DSPS receive problem

Hi,

I use Murata module Type ZY (DA14580) daughter board with P2ML3078 evaluation board.
I connected the evaluation board to STM32L152 discovery evaluation board.
I use SPI (from STM as master) to load the code to the device, and use UART for communication with the device.

I run the DSPS app on my phone and manage to connect to the device. when my MCU sends data I see it in the app in the phone (I use the console window), but when I type at the app on the phone I don't receive anything in the MCU side (I also look at a scope, tried disconnecting the MCU and look at P0_4 but nothing is transmitted in reaction to typing in the android app).

I appreciate any help I can get
Thanks