Wow, amazing tutorial! Connected so many dots for me in like 30 minutes. You are a talented communicator and instructor. Please keep posting new content. I would love to see what else you are working on.

Stuart, you're famous! Hackaday not only covered you on their website but spoke about this tutorial on their podcast as well. And the best part is, I actually learnt something new! Thanks for sharing!

I just watched all 3 parts and wanted to thank you for taking the time to put together a tutorial. Simple, to the point, and with a concrete example.

I needed a quick overview of reverse engineering BTLE that i could listen to in the background to judge the feasiability of a project and this 3-parter was very easy to follow even when i couldn't watch it.

Great series, congrats on getting featured on hackaday!!

I enjoyed your series, thank you. I use an ESP32 as an infra red remote control for my TV and settopbox. I expect that future remote controls will make use of Bluetooth instead of IR. That is where your sniffer will come in handy, to make my ESP32 even smarter than it already is. Regards, Peter.

This is great. Was looking for an embedded C project and I was thrilled to come across this!

I appreciate your video series so much! It came just in time for where I am with my learning. I just bought the NRF sniffer yesterday and have some adafruit BLE to play with. I am trying to study a BLE heartrate monitor I have and then build one from parts, so your guide was right on target.

Very interesting subject and detailed explanation in the series.

Very informative. Thanks for making this video, and series.

Hi Stuart, I just discovered your 3-part video on this topic and I like it very much. You explained it very well in a simple, easy to understand way. This triggered my interest to explore and experiment on this topic further. Thanks for catalyzing my interest!

Very nice! I've been trying to figure out how to get the data from a temperature/humidity/pressure sensor and this finally answers my questions. As for what to do with that light, I haven't been doing anything with it, but the "obvious" answer is to have the light color reflect the price of bitcoin; dojo or whatever Elon Musk is promoting.

Thanks a lot for the tutorials !! For a newbie in BT comms like me gave me a lot of help. Was incredibly useful to implement some message sending I needed in Android and APP Inventor.

I'm late to the party, but thank you so much for taking the time to make these

Really great stuff!

Thank you very much for this video sir. It helped for my project

Great video. Very helpful.

Thanks for walking thru the code: I've got an esp32 node mcu board I've never really used for much, but I've done ble on nrf52 chips, with both the Adafruit and Arduino c++ bsp, as well as the Adafruit CircuitPython Bluetooth LE stuff. The esp32 api as wrapped in the Arduino support looks pretty straightforward. I'm likely to get one of these and get it connected in to mqtt so I can easily control it via node red, which is how I do all my smart home stuff.

thanks for the video, learned a lot!

Today I learned something new as a software developer. So happy and so glad that you shared this. I am really looking forward for applying this on a cheap drone bought from amazon that is controller through an app. I really would like to test If I can do the same

Thank you very much for this videos, are really interesting.

Thank you for this video series. Imna try and capture and graph pulse and spO2 data from wellue devices (on an Arm linux box).

Interesting. I'm similar age to you and only just getting back onto microcontrollers after a long hiatus filled with 3D printing design, hydrofoil design etc. I've been collecting up different ESP32 variants including S2 and C3 models, SEEDUINO variants etc. As the ESP32-C3 is supposed to be Bluetooth 5 with BLE and one of my projects is to make an RC hydrofoil boat, I'm experimenting with that first. I've had ESP-NOW working on the C3s but I only get around 200m line of sight which is still impressive but not BLE worthy. I've experimented with the nRF app too, it's great, though you've reminded me that encrypting the values passed by the characteristics are important in any commercial product. It's a little slow going as only hobby work, had to upgrade my laptop to speed the edit/download/test cycle, I was feeling pretty dumb waiting 5 to 10 minutes on the previous laptop. But now I see progress, get things working and it's great. Re applying your reverse engineering, I think it would be more impressive with a bunch of those lights. You could locate them as pixels in a pattern and then flow colours through them with sinewaves applied to your RGB components and apply to a ESP32 held map with pattern positioning properties for each light. 3D if you were to get a sponsor for a large display.

I'm very grateful for this series!!! I have never done anything with BLE before now. About to order an nRF52840 dongle. Thank you!!! Would you mind also posting (or providing the source of) the supposed-to-be-like-this example? By the way, I'm here because I heard about the videos on the hackaday podcast.

Super informative, unfortunately it seems like the dongle you picked up I can't easily find (I'm in Canada). He'll I'll order something similar and give it a shot for my specific application. Thank you for the tutorial!

THis was a great tutorial, thank you. One question - I'm trying to emulate a BT remote for an Android set top box. Is there a way to do this if they are using LTK?

This is a fantastic series and I am using it to teach a class. How would this work if I were to do this on a raspberry pi(master)?

Thank you for this great lesson. Wondering if you could point me in the right direction for a little project i am working on. I completely understand the sniffing and reverse engineering of the data, and the code you have for the rgb randomiser. I just need a little help with sending a simple on / off command, or taking from the example you have, sending a command to turn the light on using its last setting and turning it off. thank you in advance

This is just FLAWLESS. Thank you so much for creating and sharing this with us. I was wondering if this is possible (and how): - Can I connect the nRF dongle/module/etc to an ESP32 and capture the BT/BLE traffic directly from my ESP32 board (or maybe with a Raspberry Pi)? (but not using a PC) Thank you!!

Thanks for the video, it was grate. I'm looking for the way to connect esp to my IPhone and all I need is for the esp to realise that it is connected to phone. I would be grateful if you could make a video on that. Thanks

I was able to sniff out some traffic for my teptron move blinds but the value seems to change eveytime i send it from the app (Note I am using android HCI logs) does this point to some encryption or something else I need to take into account before I can send the command?

Will this work, if your device ask for a pincode to connect? in part 2 when i connect it ask for a pin code, since the device is a fireplace it has no screen so no pincode available. How can i make this work for devices that ask pincode. The fireplace has only a bluetooth remote no app.