not getting 1.8 volt in "SIM_1V8" pin

RE: not getting 1.8 volt in "SIM_1V8" pin

Balamurugan — Thu, 23 May 2019 15:59:10 GMT

Thanks. After modem firmware update it is returning "nRF9160-SICA" . Also mqtt sample program works similar as it works in dev board. i do not see false positive "LTE Link Connected!" message.

Thanks... Issues solved.

RE: not getting 1.8 volt in "SIM_1V8" pin

Sigurd — Thu, 23 May 2019 15:48:56 GMT

Hi,

[quote user="TW_Bala"]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.[/quote]

Great!

[quote user="TW_Bala"]Please let us know is this expected.?[/quote]

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.

RE: not getting 1.8 volt in "SIM_1V8" pin

Balamurugan — Thu, 23 May 2019 15:33:31 GMT

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

Please let us know is this expected.?

RE: not getting 1.8 volt in "SIM_1V8" pin

Sigurd — Thu, 23 May 2019 13:12:12 GMT

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.