Software Defined Radio with HackRF by Michael Ossmann, Lesson 1 

Thank you so much for sharing your knowledge! It’s insane that this content is available for free…

Thank you so much for your wonderful course, Michael! It is truly amazing.

Got my Hackrf One today and now I can slide through radio channels already :) Thank you so much

wow Sweet The "Man" giving out free knowledge. Just started with an SDR, and will move up to a Hack RF. A fun tool for teaching my grandkids. Thank you.

Thanks for sharing such valuable material. I can finally find some comprehensible support for learning gnuradio. Thanks again!

Great start to a course. Thank you for sharing!

Out of the gate I am a straight up newbie ... in SDR. I cannot afford a HackRF yet, so I bought a genuine RTL-SDR Blog V3 R860 RTL2832U 1PPM TCXO HF Bias Tee SMA Software Defined Radio with Dipole Antenna Kit to get started with. I am going to have to rewatch this first video to pick up on important links I missed my first time watching it; I am at my workbench and get interrupted often so this weekend I'll watch again and take good notes. It is well done; you have a pleasant listening voice and make complex theory seem more palatable for viewers such as myself. Thank you very much and I look forward to getting my dongle and getting started.

Amazing video. 24 hours ago I had never heard of SDR or HackRF, and right now I can listen to a radio signal I'm decoding with a clever bit of software and by watching one video! I'm ready to dive into video 2, I tried to add a second audio signal, but to my surprise there is only one FM signal strong enough (or I only thought I figured it out).

Thank you so much for this gift to the world! I'm blown away that this is free!

Well... This is most fun I've ever had tuning-in to BBC Radio 1, including improvising antenna from piece of wire since I somehow did not order any antennas.

Hi Michael, Thank you for putting these instruction videos together.

I just ordered my hackrf, can’t wait to start

I feel like this information being public should be illegal! But really, this is fantastic, thank you!

how has this only got 94 likes? It's AWESOME!

Ordered a hackRF, watching this while waiting for it to arrive. GNU radio companion looks a lot like FBD or to a lesser extent ladder logic, I feel like I'll enjoy this more than textual programming.

you are a godsend to the cybersec community

Thanks so much. Just started.

Awesome video. Just bought one of your HackRF One's (in Australia). Took me an hour to work through this lesson :-) I found the new menu structure slightly confusing (especially at 8:50) , and the disappearance of the WX function (10:09). But I got it working using the QT GUI Sink, so delighted that I completed lesson one. GNU Radio 3.10.2.0 running on Win 11. The Windows firewall threw up some strange errors that took a while to resolve as well. But enjoying success on Day 1. Have not found any beginners guide to the new QT modules which will slow me down. Thank you very much.

Thank you very much for the great series. I learned a lot but I do not really understand the difference between center frequency and Channel frequency here. Could Somebody please help me out?

thank you so much for this video , but i have a quistion . how we make a low pass filter on 75 khz while the osmocom working on 97.9 mhz ?

it works!!!!!thank you a lot!!!

Are there any particular operating system requirment limitations? So I can get my homework done.

Thank you for the video. Not very clear why we need cos signal to multiply by. This is some signal processing trick that I think needs more explanation. Also, for those who don't have the hardware just yet, a recorded source would be nice to play with.

Do you ever plan on updating the lessons? Just curious. Its fun to watch, but I would love to follow along. There seems to be a few setting changes, and I am not having any luck getting mine to work. I do appreciate the work you have already put into this!

Thank you for this video... I am trying to capture LoRa signal at 868.1 MHz. But What I recieve is only downchirps in time domain. Ideally I should be able see preamble upchirps. what can be the issue.... Note: If I add 125 KHz to 868.1 MHz ... it shows the upchirps however the signal is not center at 0 which makes sense. but with 868.1 MHz the signal is not center at the capture frequency it is centered at 868.1 MHz - 125 Khz... what could be the reason...?

solid, thank you

Thank you!

First of all thank you so much for uploading these tutorials and sharing your knowledge. I followed this tutorial step by step but only get a noisy audio output when executing the flow graph. I've tried tuning into local stations as well as going through with a slider though various fm radio stations but I'm just getting a noisy output with everything. I'm using the ANT500 antenna and have read online that there could be a possible issue with this, have you heard of such things before? Thanks

I gotten a hackrf since 2012....finally getting to mess with it nowadays.

Dear Michael, Thank you very much for such a detailed sessions on HackRF One. Its very insight full. I have a question. Have you or anyone in this group tried installing Open5Gs using HackRF One? If so can you please share your experience. Thank you!!

THANK YOU

Thank you. How did you come up with an interpolation of 12 and decimation of 5?

Does the gain make anyone else's audio very distorted? EDIT: I think my virtual machine was just low on resources... I tried with a beefier VM and things worked better.

damn. I need to start using exponents more in my code

You can also setup a linux distro through WSL2 these days if you're running windows.

I have been trying and got the qt gui one but when I try to hear it all I get is static could one of my variables be wrong?

Hello. The PENTOO iso image from where you recommend downloading is available without a dektop environment. only command line works. I'm not an expert in Linux and I can't navigate this environment that lacks a graphical environment. Maybe you can suggest where or where to download the PENTOO iso image with a ready-made graphical environment? as I mentioned before, I'm not an expert in Linux and I can't install the graphical environment to what is available on the PENTOO author's website.

I have questions about center_freq and channel_freq - the way you implemented this, the osmocom_source output must contain all frequencies in the fm band? Can you show an example where you explicitly set the osmocom_source to frequency of interest. Can you provide a similar example for AM demod, or share what needs to be changed with this flowgraph? Thanks!

This video series no longer applies to new version of GNU Radio Companion

Hi, I'm very, very new to the world of SDR's, most programing (assembly/machine language I understand better than any of the higher level languages and did learn and use very basic, BASIC {long time ago} which gives my age away) So I'm basically new to all of this. I was able to, pretty much, keep up with the info in the video except the 1st "multiply", what & why it seems to multiply (it has the subtract instruction in it) and why it seems to output to the disabled "sink" and to the "filter" and not the enabled "sink"? I've only watched the video once and haven't looked at the webpage for lesson 1 yet so there's no need to answer but I may refer back to this comment later. I'm also going to be new to Linux. I installed and tried Ubuntu about, idk maybe 20 years ago (it had multiple desktops displayed kind of like a 3D cube that you rotated around. its hard to remember but it was cool looking) It was buggy and I gave up on it. I've been wanting to try it again and know I should of. In any case, Im curious if I can use Hi, I'm very, very new to the world of SDR's, most programing (assembly/machine language I understand better than any of the higher level languages and BASIC {long time ago} which gives my age away) So I'm basically new to all of this. I was able to, pretty much, keep up with the info in the video except the 1st "multiply", what & why it seems to multiply (it has the subtract instruction in it) and why it seems to output to the disabled "sink" and to the "filter" and not the enabled "sink"? I've only watched the video once and haven't looked at the webpage for lesson 1 yet so there's no need to answer but I may refer back to this comment later. I'm also going to be new to Linux. I installed and tried Ubuntu about, idk maybe 20 years ago (it had multiple desktops displayed kind of like a 3D cube that you rotated around. its hard to remember but it was cool looking) It was buggy and I gave up on it. I've been wanting to try it again and know I should of but just instead of Pentoo?, guess I'll. try both. Thank you very much for the information and videos what ive seen so far is great.

How well is the raspberry pi4 b supported? I have the 8gb version. This is an awesome project! 👍

Multiplying a cosine signal with a given signal x should shift the frequencies of x to both sides, hence giving two peaks. But why do I see only one in the FFT plot? Also, the low pass filter cut-off is kept at 75kHz which is below the required channel frequency. Why has it not been kept above the required channel frequency?

Hello Sir, I am using HackRF and GNU radio. I have drawn the FM receiver by using your tutorial and it is working. Now I am trying to transmit one txt file from one system which connected to HackRF 1 and other receiving this file from another system connected with HackRF 2. So I created two flowgraph for it . But when I am trying to transmit txt file at particular centre frequency, it is transmitting. But in receiving side I am getting signal at same frequency in distorted form and some DC offset spike as well. So I am stuck in this problem and tried a lot. So, please help me, if possible, can we connect through email, or other social platforms? I need your help on it.

I installed GNU Radio Companion 3.7, but I do not see the Osmocom Source, I'm not really sure how to install it.

great presentation but where can we find the next lessons?

Hi Michael, the link on the page for lesson 1 under Homework item 1 (Getting Started with HackRF and GNU Radio) gives a 404 error.

What components of gr-osmosdr do I need to enable?

Could you guide about generate Sirius XM radio signal by HackRF One. I tried to search but couldn't found any solution

Is it going to work with USRP 205 Mini- i?

Hey, I had a problem with the version you are using in the video & the version used today. It kind of held me up from moving forward...

Hi there, Ime in the UK & i have come into posession of one of these mashines but ive abssolutly no idea what it doess or even the termionoligy used thru most of youre video. I come from an oldschool ham radio background but never was an advanced user of those systems, i just maintained my own little base station for coms in the country as i live very remote. Do you have a videos for dummys on this mashine that literally starts from scratch explaining what it is & how it does things & some basic out the box use. Ime finding every video ive seen so far i do not in any way understand. My expertise is as a live audio engineer so ime feeling a tad out of my depth with this. I got the mashine becuese i wanted to be able to listen in on whats out there radio wise & may be respond one day when i know enough about what ime doing if that day ever comes. I cant help but feel like a gibbon with a g*n at present & ime starting to wonder why i bought it haha

Is there a way to implement ubertooth one into a sdr hardware?

great explanations! its just a shame your using WX as its unavailable/outdated now and been replaced by QT! Any tutorials on QT modules would be great for beginners like myself!

Can anyone help me. I have a carrier that sits exactly on my center frequency. And if I change the center frequency it follows. Any ideas?

nice

Unfortunately this tutorial is now hopelessly outdated following the GNU update.

how to find source>osmocom ?

gnuradio doesn't even want to run on latest kali, so frustrating...

most complicated and hardest "hello world" in the world ;] and it's not working. Don't know tried to change variables only static noise.. Should be radio stations on that freq. But hear nothing maybe my hackrf is broken.

My comments with hints about getting this demo to work under Linux Mint 21.2 keep getting deleted by our overlords. Interesting.

What a pity others are copying this video.

Why are you using WX which has been discontinued now for 10+ years. It doesn't exist making what could be a great tutorial useless. Please try again using something that we can use like QT.

by 14.04.2024 is somehow outdated, no osmocom in gnu-radio companion

I can't for the life of me get osmosdr to work in Ubuntu. Keep getting some spdlogConfig.cmake error, Oh well, doesn't work