Huawei ME909u-521 LTE mPCIe with RB953 issues

RouterOS Beginner Basics
1

Hi everyone,

I’m currently having issues trying to get a Huawei ME909u-521 LTE card working in a RB953. Previously, it was working in RouterOS 6.38, but I recently upgraded to ROS 6.42.1 (current stable).

I’m not 100% sure whether it was the upgrade that broke the functionality, since my device was switched off for a number of months and not used.
I’ve tried resetting the configuration back to defaults, and followed the instructions at https://wiki.mikrotik.com/wiki/Manual:Interface/LTE
The LTE card itself is detected, and a scan shows a number of available networks. It just cannot seem to connect to one.

I’ve also tried the following:

  • Installed the extra LTE package
  • Setup the PPP interface
  • Setup the DHCP client for LTE interface
  • Configured the APN correctly
  • Installed the LTE card in both mini PCIe slots
  • Used the SIM in my phone, to verify that there is service
  • I’ve also tried moving the routerboard around, and moved the antennas to get a clean signal

I’m at a loss at what is going wrong. Anyone had similar issues, or suggestions of what to try next?

2

The log repeatedly shows:

ppp-out1: initializing modem…
ppp-out1: dialing out…
lte1: sent AT+CSQ
lte1: rcvd +CSQ: 16,99

3

For anyone who has the same issue, I had to add the following modem init string to the LTE interface configuration:


AT^SYSCFGEX=“00”,3FFFFFFF,1,1,7FFFFFFFFFFFFFFF,

Thanks to the guide found here: https://bearmetal.eu/theden/lte-roaming-data-on-mikrotik-huawei/

After adding that, it seems to work fine.

4

Hi,

Do you have it working with ros 6.43 ?

I have conection, i can ping, resolve hostnames but no browsing or other traffic going on.


Thanks