LTE with Archer MR200 not working

Installing and Using OpenWrt
1

Hi
i have successfully installed openwrt 18.06.02 on my Archer M200 v1 Router (https://www.tp-link.com/de/products/details/cat-4691_Archer-MR200.html)
openwrt is up and running.

now i have absolutely no clue howto use the buildin lte-modem.
i installed all packages from here:
https://openwrt.org/docs/guide-user/network/wan/wwan/ltedongle
but i think there is something wrong with my modem.
if i connect to my router via ssh and then try to send AT commands with minicom to /dev/ttyUSB0 i get:
AT
OK
AT^SETPORT=?
ERROR
AT^SETPORT?
ERROR

if i want to add a new interface using QMI Cellular i have to set a modem device.
is this /dev/ttyUSB0? because i have no /dev/cdc-wdm0

can someone please give advice?

thanks

2

I did not need any extra packages when I flashed mine to an older version (then LEDE which reminds me - I must do an upgrade). All I needed to do was to insert a SIM and the internet was then available.

The modem interface (original TP-Link interface even after flashing OpenWrt) is on http://192.168.225.1/login.html. After flashing can you access that?
There are settings for the LTE connection there if you need them.

3

No i cannot connect or ping to http://192.168.225.1/login.html
if i view the log or my own interfaces i can see ther is a "usb0" interface with 192.168.225.165/24 ... but even there i cannot connect or ping ...
which interface is usb0 ?

EDIT1: I tryed now 17.01.06 and 18.06.02 ... both the same
is the "hidden webinterface" shown with netstat? because there is no service listening on port 80 with the ip 192.168.225.x ...
but i can see 192.168.225.165 is listening on port 53 ...
i dont get it

EDIT2: i got it. if i connected directly (without a switch between router and my laptop) and used dhcp instead of a static ip adress, i was able to connect to the hidden iwebinterface http://192.168.225.1/login.html

1 Like
4

I'm trying to use the same router with LTE. Then the summary if I understood well is only plug-in the SIM card? Or do I need to install and configure something more?

Thank you in advance.

5

You can try ModemManager + luci-proto-modemmanager if you don't feel like messing with AT commands on the modem; just need to include the right kernel modules for your modem.

6

I cannot install the ModemManager because it fill out the disk.

If you have commands for the ssh command line is not a problem to me.

Thank you!

7

EDIT:
Can you open it up and determine which modem it has inside? It seems to be a Cat4 LTE module. Anyway, if you do not have /dev/cdc-wdm0 you may be missing the kernel modules required. Try installing kmod-usb-net-qmi-wwan, kmod-usb-net-cdc-mbim, and kmod-usb-serial-option then rebooting and checking if you have /dev/cdc-wdm0.