Skyus DS LTE Modem (Sierra Wireless MC7354 chipset)

[bmorgenthaler]

I'm trying to get a Skyus DS external USB LTE modem working with OPNsense 22.7.7 and having some difficulties. I'm in the US and using a Ting X3 SIM with Flex Data, this setup worked with the replaced Meraki stack (hence why I have the Skyus). According to pfSense the MC7354 shipset is supported but it isn't explicitly listed on the OPNsense documents.

I can get it detected and configured but it never gets an IP address after making a connection and it is terminated. Looking through some posts it appears to be an APN issue but I've tried the two APNs that Ting lists - https://help.ting.com/hc/en-us/articles/205428698-APN-setup-guide.  I'm wondering if it is the extra bits beside the APN string that I can't figure out how to configure.

Also bug report (I'll fill out): The information you save under Point-to-point on the device such as Description, Init String, etc. do not stay saved after enabling the associated interface. They are removed and just the phone number and APN stay around.

[tiermutter]

What is the output from point to point log?
For me with Mc7304 I had most success using init string "!greset".

[bmorgenthaler]

So that command complete reboots the modem, disconnects it from USB and reattaches it.

I'm trying with the init string mentioned in the OPNsense documentation; '&F0E1Q0 +CMEE=2' and the errors I'm seeing matches up with the No IP Address section of this troubleshooting document for pfSence - https://teklager.se/en/knowledge-base/pfsense-lte-troubleshooting/

My logs look like:

Code Select Expand


2022-11-07T22:28:10 Informational ppp [opt10_link0] CHAT: +CGDCONT=1,"IP","wireless.dish.com"
2022-11-07T22:28:10 Informational ppp [opt10_link0] CHAT: Detected Sierra Wireless Modem.
2022-11-07T22:28:10 Informational ppp [opt10_link0] CHAT: Dialing server at *99#...
2022-11-07T22:28:10 Informational ppp [opt10_link0] CHAT: ATDT*99#
2022-11-07T22:28:10 Informational ppp [opt10_link0] CHAT: Connected at 100000000.
2022-11-07T22:28:10 Informational ppp [opt10_link0] MODEM: chat script succeeded
2022-11-07T22:28:10 Informational ppp [opt10_link0] Link: UP event
2022-11-07T22:28:10 Informational ppp [opt10_link0] LCP: Up event
2022-11-07T22:28:10 Informational ppp [opt10_link0] LCP: state change Starting --> Req-Sent
2022-11-07T22:28:10 Informational ppp [opt10_link0] LCP: SendConfigReq #1


and repeats the LCP events until it cancels with never receiving an IP address:

Code Select Expand


2022-11-07T22:28:35 Informational ppp [opt10_link0] LCP: LayerStart
2022-11-07T22:28:35 Informational ppp 0x10826e1 <???> at /usr/local/sbin/mpd5
2022-11-07T22:28:35 Informational ppp 0x1060645 <???> at /usr/local/sbin/mpd5
2022-11-07T22:28:35 Informational ppp 0x10b0fb0 <???> at /usr/local/sbin/mpd5
2022-11-07T22:28:35 Informational ppp 0x10ae3b1 <???> at /usr/local/sbin/mpd5
2022-11-07T22:28:35 Informational ppp 0x1096a79 <???> at /usr/local/sbin/mpd5
2022-11-07T22:28:35 Informational ppp 0x10c40d5 <???> at /usr/local/sbin/mpd5
2022-11-07T22:28:35 Informational ppp 0x10c3a58 <???> at /usr/local/sbin/mpd5
2022-11-07T22:28:35 Informational ppp ASSERT "!m->opened" failed: file "modem.c", line 215
2022-11-07T22:28:35 Informational ppp fatal error, exiting


[tiermutter]

Have You removed the PIN from SIM card?

[bmorgenthaler]

Yes the PIN has been removed.

[tiermutter]

I never had such error, maybe you sould locate the file "modem.c" and see what is in line 215. Myabe there is a hint for your problem.

Connecting to the modem by "cu" gives a OK?