In my living room there is a Panasonic TV set connected to a Rotel RA-12 amp. The speakers of the Panasonic TV are switched off and the Rotel amp is connected with s/pdif to the TV set.
The IR remote of the TV set cannot be programmed to the Rotel codes, the Rotel amp cannot learn the codes of the Panasonic remote, and s/pdif has no control channel like HDMI-CEC.
So..
This project let you control the Rotel amp with the Panasonic Remote. The TV set ignores the vol/mute buttons when the internal speakers are off.
What's working:
Vol+,Vol-
Vol+ turns the amp on if it's off
Power Off
Mute
Vol+ unmutes
Green Green
when pressing green twice a LED lights up on the Arduino nano
and the nano goes into input select mode.
In this mode Red, Green, Blue, Yellow switches between Rotel amp inputs.
Input select mode stops with any other button an the remote
Parts neede:
- arduino nano
- IR receiver
- MAX 232 serial converter 5V/12V
- Dsub9 plug/cable
- some capacitors
The IR receiver is connected pin 8. See https://github.com/z3t0/Arduino-IRremote for a how to.
The max232 is connected to TX of the Arduino nano, and needs some capacitors. http://www.ti.com/lit/gpn/max232
In PanasonicIrCodes.h I collected the Panasonic remote codes.
The RS232 commands for the Rotel amp can be found at: http://www.rotel.com/sites/default/files/product/rs232/RA12%20Protocol.pdf
I used the following commands:
power_on!
power_off!
mute_on!
mute_off!
volume_up!
volume_down!
coax1!
opt1!
opt2!
aux2!
