Re: Debugging communications

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Using my smartphone camera and comparing it with my manufacturer's remote,
I discovered the IR LED was lighting up, but was far too dim. I reworked my
circuit to match this one here
<https://www.instructables.com/Raspberry-Pi-Zero-Universal-Remote/>, and
managed to get everything working! So, yeah, it was my wiring at fault.

On Mon, Feb 15, 2021 at 11:25 AM Nathan Gaylinn <[email protected]> wrote:

> I think I've set up my hardware and software correctly, but the command I
> send isn't received by my television. I'm looking for tips on how to debug
> this situation.
>
> I've got a Raspberry Pi Zero W running Raspbian Linux 10 (codename
> "buster") and Linux kernel 5.10.11+. I'm running lircd 0.10.1, installed
> via apt-get and standard repos.
>
> My IR hardware is homemade and connected to one of the Raspberry Pi's
> GPIO pins. I used the same wiring diagram as used in this post
> <https://www.raspberrypi.org/forums/viewtopic.php?t=232688>. I'm using
> the kernel module gpio_ir_tx, configured to use the correct GPIO pin. By
> swapping out a yellow LED for the IR LED, I can verify that running irsend
> will make the LED flash.
>
> The problem is, when I switch back to the IR LED, nothing happens. I'm not
> sure where to go from here, but I can imagine a few scenarios:
> 1) *The IR LED is faulty*. I've tried two LEDs from the same batch and
> get the same result. I can't see a visual flash, but I assume that's
> because the light is not visible to the naked eye. I don't have an IR
> camera, so I have no idea how to verify this. Any tips?
> 2) *I got the wrong kind of IR LED*. I'm using this model
> <https://www.digikey.com/en/products/detail/vishay-semiconductor-opto-division/TSAL6200/1681339>,
> which has the same specs recommended by a different tutorial. Perhaps it's
> not bright enough, or needs a different circuit to drive it correctly (I'm
> using this circuit diagram
> <https://www.raspberrypi.org/forums/viewtopic.php?t=232688>)? Is anyone
> familiar enough with this sort of hardware that you can confirm whether or
> not I've got this right?
> 3) *I'm sending the wrong code*. I have a Samsung TV with a BN59-00856A
> remote control. I downloaded the matching config file here
> <https://sourceforge.net/p/lirc-remotes/code/ci/master/tree/remotes/samsung/BN59-00856A.lircd.conf>,
> and that's what I'm using. I only care about sending KEY_POWER, and I
> notice that key has the same code across many Samsung remotes, so this
> seems unlikely.
> 4) *The LED signal is blocked before it reaches the TV*. This seems
> unlikely, since a signal from the manufacturer's remote sent from
> approximately the same spot works fine.
> 5) *Something else?* No idea.
>
> Any advice is appreciated,
>   -- Nate
>

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<div dir=3D"ltr">Using my smartphone camera and comparing it with my manufa=
cturer&#39;s remote, I discovered the IR LED was lighting up, but was far t=
oo dim. I reworked my circuit to match this one <a href=3D"https://www.inst=
ructables.com/Raspberry-Pi-Zero-Universal-Remote/">here</a>, and managed to=
 get everything working! So, yeah, it was my wiring at fault.</div><br><div=
 class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Feb 15=
, 2021 at 11:25 AM Nathan Gaylinn &lt;<a href=3D"mailto:[email protected]">w=
[email protected]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" s=
tyle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pad=
ding-left:1ex"><div dir=3D"ltr"><div>I think I&#39;ve set up my hardware an=
d software correctly, but the command I send isn&#39;t received by my telev=
ision. I&#39;m looking for tips on=C2=A0how to debug this situation.</div><=
div><br></div><div>I&#39;ve got a Raspberry Pi Zero W running Raspbian Linu=
x 10 (codename &quot;buster&quot;) and Linux kernel=C2=A05.10.11+. I&#39;m =
running lircd 0.10.1, installed via apt-get and standard repos.</div><div><=
br></div><div>My IR hardware is homemade and connected to one of the=C2=A0R=
aspberry Pi&#39;s GPIO=C2=A0pins. I used the same wiring diagram as used in=
=C2=A0<a href=3D"https://www.raspberrypi.org/forums/viewtopic.php?t=3D23268=
8" target=3D"_blank">this post</a>. I&#39;m using the kernel module gpio_ir=
_tx, configured to use the correct GPIO pin. By swapping out a yellow LED f=
or the IR LED, I can verify that running irsend will make the LED flash.<br=
></div><div><br></div><div>The problem is, when I switch back to the IR LED=
, nothing happens. I&#39;m not sure where to go from here, but I can imagin=
e a few scenarios:</div><div>1)=C2=A0<b>The IR LED is faulty</b>. I&#39;ve =
tried two LEDs from the same batch and get the same result. I can&#39;t see=
 a visual flash, but I assume that&#39;s because the light is not visible t=
o the naked eye. I don&#39;t have an IR camera, so I have no idea how to ve=
rify this. Any tips?</div><div>2)=C2=A0<b>I got the wrong kind of IR LED</b=
>. I&#39;m using=C2=A0<a href=3D"https://www.digikey.com/en/products/detail=
/vishay-semiconductor-opto-division/TSAL6200/1681339" target=3D"_blank">thi=
s model</a>, which has the same specs recommended by a different tutorial. =
Perhaps it&#39;s not bright enough, or needs a different circuit to drive i=
t correctly (I&#39;m using this=C2=A0<a href=3D"https://www.raspberrypi.org=
/forums/viewtopic.php?t=3D232688" target=3D"_blank">circuit diagram</a>)? I=
s anyone familiar enough with this sort of hardware that you can confirm wh=
ether or not I&#39;ve got this right?</div><div>3)=C2=A0<b>I&#39;m sending =
the wrong code</b>. I have a Samsung TV with a=C2=A0BN59-00856A remote cont=
rol. I downloaded the matching config file=C2=A0<a href=3D"https://sourcefo=
rge.net/p/lirc-remotes/code/ci/master/tree/remotes/samsung/BN59-00856A.lirc=
d.conf" target=3D"_blank">here</a>, and that&#39;s what I&#39;m using. I on=
ly care about sending KEY_POWER, and I notice that key has the same code ac=
ross many Samsung remotes, so this seems unlikely.</div><div>4)=C2=A0<b>The=
 LED signal is blocked before it reaches the TV</b>. This seems unlikely, s=
ince a signal from the manufacturer&#39;s remote sent from approximately th=
e same spot works fine.</div><div>5)=C2=A0<b>Something else?</b>=C2=A0No id=
ea.</div><div><br></div><div>Any advice is appreciated,</div><div>=C2=A0 --=
 Nate</div></div>
</blockquote></div>

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