Receiving data from unknown devices

[fntslz]

Hello,
I 2 remote controls 433, one is detected as Protocol No. 1 while the other is not detected (has a coding with 12dip-switch).
How can I do to be able to receive the 12 dip-switch?
Thank you.

[Martin-Laclaustra]

check issues:
#103
#112

Your second control may be 32 bits constant bit-length but with different pulse lengths (like all the standards in rc-switch) or a new NEXA-like 64 bits different-on-off-bit-length. You will be able to see this when you record your signal.
It can help if you declare which platform you do use (Arduino or Rpi).

If you use Arduino, you can use Suat's signal recorder:
https://github.com/sui77/SimpleRcScanner

[fntslz]

yes..i use arduino with cheap rx433 .
alfter i try to recorder.
thanks.

[fntslz]

OK done.
Now you can explain to me how to create my protocol?
Thank you.

[Martin-Laclaustra]

It looks like a 12-bits inverted protocol.
(I am not very familiar with inverted protocols)
Your code is either:
010100110100
or
101011001011
(one of these should match your switch, please report which)
Your protocol:
{ 330, { 34, 1 }, { 1, 2 }, { 2, 1 }, true }

Use:
setProtocol(the order number where you insert it in the RCSwitch.cpp file)
and
send(1332, 12)
or
send(2763, 12)

Please report if you succeed and describe in detail your brand and model. Maybe even with photographs or links to seller.
It would be great if your could open your original remote and report which chipset it uses.

[fntslz]

very great ...

it works.
the model is a "FAAC" fixed code, in Italy it is very common.

Please explain to me how did you determine the protocol?
{330, {34, 1}, {1, 2}, {2, 1}, true} what do they mean?
I could not understand ...

Thank you for your support ...

[Martin-Laclaustra]

Check:
overall explanation of the signal:
https://github.com/sui77/rc-switch/wiki/KnowHow_LineCoding#ev1527-rt1527-fp1527-or-hs1527
how the signal is encoded:
https://github.com/sui77/rc-switch/blob/master/RCSwitch.cpp#L52
how it is encoded in inverted protocols:
https://github.com/sui77/rc-switch/blob/master/RCSwitch.h#L128

[fntslz]

Hello,
I'm sorry ... I read the first link ..but I have not understood ... maybe I'm stupid ...
Kindly you explain it to you with the colors?

how you do the calculations?
I can not understand, seeing the graph, to build the protocol ...

Can you explain to me step by step how you do?

Thank you very much,

[Martin-Laclaustra]

@sui77 you might consider using this image in the wiki.
Best

[fntslz]

..I'm sorry ...
but still I can understand with the "330", how do you calculate ... ??
I made (400 + 612 + 744 + 264 + 400 + 612) / 6 = 505 ... definitely wrong ..where?
Excuse me if I insist ... but I want to understand .. thanks.

[Martin-Laclaustra]

400 + 612 = 1012
744 + 264 = 1008
400 + 612 = 1012
752 + 260 = 1012
Every bit lasts aprox. 1012 us. Every bit is made of 2 units, one long and one short. It is unlikely that the long-short ratio is different (as data suggests) between on and off bits. Most probably it is the same. Let's estimate that ratio combining long lengths and short lengths of a "0" and a "1" type bits: (612 + 752) / (400 + 260) = 2.07
So each bit has 3 timing "ticks", 2 for the long part and 1 for the short part.
1012 / 3 = 337 ~ 330
An approach considering ratios of 1.5 for "0"s and 3 for "1"s would have made quite complex to find a minimum common pulselength for both. It would not have made sense that engineers would have designed the remote that way.

[fntslz]

OK thanks for the help.
Now I have a transmitter, no brand, which transmits approximately every three seconds a string type here ...
honestly can not costriure the protocol ... can you do it?
... unfortunately I have difficulty to understand how it works ...
maybe it's my limit ...
Thanks again for the availability

[kiralikbeyin]

@fntslz #103

[fntslz]

Hello guys,
I've been trying to get my tx signal for days.
Unfortunately my tx is a rolling code ...
The first 2 bytes are always the same .. the remaining length varies ...
How could I get it to receive?
Ideas or suggestions?

Thank you.

[rafkacz]

Hi - can you help with decoding signal for MCE07 rc switch?
This is 4 channel switch. Below signals for ch1 off and ch1 on.
First 500uus is added by me manually.
I see there is a long constant signal (for all channels and on/off function) - this is coded on last 16 pulses (before about 10100us break between repeat). I have problem with recognizing sync signal.
Ch 2 on: