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Nov 11, 2019, 07:59 AM
Registered User
@narpat007 Can I use C920 only with such configuration?

if not, with such configuration, how to switch 2 cameras?

thanks
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Nov 11, 2019, 08:10 AM
Registered User
Quote:
Originally Posted by peter.burke.john
Thanks for all the devs that made this work possible!

https://www.youtube.com/watch?v=MV-ciyX_O5Y
Thanks for sharing! Itís nice to hear about things working!
Nov 12, 2019, 03:05 AM
Registered User
Hey, so I'm looking to set my ground Pi to default to 1366◊768, so that I don't always have to switch the monitor on first.

What are the modes and groups in config.txt referring to?

Quote:
Originally Posted by config.txt
# uncomment to force a specific HDMI mode
#
# 640x480
#hdmi_group=1
#hdmi_mode=1
#
# 800x600 Fatshark HD1/2/3 (4:3)
#hdmi_group=2
#hdmi_mode=9
#
# 1024x768
#hdmi_group=2
#hdmi_mode=16
#
# 1280x720 Fatshark Base HD
#hdmi_group=1
#hdmi_mode=4
#
# 1280x800 Headplay HD
#hdmi_group=2
#hdmi_mode=28
#
# 1280x1024
#hdmi_group=2
#hdmi_mode=35
(etc)
Nov 12, 2019, 03:44 AM
Registered User
Aha! Perfect, thanks!
Nov 12, 2019, 10:47 AM
Htcohio
Htcohio's Avatar
Thread OP
Quote:
Originally Posted by greentea
Has someone tried Logitech C920 camera? Can you tell me how to configure?

thanks!
Hi,

Im driving at the moment but, check out the open HD Wiki, there is some updated info and instructions related to that.

I would recommend getting a USB camera up and running first by itself. There are just a couple things you have to do in order to have a USB single camera.

Also, not all USB cameras will work. The c920 does work because it has onboard h.264 encoding and a pretty good sensor.

I had a c922 pro that actually supported h.264 but, it was some proprietary codec for Skype and other streaming services and it did not work with Linux.



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Nov 19, 2019, 11:30 AM
Registered User
Hi
I have started with GoPro Hero 3
and printed first version of housing for Alfa, Raspi A+, HDMI-CSI Adapter
Nov 19, 2019, 11:33 AM
Registered User
Hello Sascha (Mr.Ombre)
Could you please tell me the best settings with your GoPro experience?
Best regards
Jochen Causemann
Nov 19, 2019, 12:59 PM
Htcohio
Htcohio's Avatar
Thread OP
Quote:
Originally Posted by causemann
Hello Sascha (Mr.Ombre)

Could you please tell me the best settings with your GoPro experience?

Best regards

Jochen Causemann
Hi,

I'm going to try I'm in because I've been doing some work with the HDMI input cards.

RECOMMENDED CSI-HDMI SETTINGS

1. Simplify the raspivid so that none of the standard automatic image signal processing like exposure and white balance is used because, all of that is already done internally on the GoPro.
Set as follows:
#
EXTRAPARAMS="-cd H264 -n -fl -ih -pf high -if both"

2. Raspbian has always had a bug where the video bitrate with the HDMI adapter is actually double so, in order to offset that, use 1/2 the video bitrate percent we would normally use.
#
Set 30% bitrate percent.



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Nov 19, 2019, 04:31 PM
Registered User
In the wiki TX power of ALFA AWUS036NHA 280mw. I googled and found These adapters with power 630mw or even 1 or 2 watt.
ChipsetAtheros AR9271L. But in wiki AR9271
What then buy a WiFi adapter with a power of about 500mw and 2.3ghz
Nov 19, 2019, 06:14 PM
Htcohio
Htcohio's Avatar
Thread OP
Quote:
Originally Posted by unixoid26
In the wiki TX power of ALFA AWUS036NHA 280mw. I googled and found These adapters with power 630mw or even 1 or 2 watt.
ChipsetAtheros AR9271L. But in wiki AR9271
What then buy a WiFi adapter with a power of about 500mw and 2.3ghz
AR9271 and AR9271L Is the exact same chip.

There was false info in the past saying otherwise but, Adrian Chad who worked at Atheros said L version just actually had slightly improved thermal performance.

Both types are fine... I promise.

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Nov 20, 2019, 12:32 PM
Registered User
hi,


what's the most powerful atheros dongle ?

Pascal
Nov 20, 2019, 12:39 PM
Htcohio
Htcohio's Avatar
Thread OP
Quote:
Originally Posted by maguet11020
hi,





what's the most powerful atheros dongle ?



Pascal
Ubiquiti Wifistation EXT if you can find them.

Or, Alfa was so kind as to release this brand-new atheros tube this year.
Link:
https://www.ebay.com/itm/Alfa-TUBE-U...-/183927620077

*Note: what were you using currently? I only ask because if you are having range issues it's almost certainly the result of interference on the air or ground.

It it's absolutely imperative to shield and ground the USB signal wires on air and ground.

While testing on the bench with ground antennas removed, on a Pharaoh's you should literally have zero packet loss.

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Nov 20, 2019, 03:16 PM
Registered User
Quote:
Originally Posted by Htcohio
Or, Alfa was so kind as to release this brand-new atheros tube this year.
Link:
https://www.ebay.com/itm/Alfa-TUBE-U...-/183927620077
Has anyone tested yet? Can it be decased, because 126gr too heavy. Output power will be at least 400mw?
Thanks in advance.
Nov 20, 2019, 04:35 PM
Htcohio
Htcohio's Avatar
Thread OP
Quote:
Originally Posted by unixoid26
Has anyone tested yet? Can it be decased, because 126gr too heavy. Output power will be at least 400mw?
Thanks in advance.
Hey, several people have bought them and they seem to work well.

The architecture is very similar to the Alfa AWUS036NHA But, appears to have better power filtering and, improved heat dissipation.

The amplifier is rated at 28db (Approx 500mw)
*At 11Mbps...

Be careful removing the factory N Male Large antenna connector, you might actually need a bandsaw or hacksaw to get it off if you don't have a good butane heat gun and skills.


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