hik rx.tx point

[salimy21]

hi how find tx rx point on this nvr?

 

[alastairstevenson]

It's the white 4-pin plug above the barcode label.

 

[salimy21]

It's the white 4-pin plug above the barcode label.

How can I find RX, TX?

 

[alastairstevenson]

The connector is the same as the cameras.
Example : UART connection to recover Hik cameras