Sending Marantz in Pronto format #1038

elockman · 2022-10-28T17:04:41Z

elockman
Oct 28, 2022

I am running into an issue where IR commands stop working after the first transmission.

I have a simple program to turn a Marantz AVR on and off as a test, every 6 seconds.

void loop(){
  hex_marantz_on();
  delay(6000);
  hex_marantz_off();
  delay(6000);  
}

Only the first IR command executes. If I swap commands and Flash, the AVR will switch power states once.

These are the commands I'm using:

void hex_marantz_on()
{
  irsend.sendPronto("0000 0071 0000 0024 0020 0020 0020 0020 0020 0020 0040 0020 0020 0020 0020 0020 0020 00A1 0020 0020 0020 0040 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0020 0AAB 0020 0020 0020 0020 0020 0020 0040 0020 0020 0020 0020 0020 0020 00A1 0020 0020 0020 0040 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0020 04B0 ", IR_REPEATS);
}

void hex_marantz_off()
{
  irsend.sendPronto("0000 0071 0000 0022 0020 0020 0020 0020 0020 0020 0040 0020 0020 0020 0020 0020 0020 00A1 0020 0020 0020 0040 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0040 0AAB 0020 0020 0020 0020 0020 0020 0040 0020 0020 0020 0020 0020 0020 00A1 0020 0020 0020 0040 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0040 04B0 ", IR_REPEATS);
}

IR_REPEATS is 3, but I've tried reducing all the way down to 0.

Next, I tried just to run a simple power toggle program

void hex_marantz_on_off()
{
//  toggle power
  irsend.sendPronto("0000 0073 0000 0018 0020 0020 0020 0020 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0020 0020 0040 0020 0020 0C5B 0020 0020 0020 0020 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0020 0020 0040 0020 0020 0498 ", IR_REPEATS);
}
void loop()
{
  hex_marantz_on_off();
  delay(6000);
}

Only the first IR command works. I must cycle IR device power to toggle the AVR power.
Anyone have an idea why the device needs to be rebooted? Can I reset the the IR buffers once sending the commands?

Answered by bengtmartensson

Nov 1, 2022

Most protocols/manufacturer (NEC being the canonical example) call their parameters device (D), subdevice (S) and function(F). Philips (creator and main user of the RC5 protocol is a tad different: By RC5, the are calling the "device" parameter "system" instead, and said "command" for "function". When the RC5 protocol was going too small, they did not create a "subdevice", but extended the command/function instead. See above: command 12 is power toggle by very many RC5 devices; it is "extended" with a "extension" to form discrete power on and off commands.

IrScrutinizer (which builds on IrpTransmogrifer) borrows the definitions of RC5, RC5x, RC6* etc from the JP1-community, in particular …

View full answer

elockman · 2022-10-28T17:31:21Z

elockman
Oct 28, 2022
Author

The IR codes above came directly from Marantz's documentation. They are labeled "Hex Code (Basic Commands Only)"

They work (kind of), but do they have to be converted to Pronto somehow?

0 replies

ArminJo · 2022-10-29T20:13:36Z

ArminJo
Oct 29, 2022
Maintainer

@bengtmartensson Any Idea?

0 replies

bengtmartensson · 2022-10-30T09:36:38Z

bengtmartensson
Oct 30, 2022

The given signal decode (in IrScrutinizer) as RC5x: {D=16,S=12,F=1,T=1} and RC5x: {D=16,S=12,F=2,T=1}, in both cases two copies. The RC5x is a toggling protocol, meaning that the toggle ("T" above") is supposed to toggle between 0 and 1 on subsequent invocations. But you are sending using T=1 all of the time, so the receiver ignores all but the first one, as it should. You need to send signals with T=0 alternating.

Corrsponding signals with T=0 can be generated with IrScrutinizer:

{D=16,S=12,F=1,T=0}: 0000 0073 0000 0011 0020 0020 0040 0040 0040 0020 0020 0020 0020 0020 0020 00A0 0020 0020 0020 0040 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0020 0AA8

{D=16,S=12,F=2,T=0}: 0000 0073 0000 0010 0020 0020 0040 0040 0040 0020 0020 0020 0020 0020 0020 00A0 0020 0020 0020 0040 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0040 0AC8

So if you change your code to something like:

static unsigned int T = 0U;
...
void hex_marantz_on()
{
    if (T)
        irsend.sendPronto("0000 0073 0000 0012 0020 0020 0020 0020 0020 0020 0040 0020 0020 0020 0020 0020 0020 00A0 0020 0020 0020 0040 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0020 0AA8", IR_REPEATS);
    else
        irsend.sendPronto("0000 0073 0000 0011 0020 0020 0040 0040 0040 0020 0020 0020 0020 0020 0020 00A0 0020 0020 0020 0040 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0020 0AA8", IR_REPEATS):

    T = 1U - T;
}

it should work.

BTW, Infrared4Arduino handles the sending with alternating toggles automatically (for the RC5 protocol).

1 reply

ArminJo Oct 30, 2022
Maintainer

@bengtmartensson Thanks for the explanation.
BTW, the Irremote function ~~sendRC5ext(uint8_t addr, uint8_t cmd, bool toggle)~~ also supports automatic toggling 😀
Update: sendRC5(uint8_t aAddress, uint8_t aCommand, int_fast8_t aNumberOfRepeats, bool aEnableAutomaticToggle) supports automatic toggle.

elockman · 2022-11-01T17:27:32Z

elockman
Nov 1, 2022
Author

@bengtmartensson thank you! I am new to IR, but I downloaded IrScrutinizer and it's a huge help.

@ArminJo if I get the following result from IrScrutinizer, how do I assign the addr and cmd in sendRC5ext()?

RC5x: {D=16,F=2,S=12,T=1}, beg=0, end=67, reps=2
{36.7k,872,msb}<1,-1|-1,1>(A:8,-4,B:12,-73m,C:3,2,D:3,-5,E:12,-31.841m)*{A=0xf0,B=0x302,C=0x0,D=0x7,E=0x302}

4 replies

elockman Nov 1, 2022
Author

@ArminJo I got it working. addr=16 (D), cmd=12 (S)

It is working with:
irsend.sendRC5ext(16, 12, false);

elockman Nov 1, 2022
Author

@ArminJo I'm looking closer at the code. It appears sendRC5ext() is deprecated, due to sendRC5() handling both protocols.

However, RC5x should also accept an extension argument (F=?). Is that supported in this library?

ArminJo Nov 1, 2022
Maintainer

What is an extension argument???

ArminJo Nov 1, 2022
Maintainer

OK, it is Marantz specific and not covered by RC5 definitions :-(.
You can try to receive the commands with IRremote, to look, what these special extensions are encoded to.

elockman · 2022-11-01T19:53:48Z

elockman
Nov 1, 2022
Author

@ArminJo Below is a screenshot of the Marantz document I am referencing.

For clarity, I want to send a POWER OFF command rather than an POWER ON/OFF command. This keeps the AVR from turning on by inadvertently toggling from the off state.

The following yields a toggle (which makes sense to me, since I cannot define the 02 extension)
irsend.sendRC5ext(16, 12, false);
The document indicates I should send addr=16, cmd=12, and ext=2 for POWER OFF.

@bengtmartensson I assumed the extension argument is the difference between RC5 and RC5ext protocols?

Full document can be downloaded at Marantz website (Note there are 2 spreadsheet tabs)
https://www.marantz.com/-/media/files/documentmaster/marantzna/us/marantz_fy21_sr8015_sr7015_ir_code_v01.xls

0 replies

bengtmartensson · 2022-11-01T20:31:11Z

bengtmartensson
Nov 1, 2022

Most protocols/manufacturer (NEC being the canonical example) call their parameters device (D), subdevice (S) and function(F). Philips (creator and main user of the RC5 protocol is a tad different: By RC5, the are calling the "device" parameter "system" instead, and said "command" for "function". When the RC5 protocol was going too small, they did not create a "subdevice", but extended the command/function instead. See above: command 12 is power toggle by very many RC5 devices; it is "extended" with a "extension" to form discrete power on and off commands.

IrScrutinizer (which builds on IrpTransmogrifer) borrows the definitions of RC5, RC5x, RC6* etc from the JP1-community, in particular from DecodeIR. In RC5x, it calls system for D, command for "S", and extension for F. This is not really cool ... :-\

1 reply

elockman Nov 1, 2022
Author

Thanks again, @bengtmartensson!

I finally have it working now. I've tested by sending the command multiple times to make sure it goes off, but does not come on with toggle. (I am toggling between T=0 and T=1)

I used IrScrutinizer to calculate the outputs.
The Pronto and RC5 protocols did not work, but I was able to get it to work by sending raw data.

//RC5x: {D=16,F=2,S=12,T=1}, beg=0, end=33, reps=1
//0000 0073 0000 0011 0020 0020 0020 0020 0020 0020 0040 0020 0020 0020 0020 0020 0020 00A0 0020 0020 0020 0040 0020 0020 0040 0020 0020 0020 0020 0020 0020 0020 0020 0020 0020 0040 0040 0AC8
  const uint16_t offRawData[] = {889,889,889,889,889,889,1778,889,889,889,889,889,889,4445,889,889,889,1778,889,889,1778,889,889,889,889,889,889,889,889,889,889,1778,1778};
  irsend.sendRaw(offRawData, sizeof(offRawData) / sizeof(offRawData[0]), RC5_RC6_KHZ);
  delay(50); // delay must be greater than 5 ms (RECORD_GAP_MICROS), otherwise the receiver sees it as one long signal

Sending Marantz in Pronto format #1038

Uh oh!

elockman Oct 28, 2022

Replies: 6 comments · 6 replies

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elockman Oct 28, 2022 Author

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ArminJo Oct 29, 2022 Maintainer

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bengtmartensson Oct 30, 2022

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ArminJo Oct 30, 2022 Maintainer

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elockman Nov 1, 2022 Author

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elockman Nov 1, 2022 Author

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elockman Nov 1, 2022 Author

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elockman
Oct 28, 2022

Replies: 6 comments 6 replies

elockman
Oct 28, 2022
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ArminJo
Oct 29, 2022
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bengtmartensson
Oct 30, 2022

ArminJo Oct 30, 2022
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elockman
Nov 1, 2022
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elockman Nov 1, 2022
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elockman Nov 1, 2022
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ArminJo Nov 1, 2022
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ArminJo Nov 1, 2022
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elockman
Nov 1, 2022
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bengtmartensson
Nov 1, 2022

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