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nrf52840 UARTE problem with SDK 15.2.0

Hi,

I am trying to make the two UARTEs from nRF52840 work at the same time, but I am facing some problems even with the examples found in the SDK. I am using the peripheral/serial_uartes example found in the SDK 15.2.0, with no modifications at all, in an nRF52840 development kit, which receives data from UARTE0 (from PC via USB), which is sent to UARTE1 and, sent back to UARTE0 and displayed back in my terminal software in PC. The example starts working fine but after some point it stops receiving data in UART0 coming from the PC, where I have to restart the board for it to work again.

My goal was to make two UARTEs work independently from each other, where I want to receive commands from PC via UARTE0 and control another device in UARTE1. I am also facing problems with this, since the example seems to be blocking (even if setting 0 timeout), but my main concern right now is the described above...

Is there any other working example anywhere, more like the one I need?

Any help would be very much appreciated.

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