nrf9160 dk uart communication nrf9160 to nrf52840

[Josa]

In a old post https://devzone.nordicsemi.com/f/nordic-q-a/58034/uart-communication-between-nrf52840-and-nrf9160-on-nrf9160-dk This question was already answered but this solution does not work any longer. Please note that I am not using hci_lpuart. How can I configere the Uart so that it can communicate between the nrf9160 and the nrf52840 on a nrf9160 dk? 

[Øyvind]

Hello, 

The case you are linking to is fairly outdated. What version of nRF Connect SDK are you working on? Can you please elaborate more on what you are trying to achieve with the communication? Please note that the nRF52840 acts as a board controller for the nRF9160DK, and that not all functionality is available. I recommend reading the Working with nRF9160DK. 

Kind regards,
Øyvind

[Josa]

I have to say I am new to the nrf sdk and I am using 1.7.0. I am trying to achieve sending bluetooth message from the nrf52840 to the nrf9160 with UART communication. I am using the following examples for this: Peripheral_uart on the nrf52840 and lpuart on the nrf9160. I have tested and the bluetooth part is working I am just not receiving anything on the nrf9160.

[Øyvind]

Josa said:

I am trying to achieve sending bluetooth message from the nrf52840 to the nrf9160 with UART communication.

I suggest looking at the NCS sample nRF9160: LTE Sensor Gateway. This uses Bluetooth: HCI low power UART running on the nRF52840, which send information to the nRF9160 over UART. Note that this sample is based on using the Thingy:52 and its default sample, but can be a good starting point to learn. Have a look at my colleague Håkon's answer here. 

There is also this blog post: nRF9160 DK: Offloading Bluetooth Low Energy related tasks to nRF52840 SoC