I have just bought a HDMI matrix switcher.

It claims that the matrix can be controlled by RS232.

I am trying to control it via a Phillips Pronto and a serial extender.

The extender indicates that it is sending RS232 signals but I cannot get the matrix to switch.

I have been given ASCI codes like POWER 00 is which is 504F574552203030 in HEX but again no luck.

Does anyone know how I can test the matrix by directly controlling it with a PC and Hyper Terminal.

I had a quick look and it looks like Hyper terminal requires files as opossed to strings.

Thanks for any help!

Regards Alf