See the attached picture.
Her yellow beam - SPI_nattn, blue - nRes, purple - DOUT (PIN2). This image shows that the unit is not moved to the SPI mode as it attempts to answer by UART. I transcribed at the output of UART in binary form following: 011110010101101001010101100001. In this report, there are start and stop bits, and data, In my opinion this is 3 bytes in hex it would be 4F 4B 0D. It's not like any API frame or AT command. I tried to read the data on the SPI after a narrow peak on the SPI_nattn line all time while SPI_nattn not yet moved to the upper level.