I have a LG TV(LG 32SL800 ZB), which has a RS232-Port for Control and Service.
And I am wondering if I could control this port with my Arduino (NODE-MCU) and a module like this one RS232 Board?
How could I then control the TV? This is the Manual for the TV at page 124 there are the commands how to control it, but how can I send them?
My last question is, how long can the cables from the arduino to the module be? They have to be about 2-3m long! Is that possible without any other hardware?