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How to Interface nRF9160 with external MCU for nb-IOT control using AT commands?

Hi,

I have this development board https://www.nordicsemi.com/Products/Development-hardware/nRF9160-DK . I would like to use development board as nb-IOT modem and other MCU to control it send data over nb-IOT modem using AT commands, it is possible to do this?

I have tested this board with nRF desktop software using 2G network and AT command.

As of now, I don't have nb-IOT sim card available to test, so not able to test.

Query targeting MCU interface :

1) Which RX, TX pin of nRF9160 would be used to control over MCU?

2) Which SDK should I use for AT command functionality?

3) what other changes are needed to work with nb-IOT network ?

please suggest if there is any reference example available for this purpose.

Any help will be appreciated.

Thanks & Regards,

Ashvin

0 user115324 over 4 years ago in reply to user73166

Hi Hakon

Thanks a lot for your help.

I am able to find nrf/application and built it successfully, but I am getting warnings more than 50. I don't know they are for.

I have flash the file into DK board and able to test AT commands on over USB with pc.

Now, for MCU purpose, need to changes those line but not able find this lines ,

"CONFIG_UART_0_NRF_HW_ASYNC_TIMER=2 ,

#CONFIG_SLM_CONNECT_UART_2=y,

#CONFIG_UART_2_NRF_HW_ASYNC_TIMER=2" in file.

Attaching the prj.conf file,

Thanks
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0 user73166 over 4 years ago in reply to user115324

My bad, it's in boards/nrf9160dk_nrf9160_ns.conf. This was changed recently.
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0 user115324 over 4 years ago in reply to user73166

Hi Hakon,

Thanks for your help and sorry for late reply.

I will look into your referral links and update you soon.
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0 user115324 over 4 years ago in reply to user73166

Hi Hakon,

Thanks for your support.

Now, I am able to connect with board with UART2 on pin P0.10, P0.11.

Is There any other pins are available for UART2 , expect P0.10, P0.11? If Yes, can you please share here?

can I use any other UART for same purpose?

Thanks & Regards,

Ashvin Makwana
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0 user73166 over 4 years ago in reply to user115324

Ashvin Makwana said:
If Yes, can you please share here?

You can see most GPIO pins that are not being used by the DK already. For more information you can look here.
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