Wireless HDMI?

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Wireless HDMI?

Unread postby Jawbraeka » Thu Aug 03, 2017 1:43 am

Anyone considering it for emulation and cabinet..?

Alibaba has some awesome and hopefully cheap setupsm. I'm enquiring about one i think would be an awesome addition if say we could shrink one down..

I found one that's 88mmx55mmx22mm (from memory).. So maybe if we tear one down, customize a complete design and use it within the forums for members, perhaps a new expansion board idea to do away with cables???
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Re: Wireless HDMI?

Unread postby Jawbraeka » Thu Aug 03, 2017 11:29 am

Was quoted $95 USD for a transmitting receiving set..

They look like this

http://www.lengtion.com/701-hdmi-digita ... aming.html

The contacts name is grace le and her email is sales@lengtion.com.. Just needing a confirmation for PayPal..
Last edited by Jawbraeka on Thu Sep 14, 2017 7:30 pm, edited 1 time in total.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Thu Aug 03, 2017 11:45 am

They look like this.. But was thinking strip the case and mount the board to the xu4 as a complete unit.. Then use a small patch cable to connect the two units together.
Attachments
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HTB1qmXESFXXXXXqaFXXq6xXFXXXW.jpg.png
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Re: Wireless HDMI?

Unread postby Jawbraeka » Fri Aug 04, 2017 5:15 pm

Found these as well..

https://youtu.be/Yh18x1jpiJs

Fingers crossed they have similar internals to these
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Re: Wireless HDMI?

Unread postby Jawbraeka » Fri Aug 04, 2017 6:05 pm

Working on getting some images of internals so we can see what we're working with here.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Fri Aug 04, 2017 7:00 pm

More to come..

Will get a photo of the transmitter
Attachments
underside.png
Underside of board.... What's under the mysterious black covering?
underside.png (480.4 KiB) Viewed 1855 times
30M TX-1.png
Top of transmitter board
30M TX-1.png (585.81 KiB) Viewed 1855 times
30M TX-2.png
Plugs of transmitter board
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30M RX-1.png
Top of receiver board
30M RX-1.png (496.8 KiB) Viewed 1855 times
30M RX-2.png
Plugs on receiver board
Plugs of receiver board..
30M RX-2.png (493.99 KiB) Viewed 1855 times
Last edited by Jawbraeka on Mon Aug 28, 2017 2:13 pm, edited 2 times in total.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Fri Aug 04, 2017 7:14 pm

So.. Does anyone have any ideas on how me might be able to integrate these with the odroid to make them a little more fancy and do we have any electrical engineers in the house or someone who is an electronics buff who might be able to word us up on any mods we could possibly perform in order to make these broadcast a better stronger signal..

I'm buying some and some feedback would be greatly appreciated.
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Re: Wireless HDMI?

Unread postby odroid » Sat Aug 05, 2017 9:37 am

It looks more expensive than ODROID board itself and most people don't think the accessory is worth to try.
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Re: Wireless HDMI?

Unread postby phaseshifter » Sat Aug 05, 2017 1:05 pm

you need to tweak the transmitter if at all it can be done..you may also need better power-supplys...much like when ham`s tweak there sets..but that amp module looks ..a pretty enclosed unit..prolly to hard to modd it..at best maybe you could fit an external antenna..i dont see much from your pics..but an antenna to be tuned..much like co-phases on uhf antennas..it`s hard to say if you would get much advantage signal wise with a higher"D.B" antenna..but antennas make the easiest moddable..so i would look at that before trying to power up the out put power of those modules...
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Re: Wireless HDMI?

Unread postby phaseshifter » Sat Aug 05, 2017 1:12 pm

for me to do any modd to the mentioned unit i would have to obtain one and since i have no use 4 one youll have to look at my above methods

typically without schematics of the unit`s i would be very dubious of any modd to these units
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Re: Wireless HDMI?

Unread postby Jawbraeka » Sat Aug 05, 2017 10:55 pm

Thanks for the feedback..

I'm ordering one soon. So I will try it across the room to see if it works within the recommended 30ft inside and outside the desk. If it doesn't work inside the desk, i was thinking of just modifying the aerial to work outside of the desk and without knowing what is on the label they fuzzed out.. Might be hard to determine what shelf parts they've used to construct it.

I was also thinking if the boards are around the same size maybe a couple of risers and mush the boards onto a single platform. Then I can make a wooden box to stay in the desk for protection.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Sat Aug 05, 2017 10:58 pm

If you want, I'll crack it open and see if there is anything else apart from those boards..
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Re: Wireless HDMI?

Unread postby phaseshifter » Sun Aug 06, 2017 12:47 am

no dont crack it open..if you can fit an externel antenna that would prolly be your best shot..
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Re: Wireless HDMI?

Unread postby Jawbraeka » Sun Aug 06, 2017 8:15 am

The pictures tell the story.. Might need to fit an aerial fitting to make that happen.. There are other HDMI sets I could use.. But these are the most compact units I've come across.
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Re: Wireless HDMI?

Unread postby phaseshifter » Sun Aug 06, 2017 1:49 pm

if you have access to a high frequency counter attach a probe to the amp head and it should give you an approximation of what freq range antenna to use..low or high band..

the notes for the unit may also state it`s freq range.
.then all you need do is find a feed point to attach the cable to
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Re: Wireless HDMI?

Unread postby Jawbraeka » Mon Aug 07, 2017 8:51 pm

ok.. i don't have access to a high frequency counter, but i'm guessing those stickers they've blocked out might tell me without having to go too far.. and attaching an external aerial would be as simple as using the existing aerial points already used by the device itself.. just need to see how it fits together..

power is self contained and within the unit itself, so i won't go messing with that.. just relocate the aerial and strap it externally to the desk.

Haven't got it yet.. will continue this thread when i have the item in my hands..
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Re: Wireless HDMI?

Unread postby phaseshifter » Tue Aug 08, 2017 2:35 am

the type of antenna is important weather it be high band or low band.
.i`m guessing high band though as most gear runs this way these days..
so some matching will be involved..phase...
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Re: Wireless HDMI?

Unread postby Jawbraeka » Thu Aug 10, 2017 10:20 am

OK.. Ordering tomorrow..

Will keep you posted on how it's coming along.
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Re: Wireless HDMI?

Unread postby phaseshifter » Thu Aug 10, 2017 9:49 pm

there is nothing in the rules as to what antenna system you can run...you can run any type of antenna you like..tis is like for e.g. open source antanna wise...

how ever vswr will still come into the equation
and once you do connect an antenna you will unless you totally isolate the on board antenna.
.which just will most likely be a copper track on the board..here inlays is the problem..on the transmitter side any way..if vswr goes to high you risc damage to the output amplifier stages of the board hence also more power from the supply may also be an issue..i dont have a schem in front of me and i cannot tell you that an on-board power regulator system exists..if it does or not..it may only allow for its set current..

as for the receiver it prolly wont effect it it..but on the Tx side this is important to note...

having said all this..conclusion...there is no rules when it comes to antennas..d.i.y your heart out...phase...
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Re: Wireless HDMI?

Unread postby Jawbraeka » Fri Aug 11, 2017 9:30 pm

I didn't think there was.. Lol.. Kind of like a coathanger to a coax cable.

All I want it to do is work outside the desk really, if it doesn't work within.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Mon Aug 28, 2017 12:30 pm

OK.. Sorry about the wait.

Tested the boards and they are super ideal for a near wireless setup..

Tried them in my wooden desk and transmission became slightly intermittent over distance and interference. Other than that, they worked. They transfer audio also which is a mad bonus.

Now for the ultimate part. The HDMI powers them so, if you wanted, you could simply find a couple of couplers and mount the HDMI board to the base of the odroid and then couple the two devices together.. Boom instant wireless broadcast. One less cable.. Doesn't seem to be much issues running the HDMI module and USB hub together..

So far, this has helped out a bunch with minimizing wires and cable.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Mon Aug 28, 2017 12:31 pm

If only I could now find Bluetooth print servers for the controllers.. No wires anywhere.. Except for power.

The sweet smell of success.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Mon Aug 28, 2017 2:26 pm

Here is the sticker information...

VM331T
FCC - MQ4-VM331T
IC: 2826B-VM331T


IMG_20170828_152331_364.jpg
Receiver board information.
IMG_20170828_152331_364.jpg (74.93 KiB) Viewed 1443 times


IC: 2826B-VM331R
Attachments
IMG_20170828_152558_888.jpg
Transmitter sticker information
IMG_20170828_152558_888.jpg (60.76 KiB) Viewed 1443 times
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Re: Wireless HDMI?

Unread postby Jawbraeka » Mon Aug 28, 2017 2:48 pm

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Re: Wireless HDMI?

Unread postby phaseshifter » Tue Aug 29, 2017 12:12 am

if you could find an antenna point at 60Ghz you would be hard pressed to make an antenna to match this freq...
.it would be very small to match that freq
a coat hanger may do some justice
but weather it would make any real difference ..
.you will find out.through experimenting..
the freq being so high this is why you cannot get it to transmit through encapsulated places
for best performance a clear line of sight an obstacle free transmit path for best results...y because the freq is so high in the 60 Ghz range
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Re: Wireless HDMI?

Unread postby Jawbraeka » Sun Sep 10, 2017 12:32 am

It works for the purpose I have.. Transmits to TV excellently.. Only suffered slight jitters when someone stands in direct line of transmission.. However.. That is fairly brief and isn't too much of an issue. Also, I've decided to mount the aerial on the outside of the desk to alleviate the delay, as when it sits inside the desk, the interference is immediate and figure mounting the board to the outside using some small risers and nuts might do the trick to secure it to the desk.. Otherwise I'll get some long threaded Phillips head screws, a few tiny nuts to adjust mount height on the external side of the desk and the board and use the cover of the shell of the wireless HDMI to protect the HDMI board..

Thanks for tour help with this.. And trust me when I say it was an awesome purchase. Doesn't require any configuring to get it working, just power with micro USB power supply. Also I could mount it with the odroid as a complete unit, however the HDMI ports don't quite line up together as they sit a few mm apart , but a small modular HDMI jumper cable or a custom HDMI plug (similar to what USB jumpers used for sata mount board on raspberry pi) would be perfect for this to make it a perfect solution..

The transmitter board could be powered via gpio to micro USB plug to alleviate further power supply usage, and receiver only needs a micro USB plug, so if display has HDMI or somehow power could be routed via HDMI, you could essentially have a cordless powered device with no power supplies and complete freedom of where device could sit, provided it's line of sight and without major interference.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Sun Sep 10, 2017 12:43 am

https://fccid.io/document.php?id=1981806
Transmitter board.

https://fccid.io/document.php?id=1981800

Receiver board.

Any clues on where I'd Mount the new aerial(s)
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Re: Wireless HDMI?

Unread postby phaseshifter » Sun Sep 10, 2017 11:21 am

hard to tell it could be an internal setup ..like centrino cpu`s they have everything inside the chip...at beast attaching it to the chasis may do some justice..it would if there is an antenna give it a ground plane..if it`s built into the chipset which is higly likely..then your not going to have much luck

schematic diagrams would be the easiest way to tell about the placement of the antenna if it is only a track on the board...

however your talking at 60 gig`s here..frequency...i am not shure that giving it a huge ground plane would do much..if at all...
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Re: Wireless HDMI?

Unread postby Jawbraeka » Wed Sep 13, 2017 2:59 pm

I'll see what I can do.

I did notice under the black "stickers" there was a graphite coloured looking coating under clear plastic.

Perhaps it is the aerial or a protective layer..

I'll see if the seller will provide schematics.

They might. You never know.

I'll also let them know about this thread.
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Re: Wireless HDMI?

Unread postby phaseshifter » Thu Sep 14, 2017 12:00 am

generally speaking i would not tell them what you have done to their product..even if there just a reseller of it..

you will have voided all warranty by doing what you have done..
although you will find that they dont release schems so peops cannot reverse engineer their product...i could go on but you may not like my response..
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Re: Wireless HDMI?

Unread postby Jawbraeka » Thu Sep 14, 2017 7:33 pm

I'm aware they wouldn't like it.. They even thanked me for advertising their product. So in short..

They mentioned that the aerials were situated near the holes at the top. Being the boards only position themselves in one way, this won't be hard to ascertain where the aerial is positioned on the boards.
Attachments
aerial position.png
Aerial positions.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Thu Sep 14, 2017 7:39 pm

I have a feeling, these can be modded and quite easily.. Just use a small aerial fixture for an aerial or maybe a small WiFi terminal, similar to what is used on a WiFi aerial on a m.sata board and attach an extension.

I've used a 5V 5A supply and it did no harm to the board itself. The receiving end was using the tvs USB which I assume is around 500ma.
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Re: Wireless HDMI?

Unread postby Jawbraeka » Thu Sep 14, 2017 8:01 pm

They advised me the two circles are supposed to be in 'line of sight' as much as possible..

I've asked if soldering a WiFi aerial terminal night help broaden the signal so intermittent traffic (say a person walking past) doesn't interfere with the signal by broadening it out akin to WiFi.

Something like this. So the WiFi aerial is soldered to the board and the screw part is in the cover
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Re: Wireless HDMI?

Unread postby Jawbraeka » Thu Sep 14, 2017 9:05 pm

Just a quick update.

This is the aerial as far as I can work out.

Any ideas would be greatly appreciated.
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Position.jpg
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Re: Wireless HDMI?

Unread postby phaseshifter » Fri Sep 15, 2017 12:31 pm

your saying that the antenna is located near that pinhole...hmm
then can you post a very close up pic of that corner of the board...
i dont think what you have circled is an antenna just does not look like any type of antenna i have ever seen they look like components..but it may be ..
i would be looking at the inductor looking component just at the upper right of the block..
that would be more a type of antenna i would expect at it`s opp freq...
Last edited by phaseshifter on Fri Sep 15, 2017 12:38 pm, edited 1 time in total.
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Re: Wireless HDMI?

Unread postby phaseshifter » Fri Sep 15, 2017 12:33 pm

really without a schematic you may be hard pressed..the amp module block only needs a small track of c-bord wire to give it an antenna at it`s operating freq....
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Re: Wireless HDMI?

Unread postby phaseshifter » Fri Sep 15, 2017 12:56 pm

some info for you...

the FCC maintains strict policy at how much power in rf if you could still call 60 gig rf.. the maximum wattage in power it can transmit hence prolly why they have driven the freq range so high

personally i would not like to be walking round with that omi directional transmit freq...hence the power does not need much...this is why line of sight is so important for your device..

thus said there are rules and regulations in place to be shure that the tx power does not harm a living being...
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Re: Wireless HDMI?

Unread postby phaseshifter » Fri Sep 15, 2017 1:21 pm

i would not totally rule out that what you have circled is in fact the antenna..

if it is forget about adding an antenna to it..
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Re: Wireless HDMI?

Unread postby Jawbraeka » Wed Sep 20, 2017 11:31 am

No problems.

It does look a little fiddly.

It does broadcast a signal. So why mess with it I suppose...

I guess the only preventative measure I could use is to tell the "obstruction" to move.
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Re: Wireless HDMI?

Unread postby phaseshifter » Wed Sep 20, 2017 12:39 pm

not much more i have to add at this point...but do what you will ....phase....
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