SIM card related Projects » SIMtrace 2

Hello,

We have an Ubuntu 20.04 LTS machine that we have set up along with a SIMtrace2 tool updated with the latest firmware.

Once we start a trace, we can capture the trace in Wireshark as well as in the terminal, but in both cases, after a few hundred packets, the data reports as malformed.

Our SIM application requests modem status every 28 seconds, and so there is a good pattern to follow in the trace. The SIM application itself is behaving correctly, and counting these status commands as it should, but the output is just no good. Perhaps the board is running out of memory?

Here is the output from the terminal around when the problem starts:
TPDU: 80 f2 00 00 00 6c 2f
TPDU: 80 f2 00 00 2f 62 2d 82 02 78 21 83 02 7f f0 84 10 a0 00 00 00 87 10 02 ff 34 ff 07 89 31 2e 30 ff 8a 01 05 8b 03 2f 06 1e c6 09 90 01 40 83 01 01 83 01 81 90 00
TPDU: 80 f2 00 00 00 6c 2f
TPDU: 80 f2 00 00 2f 62 2d 82 02 78 21 83 02 7f f0 84 10 a0 00 00 00 87 10 02 ff 34 ff 07 89 31 2e 30 ff 8a 01 05 8b 03 2f 06 1e c6 09 90 01 40 83 01 01 83 01 81 90 00
TPDU: 80 f2 00 00 00 6c 2f
TPDU: 80 f2 00 00 2f 62 2d 82 02 78 21 83 02 7f f0 84 10 a0 00 00 00 87 10 02 ff 34 ff 07 89 31 2e 30 ff 8a 01 05 8b 03 2f 06 1e c6 09 90 01 40 83 01 01 83 01 81 90 00
Card state change: reset de-asserted
Card state change: reset de-asserted
ATR (malformed): 80
ATR (malformed): 6c
ATR (malformed): f2
ATR (malformed): 07
ATR (malformed): 80
ATR (malformed): 00
ATR (malformed): 80
ATR (malformed): 03
ATR (malformed): 91
ATR (malformed): 00
ATR (malformed): 62
ATR (malformed): 80
ATR (malformed): 01
ATR (malformed): 91
ATR (malformed): 80
ATR (malformed): 38
ATR (malformed): 00
ATR (malformed): 80
ATR (malformed): 01
ATR (malformed): 90
ATR (malformed): 80
ATR (malformed): 0e
ATR (malformed): 91
ATR (malformed): 80
ATR (malformed): 80
ATR (malformed): 03
ATR (malformed): 95
ATR (malformed): 45
ATR (malformed): 91
ATR (malformed): 00
ATR (malformed): 31
ATR (checksum error): 30 f3 f3 f3 53 53 63 73 f3 73 f3 9d
TPDU (malformed): 9d
TPDU (malformed): 9d
TPDU (malformed): 9d
TPDU (malformed): 9d e3 63 f3 f3
TPDU (malformed): f3 f3 73 f3 f3
TPDU (malformed): b3 f3 73 f3 73
TPDU (malformed): 33 f3 73 d3 f3
PPS (checksum error): ff fe d7 ff ff 0f
TPDU (malformed): d7 7f 3f 7f 3d bf bf be 7e 3f 7f ff 13 7f 00 76 37 fe b7 ff ff 37 b7 f4 77 7f 3f 7f 3d 7f bf bf 7e 7b 93 9f d7 3f 3f ff 7f 7f f6 ff fe d7 ff ff 0f d7 7f 3f 7f 3d 7f bf bf be 7e 3f 7f ff 13 7f 00 76
TPDU (malformed): fe b7 ff ff b9 f4 f9 7f 3f 7f 3d 7f bf bf 7e 7b 93 55 97 3f 3f ff f5 4a cd 1a c4 b4 08 cd 01 25 51 79 84 0e 1b 57 ea 2b ac 8e 48 22 67 17 97 3e fc 57 e3 45 40 cb 6b fa b1 be a8 d5 7a 61 64 81 7f 38 af 48 fc d3 d1 3b 27 63 34 19 49 e9 26 7b 74 de ef 8b 1f 8a 09 08 0f 10 59 e7 d5 73 2b c6 e2 9a be cd 76 c2 17 f6 ff fe d7 ff ff 0f d7 7f 3f 7f 3d 7f bf bf be 7e 3f 7f ff 13 7f 00 f6 ff fe bc ff ff f7 bc 94 8f 67 7f 6f bf bf be 7e e3 bf 7e ff 13 7f 9f 76 8f fe b7 ff ff 8f b7 f4 cf 7f 3f 7f bd ff bf bf 7e 7b 13 7f 9f f6 ff fe d7 ff ff 17 d7 7f 3f 7f bd ff bf bf be 7e 3f
PPS (checksum error): ff 93 9f d7
TPDU (malformed): 3f 3f ff 7f 7f


Wireshark shows the same thing at the time. (attached)

I dont have anything setup to take from the debug 2.5mm jack, but I will look into that urgently.