STK (SIM Toolkit) AT Commands on EM8805/EM7305

IoT Modules MC/EM Series
1

This is the built-in 3G/4G modem in a Fujitsu Lifebook laptop. I’m told they should be the same as the MC series.

The Extended AT Commands document lists some AT!STK… commands;
AT!STKVER does display a version number, but the rest just seem to give ERROR:

Any ideas what I’m missing, or where I’m going wrong?

It doesn’t help that the documentation is pretty opaque;
eg, it talks about “unsolicited SIM commands”, but the 3GPP specs say that the SIM can’t do anything unsolicited. I presume they mean “unsolicited” in terms of the host-ME interface, rather than actually unsolicited from the SIM itself?

Even with that, it seems that they sometimes get “command” and “response” muddled-up…?

:confused:

2

Did you reset the modem after the

AT!CUSTOM="STKUIEN",2

command? I just tested on my MC7710 and it required a reset before the setting became active.

3

Yes, tried that - no difference:

:frowning:

4

Then I don’t know. FWIW this seems to work as documented on the MC7710:

!STKC: 25

AT!STKGC=25
!STKGC: 25,6,0,0,4,54454C454E4F52,0,0

1,4B6A0C702072696E6765746964,0,0,00

2,4F707073657474206F6720546A656E6573746572,0,0,00

3,41626E2E206F672044656B6E696E67,0,0,00

4,544C462D730C6B,0,0,00

5,42616E6B4944,0,0,00

6,50726F66664E657474,0,0,00


OK
AT!STKPD=?
AT!STKPD=<bitmask>

OK
AT!STKPD?
Profile config=0A0A00007FFFFF

OK

Note: No OEM password required except for the at!custom command

5

Hmm…

Do you also have that “STKEN” in the !CUSTOM list?
If so, what is it set to?
(it isn’t mentioned in the document).

If you do AT+CLAC, do you get the !STK… commands in the list?

Thanks,

Andy.

6

So the AT Commands are looking to be a dead-end.

:frowning:

Maybe QMI is the way to go - but where to start with that??

:confused:

7

Could very well be. I assume that’s how the communication between SWIs application and the Qualcomm chip/baseline firmware is implemented in the firmware anyway.

But I haven’t the faintest clue where to start doing STK commands with QMI. I know Marcel Holtmann mentioned having implemented some of it in oFono a long time ago. Ref:
lists.freedesktop.org/archives/l … 00080.html

You might want to check out the current QMI code in oFono, libqmi and the CodeAurora Gobi project and see if there is some STK example code there. But I wouldn’t be surprised if you’re on your own here… All these projects have naturally focused most on making basic services work, and STK is rarely requested.

8

No, I only have the “STKUIEN”,2 which is mentioned. And the STK commands, except STKVER, all fail without this setting, so I believe this is the enabling switch.

And there are no other “STK*” variables listed by “at!custom=?”

No. But I don’t get any of the Sierra specific commands, so that’s not surprising I.e, there are no commands with a ! prefix in the list.

9

OK, thanks - so that’s just inconclusive either way.

I note that the AT+CLAC response does include $QCSIMAPP:

But I can’t find any documentation of that

:frowning:

10

I’ll make that a separate thread: STK (SIM Toolkit); aka Card Application Toolkit (CAT) - QMI?