Delay when using command line about samsungctl HOT 1 OPEN

What TV model is this? Please try if you can reproduce the instantaneous behaviour with samsungctl library yourself.

One possible cause is that, with your TV model, it takes 5 seconds to establish the connection but after that it is fast. Using samsungctl as a library (probably what Home Assistant is doing) you can keep the connection alive. However, the samsungctl command cannot really reuse connections. If this is really the case you can make a better command line client that uses some kind of daemon to share connections.

from samsungctl.