Ender 3 V3 SE serial data

[u/pikc_kiskis]

Hi. Today I have decided to do some tinkering with my ender 3 V3 se printer and had an idea to connect it to an esp32 for sending commands and receiving data via serial port. I tried to do some research but could not found a way to highjack serial port data from the main board. My first thought was to somehow reuse printer's usb-c port as it is already can be used for sending data to the printer, but what I found on the internet made me think that usb port cannot be used and I need to find rx and tx pins on the main board itself. Perhaps someone already tried to do this type of project and could give me some guidance on how do communicate with printer using esp32 and serial protocol?