[SOLVED] Need a simple C code for JVC TV Remote decoder

[Mithun_K_Das]

Need a code example to decode JVC TV remote.

 

[ALERTLINKS]

https://sites.google.com/site/ehobbyprojects/jvcremote

 

[Mithun_K_Das]

That is transmitter. I need to decode the transmitted code. That means the receiver....

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Basically I need to design an analyzer to check all JVC remote. That means I want to find what the data and what the command is being sent.

 

[ALERTLINKS]

Some relative information,

https://support.jvc.com/consumer/support/documents/RemoteCodes.pdf
https://www.remotecentral.com/cgi-bin/codes/jvc/
https://wiki.nethome.nu/doku.php/analyzer/start
**broken link removed**
https://goughlui.com/?p=5706
https://www.academia.edu/4849509/More_products_at_Signal_Analyzer_for_Infrared_Remote_Control

 

[Mithun_K_Das]

What is the protocol of this type of remote?

I tried with my oscilloscope to take the pulses and I compaired with standard protocols. But I can't find what is the protocol, it doesn't match with any standard as NEC, JVC, SIRC....etc.

Here is the pulses I got from this remote.

 

[hexreader]

Googling suggests that remote control may be be a universal remote, but the limited information is unclear. If I am right, then nobody can guess which protocol has been set up.

Maybe consult the manual that came with the remote handset and set up a popular protocol such as Sony SIRC or NEC.

If you have no manual, then maybe bin that remote and buy one with a manual.

The waveform that you show does not match any protocol that I know of. I know of no obvious protocol that has about 5mS mark for a header. I assume that the trace you show is high with no signal and goes low for a mark. I further assume that the signal is high before the sample that you show, and high at the end of the sample that you show.

Looks easy to decode (if you can program a micro-controller). Short spaces are probably zeros, while long spaces are probably ones.

24 bits in all.

Try every button on your remote and see how the ones and zeros differ.

Better still, get rid of that remote and use one that provides a popular IR protocol.

 

[Mithun_K_Das]

Using this type of remote will Kill my time. I wish to sell them all in local market and I want to use SONY remote. That is very standard.

 

[hexreader]

Yes, Sony protocol is the simplest to work with.

Good choice.

Be aware that Sony remote controls work with 40kHz carrier frequency, not the more common 38kHz or 36kHz carrier frequencies.

A typical 38kHz 3-pin receiver chip will accept all 3 frequencies, but range will be halved for Sony 40kHz or RC5/RC6 36kHz.

If you want the most common protocol - use NEC 32 bit. Harder to work with than Sony protocol, but probably the most popular protocol of all (I think).

 

[Mithun_K_Das]

yes, I understand. But what is the way to extend the remote distance?

 

[hexreader]

yes, I understand. But what is the way to extend the remote distance?

Use a 40kHz receiver module for maximum range with a Sony remote.

The receiver frequency should match the transmitter frequency for best range.