Have you searched this forum?
Usually these kinds of requests does not get the traction you are expecting. It is also impossible to know how much help you need. Do you have a computer with some operating system running? Do you have a caspar server installed? What happens when you try to add a stream?
With that said:
See links:
UDP Streaming on CasparCG 2.3.0 server - General - CasparCG Community Forum (casparcgforum.org)
UDP stream - seems to stream but no image? - General - CasparCG Community Forum (casparcgforum.org)
Try some things and come back with a more specific question.