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skr v1.4 turbo unable to connect raspberry pi 4b with serial connection gpio

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I am new to BigTreeTech. I just bought a SKR v1.4 turbo to use on my Ender 3 Pro. I am trying to connect to my raspberry pie using the GPIO pins. I have it setup correctly. Everytime i try to connect it tells me it is unable to establish a connection with the SKR v1.4 turbo. Please help


Steps for connection:



deleted the following from /boot/cmdline.txt:


diabled getty:

sudo systemctl stop serial-getty@ttyS0.service 
sudo systemctl disable serial-getty@ttyS0.service

set firmware serial ports to (and have tried the inverse of the below:

#define SERIAL_PORT 0

#define SERIAL_PORT_2 -1

in octoprint i set the connection to: 


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