Echo Dot Gen 3 - Mic Disable Circuit Reverse Engineering
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- Опубликовано: 8 сен 2024
- How does the microphone disable circuit on the Echo Dot work? This video aims to look into more detail of that, along with if it's possible for malicious code on the main MPU to turn it back on. Check out colinoflynn.com... for the resulting schematic.
Another in the "unedited rambling" series, so this one is long for minimal pay-off! But gives some idea to how the R.E. process works.
End Result - lots of real hardware here stopping an easy attack. One last thing to check is if the main MPU can cycle the power, as on power-on the microphone does come up "live".
This channel deserves a much better exposure. Not a lot youtubers actually go to this level in explaining the entire procedure. Thanks alot. Keep up the good work
1:17:35 is where he says the alexa can't turn the mic on on its own. (the mic button is hardware)
Would be good to have a video on how to permanently disable the mic by default. Removing the 4 mics for example, or creating a short or something which guarantees the can not work, whilst allowing the use of the dot as a smart speaker.
Thanks for this work. This gave me a great insight into reverse engineering. Great respect.
But in this case I think, SoulR3ap3r has reasonable doubts:
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Comment, 1 year ago: "So bottom line, does it really kill the mic or does it stay hot and they lied about it shutting off?. Thanks"
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My fear:
what was shown here is only the way that the microphones can be switched on and off with the button. I don't see it as proven that parallel to the switch, there is not a second hidden software solution somewhere. On the software side, it is very easy to suppress or manipulate the light signals.
A rascal who thinks evil of it.
My suggestion:
create a monitoring circuit: connect all 4 microphone voltage supplies to an external FlipFlop catch circuit (4 channell and adjust voltages). Works for example with an Andurino.
Let the Echo Dot - as long as you can do without the microphones - run in mute mode. If, contrary to expectations, one of the microphones receives a supply voltage when the microphone is switched off, you have proof that Amazon can switch the microphones on via software.
Incredible video. Thanks for the awesome production quality and effort you put into this.
Do I need a special sized soldering iron to release these microphones? I only have a regular soldering iron I use for stained glass work. I am afraid of frying everything else. Advice? Excellent video, thanks for doing it!!! Just need to know how to kill the mics.
Dropped mine in doggy bowl, mic perm off, but ima take it apart maybe there is still water inside. If not, into the garbo cuz im not gonna be replacing any of those hard wired mics! Thx for insight in your vid.
So bottom line, does it really kill the mic or does it stay hot and they lied about it shutting off?. Thanks
It kills it
look at my answer on the top.
sir , in my echo micro phone board , that connecting port is damaged , what can i do? is there any alternatives? can i use this board for any other activities?can i reuse this echo dot?
Very nice project!
Can you help me to find a 3.3V or 5V source on this PCB? :)
I said hi to my cat instead. Neat vid. I don't own any Alexa stuff but was a fascinating exploration all the same.
Awesome content, bro! Thanks a lot!
Maybe you have something about uart shells on residential routers?
uart shell on any device would be super help. Thx again.
I think about putting an on / off switch on the microphone!
I have put the on/ off switch on the microphone, but i'd kill three other microphone only can control one of them...
If I have a time and I may be made a video about it.
Hey professor, late on this buttt @electronupdate is a fellow Canuck who's done a similar (though, sadly, very rushed/rapid) rev eng. If you're not aware of his channel its top notch. His short analysis is somewhat cursory (AFAIK he didn't do in depth analysis re: re-enabling aforementioned feature) but still fun.
Your work (and Karsten and Goodfet and the severely underrated @joesmith-je3tq them folk[basically anyone who, upon deciding to go down a rabbit hole, decides they will go deep, deep down generally put out A+ content]) is super great!!! Big fan, huge fan. #1 fan. ahaha keep rockin. -andrew
Thanks. I wish they allowed users to physically isolate the mic. Are the latest generation as hard to remove or disable the mic?
Hey, love the videos on this sorta tech. I was wondering if you could help me identify the positive and negative pads for one of the microphones on the board. I'm trying to patch a microphone in for a project I'm building but I can't seem to locate any pad in relation to the microphone
Is it possible to extend the mic? de solder the mic and add 12 ft of wire to extend the mic across a room?
Is it possible to place a 1/8” TRS in place of one of the microphones to be used as a connector for an external mic? We use these in an A/V system, but have to strap a headphone over the top and do some heavy eq to get it to kinda work. With an input Jack, we would have much better control over the signal going in.
i would like to disconnect the speaker (alexas voice) in one of my alexa devices. Have you done this?
how about blocking the mic holes, some mechanical attachment
Hey, nice video! Which microscope do you use?
Is it possible to de-solder the microphones and the device still work?
I may attempt this soon... I'll let you know if possible!
@@kevinburns8473
Any updates?
@@noyes. I didn't break into it, ended up giving the decide away to a friend. In theory, it should work with no issues, unless Amazon hard coded those mics to be required... Knowing Amazon, thats a fully plausible assumption.
Doesn't that defeat the whole point of having it? Unless you mean patch some other signal into the microphone inputs.
@@NiHaoMike64 Getting rid of the microphones would prevent anyone listening and you could still play music via bluetooth.
Can we connect echo dot to 12v lithium ion batteries
@@ROBOROBOROBOROBO thanks sir
@@ROBOROBOROBOROBO can we operate it without outer cover.(mother board only)
Can you make a video how we install a physical switch in those microphones（How is the circuit and how to wire it out）, so we have full control.
Dude, the internal circuit is good enough. It is a physical switch. If you want it to be more physical unplug it or hit the soc with a hammer:)
@@sanches2 Thank you for the reply, I had already figured out already, I am physical installed switches，with renote control switch that can control the microphone directly.
@@CRK1918 Nice! I made a video showing how to do this for a 2nd gen. Echo Dot.
Short answer: Yes it works
Good day ¿Is it posible to install a external microphone en echo dot? Thank you.
Via bluetooth
¿Can you help me please? I have a problem with my alexa :(
I just broke the 4 gold things so my alexa cant here me now thanks
Enjoyed that, thankyou....I have a Google home, I wonder if that is as trustworthy?
"google" and "trustworthy" in one sentence, thats a joke of the year right there :)