-wrt.com/ticket/4745 why hasn't anybody reopened it for more than 4 months ? maybe Brainslayer doesn't know that this is a problem..
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LOM
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Joined: 28 Dec 2008
Posts: 7647
PostPosted: Sat Jan 09, 2016 18:44    Post subject: Reply with quote
GreyDoc wrote:
LOM wrote:
checho wrote:
Unfortunately yes. I just read the ticket on the trac and tried to flash that. It immediately worked... do you know if that's being worked on for a fix?


No, not being worked on, Brainslayer is not interested in fixing it.

is this the mentioned ticket ? http://svn.dd-wrt.com/ticket/4745 why hasn't anybody reopened it for more than 4 months ? maybe Brainslayer doesn't know that this is a problem..


He knows.
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GreyDoc
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Joined: 04 Jun 2015
Posts: 392
PostPosted: Sat Jan 09, 2016 18:49    Post subject: Reply with quote
LOM wrote:
GreyDoc wrote:
LOM wrote:
No, not being worked on, Brainslayer is not interested in fixing it.

is this the mentioned ticket ? http://svn.dd-wrt.com/ticket/4745 why hasn't anybody reopened it for more than 4 months ? maybe Brainslayer doesn't know that this is a problem..

He knows.

how do you know? the ticket has been dormant for more than 4 months, seems like everyone forgot about it (including the developers).. I've just reopened the ticket, hopefully someone lays another eye on this issue... it would be very useful to fix it.
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Slafko
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Joined: 02 Sep 2011
Posts: 32
Location: Radenci, Slovenia
PostPosted: Sun Jan 10, 2016 11:28    Post subject: Reply with quote
Hi.

I have the same modem (E3276), however it is connected to broadcom based E4200 v1 with r26866M firmware. It works without problems.
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jagster936
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Joined: 17 Apr 2018
Posts: 36
PostPosted: Wed Apr 18, 2018 14:26    Post subject: Reply with quote
So I'm trying to use USB dongle, is this still current? last working build as mentioned above?

Thx
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