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

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

"That final output is 69.420 MHz" Nice.

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”

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

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

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

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.

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

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

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

This video terrifies me

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

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

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

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.

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.

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.

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

Lohr-A !

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

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

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!

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! 👍

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

man LoRa is an insane protocol

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

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!

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!

I rarely ever leave comments on UKposts 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.

Your results are truly amazing. Bravo!

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

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!

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.

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)

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

So good to see you back!

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

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.

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

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.

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

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

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!

In recent days the UKposts 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..

Unbelievable dude. Well done

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

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

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

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

To help you on your journey. Eric Bogatin - There are those who intentionally make antennas, And those who aren't. Rick Hartley - Every trace needs a ground return plane or ground return path. Rise in full-time is what creates the frequency Not the frequency that you request from the micro controller

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

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

69.420 mhz! Sounds nice...😊

That's incredible work!! Thank you!

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.

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

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.

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

That is some clever stuff, aliasing all around and using harmonics to get signals out, beautiful

Next step: make a receiver

Data exfiltration by gpio sounds scary now.

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

This opens so many opportunities. Thanks dude

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...

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

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

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

Love seeing Nyquist in the wild

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

Thanks for this, I never knew that LoRA was actually a *closed* standard/protocol!

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)

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

Nice. Thank you for your hard work and proof of operation.

It's really all about the performance of the receiver. I agree that constraints drives creativity. Being able to generate the LoRa protocol from a simple controller is very, very clever. Also, the emissions from a digital signal is a function of the rise and fall times as well as the period. The sharper the edges, the stronger the harmonics.

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

i subscribed immediately, amazing video.

I'm in awe. Thank you!

Incredible as always!

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

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

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!

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

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

Phenomenal work!

nice work & well put together video/upload .

Ohh bio at last 😂😂had to wait so long to get to see some of your interesting stuffs

you are a freaking stubborn genius!

Legend.

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

👍😀 Amazing work 👏

It's a serious big brain energy here! Subscribed!

dude you are freaking incredible :O

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

Incredible!

Absolutely amazing stuff as always, here's hoping we eventually get that video on esp32-s2 overclocking. Knowing how cagey Espressif gets about that sort of thing it would be incredibly funny (and hopefully useful!!!) to have a chip running at more than twice the clock of their announced "High Performance" P4 (400MHZ)

great job!

Amazing!

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.

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