Sending garage door RAW does not transmit

Sub-GHz
#1

Hi,

I’m new to this, so bear with me.
I have an Automatic Technology PTX-6v1 garage remote, which Read cannot read.
I have confirmed the frequency on https://fccid.io/X4K-PAPTX7V100 and through the Frequency Analyzer, which peaks nicely with the modulation set to AM650.
The remote has four buttons, with button 1 paired to the garage door.
The remaining buttons still transmit, as is evident by the Frequency Analyzer output, but more importantly by an LED indicator flashing on the unit. Sending a RAW recording of any of these does not trigger the LED indicator.
I’ve tested the various preconfigured modulations with no success.

I understand that the signal not being read using Read is likely due to the protocol not being configured.
To this point, I have also gone and created manual signals for each available protocol I could find on GitHub, and none were received.
Is the RAW not being received indicative of the modulation also being incorrect?

I can see that you can create custom modulations with a little bit of research and time, but I’m not sure where to begin.
Should I be investing in an SDR tool?

Further to this, assuming this is the issue and I correct it, once I have some decent RAW samples that are confirmed as received, would creating a TrioCode128 protocol be arduous or worth attempting?

Thanks!

#2

What led indicator are you expecting light up? If you mean the garage door receiver it’s possibly because it uses a rolling code.

The PTX6 remote control has four buttons, which will allow you to code this remote control into four different door or gate openers. The PTX6 remote control features a rolling code encryption called TrioCode128, which generates a new code each time the button is pressed from trillions upon trillions of possibilities. By transmitting across three frequencies, the PTX6 all but eliminates interference problems, meaning your garage door will open with every press of the button. Due to the remotes high security, only your garage door remotes will ever open your gate or door preventing code grabbing devices from ‘replaying’ the code to open your garage door.

#3

Yep, I was referring to the garage door receiver. That makes sense. Thanks.

In that case, there is no reason for me to believe the modulation is wrong.

Focusing on the protocol, are there any resources that I should be looking into to attempt to create one?
I’ve not been able to find anything as of yet.

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#4

The Flipper doesn’t support capture of rolling codes by design. When it did I was constantly explaining to people why they messed up their car and how to fix it. :laughing: You should look into the “add manually” feature. It’s explained below but long story short it allows the Flipper to be used with many garage doors in a way that won’t mess them up.

#5

That’s what I want to achieve, but the protocol isn’t listed.

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#6

Did you try those options in the list? I thought there might be a possibility you garage supports one of them. Sometimes you have to test to find out. Don’t assume your garage only supports one protocol.

#7

I have. I mentioned that in my original post. I’ve gone through them all and tried to pair.
Not just those that are in the default firmware, but all the protocols I could find in GitHub.
Thanks for the advice though.
Any pointers on where to start next?

#8

I assume you mean the following.

It wasn’t clear what you meant by that but I understand now. :laughing:

It seems to me you are very determined so actually… yes… it’s probably time to try a full fledged SDR.

I’m going to talk about the low cost option starting at around $30 because it’s how most people start. The low cost option can’t transmit though. If you want to buy something that can transmit those start at around $100.

I currently like the Nooelec RTL-SDR V5 best because they increased the receiving range. You may want to buy the package that includes the antennas because it sounds like you probably don’t have any. I also always recommend a USB extension cable.

Optional USB extension:
1 Reduces interference on some frequencies when the SDR is in a USB 3 port.
2 Keeps the SDR from blocking other USB ports
3 Reduces overall frustration
4 Six inches or longer depending on preference.

Higher priced options if you want transmit… Have a look at Lime SDR but there are quite a few options.

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