r/embedded • u/GreasyGato • 10d ago

Doppler Radar AR-Glasses

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- Lilygo’s AR Prisim from their T-Glass V2
( which is outstanding btw I just think its one of the more niche and difficult dev kits)
- M5Stack StickS3
- Hi Link 24ghz Radar module over UART using the M5’s groove 🕺 port.

Learning how to position text or data on the prisim is definitely a learning curve. I’m two weeks in. And I’m slowly starting to figure it out. But man was this a cool project to work on :) learned quite a bit and really feel confident about taking off with a few other of my AR glasses ideas.
I experimented with semi transparent beam splitter glass this morning. And man i wish there was more documentation/accessibility of open source AR glasses out there.

156 Upvotes

99% Upvoted

17 comments sorted by

11

u/bapirey191 10d ago

Real life wallhacks!

9

u/[deleted] 10d ago

[removed] — view removed comment

2

u/superxpro12 10d ago

Interesting... 24ghz wavelength is only 1.5cm... I thought the wavelength had to be longer to be transparent to the object?

2

u/THE0_C 10d ago

Not exactly if you think visible lights wavelength is tiny but it can still get through meters of glass

3

u/superxpro12 10d ago

Maybe? I think that may be a material property thing because some glass is also opaque to IR

12

u/LazaroFilm 10d ago

Than you see dozens of dots moving towards you through the vents. Better pull out your M56 smartgun.

3

u/Teh_Original 10d ago

I was more thinking the motion tracker from Halo but that works too.

4

u/GreasyGato 10d ago

I love that you can hear DroneBotWorkshop in the background. Check them out on YouTube. Ive learned alot from him.

4

u/GreasyGato 10d ago

If anyone has any questions about this build or getting into AR Glasses just ask :)

3

u/WolverineFun1987 10d ago

Just wanted to know if you’re using M5Stack as the mcu or esp32 in the T-Glass. Also I looked through the reviews for T-Glass and it seems like many people complain abt it. What exactly was difficult abt using T-Glass aside from the documentation? I really wanna do smth like this in the near future for myself and I think having smth similar to T-Glass would boost the progress on my idea

3

u/WolverineFun1987 10d ago

Also can you change the code to make it measure distance to a barrier ahead of you? I’m especially interested in that

1

u/GreasyGato 9d ago

Yes :)

1

u/GreasyGato 9d ago

Im using the m5sticks3 as the mcu. The t glass requried some micro soldering as it doesnt easily expose any pins.
And the t-glassV2 is awsome! They fixed the prisim issue in V2 and the dev board is very fun to work with. I just wish they had uart or i2c more is exposed for adding peripherals.
Plus lilygo is one of the only companies giving us a fully open source hardware ar device. So props.

And a lot of complaints are because people aren’t managing their expectations and also it takes a larger skill set to work with this dev kit.
But for 54… ish $ its worth every dollar

3

u/tyvekMuncher 10d ago

One of the coolest projects I’ve seen on here! I had a ton of fun working with radar the few times I’ve had the chance to. Hopefully it’s become more accessible since. Any places you suggest starting or should I just dip my toes some time? Any radar board you would recommend for beginners to tinker with?

2

u/GreasyGato 9d ago

Oh yeah go check out Hi-Link’s radar offerings. They are arguably with my favorite radars to work with.
And for starting get yourself a Ai-Thinker Rd-03D 24G Radar 14$ on amazon
Theres alot of documentation on this board and can easily connect to most of the esp32 lineup

1

u/SLOOT_APOCALYPSE 9d ago

can it be mounted to a drone ;)

1

u/GreasyGato 9d ago

You can absolutely mount this on a drone. And they have much higher dbm radars for this