train something a little different today this is generic lager from Little Brown Jug brewing
in Winnipeg there's no tasting notes on the can or anything else they just describe it
as impressively standard which I'm wondering if that is a reference to standard lager which was a
Manitoba beer since I think the 1940s but uh the big Mega Brewery who brewed it discontinued
it last year so yeah I'm wondering if that is a reference to that judging by The Taste I think it
might just be a reference anyway today I am going to be taking a look at this smart Bluetooth outlet
that I got from you guess it diorama claims to work with all the usual uh suspects of uh spying
I mean iot so that's cool I guess for people that are interested in that it has Bluetooth which is
more interesting however the last Sylvania Smart Plus device that I looked at that light bulb
um you needed to log into their server and create an account and everything else before
you could use the Bluetooth on it so I'm not holding out any hope that this is going to
be any different but you never know you could be surprised and who knows it could even be hackable
foreign here doesn't say too much other than the usual cautions it's got a
code to uh to pair it if you're using one of these proprietary systems
or you can just force it into powering mode and this is actually pretty much the same text as
came with that light bulb so I'm guessing it's probably the same chip inside on the front of it
there's just one female plug and a little hole there which I'm guessing is an LED to tell you
what its status is and on the back there's some very low contrast text which is not all that
informative 49th week of 2021 maybe FCC ID if we want to dig a little deeper into it oh yeah
and it claims to be able to handle 15 amps with a resistive load that's probably the most useful
bit of information on the back of it so I am going to guess that there is a relay and a little module
in there a module that is probably very similar to this one that I took out of the light bulb
few weeks back we'll have to see so there's an obvious seam around it if I can get a spudger
or two in there I might be able to just get into it without completely and utterly destroying it
but it's kind of resisting my abuses here let's see if I can jam anything else into there
[Music]
well a non-destructive entry means doesn't seem to be doing anything I may have to get destructive on
this thing these spudgers won't go down more than a millimeter or so right violence ensues excuse me
[Music]
foreign
there huh that was a battle wow so I didn't even notice this push button on the end here
when I was initially looking at it but it kind of got in the way of my grinding here
but whoa we are in woohoo as expected we have a relay there's a little module I'll
get to that in a minute that will be the Wi-Fi and Bluetooth module there's the push button
that is echoed through from the end of the case there is the three prongs going to the load side
oh and this is interesting you see this little plastic doodad down in here it's got a clicky
push button under it listen you can't hear that so when you plug a load into it that pushes down
to that little plastic guy and pushes the push button that's hiding underneath it which I'm going
to assume tells the microcontroller that there is in fact a load plugged in that's kind of groovy
uh where was that hole in the front of this thing that's up in this corner here is there an LED
underneath that no there is not there's a diode in the resistor oh no there's an LED just down below
them okay so that will faintly go through that hole in the case I guess to indicate status right
what else have we got on here got some power supply action going on on this side we have a
diode there we have a bridge rectifier there a couple of capacitors over here
that is marked L1 so that's an inductor
another inductor here and presumably a power supply chip that little eight pin guy there
kp3210s0 tp3210sg on Second Glance that is actually what it is not an s0
it is a high performance a low-cost offline pwm power switch yep it is a switch mode power supply
chip okay so there is the typical application circuit it can be set up for either a greater
than 10 volt or less than 10 volt output alrighty so the bridge rectifier feeds high voltage DC
into there a bit of smoothing and depending on where this diode connects back into the
feedback and current sense resistors will tell you or I guess we'll determine whether it's a
greater than or less than 10 volt output okay useful little chip by the sounds of
it I guess that makes a certain amount of sense that is the power supply chip
and as I said we've got inductors and capacitors surrounding it then we've got this little guy here
Mark U2 little six pin device actually a five pin device marked four four two a I'm going to guess
just because of where that is that's also part of the power supply if my Googling is correct it is
a 300 milliamp low Dropout regulator with reverse current protection uh looks like they're available
in voltages from 2 volts to 15 volts okay and if I'm reading this right it is a 4.2 volt
regulator or if there's anything on the bottom side of this board other than just the AC input
oh that's interesting the ground pin is just kind of jammed in there I guess it
doesn't need to make a contact the internals there is that little uh switch lever and there
is the switch that pushes down on to tell the microcontroller that there's something plugged in
we have actually a little anti-tracking slots there and there so that's kind of cool
fuse there so no components on the back of the board there's the two anti-tracking slots we
spotted from the other side then there is another big one over here which is in between the contacts
of the relay I guess that makes sense and down at this end where we started we have a couple
of transistors diode up there like we saw earlier that led a push button to locally control it and
the relay relay which claims to be able to handle 15 amps 125 volts which is in fact the rating that
was written on the outside of the device and then we have the little RF module slash microcontroller
ewn8250 etc etc I don't recognize any of those numbers back to the Google machine shockingly I've
been able to find a data sheet for every single thing in here that's unheard of so it is capable
of Bluetooth LE it has internal flash it has audio support wow uh 2.4 gigahertz iot yeah Bluetooth 5
Boe we have the five zero variant so it's got 512k of Flash in it can't imagine something
that's doing this job would need more than that and it also has 48k of on-chip SRAM hmm cool
ah yes write protectable memory so even if I knew how to get the memory out of this thing I wouldn't
be able to not that it matters it runs on 3.3 volts so maybe I misunderstood that regulator
or maybe there's something else happening to drop the voltage down for this guy I'm not sure
so what else can we learn about this guy there's seven pins so not a water gpio
power ground and five gpio pins all of them are capable of pwm
two of them are ADC inputs huh well I guess that guy is more than capable of handling just
such a light load like this Nifty little chip so it looks like out of those five gpios it's
using probably three of them one for that push button one for this push button here
one for the output to there well just for fun let's uh see if we can find some voltages in
there just to figure out a little bit more about what's going on so you can figure out if this
guy is in fact a 3.3 volt regulator which would make more sense since this thing wants 3.3 volts
oh that's not what I expected
you hear that the relay is just clicking away here okay so does this do anything doesn't make
any change does this no hmm let's just measure across some of these little ceramic caps down
here by the power supply I'm assuming we should get whatever the output of that is
half a volt that's not good
seven oh there's seven volts across that one okay
so presumably that's what this guy's putting out um am I in a positive or minus here
okay so that's a negative side see if we can find any voltage over here
that's bouncing over the place
that's bouncing all over the place that's a capacitor associated with the uh
with the regulator there so I'm going to assume that probably that regulator is bad
or something upon closer inspection it looks like my hem fisted Spud ring obliterated that component
there that would probably explain where the power supply is not working properly regardless I uh I
wasn't planning on using this anyway although I was thinking possibly if this module was
big enough physically in there I might try and replace it with an esp-01 module
but I don't think there's enough room in there for that it is pretty tight inside there it's a very
very thick casement that's unsurprisingly thick so that is I guess good for electrical insulation
but I don't think that leaves enough room for one of these guys in there which is too bad
because that would have been a uh interesting little way to reverse
engineer it or not reverse engineer it to modify it so that it's not spying
on me or sending information home or forcing me to use its proprietary app
I learned what I needed to learn about that I hope that satisfied
your curiosity a little bit too if you see one of these things at your local discount store
I suppose I could Salvage the relay and some components out of there that's about the only
value I think I can get out of it uh other than of course the value of curiosity and learning
thanks for watching uh questions and comments down below as usual I will talk to you later