Hi,
I am using a LE910-EU V2 modem (from Telit). I have a SIM card with PIN
code activated.
With this setup, I never have CardIdentifier property in
org.ofono.SimManager properties. This is because Ofono fails to read ICCID.
In traces, I see all commands AT+CRSM sent during init (before PIN is
entered) failing. For example:
Aux: > AT+CRSM=192,28590\r
Aux: < \r\n+CME ERROR: 4\r\n
I assume this is an intended behavior from Telit as described in their
AT reference guide (page 124):
https://www.coniugo.de/tl_files/dateien/downloads/at/AT%20Commands%20LE910.pdf
The note says:
this command requires PIN authentication. However commands READ BINARY
and READ RECORD can be issued before PIN authentication and if the SIM
is blocked (after three failed PIN authentication attempts) to access
the contents of the Elementary Files.
192 is GET RESPONSE, READ BINARY is 176 and READ RECORD is 178
I tried to manage the modem without Ofono to verify that. Here is what I
tried:
AT+CPIN?
+CPIN: SIM PIN
OK
AT+CRSM=192,12258
ERROR
AT+CRSM=176,12258,0,0,255
+CRSM: 103,0
OK
AT+CRSM=176,12258,0,0,10
+CRSM: 144,0,98331002040320818103
OK
AT+CPIN=0000
OK
AT+CRSM=192,12258
+CRSM: 144,0,62178202412183022FE28A01058B032F06098002000A880110
OK
So I am able to read ICCID before entering PIN code but to do that, I
need to use AT+CRSM=176,12258,.... and not AT+CRSM=192,12258 as it is
done by Ofono.
I had a look at code in src/sim.c and src/simfs.c and it seems that any
read command will first call at driver level read_file_info and then
read_file_transparent.
I don't know how to fix that in Ofono code (if it should be fixed).
Should I call directly read_file_transparent in sim_initialize (instead
of ofono_sim_read) to get ICCID ? Should I modify ofono_sim_read to use
read_file_transparent directly (in some cases at least)?
Any ideas welcome,
Christophe Ronco
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