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not getting 1.8 volt in "SIM_1V8" pin

Balamurugan
we have designed a board using Nrf9160 IC and we have issue with SIM module. we not getting 1.8 volt in "SIM_1V8" pin. when running mqtt sample program we are getting
"***** Booting Zephyr OS v1.14.99-ncs1-581-g98c2d76ddd29 *****
The MQTT simple sample started
LTE Link Connecting ...
LTE Link Connected!
ERROR: getaddrinfo failed 22
ERROR: mqtt_connect -47.
Actually sim is not inserted. and also inserting sim does not  make any difference. In dev board it is 1.8 volt in "SIM_1V8" and in our board its 0 volt.
In dev board for "AT%XSIM?" returning
AT%XSIM?
%XSIM: 1
OK
AT+CPIN?
+CPIN: READY
OK
AT+CPINR="SIM PIN"
+CPINR: "SIM PIN",3
OK
AT+CIMI
204080813510834
In our board for "AT%XSIM?" returning:
%XSIM: 0
OK
Pleas help us to resolve the issue.
Our schematic is attached.
Parents
  • 0

    Hi,

    Is the sim-card inserted the correct way? Some sim card sockets allows the card to be inserted both ways, but only one way will work.

    Note that public MQTT brokers might be unstable. If you experience problems connecting to the MQTT broker, try switching to another broker by changing the value of the MQTT_BROKER_HOSTNAME configuration option (prj.conf). E.g. 

    CONFIG_MQTT_BROKER_HOSTNAME="test.mosquitto.org"

    You might want to test the at_client sample, and see if you are able to connect to the network using that sample also.

  • 0 in reply to Sigurd

    Thanks for reply.

    Board had assembly issue with "SIM_1V8" pin and IC re-flow solved it.Getting 1.8 volt in sim slot and SIM status is ok.

    Between dev board and custom board we see diffidence in "Model identifier".

    nRF9160 Dev board:

    AT+CGMM
    nRF9160-SICA
    OK

    Our Board with nRF9160 IC:

    AT+CGMM

    nRF9120

    OK

    Please let us know is this expected.?

  • +1 in reply to Balamurugan

    Hi,

    Balamurugan said:
    Board had assembly issue with "SIM_1V8" pin and IC re-flow solved it.Getting 1.8 volt in sim slot and SIM status is ok.

    Great!

    Balamurugan said:
    Please let us know is this expected.?

    Yes, it's expected for some of the older versions of the modem firmware. If you update to the latest modem fw(0.7.0-29.alpha as of today), it should also output nRF9160-SICA. 

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