Wireless Joint

Posted: **Wed Nov 28, 2018 2:58 pm**

Hello , I appreciate any eyes on this issue.

I've installed the proper GoldenOrb based on all posted tutorials I've read through...I've read through all the troubleshooting issues and nothing seems to resolve my problem. Basically I've scoured other posts about connection issues and nothing is helping either.

I have an MC4755 modem installed (checked pigtails) confirmed :

Screen Shot 2018-11-28 at 12.50.01 PM.png

I have Modem Connection Monitoring set properly (Enabled w/ modem reconnect) but it continually states "MODEM PRESENT/NOT CONNECTED" on the Modem Miscellaneous screen.

Basically I've followed every tutorial until the AT Command section, where I keep getting the same error: "Can't open device /dev/ttyUSB1."

Screen Shot 2018-11-28 at 12.52.01 PM.png

I have connected the antenna properly too, but since I can't even get AT Commands to work, it's hard for me to understand what the issue is. I have my SIM installed how I think to be correct, and the Rooter page doesn't seem to notice the SIM anywhere...is this what is causing the AT command issue? I have rebooted and reconnected my modem several times and it always shows as connected, so I don't believe it can be the USB/Ethernet device I'm using. Many thanks in advance.

Posted: **Wed Nov 28, 2018 3:08 pm**

a few questions come to mind.

1. has this ever worked?

2. is the modem internal to this router? I'm not familiar with it, but I would check the cables on it.

3. if you login to the router, and run `dmesg | grep -i usb` do you see the modem listed?

Posted: **Wed Nov 28, 2018 4:05 pm**

swwifty wrote: ↑Wed Nov 28, 2018 3:08 pm a few questions come to mind.

1. has this ever worked?

2. is the modem internal to this router? I'm not familiar with it, but I would check the cables on it.

3. if you login to the router, and run `dmesg | grep -i usb` do you see the modem listed?

1. no (this is my first time setting up this router)
2. no, I installed it myself and just double checked the pigtail connection
3. I'm on a mac so cant specifically run that, but it shows the modem under Modem -> Network Status

Posted: **Wed Nov 28, 2018 4:09 pm**

thebranman wrote: ↑Wed Nov 28, 2018 4:05 pm 1. no (this is my first time setting up this router)
2. no, I installed it myself and just double checked the pigtail connection
3. I'm on a mac so cant specifically run that, but it shows the modem under Modem -> Network Status

Are you sure there's towers within your location?

I've seen this kind of behavior when there's no signal to connect to.

oh, also, I meant to run the dmesg command on the router. Can you ssh into it and run that command?

Posted: **Wed Nov 28, 2018 4:12 pm**

Not sure if this means anything to anyone but here is the text in my Device Info under Modem > Debug Info:

T: Bus=02 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=5000 MxCh= 1
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 3.00 Cls=09(hub ) Sub=00 Prot=03 MxPS= 9 #Cfgs= 1
P: Vendor=1d6b ProdID=0003 Rev= 4.04
S: Manufacturer=Linux 4.4.92 xhci-hcd
S: Product=xHCI Host Controller
S: SerialNumber=1e1c0000.xhci
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=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 2
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= 4.04
S: Manufacturer=Linux 4.4.92 xhci-hcd
S: Product=xHCI Host Controller
S: SerialNumber=1e1c0000.xhci
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=01 Cnt=01 Dev#= 8 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=1199 ProdID=9070 Rev= 0.00
S: Manufacturer=Sierra Wireless, Incorporated
S: Product=MC7455
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr= 2mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=qcserial
E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

Posted: **Wed Nov 28, 2018 4:13 pm**

looks like its not an issue (as far as I can tell with seeing the modem hardware wise) I'd suspect its a service issue?

What carrier are you using?

Posted: **Wed Nov 28, 2018 4:17 pm**

swwifty wrote: ↑Wed Nov 28, 2018 4:09 pm Are you sure there's towers within your location?

I've seen this kind of behavior when there's no signal to connect to.

thanks for your reply

Yes, there are towers within a few miles and I have some dual 15db omni hooked up. This just seems like a more basic connectivity problem since the Modem is Present/Not Connected in the Modem>Miscellaneous section of the router web interface. But what do I know...this is my first time setting something up like this before. I do feel that I've exhausted all reading material on this router and nothing seems to work.

Posted: **Wed Nov 28, 2018 4:20 pm**

swwifty wrote: ↑Wed Nov 28, 2018 4:13 pm
What carrier are you using?

I have AT&T and I used my correct APN in the Modem>Connection Info section. The warnings I'm getting in the Modem>Misc section re: connectivity keep saying "Modem Present/Not Connected" and then I get a USB error when inputting an AT Command in the same section: "Can't open device /dev/ttyUSB1."

Posted: **Wed Nov 28, 2018 5:09 pm**

thebranman wrote: ↑Wed Nov 28, 2018 4:20 pm I have AT&T and I used my correct APN in the Modem>Connection Info section. The warnings I'm getting in the Modem>Misc section re: connectivity keep saying "Modem Present/Not Connected" and then I get a USB error when inputting an AT Command in the same section: "Can't open device /dev/ttyUSB1."

I've seen that when it can't find signal, but typically you can still issue AT commands.

Are you using the broadband APN? are you sure there is no whitespace at the end of where you typed it in?

Also what antennas are you using? Never heard of any 15dbi omni antennas.

Posted: **Wed Nov 28, 2018 6:15 pm**

swwifty wrote: ↑Wed Nov 28, 2018 5:09 pm I've seen that when it can't find signal, but typically you can still issue AT commands.

Are you using the broadband APN? are you sure there is no whitespace at the end of where you typed it in?

Also what antennas are you using? Never heard of any 15dbi omni antennas.

Hi again...confirmed, there is no white space.

Also, apologies, did not mean omni...directional!

Posted: **Wed Nov 28, 2018 6:28 pm**

so you can't issue any at! commands via the miscellaneous page in GoldenOrb?

I was thinking it's possible your modem is in the wrong mode (MBIM vs QMI)

Screen Shot 2018-11-28 at 7.26.45 PM.png

Taken from: https://wirelessjoint.com/viewtopic.php?f=16 ... =mbim#p107

Posted: **Wed Nov 28, 2018 6:29 pm**

thebranman wrote: ↑Wed Nov 28, 2018 6:15 pm Hi again...confirmed, there is no white space.

Also, apologies, did not mean omni...directional!

could you try too with the factory antennas that came with the router? Typically they come with small omni directional antennas, that might be worth trying out, to rule out any cabling/antenna issues.

Posted: **Wed Nov 28, 2018 6:36 pm**

swwifty wrote: ↑Wed Nov 28, 2018 6:29 pm could you try too with the factory antennas that came with the router? Typically they come with small omni directional antennas, that might be worth trying out, to rule out any cabling/antenna issues.

actually the WG3526 doesnt come with the small antenna...I dont know if it's possible, but could I take off either the 2.4 or 5 ghz antenna and substitute those for testing purposes?

thanks for all your responses

Posted: **Wed Nov 28, 2018 6:40 pm**

thebranman wrote: ↑Wed Nov 28, 2018 6:36 pm actually the WG3526 doesnt come with the small antenna...I dont know if it's possible, but could I take off either the 2.4 or 5 ghz antenna and substitute those for testing purposes?

thanks for all your responses

you could for testing purposes if they have the proper connector. just make sure you don't confuse sma and rp-sma, as they look very similar but aren't compatible.

I would look into make sure your modem is in mbim mode as expected. The behavior you are describing sounds like that is the issue, and I recall when I first setup my MC7455, I had a similar issue.

Posted: **Wed Nov 28, 2018 8:29 pm**

swwifty wrote: ↑Wed Nov 28, 2018 6:40 pm The behavior you are describing sounds like that is the issue, and I recall when I first setup my MC7455, I had a similar issue.

Thanks! Ill review this MBIM mode tomorrow after I have refilled my patience meter a little bit with a good night sleep

Posted: **Thu Nov 29, 2018 3:09 pm**

swwifty wrote: ↑Wed Nov 28, 2018 6:40 pm
I would look into make sure your modem is in mbim mode as expected.

Hello again,

I followed that MBIM instruction you linked to and can't get very far (as I don't speak Russian..it also won't let me copy/paste the text in the warning/error

) at all. I installed all the appropriate drivers from Sierra and nothing is still showing up. The only thing that shows up in the Huawei Terminal is COM1 and that doesn't do anything for me.

Screen Shot 2018-11-29 at 12.55.36 PM.png

When I go into Devices Manager, there is nothing under COM when the router is plugged in via USB. For some reason, the router shows up as an E:/ Drive...

Screen Shot 2018-11-29 at 12.59.29 PM.png

Did you run into this issue when setting up your MC4755?

Posted: **Thu Nov 29, 2018 3:14 pm**

You're using windows to try and send AT commands to the modem? I configured mine to use MBIM mode via the "Misc" option under "Modem" in Golden Orb. From there, you'll see an option to send AT commands. You had a screenshot of it earlier in this thread. That's how I did it. I suppose you could do it, but plugging it into a different computer, but I did it that way.

Posted: **Thu Nov 29, 2018 3:49 pm**

swwifty wrote: ↑Thu Nov 29, 2018 3:14 pm You're using windows to try and send AT commands to the modem? I configured mine to use MBIM mode via the "Misc" option under "Modem" in Golden Orb. From there, you'll see an option to send AT commands. You had a screenshot of it earlier in this thread. That's how I did it. I suppose you could do it, but plugging it into a different computer, but I did it that way.

Yeah, I've been trying to do everything possible in Golden Orb but was referred to turn on MBIM mode https://wirelessjoint.com/viewtopic.php?f=16 ... =mbim#p107 from the link you supplied.

There is no prompt to 'turn on' MBIM mode via golden orb, at least on my end

Screen Shot 2018-11-29 at 1.46.46 PM.png

Posted: **Thu Nov 29, 2018 4:16 pm**

You need to issue the AT command to put the modem in MBIM mode where it says "AT-Command:"

First you have to enter the security code, and hit send command as describe in the other tutorials, then submit the command to put it in MBIM mode.

Posted: **Thu Nov 29, 2018 4:23 pm**

swwifty wrote: ↑Thu Nov 29, 2018 4:16 pm You need to issue the AT command to put the modem in MBIM mode where it says "AT-Command:"

First you have to enter the security code, and hit send command as describe in the other tutorials, then submit the command to put it in MBIM mode.

Yes, I realize that...as my first post stated, I'm not even getting past basic connection roadblocks. If I try to initiate any AT Commands, I am met with "Can't open device /dev/ttyUSB1."

What security code are you speaking of? I haven't seen that mentioned anywhere before. Thank you

Posted: **Thu Nov 29, 2018 7:10 pm**

thebranman wrote: ↑Thu Nov 29, 2018 4:23 pm Yes, I realize that...as my first post stated, I'm not even getting past basic connection roadblocks. If I try to initiate any AT Commands, I am met with "Can't open device /dev/ttyUSB1."

What security code are you speaking of? I haven't seen that mentioned anywhere before. Thank you

I was referring to the AT command 'AT!ENTERCND="A710"' which enables advanced commands, and is required to be entered before you can switch the modem out of QMI mode into MBIM.

Is it possible for you to try this modem attached to another computer? I know you shared a screenshot earlier of trying it, but I'm not super familiar with hooking up Sierra modems outside of Linux.

One other option is to see if you can select a different modem on the misc page in GoldenOrb. Can you hit next modem and see if it selects the proper one? I recall also having an issue like this in the past, where for some reason the OS saw two modems instead of just one, and only one worked.

Also, another option would be to try and reinstall GoldenOrb from scratch, or reset it to factory defaults, and see if that enables you to then issue AT commands. You should be able to issue AT commands, even if you aren't connected to any carrier.

Posted: **Thu Nov 29, 2018 7:46 pm**

swwifty wrote: ↑Thu Nov 29, 2018 7:10 pm I was referring to the AT command 'AT!ENTERCND="A710"' which enables advanced commands, and is required to be entered before you can switch the modem out of QMI mode into MBIM.

Also, another option would be to try and reinstall GoldenOrb from scratch, or reset it to factory defaults, and see if that enables you to then issue AT commands. You should be able to issue AT commands, even if you aren't connected to any carrier.

Hi again -

Yes, sadly have tried that AT Command you mentioned...nothing I input works and is always met with "Can't open device /dev/ttyUSB1". I reset the router and reinstalled from scratch twice now to no avail. It's confusing because it mentions that the modem is definitely there and points at it in the Rooter interface, but then I get USB errors (USB is related to my ethernet dongle, which works for everything else I've tried so I don't think it's malfunctioning) when I try to connect to it on the Modem>Misc page. I've tried shuffling the modem 1&2 and that didn't work either.

I'm about ready to give up on this..I've easily put 10+ hours into reading every tutorial i've come across, numerous attempts on every step etc.

thanks for assistance

Posted: **Thu Nov 29, 2018 7:49 pm**

thebranman wrote: ↑Thu Nov 29, 2018 7:46 pm Hi again -

Yes, sadly have tried that AT Command you mentioned...nothing I input works and is always met with "Can't open device /dev/ttyUSB1". I reset the router and reinstalled from scratch twice now to no avail. It's confusing because it mentions that the modem is definitely there and points at it in the Rooter interface, but then I get USB errors (USB is related to my ethernet dongle, which works for everything else I've tried so I don't think it's malfunctioning) when I try to connect to it on the Modem>Misc page. I've tried shuffling the modem 1&2 and that didn't work either.

I'm about ready to give up on this..I've easily put 10+ hours into reading every tutorial i've come across, numerous attempts on every step etc. thanks for assistance

It's possible the modem itself is defective, but I feel like something else is going on. It's tough to troubleshoot when I can't sit down in front of it.

Do you have another computer you could hook the modem up to, and see if you can issue AT commands to it?

Posted: **Thu Nov 29, 2018 9:07 pm**

swwifty wrote: ↑Thu Nov 29, 2018 7:49 pm It's possible the modem itself is defective, but I feel like something else is going on. It's tough to troubleshoot when I can't sit down in front of it.

Do you have another computer you could hook the modem up to, and see if you can issue AT commands to it?

I have tried on a Mac and on PC so far, I may have to give Linux a shot. I thought it might be the modem too, but it is being read by the Rooter interface, just can't connect for whatever reason. I do have a second modem card I can try tomorrow..if I am getting the same results, I wonder if it could be the router itself.

thanks again.

to be continued I suppose

Posted: **Fri Nov 30, 2018 6:21 am**

thebranman wrote: ↑Thu Nov 29, 2018 9:07 pm I have tried on a Mac and on PC so far, I may have to give Linux a shot. I thought it might be the modem too, but it is being read by the Rooter interface, just can't connect for whatever reason. I do have a second modem card I can try tomorrow..if I am getting the same results, I wonder if it could be the router itself.

thanks again.

to be continued I suppose

Good luck, and let me know what happens.

Regardless, don't give up, keep trying. You will figure out what the issue is, as long as you don't quit

Posted: **Fri Nov 30, 2018 1:37 pm**

Turn off connection monitoring to stop the modem from trying to reconnect. Then reboot the router then you will be able to issue commands.

Posted: **Fri Nov 30, 2018 2:17 pm**

RussWestrem wrote: ↑Fri Nov 30, 2018 1:37 pm Turn off connection monitoring to stop the modem from trying to reconnect. Then reboot the router then you will be able to issue commands.

excellent suggestion! I recall thebranman had mentioned that, but didn't put two and two together.

Once you do that, you should be able to put the modem MBIM mode, and get it to finally connect.

I personally wouldn't recommend using connection monitoring until you are using the connection all the time, and even then not make it to aggressive.

Posted: **Wed Dec 12, 2018 6:10 pm**

swwifty wrote: ↑Fri Nov 30, 2018 6:21 am Good luck, and let me know what happens.

Regardless, don't give up, keep trying. You will figure out what the issue is, as long as you don't quit

Hello once again...I've continued to try and have at least been successful in getting to MBIM mode. Not sure how or why, but it allows me to do AT Commands finally. I start out with at!entercnd="A710" before inputting the next command as well.

However, my initial results with at!gstatus? and at!lteinfo aren't promising. I also tried at+cgdcont=1,"IP”,”broadband” to no avail:

at!gstatus?
!GSTATUS:
Current Time: 346 Temperature: 29
Reset Counter: 3 Mode: LOW POWER MODE
OK
----
at!lteinfo
!LTEINFO:
Not Available
----
at+cgdcont=1,"IP”,”broadband”
ERROR
----
AT+CPMS="SM"
+CPMS: 0,30,0,30,0,30
OK
----
at+cgdcont=?
+CGDCONT: (1-24),"IP",,,(0-2),(0-4),(0-1),(0-1)
+CGDCONT: (1-24),"PPP",,,(0-2),(0-4),(0-1),(0-1)
+CGDCONT: (1-24),"IPV6",,,(0-2),(0-4),(0-1),(0-1)
+CGDCONT: (1-24),"IPV4V6",,,(0-2),(0-4),(0-1),(0-1)
OK

I can't really "read" this code yet since I am so new to it, but it seems like there isn't any signal at all. My connections are properly snug and nothing is loose. Can you make anything of it? I have an AT&T sim card, never been used and it is being read correctly by the router, so the SIM is not the issue.

I'm off to get a multimeter tomorrow to test my LMR400 cables and terminations, but I don't think there are any errors there as I've done crimping before and have correct tools.

Posted: **Wed Dec 12, 2018 6:19 pm**

Which firmware and what build version are you using?

Posted: **Wed Dec 12, 2018 6:34 pm**

JimHelms wrote: ↑Wed Dec 12, 2018 6:19 pm Which firmware and what build version are you using?

Hi Jim -

I installed from a tutorial you had posted:
Powered by LuCI openwrt-18.06 branch (git-18.210.69179-6df9a57) / GoldenOrb_2018-09-02

I used re-installed OEM Firmware then did the GoldenOrb reflash. Is this correct? Thanks for your help

Posted: **Wed Dec 12, 2018 7:16 pm**

Yes, give me a few minutes and I will work you up a game plan.

Posted: **Wed Dec 12, 2018 8:04 pm**

JimHelms wrote: ↑Wed Dec 12, 2018 7:16 pm Yes, give me a few minutes and I will work you up a game plan.

thank you sir! I was about to give up hope for the 2nd time

Posted: **Wed Dec 12, 2018 8:13 pm**

I find it sometimes best in these situations to start over.

1. Go to MODEM > CONNECTION PROFILE > CONNECTION MONITORING and DISABLE. SAVE & APPLY.

2. Remove your SIM Card.

3. Restore the MC7455 to OEM Status. Go to MODEM > MISCELLANEOUS > AT-COMMAND TERMINAL and enter the following commands:

Wireless Joint

WG3526 connection problems - no signal, AT!GSTATUS? fails

WG3526 connection problems - no signal, AT!GSTATUS? fails

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