Synthesising Wireless Doorbell In GNU Radio

[@TallPaulTech]

You know the drill, "Until next time, take it easy!"

[@jamess1787]

Get another coded shade remote, and Hack some transistors onto your roller shade remote. Fire a GPIO, bammo: automation for rolling code remotes. (At the expense of a remote and few GPIOs)

[@julietittler9171]

This was an amazingly clear and well explained tutorial. Thank you ever so much for all your effort. It really helped me study for my Wireless Security final.

[@TallPaulTech]

...and here I thought I was just slapping some mad shit together

[@AdityaMehendale]

I did the same today, with DVB-T SDR and AirSpy SDRSharp and (Record Audio @433.9MHz --> ) Audacity --> screenshot --> Inkscape. My observations, slightly different than yours: 1) I get 31 "bits" (instead of the 25 that you see) 2) The duty-cycles are 25% for (let's say) "symbol ZERO" and 75% for "symbol ONE" (On/Off keying or "digital" AM) My suspicion is that due to saturation in your receiver, each pulse gets smeared horizontally, and because of this, you see the symbols as 40% and 90% (+15% stretched) Nice demo of the powerful functionality of GNU_Radio!

[@DeShark88]

Omg, I've been looking for this video for years! Thank you so much, this is really clearly explained, and at a level that I can actually follow this and build from it! You're the best! Do you have a patreon/Ko-Fi/etc. for me to buy you a coffee or something to say thanks?

[@TallPaulTech]

Haha, thanks. I don't, but I've often wondered about that since it seems everyone else does.

[@julietittler9171]

@@TallPaulTech I'd buy ya a beer. 8-)

[@brianthird4173]

I love this channel, can I ask where you learned GNU radio? I find the tutorials daunting but this is very intuitive.

[@TallPaulTech]

I have no idea. I agree, there's fuck all in the way of instructions out there. That's partly why I made this video.

[@CamStansell]

mate you are next level. i mean im a technician of sorts but i love everything tech .. i watch your vids with enthusiasm and man i am embraced . your a fucking smart carnt mate and i appreciate every little bit of stuff i can inject in my brain. did you say you got home assitaant? ive been loving building my HA up. please keep up the vids your a legend.

[@TallPaulTech]

Yeah, I've got a few things set up, and did a couple of my own things with MQTT from my motion sensors that are on my raspberry pi, when I walk to a certain area, certain lights do certain things.

[@CamStansell]

@@TallPaulTech nice. I use node red for most automations

[@TallPaulTech]

Your avatar reminds me of that old wine ad that got banned

[@p1366]

Very good example. Thanks.

[@R2-9000]

How have you set up the GQRX at 2:00 time? so that is displays the real time frequency and the waterfall like that? I'm sure there is a simple zoom function available maybe...

[@123strelok]

Is there a program in which you draw final signal that you want or input it through parameters and it generates you that backed automatically ?

[@TallPaulTech]

....see, that looked like English, but I haven't got a fucking clue what you just said!

[@123strelok]

​@@TallPaulTech well, as it is not my mother tongue I will try to elaborate. There must be smarter people which already made a program in which you can input given vector with its lengths, frequency, period and etc.. and it generates wanted signal for you. I misspelled backend as backed in initial comment On the other hand, never mind. I will do research on my own

[@Lordofrimgs]

Your videos are all awesome..

[@TheGreenkey]

Great video as always! Do you know of any way to deal with the rolling code from your shutters? Maybe some reverse engineering of the shutters and remote? 🤔

[@TallPaulTech]

I have an idea about that. It's possible, since I have control of the receiving unit, and any remote can be paired just like a new garage door remote. You'd have to keep track of your progression though. It's not high on my list of things to do.

[@SierraLimaOscar]

@@TallPaulTech How do the rolling code works with multiple remotes? I assume the receiver needs to maintain a record (database) of each transmitter to be able to check the sequence? How many transmitter could a simple receiver like this hold? Anybody has any practical experience with this?

[@phreak074]

reminds me of the bq5/10 standing sonar watch on the ol' 688

[@phreak074]

"but not everyone's got a big ding-dong like me . . "

[@programorprogrammed]

Great vid, thanks bud.

[@g.s.3389]

Hi, the decoding could have been done also using URH (universal radio hacker), you could try to make an update video using that tool. Anywaay another amazing tutorial of yours, cheers from Italy.

[@TallPaulTech]

It could have been done with a lot of things, but this video was primarily to show how some gnuradio blocks work

[@DasIllu]

If you talk to an old ham, they would tell you that they needed nothing more than a dual lever key to do this :D

[@AxelWerner]

Can you make the fonts and content any smaller ??? I almost still can read some of it.

[@MrGeekGamer]

Buy a bigger monitor. That or sit closer to the screen.

[@Leiton1985]

“Not everyone has a big ding dong like me” hahaha classic.

[@weehappypixie]

That's what she said 🤣

[@DannyBradshaw]

That’s a big ding dong mate 😂😂

[@TallPaulTech]

That's what Ya Mamma said too!

[@jamess1787]

😹😹😹😹😹

[@magnets1000]

rtl_433 can probably decode it with less legwork

[@Numian]

Sad is that HackRF One price is pretty steep just to play with ding dongs ☹️

[@TallPaulTech]

It's not 'just' for that

[@Numian]

@@TallPaulTech I know, but I would have it just for that :-D