Error when requesting IMSI number

[tuvarambre]

Hi!

I am programming my FiPy to send UDP packages over the NB-IoT network and therefore trying to get the IMSI number from the SIM card installed.
I am using AT commands in the REPL:

>>> from network import LTE
>>> lte = LTE()
>>> lte.send_at_cmd(“AT+CIMI”)
‘\r\nERROR\r\n’

I have tried changing to another SIM card, but remained unsuccessful in getting the IMSI.
Anyone who can help?

PS. The AT command to get the IMEI number works without difficulty.
>>> lte.send_at_cmd(“AT+CGSN”)
‘\r\n354346093528684\r\n\r\nOK\r\n’

[tuvarambre]

New update: I figured it out!

I used a sequence in the REPL that I find fixes almost anything, and after this it worked.

>>>from network import LTE
>>>lte = LTE()
>>>lte.deinit()
>>>lte.init()
>>>lte.attach()
>>>lte.isattached()
True
>>>lte.send_at_cmd(“AT+CIMI”)
‘\r\nxxxxxxxxxxxxxxx\r\n\r\nOK\r\n’

Hope this can be helpful for someone else as well. 🙂

[Pontus]

Glad it worked out and thanks for sharing! 🙂

I’ll add that it can also help to check that the SIM card is inserted and in the correct position whenever there is trouble with SIM related operations 😁

[Author]

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