LTE modems working with VIM3L+M2X EXTENSION

Gouwa · January 9, 2020, 3:34pm

Normally, it can support any model of LTE module, with it’s driver & ril library built-into the image.

We only add Quectel EM06 model at the moment.

Makro · June 23, 2020, 12:05pm

I have the new extension board and EM06-E on VIM3 pro. There is a green led flashing on the board, LTE module gets detected and network is correct, but no data/internet is available. Mobile phone with same card works fine. PIN code on sim has been deactivated. Also tried with Quectel EM05-E, same result. Changed antennas, same result (good reception). Activated PCI-e mode. Still same issue. Changed SIM for different network provider, still same. What could be the cause? Has this 4G module been proven to work? Running android VIM3_Pie_20200319.

Vladimir.v.v · June 23, 2020, 12:18pm

maybe he’s still in test mode.

Electr1 · June 23, 2020, 12:47pm

Yes, maybe it may have not been fully fledged to work yet, but we are unsure as not many people have talked about it, hence getting a glimpse of user experience has not been possible,

Could you also verify that your SIM is 4G, please note whether the Module is compatible with your country, there is Americas, European and Asia and pacific Band types.

Vladimir.v.v · June 23, 2020, 12:50pm

ok, does your module fit your region?
Example:
EM06-A-North America / Mexico
EM06-E - EMEA / APAC / Soli

Makro · June 23, 2020, 1:46pm

Yes, its, 4G. Module is compatible with region, its EM06-E and EM05-E that has been tested in Norway. EM05-E works with 4g and this simcard on Leez P710 sbc.

Makro · June 23, 2020, 1:47pm

Yes, its correct region. Also one of the modules do work fine on another SBC running android 9.0, Leez p710. Same sim card.

Electr1 · June 23, 2020, 2:19pm

Ok then it might be a firmware problem, but consult with @Terry about it.

Terry · June 28, 2020, 4:38am

You can try to flash the ubuntu rom and have a test.

VIM3_Ubuntu-gnome-focal_Linux-4.9_arm64_EMMC_V0.9-20200530

Makro · June 28, 2020, 11:25am

Thanks I will test. Simcard is Norwegian and location is Norway. Teleoperator is telenor, Module used is em06-e

Makro · August 27, 2020, 8:06am

We got the 4G to work. But only with a few sim cards. I will try Ubuntu to see that there are no hardware issues, and that android build works as it should.

Makro · August 27, 2020, 8:26pm

LTE works stable on the ubuntu rom, so the hardware and sim card should be fine. How can we make it work better on android? In ubuntu I have all these options to choose APN and other mobile data settings, not so in android , there the options are greyed out in the mobile settings menu.

Terry · August 28, 2020, 1:26am

You can flash the new android rom and have a try. Thanks!

Makro · August 28, 2020, 11:17am

I flashed the newest ROM several times, clean wiped EMMC several times, tested multiple SIM cards. Tested Ubuntu.

My conclusion:

4G works fine in Ubuntu.
I am not able to select what mobile network to connect to in Android. Deselecting “Automatically select network” under advanced pane in mobile settings reverts me back to the main menu. Network in Ubuntu is correct, in my case “Telenor.smart”, in Android it states “Telenor Telenor” with the same sim card. I have no way to set another network manually.
3.4G works with some sim cards in android. Therefore I believe it is a mobile network configuration issue.

I believe something is missing for the 4G to work properly in your latest android build.

Terry · August 28, 2020, 12:46pm

Which operator does your SIM card belong to?

Makro · August 28, 2020, 2:41pm

Telenor. I believe telenor.smart is the correct APN in this case

Terry · August 29, 2020, 2:38am

I need you to provide more logs for me following below steps.

# adb shell

# su

# mkdir /data/quectel_debug_log

# reboot

# adb root

# adb remount

# adb pull /data/quectel_debug_log/ .

And provide the three log files. Thanks!

<1> xxx_logcat.txt

<2> xxx_radio.txt

<3> xxx_dmesg_mainLoop.txt

Makro · August 31, 2020, 11:31am

Thank you, I will look into it and come back with the logs.

Makro · September 1, 2020, 10:02am

Anyone that can guide me in the world of minicom? Terry recommended to try “change the usbnet mode to 0 on ubuntu system, then update the android system” following this guide: https://docs.khadas.com/vim3/HowToUseLTEModule.html

But after starting minicom it just goes in a “listening” loop or similar, I cant execute any commands:

khadas@Khadas:~$ sudo minicom -D /dev/ttyUSB2

Welcome to minicom 2.7.1

OPTIONS: I18n
Compiled on Dec 23 2019, 02:06:26.
Port /dev/ttyUSB2, 09:01:25

Press CTRL-A Z for help on special keys

+EMM ERROR: 1,17

+CREG: 1,“55F1”,“DCF317”,2

+CIEV: 6,0

+CGREG: 2

+CGEV: NW DETACH

+CIEV: 6,1

+CGREG: 1,“55F1”,“DCF317”,2

+CREG: 1,“55F1”,“DCCC24”,2

+EMM ERROR: 1,17

+CREG: 1,“55F1”,“DCF317”,2

+CIEV: 6,0

+CGREG: 2

+CGEV: NW DETACH

+CIEV: 6,1

+CGREG: 1,“55F1”,“DCF317”,2

+CREG: 1,“55F1”,“DCCC24”,2

+EMM ERROR: 1,17

+CREG: 1,“55F1”,“DCF317”,2

+CIEV: 6,0

+CGREG: 2

+CGEV: NW DETACH

+CIEV: 6,1

+CGREG: 1,“55F1”,“DCF317”,2

+CREG: 1,“55F1”,“DCCC24”,2

+EMM ERROR: 1,17

+CIEV: 6,0

+CGREG: 2

+CGEV: NW DETACH

+CIEV: 6,1

+CGREG: 1,“55F1”,“DCCC24”,2

+EMM ERROR: 1,17

+CREG: 1,“55F1”,“DCF317”,2

+CIEV: 6,0

+CGREG: 2

+CGEV: NW DETACH

+CIEV: 6,1

+CGREG: 1,“55F1”,“DCF317”,2

+CREG: 1,“55F1”,“DCCC24”,2

+EMM ERROR: 1,17

+CREG: 1,“55F1”,“DCF317”,2

+CIEV: 6,0

+CGREG: 2

+CGEV: NW DETACH

+CIEV: 6,1

+CGREG: 1,“55F1”,“DCF317”,2

+CREG: 1,“55F1”,“DCCC24”,2

+EMM ERROR: 1,17

+CIEV: 6,0

+CGREG: 2

+CGEV: NW DETACH

+CIEV: 6,1

+CGREG: 1,“55F1”,“DCCC24”,2

+CREG: 1,“55F1”,“DCF317”,2

+CREG: 1,“55F1”,“DCCC24”,2

Makro · September 1, 2020, 10:41am

Typed in the command without any visual characters showing, hit enter and got the answer OK. Guess its OK then

Edit: @Terry Looks like it worked setting the usbnet mode to 0 on ubuntu system and flashing android again. Thanks for your help!