How far can I broadcast LoRa packets WITHOUT a radio? - LoLRa

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  • เผยแพร่เมื่อ 22 ธ.ค. 2024

ความคิดเห็น • 1.1K

  • @LanceCSTCuddy
    @LanceCSTCuddy 9 หลายเดือนก่อน +982

    You’re crazy. I’m convinced that all RF engineers are wizards.

    • @avramitra
      @avramitra 9 หลายเดือนก่อน +27

      I was convinced long ago that Charles was a wizard.

    • @Thefreakyfreek
      @Thefreakyfreek 9 หลายเดือนก่อน +8

      Aleays have been

    • @tomfahey2823
      @tomfahey2823 9 หลายเดือนก่อน +31

      RF engineering is basically Black Magic (or so I've heard).

    • @theKLAMOS094
      @theKLAMOS094 9 หลายเดือนก่อน +10

      Yeah I did a lora project before starting my engineering degree... Sweet and tears man, but mostly a huge amount of datasheet and theory to read

    • @Jamey_ETHZurich_TUe_Rulez
      @Jamey_ETHZurich_TUe_Rulez 9 หลายเดือนก่อน +3

      Yet they remix ideas every 4 years for children wonderment.

  • @papa_gowon
    @papa_gowon 9 หลายเดือนก่อน +713

    Charles: so I made the GPIO pin go real fast. FCC: and I took that personally.

    • @Thefreakyfreek
      @Thefreakyfreek 9 หลายเดือนก่อน +41

      I dont think there is a better meme for this video
      😂

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +47

      I am unfamiliar with this meme

    • @red13emerald
      @red13emerald 9 หลายเดือนก่อน +30

      I think the FCC can't even complain if the signal is below the noise floor, could it?

    • @terjeoseberg990
      @terjeoseberg990 9 หลายเดือนก่อน +33

      @@red13emerald, The problem with this is that the desired signal is below the noise floor, but there are other undesired signals being produced that aren’t. These need to be removed with a high pass filter.

    • @Thefreakyfreek
      @Thefreakyfreek 9 หลายเดือนก่อน +4

      @@red13emerald fair point

  • @ZackFreedman
    @ZackFreedman 5 หลายเดือนก่อน +11

    If there were a hall of fame for filthy, sleazy weapons-grade jank, you’d deserve a whole wing

    • @CNLohr
      @CNLohr  4 หลายเดือนก่อน +2

      I still yearn for more!

  • @macyler
    @macyler 9 หลายเดือนก่อน +274

    Incredible as always. And simultaneously terrifying.
    Now we just wait for the headline “Gaming keyboards had firmware undetectably overwritten to broadcast key strokes hundreds of meters via LoRa, without physical access, from user-mode application”

    • @GeekProdigyGuy
      @GeekProdigyGuy 9 หลายเดือนก่อน +5

      It would only work at a very small volume, right? Otherwise there'd be a ton of noise from thousands of different keyboards.

    • @juliankandlhofer7553
      @juliankandlhofer7553 9 หลายเดือนก่อน +23

      @@GeekProdigyGuy thats the beauty of spread spectrum! just think about how many bluetooth devices are around you and it still works flawlessly.
      well maybe not if everyone was just spewing out subharmonics to get a few picowatts of actual signal 😅

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +110

      there's far scarier things goin on in the world, no need to freak out over this.

    • @drhxa
      @drhxa 9 หลายเดือนก่อน +8

      ​@@CNLohr The only correct response

    • @antonliakhovitch8306
      @antonliakhovitch8306 9 หลายเดือนก่อน +1

      There have been plenty of security research papers along this line

  • @𪛗
    @𪛗 9 หลายเดือนก่อน +569

    "That final output is 69.420 MHz"
    Nice.

    • @dtupper
      @dtupper 9 หลายเดือนก่อน +11

      Nice.

    • @ve4edj
      @ve4edj 9 หลายเดือนก่อน +8

      Nice

    • @dan3a
      @dan3a 9 หลายเดือนก่อน +8

      Nice.

    • @xymaryai8283
      @xymaryai8283 9 หลายเดือนก่อน +7

      Nice.

    • @Krbydav328
      @Krbydav328 9 หลายเดือนก่อน +5

      Nice

  • @DanielSMatthews
    @DanielSMatthews 9 หลายเดือนก่อน +123

    You are a rare human, gifted, tenacious in your pursuit of knowledge, and incredibly generous. Thanks for sharing, the light shines brightly through you.

    • @davidwillmore
      @davidwillmore 9 หลายเดือนก่อน +3

      I'll buy that for a dollar!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +8

      I appreciate your kind words.

  • @juliankandlhofer7553
    @juliankandlhofer7553 9 หลายเดือนก่อน +56

    dude even attempting this is insane. that you managed to get it working is borderline lunacy.
    what you're doing is absolutely masterful and i cannot express how impressed i am

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +19

      Don't let silly things like feasibility stand in your way. Just keep pushing.

  • @Aurorajunior7321
    @Aurorajunior7321 9 หลายเดือนก่อน +156

    This Is The Most Insane "Doing Alot with a Little " Project ive eve seen

    • @Scrogan
      @Scrogan 9 หลายเดือนก่อน +1

      Does it beat space invaders on an ATtiny10? Maybe.

    • @Aurorajunior7321
      @Aurorajunior7321 9 หลายเดือนก่อน +3

      @@Scroganin my opinion yes lol

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +9

      Oh man... I have never heard that turn of phrase but it speaks to my soul.

    • @Aurorajunior7321
      @Aurorajunior7321 8 หลายเดือนก่อน

      @@CNLohr I kinda made it up lol. But it’s so true. Amazing job! Can’t wait to see what you make next!

    • @TheKuptis
      @TheKuptis 8 หลายเดือนก่อน

      @@Aurorajunior7321 Sorry but that phrase predates you. It's been around for quite awhile.

  • @thefatmoop
    @thefatmoop 9 หลายเดือนก่อน +192

    Aggressive bandpass filtering could probably make this fcc passable. Amazing work

    • @kreuner11
      @kreuner11 9 หลายเดือนก่อน +39

      Yeah but that makes this become radio circuitry with a filter and amplifier, etcc

    • @HasanSaclay
      @HasanSaclay 9 หลายเดือนก่อน +6

      Aggressive badass work 😅

    • @nobodynoone2500
      @nobodynoone2500 9 หลายเดือนก่อน +27

      @@kreuner11 Not really, a bp filter can be some traces scratched off copper pcb. It''s dumb (and illegal) to not make or use one tbh.

    • @willhatch7721
      @willhatch7721 9 หลายเดือนก่อน +2

      Was thinking the same thing. This could be a real fun network filter design process

    • @kayakMike1000
      @kayakMike1000 9 หลายเดือนก่อน +1

      @@nobodynoone2500 I think he started with that proviso

  • @johnwest7993
    @johnwest7993 9 หลายเดือนก่อน +61

    Now build 10 element beams for both ends. :)
    I've blanketed 1/3 of the USA with a 7 mW BPSK LowFER signal from my 30 foot tall antenna with 2 miles of hand-wound 22 gauge wire and a loading coil with 35 pounds of 8 gauge wire wound on a 3 foot diameter Styrofoam core, and I've been called crazy. But you have gone far beyond me. Well done, sir! I salute you! BTW, the most fun I've ever had was doing range tests. I drove 900 miles on I-80 across the USA watching my beacon message play on and on on the computer on the seat beside me. I smiled every inch of the way. Same sort of thing happened with my range tests with Hi-Fi audio sent via a dollar store laser, further and further, 6+ miles of smiling in the cold and dark with rain sprinkling down on me. I think we both know exactly how Marconi felt as his radios worked further, and further, and further.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +19

      The days of Marconi would have been a wild time time to be alive. But yeah, WSPR and other protocols would be pretty cool to explore like this.

    • @badgermcbadger1968
      @badgermcbadger1968 8 หลายเดือนก่อน +3

      That laser thing sounds really interesting

    • @scottdotjazzman
      @scottdotjazzman 8 หลายเดือนก่อน +2

      You realize the FCC prohibits LowFER antennas longer than 49ft, right? (Including the feed line)

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน +2

      @@scottdotjazzman is the load coil factored into that? It seems strange if it would be because you could just use a higher voltage higher impedance output and no load coil for the same output, right?

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน +2

      @tripplefives1402 still though. Can't you also use a transformer to change the impedance?

  • @Cydget
    @Cydget 9 หลายเดือนก่อน +39

    holy shit that's nuts. When you started talking about using reflections to get your desired carrier frequency my brain started expanding. I'm so shocked that you didnt run into any issues with this by nature of your antenna being a wire that was bent. I figured that any little change would greatly effect the outcome of the reflections, but I guess so long as the actual length of the wire is not changing, the reflections should still be there relatively unchanged. Also the idea to just add wireless connectivity to existing devices that we can hack was just brilliant. Lastly throughout the video I was thinking how it would be a cool project to draw vector graphics in the waterfall view like some people do with the xy plot on a scope and the last few seconds I see the outro graphic. Brilliant

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +16

      Expanding your brain is what I am here for. I love helping people grow and learn. The outro was something I thought of at the last second.

  • @nobodynoone2500
    @nobodynoone2500 9 หลายเดือนก่อน +55

    Bandpass filters make these kinda hacks easier, more effective, and more polite to those around you. Every radio hacker should have a pile of remade ones, a tunable one, and the know how to throw one together from scrap. It's a rare but useful superpower in the rf world.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +14

      I agree! This was just to get things working with minimal hardware, not getting things working well.

  • @applebroz222
    @applebroz222 9 หลายเดือนก่อน +6

    I rarely ever leave comments on TH-cam videos, in fact, this might be the first deliberate comment I've left in YEARS. But I had to because for more than half of the duration of this video I was sat at my desk with my jaw so widely open that it could have almost hit the desk. Thank you for this insanity, and for open sourcing your code - I learned a hell of a lot watching this video, and I'm sure I will learn even more from the repository. Unbelievable, outstanding work.

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน +2

      I'm really glad to have earned that comment then!

  • @utkua
    @utkua 9 หลายเดือนก่อน +22

    The projects excites me the most are things that are cheap and massively adapted, your stuff always hits the mark. This is a great work that enables people, you are a good human we are lucky we have people like you.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Those are definitely the things I find most compelling.

  • @edgeeffect
    @edgeeffect 9 หลายเดือนก่อน +32

    This is cool... basically you're bit-banging into the air!!! NICE!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +6

      That's a really good way to put it.

    • @ceeam
      @ceeam 8 หลายเดือนก่อน +4

      You saw the term "wave-banging" here first.

    • @edgeeffect
      @edgeeffect 8 หลายเดือนก่อน

      @@ceeam NICE!

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน +5

      @@ceeam gosh I wish that didn't sound as inappropriate.

  • @lelandolney
    @lelandolney 2 หลายเดือนก่อน +2

    Thanks!

    • @CNLohr
      @CNLohr  2 หลายเดือนก่อน

      Thanks for the support

  • @chrisalexthomas
    @chrisalexthomas 9 หลายเดือนก่อน +6

    Wow, this was amazing to watch. You did a fantastic job documenting all of this! Well done!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Thanks!

  • @Daniel.W.R.Rehman
    @Daniel.W.R.Rehman 8 หลายเดือนก่อน +2

    This video inspired me like very few videos do. Not only am I now way more interested in RF transmission and its theory, but now it all makes sense in a way it never has before. Thank you for gifting this beautiful project to the world!!!! You are amazing!

    • @CNLohr
      @CNLohr  2 วันที่ผ่านมา

      I'm really glad this inspired you. I just love the feeling of doing "impossible" things and seeing where they lead. Like over a long time I get an idea of what I think is possible and impossible. If I see a chink in the armor of impossibility, it drives me to see if I can open it up and find a whole new world of possible.

  • @quadmods
    @quadmods 9 หลายเดือนก่อน +15

    I learned more about LoRa from your video than many other ones. Great useful research. Cheers

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +4

      Thanks! I really tried to express the insights I gathered.

  • @autonoob
    @autonoob 9 หลายเดือนก่อน +12

    About 3min in and loving the way you bent the pin to see where the antenna plugs in, it probably secures it a bit better aswell. Genius! 👍

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +7

      I didn't expect anyone would notice that. I just did it so I could tell where it goes.

  • @davidpanic
    @davidpanic 9 หลายเดือนก่อน +20

    What an absolute madlad! And here I am just using cheap LoRa modules to send messages! I definitely got some inspiration from this.

    • @TheRainHarvester
      @TheRainHarvester 9 หลายเดือนก่อน +4

      What cheap. modules?
      How much are they?
      I bought an llcc68 module from cdebyte but i think they were defective. I could write to their spi registers and read them back, but could never broadcast (no signal ever showed up on a sdr receiver).
      Cdebyte world never send me sample code. So i used code from generic modules but either the modules were defective, or the code needed proprietary magic.

    • @davidpanic
      @davidpanic 9 หลายเดือนก่อน +4

      @@TheRainHarvester They're called "Ra-01 modules" and they go for about 3-4€ from china. I haven't had any issues with them and the range seems pretty good.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +10

      Doing it with modules is way better for everyone involved, this was more of a to-see-if-I-can.

  • @mikeselectricstuff
    @mikeselectricstuff 9 หลายเดือนก่อน +52

    So maybe for diversity you could put an antenna on multiple pins & transmit sequentially on each one?

    • @enthdegree
      @enthdegree 9 หลายเดือนก่อน +7

      Phase coherent output pins

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +2

      Probably, but would be trickier to figure out how to send the signal.

  • @xmine08
    @xmine08 9 หลายเดือนก่อน +9

    In recent days the TH-cam algorithm has giving me more and more smaller channels that are doing amazing things. You're part of that group, looking forward to more content from you my dude! Also, as a software engineer, RF is absolute black magic to me..

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +3

      I am also a software engineer. And I agree it feels like black magic at first, but then you get the hang of it.

  • @benedekt.5909
    @benedekt.5909 9 หลายเดือนก่อน +6

    Creative uses of aliasing in sampled systems, under-noisefloor communication and hacking ucs beyond their stated limits are the favourite topics of my supervisor from the university days. I will send him this video. Great work on this, must have been a bumpy ride. Congrats!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      BOY HOWDY WAS IT BUMPY, but it was steady process for all the weeks.

  • @scorch855
    @scorch855 9 หลายเดือนก่อน +7

    I'm normally quite put off by the thought of spurious emissions, even if they are very low power. But this has completely turned my conception of them on its head! Though I would be lying if I said I didn't spend half the video trying to think how I would filter it. Bravo!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +5

      If the thought of doing this without extra hardware wasn't so central to this video's thesis I would have totally added the filtering.

    • @JMurph2015
      @JMurph2015 8 หลายเดือนก่อน

      Literally just need a bandpass filter. There's no other way to do that reliably when you can't bit-bang about the Nyquist frequency.

  • @Britaliope
    @Britaliope หลายเดือนก่อน +1

    New way to implement a backdoor have just dropped x)
    Having a device connected only to a battery, without a radio ic nor antenna, being able to send packets over the air is mindblowing. Congrats for this achievement !

    • @CNLohr
      @CNLohr  5 วันที่ผ่านมา

      Thanks! Yeah, it did feel pretty crazy when it worked.

  • @vladimir0rus
    @vladimir0rus 9 หลายเดือนก่อน +3

    Amazing as always! You are inspiring so many engineers, thank you!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +3

      Thank you for your comment, too.

  • @L0615T1C
    @L0615T1C 9 หลายเดือนก่อน +2

    underrated video, needs 100x the views. this is some awesome stuff!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      You are doing your part! Liking subscribing, commenting and sharing makes that extra itty bitty bit of difference.

  • @bart8P
    @bart8P 9 หลายเดือนก่อน +3

    The most amazing engeering video I've seen the past year. Awesome!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +3

      Thanks. My other videos are envious

  • @tanmay______
    @tanmay______ 8 หลายเดือนก่อน +2

    this is just too insane for my brain to comprehend. major props to you sir

  • @geekswithfeet9137
    @geekswithfeet9137 9 หลายเดือนก่อน +102

    God damn, you just made the CIA’s wet dream of data ex filtration

    • @microcolonel
      @microcolonel 9 หลายเดือนก่อน +28

      Trust me, they are already doing it.

    • @Aurorajunior7321
      @Aurorajunior7321 8 หลายเดือนก่อน +11

      @@microcolonel have you seen seytonics video about using a SATA cable to do that

    • @microcolonel
      @microcolonel 8 หลายเดือนก่อน

      @@Aurorajunior7321 no but that seems highly doable. IIRC SATA is unshielded and that would make it easier.

    • @geekswithfeet9137
      @geekswithfeet9137 8 หลายเดือนก่อน +3

      @@microcolonel I don’t trust anyone that has to say trust me

    • @zekiz774
      @zekiz774 8 หลายเดือนก่อน +5

      ​@@geekswithfeet9137trust me: you don't trust anyone who starts their argument with "trust me"

  • @nThanksForAllTheFish
    @nThanksForAllTheFish 9 หลายเดือนก่อน +4

    So good to see you back!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      Only twice a year or so.

  • @hanmonic
    @hanmonic 9 หลายเดือนก่อน +4

    This is amazing. So glad the algorithm sent me this!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Glad to have you - hope I earned a sub.

  • @SebastianLang1998
    @SebastianLang1998 8 หลายเดือนก่อน

    Just one word: impressive!
    Really well done work - from the crazy idea at the beginning till this video for documentation.
    I'm fascinated! 🤯

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน +1

      Glad you liked it, I hope to keep making content like this (even if I am slow at doing it)

  • @EggCess
    @EggCess 9 หลายเดือนก่อน +5

    This is simultaneously crazy, ingenious, awe-inspiring, insane, impressive and scary.
    Considering the still rampant lack of security of large parts of the IoT Appliances market, this makes me shudder - *even* if parts aren’t connected (or connectable) to WiFi (or even worse, various WANs).
    Just wow.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      I somehow missed you watching these old videos. Good to see you here too even if it did take me a few months.

  • @adrianovianawerneck472
    @adrianovianawerneck472 8 หลายเดือนก่อน

    This is the most insane project I have seen lately. By the end of the video I was nutting with the range you manage to achieve just by bit banging the air.
    You are truly an RF Chad.

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน +1

      I'm glad you watched it all the way though. It's a balance giving away the punchline up front, verses making people wait til the end.

  • @The_Foxx
    @The_Foxx 9 หลายเดือนก่อน +117

    This video terrifies me

    • @DanielSMatthews
      @DanielSMatthews 9 หลายเดือนก่อน +42

      Me too in an "in complete awe" sort of way, and also because the implications of it are that a large amount of digital hardware can potentially leak data via LoRa packets induced in software and radiated off existing structures in the product. 🤯

    • @UKsystems
      @UKsystems 9 หลายเดือนก่อน +2

      @@DanielSMatthewsmost commercial products can’t as they are designed around emc requirements

    • @DanielSMatthews
      @DanielSMatthews 9 หลายเดือนก่อน +16

      @@UKsystems They are designed to pass tests when used as designed, change the code and they are out of spec and Tempest like tricks apply. Same with most of the attacks against air gapped computers, you need to be able to run code on them to get them to behave in unanticipated ways.

    • @andrewferguson6901
      @andrewferguson6901 9 หลายเดือนก่อน +1

      ​@@DanielSMatthews"can" = does

    • @UKsystems
      @UKsystems 9 หลายเดือนก่อน +1

      @@DanielSMatthews there are also tests for adverse use cases and checking for anything that can be used as an antenna or at least for ukca aprooval

  • @Versette
    @Versette 9 หลายเดือนก่อน +1

    This is absolutely crazy o.O
    I was thinking about something similar before, but it just stayed as an idea with no plan of how to actually make it
    And you somehow managed to do it!!! And with such a protocol too.. I wasn't even thinking of LoRa
    You earned a subscriber)

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      Thanks! You could totally use my stuff as a basis to get started with taking this even further!

  • @bearwolffish
    @bearwolffish 9 หลายเดือนก่อน +3

    Very cool, am reminded of an exercise from a wonderful book Make AVR, where the chapter on timers had you code an AM transmitter, by toggling the pins quickly using the compare registers.
    Love seeing the hype things like Meshtastic, LoRa, HackRF and Flipper Zero are bringing to these types of protocols.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      I wish this sort of RF radiation stuff was taught more, like in schools, etc.

  • @alitavana8336
    @alitavana8336 4 หลายเดือนก่อน

    Hey man. I really appreciate your videos. I truly believe that your channel is underrated. I'd personally love to hear more often from you re your projects, discoveries, ...

    • @CNLohr
      @CNLohr  4 หลายเดือนก่อน

      Thank you.. But it's hard to make time and space to make the videos over time.

  • @PimpinPoptart06
    @PimpinPoptart06 9 หลายเดือนก่อน +4

    Unbelievable dude. Well done

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Thanks

  • @maggieMakesMechs
    @maggieMakesMechs 9 หลายเดือนก่อน

    Only 5 minutes in and this energy is so inspirational. Thanks for getting me up and working on my projects (and for what I expect is going to be a great video)

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Keep goooing. Just go go go. That's the reason I want to make these videos is to point as an omen what can be done by just keeping on pushing on a problem until it gives way. Even though most of my projects do end up being failures, if you just keep pushing, keep pushing, you will find success.

  • @ryebis
    @ryebis 9 หลายเดือนก่อน +3

    "things that only have a tiny chance of success" time to join the Qowat Milat 🤣 Well done, worked better than I would've expected.

  • @VeniceInventors
    @VeniceInventors 8 หลายเดือนก่อน

    I'm not sure what is more impressive, the end result or your persistence to get there. In any case, the two made it a great inspiring video!

    • @CNLohr
      @CNLohr  2 วันที่ผ่านมา +1

      I appreciate the comment. And yeah, persistence is generally the hard part but it's also the good part.

  • @davidtiessen7713
    @davidtiessen7713 6 หลายเดือนก่อน +1

    So basically I didn't understand any of the techie stuff but I watched the whole video for the captivating "pirate radio" innovation. This smells of freedom.

    • @CNLohr
      @CNLohr  4 หลายเดือนก่อน +1

      I'm not sure how free it is, but I guess the FCC hasn't decided it's all that bad?

  • @pedroavex
    @pedroavex 9 หลายเดือนก่อน +3

    Have you checked the RPiTx project? The concept is similar, I have have already played with it to transmit Whisper signals in HF and my signal was spotted thousands of Km away, but of course based on ionospheric refraction. However you could use RPiTx concept to transmit Lora, i think they didn't do it yet.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      There's so many of these all around, and I haven't checked it out. I just don't do much dev with rpi.

  • @NicksStuff
    @NicksStuff 8 หลายเดือนก่อน +3

    This is incredible. Absolutely incredible.
    But now you need to receive the packets!

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน +2

      I'll leave that as an exercise of the viewer.

    • @msytdc1577
      @msytdc1577 8 หลายเดือนก่อน

      @@CNLohr /me purchases Mikrotik receiver as seen in video 👨‍🍳💋🤌🤘😁

    • @KirtikSoni
      @KirtikSoni 8 หลายเดือนก่อน +1

      lmao @@CNLohr

  • @lambda7652
    @lambda7652 9 หลายเดือนก่อน +6

    If you have VGA in your laptop you can probably do this without any extra hardware just by showing an image and with some xrandr magic.
    You could have shared effect that sends Loar

    • @andrewferguson6901
      @andrewferguson6901 9 หลายเดือนก่อน +1

      You're saying I could broadcast a chip tune of rickroll audio with a legitimate rickroll gif?

    • @lambda7652
      @lambda7652 9 หลายเดือนก่อน

      @@andrewferguson6901
      with the gif working is a bit harder...
      but search for "tempest for elise"

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +2

      I think VGA would be able to do this all incredibly well. But it's been a long time since I messed with it.

  • @theoldknowledge6778
    @theoldknowledge6778 9 หลายเดือนก่อน +2

    Dude, you are a wizard!!! Amazing video! Amazing research 👏🏻

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Thank you!

  • @TheRainHarvester
    @TheRainHarvester 9 หลายเดือนก่อน +42

    Lohr-A !

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +14

      How did this never come up!?

    • @davidwillmore
      @davidwillmore 9 หลายเดือนก่อน +5

      ​@@CNLohrI said it to you!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +4

      @@davidwillmore I just don't remember or maybe I Was too embarrassed?

  • @ShrirajHegde
    @ShrirajHegde 9 หลายเดือนก่อน +1

    Instant subscribe !
    Saw the title and knew this was going to be good

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      We went through a ton of different titles before we finally settled on this one.

  • @rs232boy
    @rs232boy 9 หลายเดือนก่อน +26

    Huge respect for making such limited hardware spit those radio signals. This is even one step beyond VUSB !
    Seems crazy to receive data under the noise floor, but the spreading for measly 3000 bits/s over a big bandwidth 125 kHz is what makes it possible.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      Indeed! And those bits are spread so broadly in time.

  • @TaiwoHY
    @TaiwoHY 8 หลายเดือนก่อน +2

    I danced a little when TH-cam recommended your new video. Dammn!!! You're crazy good. Now i gotta go back to hardware ❤

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน

      Software or hardware, it doesn't matter which as long as you keep going.

  • @m_riatik
    @m_riatik 9 หลายเดือนก่อน +20

    this is the purest definition of knowing how to break all the rules

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +10

      You can't break rules when there aren't any.

  • @electgpl
    @electgpl 9 หลายเดือนก่อน +2

    Good video, it is a method used in radio frequency to obtain high frequencies from a stable time base of a lower frequency, the idea is to use overtone and filter the output so that it only delivers the corresponding harmonic. It is used a lot. Maybe if you add a bandpass filter and an amplifier you could have an interesting device. Regards from Argentina!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      A bandpass or maybe a class c would certainly help

  • @alphapuggle
    @alphapuggle 9 หลายเดือนก่อน +4

    Great, now devices that I previously thought were completely disconnected from the Internet can leak my data

    • @talinpeacy7222
      @talinpeacy7222 7 หลายเดือนก่อน

      Active defense will always be more effective than passive defense. Guess you need to invest in a jammer equivalent.

  • @BalticLab
    @BalticLab 7 หลายเดือนก่อน

    16:50 That's because Nyquist ist always explained incorrectly, even in academic literature. The original theorem clearly says "bandlimited signal" meaning bandwidth and included different Nyquist-zones that can be used for sub-Nyquist sampling. The only condition is that the bandwidth of the generated or sampled signal is smaller than fs/2. And many people don't seem to understand this.

    • @CNLohr
      @CNLohr  2 วันที่ผ่านมา

      I mean clearly it is misexplained, but it's still so hard to explain it in a way that gets the point across and is still right. I feel like only after playing with it over a long time have I begun to grok it.

  • @AntonMadness
    @AntonMadness 9 หลายเดือนก่อน +4

    This reminds me of the PiFMplay, which is also magically awesome. It uses an raspberry pi to sent FM radio in to the ether. Just attach a wire to the board on 1/2 labda or something and you're good to go x-D

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +2

      There's so many GPIO projects, I just enjoyed bringing another one to light.

  • @freedtmg16
    @freedtmg16 9 หลายเดือนก่อน

    This is one of the coolest things I've ever seen! Lora is one hell of a protocol, and you are one hell of a hardware hacker!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      thank you

  • @Bp1033
    @Bp1033 9 หลายเดือนก่อน +3

    Interesting how much of this I already knew from playing with audio. Rf and audio has a lot of overlap.

    • @nobodynoone2500
      @nobodynoone2500 9 หลายเดือนก่อน +1

      It's all wave theory. You will be suprised to see that other energy like light can be approached in a very similar way.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      Indeed. There's so many parts of the way our universe work that are all so interconnected.

  • @ChrisPrefect
    @ChrisPrefect 9 หลายเดือนก่อน +2

    LoRa is amazing. We did a range test with TBS Crossfire LoRa TX and RX and managed 23 km with 10mW on a drone.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      10kW on a drone what?

    • @ChrisPrefect
      @ChrisPrefect 9 หลายเดือนก่อน +1

      @@CNLohr damn, *mW 😅

    • @ChrisPrefect
      @ChrisPrefect 9 หลายเดือนก่อน

      @@CNLohr 100km test th-cam.com/video/ULVwMSL5xac/w-d-xo.htmlsi=wzknpe34vWhc4tGc

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      @@ChrisPrefect Whew. That's more like it. I'm surprised there's such a discrepancy. I'm putting out such little power, and yet it still somehow goes pretty far. 10mW is a LOT more power than even my EIRP.

  • @runforitman
    @runforitman 9 หลายเดือนก่อน +14

    man LoRa is an insane protocol

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      IKR!

  • @RainDownpours
    @RainDownpours 8 หลายเดือนก่อน

    I'd just subscribed from all your past videos that you mentioned here. So many interesting videos!

    • @RainDownpours
      @RainDownpours 8 หลายเดือนก่อน

      OMG! You were the guy who broadcasted NTSC with ESP!!

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน

      Indeed... I have a lot of videos on NTSC

  • @xtalviper
    @xtalviper 9 หลายเดือนก่อน +8

    GPIO pin: "So anyway, I started blasting..."

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Make a meme!

  • @nschurando
    @nschurando 9 หลายเดือนก่อน

    Awesome work. Your dedication to pursuing the unlikely is an inspiration.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Inspiration is the goal - get people to realize what they can do if they apply themselves

  • @chaemelion
    @chaemelion 9 หลายเดือนก่อน +4

    This scares me. I frequently consider how a state actor might exfiltrate data via compromised hardware/firmware. I had always reassured myself that they would never send it over the wire/air because of the risk that it would be detected with traditional network infrastructure monitoring. I also reassure myself that bit-banging something out over a funtenna to other compromised devices acting as relays would require so many compromised devices that they'd risk being discovered. But I hadn't considered LoRa... The infrastructure already exists, gateways are popping up everywhere, it operates far below the noise floor... Do you have any idea how easy it would be to exfiltrate private keys using malicious firmware or even silicon? A crypto co-processor? Hmm... maybe that thought deserves a PoC...

    • @landspide
      @landspide 9 หลายเดือนก่อน +1

      I think this is already being used...

    • @nobodynoone2500
      @nobodynoone2500 9 หลายเดือนก่อน

      This tech has been used by state actors for about 40 years. Do with that what you will.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      There's so many other scarier things in the world. Don't worry about this stuff.

  • @mt-qc2qh
    @mt-qc2qh 9 หลายเดือนก่อน

    I am completely blown away by you knowledge and methods of engineering. Charles, you are a true wonder or out-of-the box engineering.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      Tear down those barriers between disciplines. We weren't meant to live in little boxes.

  • @icantseethis
    @icantseethis 9 หลายเดือนก่อน +22

    This bro about to learn why the FCC is a 3-letter agency

    • @ryshellso526
      @ryshellso526 8 หลายเดือนก่อน +1

      Lora has already been approved for communication on... go stroke an old boomer HAM operator off...

    • @ergonomiczero2228
      @ergonomiczero2228 8 หลายเดือนก่อน

      But most of use 4 letter words to describe them

  • @raguaviva
    @raguaviva 9 หลายเดือนก่อน +1

    This is the hack of the decade, awesome video. Thanks for sharing!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      Thanks!

  • @garry5280
    @garry5280 9 หลายเดือนก่อน +5

    I'm guessing it wont pass FCC limits 😂 incredible work.

    • @kreuner11
      @kreuner11 9 หลายเดือนก่อน +4

      Later in the video he actually makes it have very little extra noise outside of the desire frequency which is interesting

    • @nobodynoone2500
      @nobodynoone2500 9 หลายเดือนก่อน +2

      make a lil bandpass. a bit of loss is worth the better signal imho.

    • @lo2740
      @lo2740 9 หลายเดือนก่อน +1

      @@nobodynoone2500 it will require a SAW filter plus a class C amp to produce a decent RF output (in term of regulations), but i fear the side products of the class C will require one more SAW (not cheap) and still be too problematic, another way would be using the fundamental and a mixer, but the BOM cost will be too high. There is some cheap RF chips with registers access which could be torn to emulate LoRa TX properly (we did that at the time of sigfox in DBPSK), however a radio without RX isnt very useful.
      Small MCUs are capable of demodulating and decoding a 868/900MHz signal by using their fast ADC, a mixer and a 800KHz IF but again given the low price of an LLCC68 this would probably be a futile exercise (i did that for a mini sigfox basestation few years ago, using an STM32F4).

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +4

      It's such a small amount of power it just might. But a SAW+Class C would be hoppin!

  • @NoOneFPV
    @NoOneFPV 8 หลายเดือนก่อน

    Your results are truly amazing. Bravo!

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน

      Thanks!

  • @oscareriksson9414
    @oscareriksson9414 9 หลายเดือนก่อน +3

    69.420 mhz! Sounds nice...😊

  • @benroberts127
    @benroberts127 8 หลายเดือนก่อน

    This is an amazing project, LoRa has ingruiged me for some time, but to see this kind of a deep dive into it was very cool. I only wish I had the technical skills to attempt things like this! Very impressive.

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน

      I hope this filled in a lot of the spooky unknowns with LoRa.

  • @jakob5481
    @jakob5481 9 หลายเดือนก่อน +4

    Next step: make a receiver

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      Oof. Too soon.

  • @scottieburr
    @scottieburr 9 หลายเดือนก่อน

    you are a god. I whish I had an attention span as "short" as yours!! :D thanks for the effort you put in.

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน

      It does take some discipline to quiet the more spongy things in our lives, like social media scrolling and YT shorts, but if you reject the petty fluff, it makes it a lot easier for even limited focus to develop. Sadly, I don't know if I'll ever fully recover from what facebook and instagram had done to my brain.

  • @nolan412
    @nolan412 9 หลายเดือนก่อน +4

    Data exfiltration by gpio sounds scary now.

    • @nobodynoone2500
      @nobodynoone2500 9 หลายเดือนก่อน +3

      It's not exacxtly unheard of in the hacking world. There was a rather famous use about 25-30 years ago.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +3

      It is pretty common nowdays, with several different air-gap techniques

    • @nolan412
      @nolan412 9 หลายเดือนก่อน

      @@CNLohr Now a 1000 meters away. Balloon heights!

  • @sinitarium
    @sinitarium 8 หลายเดือนก่อน

    INSANE! I will have to replicate it to believe...
    Amazing video, thank you very much!
    I learned tons in this video I will have to watch multiple time. Glad I found your channel!

    • @CNLohr
      @CNLohr  2 วันที่ผ่านมา

      If you encounter any issues with reproducing it, probably best to ask questions on the Discord. The github isn't the easiest to get support in.

  • @P3RV-3
    @P3RV-3 9 หลายเดือนก่อน +7

    69.420mhz lmfao

  • @adreto2978
    @adreto2978 8 หลายเดือนก่อน

    I just checked out your IDF-Sandbox repo and it’s the best thing ever thanks mate

    • @CNLohr
      @CNLohr  2 วันที่ผ่านมา

      Thanks. I'm glad someone else is getting some use for it.

  • @sensorer
    @sensorer 9 หลายเดือนก่อน +3

    Love seeing Nyquist in the wild

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      Or not seeing Nyquist in the wild. 🪄🪄🪄

  • @jlog7395
    @jlog7395 6 หลายเดือนก่อน

    This was an amazing project and you are a brilliant engineer. You mentioned your dad was a “true EE” so I assume you are not one. I have a MSEE and worked in the RF industry. Let me tell you sir that you would outshine most all of the engineers I’ve ever worked with. I cannot recommend enough for you to get your EE degree - it would be a breeze for you. Our country needs brilliant engineers like you!!!

    • @CNLohr
      @CNLohr  4 หลายเดือนก่อน

      Thank you. And no, I did get a undergrad in computer engineering, but masters in CS, and have been working primarily as a software engineer for many years.

  • @NoorquackerInd
    @NoorquackerInd 9 หลายเดือนก่อน +6

    This is absolutely scary for IoT, imagine someone hacking into your freaking toaster and making a funtenna open your garage door

    • @kreuner11
      @kreuner11 9 หลายเดือนก่อน

      Ok, you'd have to be a fucking FSB agent to have that happen to you, there are much more psychical and easier ways

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      But I want my garage door to open 8 minutes after my toast pops up...

  • @theball1
    @theball1 9 หลายเดือนก่อน

    Congratulations, one of the best things I've seen in a while!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Thanks!

  • @binh_enjoys_life
    @binh_enjoys_life 58 นาทีที่ผ่านมา

    This is the definition of crazy, I learned so much!

  • @rallokkcaz
    @rallokkcaz 9 หลายเดือนก่อน +1

    This is such a cool project and video. Thanks for sharing such awesome and insightful content!!!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Thank you for the comment!

  • @Markfps
    @Markfps 9 หลายเดือนก่อน +1

    OH my god he's back!!! What an amazing discovery, incredible how hardware is able to do things thought impossible if one has enough motivation. And what a great protocol LoRa is. ESPs have no business being as good as they are, what a great invention.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      I'm glad to be back, but I'm only here long enough to scurry away again. I think releasing only about 2 videos a year is going to stay my new norm.

    • @Markfps
      @Markfps 9 หลายเดือนก่อน

      Whatever you need man, as long as you're happy! These things take time, the community will support you in any way.
      Besides, you're already more consistent than some movie studios and your content is always interesting.
      This or some other project really, could be a great exhibition at OpenSauce

  • @pwarrow8858
    @pwarrow8858 9 หลายเดือนก่อน

    This is absurd. In a good way. You are inasane. I am properly impressed. Great work !

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +1

      Thanks!

  • @PeterA650
    @PeterA650 7 หลายเดือนก่อน +1

    This is freaking awesome. You can essentially create the baseband using a cheap micro + 900MHz SAW + gain block.
    BTW, it's "megacycles" not "megasamples".

    • @CNLohr
      @CNLohr  4 หลายเดือนก่อน

      SAW? Gain block?

  • @maxlee3536
    @maxlee3536 7 หลายเดือนก่อน

    You CMAC code is chef's kiss! Thanks man!

    • @CNLohr
      @CNLohr  4 หลายเดือนก่อน

      Thanks, yeah, I couldn't find any when I started so I was like "no one else will have to suffer the same fate as me."

  • @GudinVladimir
    @GudinVladimir 9 หลายเดือนก่อน

    Wow! Absolutely fantastic video! And so unexpectedly large transmission distance! Thanks a lot for your work!

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      Thank you for your comment.

  • @anispinner
    @anispinner 8 หลายเดือนก่อน

    The video itself has to be nominated for The Most Entertaining Movie in 2024 award.
    Thank you, Charles, for your groundbreaking work.

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน

      We'll see how far it goes. The video's already done better than I expected.

  • @liammccarthy2651
    @liammccarthy2651 9 หลายเดือนก่อน +1

    So impressive, I knew this was going to be a wild ride when you said the best square wave frequency you could achieve was 69.420MHz

  • @xTHETRINCHOx
    @xTHETRINCHOx 8 หลายเดือนก่อน +2

    Oh...so maybe we can LORA the esp32 s3 cardputer!

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน +1

      The S3 doesn't have an APPL :(

  • @ksmith7122
    @ksmith7122 8 หลายเดือนก่อน

    Thank you. I didn't really know about Lora until now. Having watched this. It's clear that the only thing slowing down adoption is knowing it's benefits and it being proprietary.
    Optical Fibre transmission chirps over long distance transmission, and subsea regen reshapes chirped signals before they lose too much shape. I never thought chirping was beneficial before now. ID'ing a signal by the chirp I'm sure has been considered previously.
    Being able to pull the signal out at femto watts at a few km is going to create many many IoT applications where routing a wire or reinforced concrete radio blocking is an issue.
    This was very instructive.
    Thank you.
    Now all that's needed is a non proprietary version.

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน

      I'm glad you liked it. To note - one of the major benefits of LoRa is you can get silicon to easily send/receive packets. So, while proprietary, it means we get chips.

  • @Silentragetrolling
    @Silentragetrolling 8 หลายเดือนก่อน +1

    So glad you dropped new content plz.plz plz make more on RF world make a series breaking down everything including buidling setups or flashing processes coding etc.

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน +1

      I generally only make videos when I do projects and they turn out well. A do typically 5-10 BIG projects per year, some are success some are failures, but I only want to spend the time on the real gems to make a video for them.

    • @Silentragetrolling
      @Silentragetrolling 8 หลายเดือนก่อน

      @@CNLohr thank you for your time and energy spent. I will continue to learn from you salute.

  • @BeckyDBlack
    @BeckyDBlack 9 หลายเดือนก่อน

    YOU DESERVE 1 MILLIION SUBSCRIBERS!!!!!! AMAZING VIDEO WTF, IM TELLING MY BOSS

  • @TobyJackson
    @TobyJackson 9 หลายเดือนก่อน +2

    Amazing story. The engineering makes no sense to me, but explained in such a way that I could come with you on the journey. Really makes me wonder what the 3-letter-agencies are able to achieve with funtennas.

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน +3

      There's already a lot of papers about all sorts of things average researchers are able to achieve with them.

  • @svampebob007
    @svampebob007 9 หลายเดือนก่อน +1

    14:00 aaand I'm lost
    I understand the concept but at some point I was just listening not understanding 😅

    • @CNLohr
      @CNLohr  9 หลายเดือนก่อน

      I hope you were able to keep picking things up here and there so you could learn about the topics elsewhere. I try to make my content so it has pretty good re-playability, i.e. rewatching a few weeks months or years later.

  • @kebman
    @kebman 8 หลายเดือนก่อน

    5:06 Listening test: Sine Wave, Square Wave & Low Frequency. Suppose you can root out harmonics using Fourier analysis with the waves you get on the oscilloscope.

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน

      I'm not sure what you are proposing

    • @kebman
      @kebman 8 หลายเดือนก่อน

      @@CNLohr You can add up certain harmonics to create other harmonics. Or you can decipher and isolate the frequencies that you need.

    • @CNLohr
      @CNLohr  8 หลายเดือนก่อน

      @@kebman Sorry I guess I don't really understand the specifics of what you are going for, yes, the harmonics can add up and subtract and move around, but I don't quite know what you are going for.

    • @kebman
      @kebman 8 หลายเดือนก่อน

      @@CNLohr Experiment and ye shall discover :)

  • @alelondon23
    @alelondon23 9 หลายเดือนก่อน +2

    you are a freaking stubborn genius!