Using Firmware Version 02.38.00.00 I CANNOT even enable the adapter. It’s stuck in low-power mode. And no matter what AT commands I send, or FCC Unlock using NetworkManager I do, it just won’t work. I even tried to disable FCC lock using EM7455, Deactivate Low-Power-Mode - #22 by fs1 but to no avail.
Using Firmware Version 02.33.03.00 I CAN successfully enable the adapter, but I cannot register to the network. I either get “Registration Failed” or simply non-specific error messages (“Connection attempt failed.”).
So for now I stick with Firmware Version 02.33.03.00. I can see something is happening, the Signal Strength % is around 20%-50% (better than 0% !), but apart from that not much is going on. The “POWER” and “WAN” LEDs in the USB adapter I am using stay permanently ON now, whereas with the newer firmware the WAN LED would always stay OFF !
I tried changing Authentication from None to CHAP to PAP/CHAP (both) but either way it won’t work.
I am located in Denmark and my provider is TDC.dk and according to the instructions, the APN should simply be “internet”. Not a lot of information available concerning PAP or CHAP or authentication overall.
But, as I said, Firmware Version 02.38.00.00 doesn’t work at all (cannot even enable the module even though FCC unlock etc was correctly set). So working with Firmware Version 02.33.03.00 .
ati3
Manufacturer: Sierra Wireless, Incorporated
Model: EM7455
Revision: SWI9X30C_02.33.03.00 r8209 CARMD-EV-FRMWR2 2019/08/28 2AT!F?
!IMPREF:
preferred fw version: 02.33.03.00
preferred carrier name: GENERIC
preferred config name: GENERIC_002.07AT!SELRAT?
!SELRAT: 00, Automatic
OK
AT!BAND?
Index, Name
00, All bands
OK
AT+cpin?
+CPIN: READY
OK
AT!uims?
!UIMS: 0
OK
AT+CGDCOT?
+CGDCONT: 1,"IPV4V6","bredband.oister.dk","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
OK
Which is weird because the APN set in OpenWRT & the APN set in the SIM card should be TDC.dk.
Don’t know why it’s stuck on bredband.oister.dk.
Using OpenWRT in QMI mode I could, for a short moment, get it to work with the Oister.dk SIM card (whose subscription was supposed to be paused - doesn’t make much sense).
But now I am using TDC.dk SIM card & OpenWRT configured using ModemManager to APN=internet (as instructed by TDC.dk).
So not sure what is going on here. Seems like one SIM card permanently set the APN & locked to it or what ?
I have big Poyting antennas outside of my house I planned to use, but cannot debug like that. Then I’d need to run like a 30m long USB cable (which I don’t think I have) …
Sure I can also setup a Raspberry PI near the Poynting antenna etc but I’m not to that point yet.
.
