Onkyo-RI

Control Onkyo devices is possible among others through Remote Interactive port. This port is normally used for direct communication between two Onkyo devices (ex. receiver and CD player). But why not turn on the receiver automatically when you start your own player?

Connection

To connect to the RI port is used 3.5mm mono jack. Tip is for data signal and sleeve is ground (GND). Data are sent via TTL logic. So it is easy to connect RI device to 5V MCU (Arduino). Just connect data signal to some output pin and connect GND between each other. In case of stereo jack, connect tip to DATA, sleeve and ring to GND.

Protocol

Protocol description could be found at:

• http://lirc.sourceforge.net/remotes/onkyo/Remote_Interactive

or with grafical representation at:

• http://fredboboss.free.fr/articles/onkyo_ri.php .

Protocol is pretty simple for implementation. In one message is transfered 12 bit code. This code represents action for target device. Most significant bit is send first.

Library

There are two Onkyo-RI library:

• blocking - send() method blocks other program execution until whole command is sent. It takes up to 61 ms.
• non-blocking - send() method only start command sending. The execution is handled by processing() function. This function must be called periodically with maximum 1 ms period. Function return bool value about sending status (true - data is being sent, false - nothing to sent/sending is done). Before the command is completely sent other functions can be executed. Library use internaly Arduino micros() function, so no other timer is not blocked.

RI codes

At mentioned sites are also listed codes for Onkyo devices. Unfortunnately none of the codes is not valid for my receiver TX-8020. To determine the valid codes I wrote a simple loop for Arduino (more below) that goes through the whole 12bit code range (0x0-0xFFF). Results are listed below commands.

TX-8020 receiver

Codes are valid for TX-8020 receiver. With a high probability it will work with other Onkyo receivers.

Action	Command	Notes
Input CD	0x20	Switch input to CD channel
Turn On + CD	0x2F	Turn ON receiver and select CD as input channel
Input TAPE	0x70	Switch input to TAPE channel
Turn On + TAPE	0x7F	Turn ON receiver and select TAPE as input channel
Input BD/DVD	0x120	Switch input to BD/DVD channel
Turn On + BD/DVD	0x12F	Turn ON receiver and select BD/DVD as input channel
Input DOCK	0x170	Switch input to DOCK channel
Turn On + DOCK	0x17F	Turn ON receiver and select DOCK as input channel
Dimmer Hi	0x2B0	Set dimmer brightness to highest level
Dimmer Mid	0x2B1	Set dimmer brightness to mid level
Dimmer Lo	0x2B2	Set dimmer brightness to lowest level
Dimmer Hi	0x2B8	Set dimmer brightness to highest level
Dimmer Lo	0x2BF	Set dimmer brightness to lowest level
Turn Off	0x420	Turn OFF(set into standby) receiver
Test mode	0x421 - 0x424	Some kind of test modes. Leave test mode is possible by code 0x420 (Turn Off). Test modes provides clear of receiver setting.
Radio search next	0x430	Tune next radio station when radio is selected.
Radio search previous	0x431	Tune previous radio station when radio is selected.
Radio Stereo/Mono	0x432	Switch between Stereo and Mono when FM radio is selected.
Radio station next	0x433	Jump to next stored radio station when radio is selected.
Radio station previous	0x434	Jump to previous stored radio station when radio is selected.

TX-SR304 receiver

Thanks to lonejeeper

Action	Command	Notes
Input CD	0x20	Switch input to CD channel
Input TAPE	0x70	Switch input to TAPE channel
Input BD/DVD	0x120	Switch input to BD/DVD channel
Input HDD	0x170	Switch input to HDD channel
Input Video2	0x1A0	Switch input to Video2 channel
Vol Up	0x1A2	Volume Up
Vol Down	0x1A3	Volume Down
Mute	0x1A4	Mute
Power OFF	0x1AE	Power OFF
Power ON	0x1AF	Power ON
Dim	0x2B0	Set dimmer brightness to highest level
Dimer	0x2B1	Set dimmer brightness to mid level
Dimmest	0x2B2	Set dimmer brightness to lowest level
Dimmer Daytime	0x2B8	Set daytime brightness
Dimmer Nighttime	0x2BF	Set nighttime brightness
Test mode	0x421 - 0x423, 0x430	RDS TEST

TX-SR313 receiver

Thanks to wongcz

Action	Command	Notes
Input Aux	0x20	Switch input to AUX channel
Turn ON + AUX	0x2F	Turn ON receiver and select AUX as input channel
Input TV(/CD)	0x70	Switch input to TV(/CD) channel
Turn ON + input TV(/CD)	0x7F	Turn ON receiver and select TV(/CD) as input channel
Input BD/DVD	0x120	Switch input to BD/DVD channel
Turn ON + input BD/DVD	0x12F	Turn ON receiver and select BD/DVD as input channel
Turn ON + input DOCK	0x17F	Turn ON receiver and select DOCK as input channel
Dim	0x2B0	Set dimmer brightness to highest level
Dimer	0x2B1	Set dimmer brightness to mid level
Dimmest	0x2B2	Set dimmer brightness to lowest level
Dimmer Daytime	0x2B8	Set daytime brightness
Dimmer Nighttime	0x2BF	Set nighttime brightness
Test mode	0x421 - 0x423, 0x430	RDS TEST

TX-SR333 receiver

Thanks to ogrady

Action	Command	Notes
Input TV/CD	0x20	Switch input to TV/CD channel
Input BD/DVD	0x120	Switch input to BD/DVD channel
Dim	0x2B0	Set dimmer brightness to highest level
Dimer	0x2B1	Set dimmer brightness to mid level
Dimmest	0x2B2	Set dimmer brightness to lowest level
Test mode set	0x421 - 0x424	Test 1-00,2-00,3-00,4-00
Test	0x425	Test x-01
Test	0x426	Test x-02
Test	0x427	WiFi test
Test	0x428	Route test
Test	0x42a	Key Test Mode
Test	0x42b	Test x-07
Test	0x42c	Test x-08
Test	0x42d	Test x-09
Test	0x42e	Test x-00
Test mode set	0x43e	Test 5-00
Test	0x43f	CEC test

TX-SR600 receiver

Thanks to kelvinlaw

Action	Command	Notes
Input CD	0x20	Switch input to CD channel
Turn On + CD	0x2F	Turn ON receiver and select CD as input channel
Input TAPE	0x70	Switch input to TAPE channel
Turn On + TAPE	0x7F	Turn ON receiver and select TAPE as input channel
Input BD/DVD	0x120	Switch input to BD/DVD channel
Turn On + BD/DVD	0x12F	Turn ON receiver and select BD/DVD as input channel
Input Video3	0x1A0	Switch input to Video3 channel
Turn On + Input Video3	0x1AF	Turn ON receiver and select Video3 as input channel
Power Off	0x1AE	Power OFF (only works if you are currently in Video 3!!)

TX-SR603 receiver

Thanks to jimtng

Action	Command	Notes
Input Video3	0x1A0	Switch input to Video3 channel
Vol Up	0x1A2	Volume Up (only when input is set to Video 3)
Vol Down	0x1A3	Volume Down (only when input is set to Video 3)
Mute	0x1A4	Mute (only when input is set to Video 3)
Unmute	0x1A5	Unmute (only when input is set to Video 3)
Power Off	0x1AE	Power OFF (only works if you are currently in Video 3!!)
Turn On + Input Video3	0x1AF	Turn ON receiver and select Video3 as input channel

TX-SR606 receiver

Action	Command	Notes
Input CD	0x20	Switch input to CD channel
Turn On + CD	0x2F	Turn ON receiver and select CD as input channel
Input TAPE	0x70	Switch input to TAPE channel
Turn On + TAPE	0x7F	Turn ON receiver and select TAPE as input channel
Input DVD	0x120	Switch input to DVD channel
Turn On + DVD	0x12F	Turn ON receiver and select DVD as input channel
Input GAME/TV	0x1A0	Switch input to GAME/TV channel
Vol Up	0x1A2	Volume Up (only when input is set to GAME/TV)
Vol Down	0x1A3	Volume Down (only when input is set to GAME/TV)
Mute	0x1A4	Mute (only when input is set to GAME/TV)
Unmute	0x1A5	Unmute (only when input is set to GAME/TV)
Power Off	0x1AE	Power OFF (only when input is set to GAME/TV)
Turn On + GAME/TV	0x1AF	Turn ON receiver and select GAME/TV as input channel
Setup	0x420-0x424	Displayed: SETUP. Playing loud noisy sounds
CEC test	0x43E	Displayed: CEC TEST OK
TEST 5-00	0x43F	Displayed: TEST 5-00

A-803 receiver

Action	Command	Notes
Volume +	0x2	See notes on volume
Volume -	0x3	See notes on volume
Power On/Power Off	0x4	The receiver actually enters/exits standby since the only way to properly shut it down is through the power switch located on the front of the receiver itself.
Mute	0x5
Input Aux/Video	0x6
Input Tape-2 Monitor	0x7
Input Tape-1/DAT	0x8	Alternative code: 0x70.
Input CD	0x9	Alternative code: 0x20.
Input Phono	0xA	Alternative code: 0x30.
Input Tuner	0xB	Alternative code: 0xE0.
Source direct	0x13
OFF	0xEA	This code will switch the receiver into stanby mode, but it will not switch it back on.

A-9050 receiver

Thanks to Aaron G

Action	Command	Notes
Vol Up	0x2	Volume Up
Vol Down	0x3	Volume Down
Turn ON/OFF	0x4	Turn receiver ON and OFF
Mute/Unmute	0x5	Toggle Mute
Input Line 1	0x20	Select Line 1 as input channel
Turn ON + Input Line 1	0x2F	Turn ON and select Line 1 as input channel
Input Next	0xD5	Select next input channel
Input Prev	0xD6	Select previous input channel
Mute	0xD7	Mute
Unmute	0xD8	Unmute
Turn ON	0xD9	Turn ON
Turn OFF	0xDA	Turn OFF
Input Line 2	0xE0	Select Line 2 as input channel
Turn ON + Input Line 2	0xFB	Turn ON and select Line 2 as input channel
Input Line 3	0x170	Select Line 3 as input channel
Turn ON + Input Line 3	0x17F	Turn ON and select Line 3 as input channel
Test	0x421	Test Mode?
Test	0x422	Test Mode?
Test	0x423	Test Mode?

Notes on volume

Volume control codes shown in the table are sent by the receiver out of its RI ports when adjusting the volume using a remote control (they can be found using an oscilloscope). However, the receiver will not react to these codes when they are sent from an external device, effectively making impossible to control its volume through RI signals.

Test program

Program is located in repo folder Onkyo_test. It serves for check all codes (0x0 - 0xFFF) on target device in 500ms interval. For data line pin 10 is used as default.

Actual checked code is sent as ASCII through serial port and can be displayed in terminal. For serial port 9600b/s is set. Using terminal test program can be stopped, reset or user defined code could be used.

Terminal commands:

• p - pause/run command sending
• r - reset loop (program start from 0)
• hexadecimal number - number in hexadecimal format represents code that user want to test on target device. From this code automatical procedure will continue.