TC63i 02.004 problem with SIM card | Telit Cinterion IoT Developer Community
May 17, 2019 - 2:09pm, 2373 views
Hello,
We have been using the TC63i module for years in our products, but now one of our customers is reporting a problem whe using private SIM cards from Movistar.
We have run tests and we have seen that it happens with the 02.004 revision of the software of them module, but the SIM works OK with 01.100 revision modules (we have seen that there is no problem with the TC65i module revision 02.004 either). The failure is that the modem seem to turn off by itself, as we detect that VEXT goes low.
When we made the development the only available revision was 01.100, so we only have the documentation for that one, even though we have devices deployed with both of them, as we have bought modules in different occasions and from different providers through the years.
The problem is that we can not find any documentation of the TC63i online, nor the revisions history, so we do not know what changes between them or if there is any reported bug. Could anyone provide me the AT commands manual and the hardware dev. guide of the 02.004 version and, in case it exists, the revisions history and bugs reports?
And, has anyone experienced this problem using this module?
Thanks in advance.
Sergio Hernando
Hello,
These modules are quite old and they are no longer developed. Please check the detailed firmware version for all firmware/hardware variants you have mentioned with 'ATI1' command. Maybe there are differences or an update is possible. I should also be able to find some documents then.
I could imagine that some incompatibility might happen with some new specific SIM card. Did you catch any output from the module when it switches off?
Best regards,
Bartłomiej
Hello,
The answer to the ATI1 command of the modems that fail is:
Cinterion
TC63i
REVISION 02.004
A-REVISION 01.000.15
The answer of the modems that do work with the SIM cards is:
Cinterion
TC63i
REVISION 01.100
A-REVISION 01
The module does not output anything before switch off, I just receive the ^SYSTART and after a feew seconds it switches off...
Regards,
Hello,
I have sent you the documents for REVISION 02.004. But I don't think that thre is an answer for this problem inside. Is there many devices failing or only one? Is it working normally with other SIM cards?
Regards,
Bartłomiej
Hello,
I received the documentation, thanks a lot. As you say, nothing in it gives any light on the issue I am seeing...
All the devices of this customer that use this private APN SIM cards are failling. I have reproduced it in my office as well with a TC63i 02.004 versino modem, so I guess it is a general incompatibility between that firmware version of the modem and those SIM cards.
Regards,
Hello,
It looks like there's some incompatibility.
In case of the general electrical communication problem between the SIM and module the SIM interface should be switched off. This is probably not the case here.
You could trace the SIM interface and compare the communication between modules or SIM cards. Maybe your application is using SIM Application Toolkit (SAT) commands. But anyway the problem is that this module is no longer developed and there are no more updates. Maybe there's some applet on the SIM that communicates with the module in a way that is not supported. Is it happening at the same time always - what is the module doing? Any logs? Anyway it is now hard to say based on the information we have why the module reboots (generally it should only happen in a critical situations) and how it is related to this SIM card and if there can be other factors (related to hardware design for example) that might contribute to this situation.
Regards,
Bartłomiej