AWS_IoT example on nrf9160 to be integrated via UART_2 to external nrf52 mcu

[Ukhan]

Hi,

I'm having issues with using serial lte modem client on nrf9160, I integrated it to external nrf52 but it gives hardfault after some time. I have another ticket opened for that.

What I am thinking of as a fallback plan is to have the aws_iot sample running on nrf9160 and integrate it to external nrf52 mcu via uart, based on the data I receive from uart I'll publish it to the cloud using aws_iot sample on nrf9160.

I know it's not an elegant way but is a quick fix for now since serial lte modem sample apparently has issues.

All I want is uart2 to be running with aws_iot on nrf9160 and it communicating with nrf52. If you could please guide on how to achieve that, it'd be great, thanks.

[Hakon]

Hello,

have you looked at the UART sample code? It shows how to set up basic UART communication with UART 0. If you want to use a different UART instance, like UART 2, you can just change device_get_binding() to use UART 2 instead. Then you can integrate that code with the AWS IoT code.

You probably need to change the board controller so that UART 2 gets routed to the external pins on the DK. This post describes how to do that.