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by allampanato
Sun Dec 01, 2019 1:39 pm
Forum: Graphics, sound and multimedia
Topic: Why 2 mics?
Replies: 3
Views: 229

Re: Why 2 mics?

They're far field microphones so it can do noise cancellation and beam forming. Really interesting. But how does it work? I mean, the HAT do the noise cancellation thing automatically? Or maybe it just gives two input sources and that is all ( the magic happens in the software running on the Pi )!?!
by allampanato
Sat Nov 30, 2019 4:43 pm
Forum: Graphics, sound and multimedia
Topic: Why 2 mics?
Replies: 3
Views: 229

Why 2 mics?

I have been searching for a good audio hat to use with the RPi Zero. I have found this interesting thing https://www.amazon.it/KEYESTUDIO-Respeaker-2-Mic-v1-0-Raspberry/dp/B07H3T8SQY/ It comes with 2 mics on-board. Why? What does it do with 2 mics? Isn't 1 enough? What kind of applications need to m...
by allampanato
Sun Nov 24, 2019 5:46 pm
Forum: Camera board
Topic: Help me choose the camera
Replies: 3
Views: 164

Re: Help me choose the camera

It's cheaper and easier to use a fisheye lens than to design and manufacture a non-fisheye lens with a similar FOV. Plus given the size of the lens and the sensor the tolerances needed are likely to be extremely tight. Thanks. So it is about price, but it is more technically difficult too. But if A...
by allampanato
Sat Nov 23, 2019 6:55 pm
Forum: Camera board
Topic: Help me choose the camera
Replies: 3
Views: 164

Help me choose the camera

Hi, I am developing a smart doorbell with the RPi Zero. I currently use the official OV5640 module and it works. No problem. But, I see that a lot of the commercial ones make use of fisheye lenses ( i.e. Amazon Ring Video ). The official camera has a FOV of 62°, the ones the commercial products use ...
by allampanato
Wed Nov 06, 2019 5:19 pm
Forum: Camera board
Topic: Camera module and H264 doubts
Replies: 5
Views: 793

Re: Camera module and H264 doubts

Great, thanks. So it is the driver/OS who does the encoding, not the camera module.
by allampanato
Wed Nov 06, 2019 1:50 pm
Forum: Camera board
Topic: Camera module and H264 doubts
Replies: 5
Views: 793

Camera module and H264 doubts

Hi, there is a thing that has been bugging me for a long time. If you go to the webpage about the RPi camera ( but other camera modules for other SBCs have similar infos ), you see something like "streams H.264 video". What does this exactly mean? I have reached the wrong impression that the module ...
by allampanato
Sun Oct 13, 2019 9:19 am
Forum: General discussion
Topic: Problem: RPi Zero and keyboard
Replies: 14
Views: 982

Re: Problem: RPi Zero and keyboard

Update: Connected an usb ethernet nic. No problem. Then connected only the usb adapter. No problem. When I connect the Logitech dongle, BOOM! Interesting...

Maybe not enough power!?! The supply is rated at 2.4A, but it is a chinese thing...humm...
by allampanato
Sun Oct 13, 2019 9:12 am
Forum: General discussion
Topic: Problem: RPi Zero and keyboard
Replies: 14
Views: 982

Re: Problem: RPi Zero and keyboard

I connect my Logitech K400 to my Pi Zero's with its Unifying dongle with no issues. I use the adapter in this kit, https://shop.pimoroni.com/products/pi-zero-complete-starter-kit I am using the same hardware. Logitech K400+ and a usb mini/regular size adapter that looks exactly like that one.
by allampanato
Sat Oct 12, 2019 4:43 pm
Forum: General discussion
Topic: Problem: RPi Zero and keyboard
Replies: 14
Views: 982

Re: Problem: RPi Zero and keyboard

Why does a Bluetooth keyboard need to be plugged in to the Pi anyway? Surely it just uses a Bluetooth wireless connection. Is Raspbian, in its default configuration, able to recognize and usb a bluetooth keyboard? Because without a keyboard I cannot even configure Raspbian. I was thinking of settin...
by allampanato
Sat Oct 12, 2019 4:19 pm
Forum: General discussion
Topic: Problem: RPi Zero and keyboard
Replies: 14
Views: 982

Problem: RPi Zero and keyboard

Hi, I tried ( for the first time ) the RPi Zero today ( I bought the W variant ). If I start it without a keyboard connected, it works ( but without keyboard I cannot even login ). If I connect the USB keyboard ( a logitech bluetooth keyboard ) to one port and the power source to the other, it doesn...
by allampanato
Thu Oct 10, 2019 5:04 pm
Forum: General programming discussion
Topic: Programming languages support
Replies: 37
Views: 4106

Re: Programming languages support

1) Dealing with web sockets in node.js is trivially easy. Plus 1 point for Node.js then. For now I don't know if Websockets or WebRTC is the better solution. From what I have read, the difference between the two is that WebRTC supports P2P connections. The requirement for juggling inputs from GPIO,...
by allampanato
Thu Oct 10, 2019 4:59 pm
Forum: General programming discussion
Topic: Programming languages support
Replies: 37
Views: 4106

Re: Programming languages support

If I were writing code for a complicated multi-threaded server, I would try Go. Yes, this is one of the problems. The RPi Zero W is the core of a smart doorbell and one of its features is streaming the camera to a bunch of clients on demand. I will have a hub for the heavy lifting, so for now I am ...
by allampanato
Wed Oct 09, 2019 3:40 pm
Forum: General programming discussion
Topic: Programming languages support
Replies: 37
Views: 4106

Re: Programming languages support

Yes, I know that practically every programming language can run on the RPi/Linux. But I need to access the GPIO pins and the camera module. And not every language has bindings to the appropriate libraries. I know that Python has them all. Nodejs should have them ( not 100% sure ). All others, don't ...
by allampanato
Wed Oct 09, 2019 2:16 pm
Forum: General programming discussion
Topic: Programming languages support
Replies: 37
Views: 4106

Programming languages support

Hi to all. What is the state of various programming languages on the RPi? I am currently planning a project, where I will need to access the GPIO, the camera module and use Websockets. So I need a language which can access all the features of the RPi. I will use a RPi4 and a RPi Zero W. I know Pytho...

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