Custom UART Interface

[konradin]

Hallo,

I am developing a custom board, based on Nordic Thingy:91. The custom board won´t support BLE, so the nRF52840 is not intgrated. But Communication with the nRF9160 chip over UART should be possible. Why UART0 and UART1 is is used by the nRF9160 on Thingy 91? Do i need both on my custom board or could I select one UART interface?

The software wich will run on the coustum board is a modification of the asset tracker app.

Kind regards,

Konradin

[Håkon Alseth]

Hi Konradin,

 

 

Why UART0 and UART1 is is used by the nRF9160 on Thingy 91? Do i need both on my custom board or could I select one UART interface?

Those UARTs can be used for your application, normally uart0 is debug prints and uart1 can be freely used.

Similar to the nRF9160-DK, we are trying to get modem tracing on uart1 to run on thingy:91 as well (this PR: https://github.com/NordicPlayground/fw-nrfconnect-nrf/pull/2058)

  

Do i need both on my custom board or could I select one UART interface?

That depends on your application. Do you need UART? Debug printing can also be done over RTT

 

Kind regards,

Håkon

[konradin]

It should be possible to do debug printing and send AT commands to the modem. Could this be done with one UART interfeace?

[Håkon Alseth]

Yes, that is possible if you enable the AT host in your project:

CONFIG_AT_HOST_LIBRARY=y

 

Kind regards,

Håkon