Custom Board Uart Communication

Hi, I am working on custom board with nrf9160. I want to use LTE LINK MONITOR but my uart don't work. I create simple helloworld application from samples. I change uart0 rx pin and tx pin. But it doesn't work. What can I do to solve problem. My config pictures are:

My boards uarts pin: 

I use putty for read FDTI uart-usb converter.

Related