BTT E3 RRF V1.1 Not communicating with Marlin firmware

[Cowbite]

Firmware is from the BTT Master - Marlin-2.0.7.2.x-E3-RRF. ESP3D is installed and I can see the dashboard but nothing actually works. The PRINTER tab shows no info. I've tried setting the baud in the firmware to 115200 and then 250000 and setting it to the same in ESP3D to no effect.

How do you establish a link between the two (printer and wifi module)? Do I need to define another serial port in Marlin?

#define SERIAL_PORT 1
#define SERIAL_PORT_2 -1
#define BAUDRATE 250000

These are the only serial port related settings I have currently.

Any help would be appreciated!

[Cowbite]

I solved my own problem. I watched the video in the other RRF thread and all I had to to was change the serial port to 3.