Spying on comms with portable SDR
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- Опубліковано 8 лип 2024
- Using SDR on a phone or laptop to listen to FM communications that a lot of shops have these days.
Site map link is here:
web.acma.gov.au/rrl/site_prox...
Unit type (maybe) link is here:
www.motorolasolutions.com/en_... - Наука та технологія
![ОРБАН приехал к ПУТИНУ и "отчитался" о поездке в Киев 😁 [Пародия]](http://i.ytimg.com/vi/_0ukDovOWq8/mqdefault.jpg)
Absolutely love these SDR videos. Way back a couple years ago, you posted a video of “noticed my neighbor has a weather station …. That means *I* have a weather station.”
No shit like two weeks after that, I noticed my neighbor put up a weather station. Busted out a spare sdr dongle, spun up a new virtual machine on the proxmox node, did a little fuckery and that info is now displayed on my home assistant dashboard.
Friggin mint!!
Was that you telling me about that at the time? One guy said he did the same and I asked him how he did it. I've been playing with Tasmota lately getting the hang of it, but I think I might have to set up Home Assistant again and maybe use ESPHome if I can work one of those out.
If they're going to piss it out into the ether, it's yours for the catching.
@@TallPaulTech I *think* so. I used RTL_433 with MQTT to pump into home assistant. I think youtuber MostlyChris has a video on the HA yaml that I loosely based my config off. On the "radio" virtual machine, created a service to run rtl_433 with the following command:
/usr/local/bin/rtl_433 -C customary -f 915M -F mqtt:192.168.0.20 1883 user homeassistant pass yermqttpasswordhere events rtl_433[/model][/id]
In HA, all you have to do is sub to the appropriate topic and maybe do some math to parse out some of the info. Your video absolutely inspired this, and it's been a great addition since!
I only really started playing with MQTT just the other day. I have a broker set up now and should be ready to do it. The HA part is the bit that seems to have pieces missing with my install. I can't even add add-ons. I'll install that as a pre-made image another day.
@@TallPaulTech Spent years avoiding MQTT in my HA environment, just seemed like a giant unnecessary pain in the ass. Finally gave in, and its relatively useful for a few different things. Currently just using the HA Mosquito addin for HA. Apparently you can even send base64 images over MQTT, such as stills from blue iris for example. Haven't quite worked out to make useful notifications on my phone of that, work in progress.
6:06 threatening to climb 😂
“Hey varmints, get me a ladder here or I’ll be fixin to climb these contraptions” 🤣🤦♂️
Them's fighting words!
@@TallPaulTech Sufferin suckatash!
Is that an SDR antenna in your pocket, or are you just happy to see me?
Interesting, some things never change. I used to monitor random frequencies with a RadioShack Pro 26 scanner, walk around town, visit the mall, public events, airports or listen in to cell phone calls etc. just to see what I could hear. Now days I can monitor random radio traffic with my SDR rspdx with a roof mounted antenna from the comfort of my home.
During the mid 1980s I had a Realistic VHF/UHF scanner that covered all of 30 to 1000Mhz and a group of us on UHF CB had loads of fun listening in on all the stuff being transmitted. This was before encrypted or digital radio so all the police channels and early mobile phone channels were easy to listen in on. But to be honest, it quickly became boring because most people talk about uninteresting things. Can't believe that was almost 40 years ago. These dongles and software are so much more advanced to what we had back then.
Wonderful demonstration - thanks!
The thought of some bloke flogging a straw hat from Bunnings is great!
If anyone's going to do this with an android phone I recommend feeding 5V from an external battery into the OTG cable somehow since running an FFT app and the RTL-SDR dongle will eat the battery up.
And to think, if he'd had portable SDR and some earbuds, he might have got away with it too! (Or, alternatively, the store could take the attitude "Well, we might've let you go for the sake of a straw hat, but you coming in here all tooled up like James Bond, well, now we're _definitely_ gonna prosecute! And 'going equipped to steal', Ooh, the judge is gonna throw the book at you!"
Fun for the whole family. Gotta get me one of those dongles.
😆 "This customer is sooooo annoying!" 😆 That would be so funny to hear.
I have to give you a hard time about this... It's nice and all with computer, software and RTL dongle, its a bunch of work when you can just use a hand held scanner! 👍🤠 Many of the business radios here are digital DMR or NXDN, although there are many unlicensed GMRS used as well. Your website is much nicer than the FCC where you have to know lat-long and dig into each record to find all the particulars. But again, many use only unlicensed radios so there are no records at all.
I have been using SDR receivers for 13 years now I use SDRPlay duo, it is the only one that works well and has excellent characteristics, with an excellent quality-price ratio with internal filters, if you are in places with little electromagnetic pollution RTL or Nooelec are also fine. Ciao
Cool, I have a few of sdr receivers, SDRplay, Adalm Pluto and some of the cheaper usb devices.
Great video, so i should be able to listen the same with an old analogue scanner
For sure
Is that "spreads all over the place" not just imaging in the receiver from overloading the front end of the SDR? Those RTL-SDR sticks are notorious for it.
Ever since joining Simpsons pages on facebook i really want to visit a Brunnings Warehouse and have some snags and some VB Tinnies. That location sounds more exciting than the hardware stores in my area.
Awesome
Very cool super cheap snooper! Signals showing up across the spectrum during a strong nearby transmission is definitely front-end overloading. I'm not sure but I suspect that the software is recording the entire bandwidth? You could try adding an attenuator between your antenna and sdr input, but that would affect the other near by transmissions, so you won't capture as many signals. As someone mentioned before those cheap rtl-sdr dongles weren't designed for narrowband signals detection and over loading is a known issue.
I have a UHF in my car
When stuck in road works i scan for the channels their on top know when it's time to go soon
Also to keep eye on traffic on ch40 for coopers
I like your portable SDR rig. Might have to buy a small antenna like that for my SDR. I use SDR touch for android and the same on the go cable. I'd like to figure out an external power source for the SDR so my phone doesn't need to power it because it drains my phone's battery. Also I'm worried about something blowing in the USB section of my phone because I have another smartphone that I got at a yard sale and the USB port didn't work. Same with my tablet.
Lots of places use those in my area, Woolworths, Coles, Mitre10, Cinema, Hotels, Aldi, etc , but looking at the ACMA map for my area,
only Coles shows up, the others either Do not show up as a site, of if they do, no HI-Band UHF, only as a Cell, Paging, Government radio site.
Has me wondering then, if places like Woolworths, have 1 set freq Aus wide, or are listed off a different site in the area
With UHF it does not need to be very strong, 100mw will cover around half a mile of cluttered space, or a couple of miles of open space. In mobile applications the output FET will typically be under-run so it has some tolerance to poor SWR. The visible harmonics are the result of no front end selectivity on the dongle, it does not take much field strength from close proximity to overwhelm it which is why using SDR for amateur radio you typically need some form of band pass filter.
Yeah, that's why I have an FM band stop filter so it doesn't spill into the aircraft band because of the aliasing of SDR. Still, for a cheap dongle it's handy
@@TallPaulTech Not sure I follow, on receive why would it matter what the aliasing product is other than de-graded performance issues? Typically an RX front end wont re-transmit the alias product as the antenna side is on the input side of the receive amplifier buffer transistor and the product is on the output side of the transistor.
See this video at this point where I tried to explain it ua-cam.com/video/sT-bZuQMDC4/v-deo.html
@@TallPaulTech Ah ok, I see. I thought you where worried about causing interference or something. Yes, when used with an external antenna you will need some form of pre filtering with an SDR. This is mostly because the first transistor in receiver (LNA) is wide band and well over unity gain. Some more expensive SDR kit has a software tunable bandpass filter, though it is not as deep as your 55db mechanical filter. Search "SDR tunable front end" for examples.
Lmao, the person taking a long time "at the toilet" so odd to hear that and the super said I was getting worried about you. Let her poo in peace! Haha. And the customer threaten to slime himself?!?! Sounds like an adult bookstore feed. Lol
Cool stuff... 1 watt for that stuff is a bit much...
Watching 450NHz?
Try setting the antenna to nearly lambda/4
Maybe better results
I have a SDR Play RSP DX and Aldam Pluto for DATV Video Receiption, I use SDR Angel Software,
One day I'll look at that SDR Angel program
I actually built a portable SDR with my phone, my RTL-SDR, and the OTG cable and an antenna I bought on amazon and I have it velcroed to the back of my phone. Seems to work fine. I can listen to FM radio on it.
Since this channel is called Tall Paul Tech how tall are you?
My Nokia has a built in FM radio :)
@@TallPaulTech My samsung does too but has no app with it but nextradio works fine.
Hi, awesome video!
It appears RF Analyzer (I think that's the app you are using?) doesnt seem to be supported in the last Android version - is there any other app that could be used?
Really? Things got updated and now they don't work? Surprise surprise.
Mhm, helpful ...
SDR++ has a pretty nice android app, not very touch-friendly but it gets the job done.
Can you share a link to the Android app?
Agreed, I don't think I found an app that works as well as the one you showed on the phone.
This would be quite interesting to run on a Pi Zero W or Zero-2 W in your pocket - put it together neatly in a little case and then you can perhaps control that over WIFI from your phone?
Also I presume police frequencies are now encrypted or digital or can you still listen to those?
In some places police uses a higher frequency just outside the rtl-sdr range, everyday patrol wouldn't be encrypted but I believe is usually digital so control can see live telemetry and location via radio
I've done something similar at the MacDonalds drive through. Cool at first, but nothing much interesting to listen in to.
No CTCSS on these channels as well?
That depends on them, but that doesn't matter for this
Interesting. What is the name of the Android app.
What was the phone app called?
RF Analyser I believe. Am going to look for it too.
@@fotografm Yeah could not find it on the Google Apps store, any luck?
Go to the actual github I think it was and get it from there
MATE! whaaaat. I juat spat my hot milo on my dog. This is unreeeeeaaaaal
Milo?!
Poor dog
Poor, poor Milo.... 😢
The fun thing is when you start to play back the recordings.. ;)
But it’s sucking battery like hell
Leaving a laptop and a bunch of radio equipment on open view in a car, parked in one of these big, suburban retail parks?! The Australians must obviously not be as thief~ish as the Irish, no~one here would put their stuff on offer like that!
its crazy,bravo🫢