How to get data from listener node using UART TTL

Hi,
I want to receive data from listener node using UART TTL.
As i have gone through DWM1001 Firmware user guide, in that data can be received using uart headers and RPi.
I just want to use a listener node and UART TTL only.
Is it possible?
Because i am getting error while connecting UART pins of J10 connector with TTL.
Thanks
Akansha