DevHeads IoT Integration Server•13mo ago

Hi @Techist

wafa_athOP•12/3/24, 1:22 PM

Are u done the abstract

fei•12/3/24, 3:46 PM

Hi, I was wondering when testing RFID for production, I have noticed that if the RFID tags are in a bundle and stacked tightly together one on top of each other on top of a UHF RFID reader, it will most of the time read the EPC wrong. Is this a hardware limitation or code limitation?

matthewflynn_•12/3/24, 4:01 PM

Is itpossible for me to output different apps to each hdmi port on the pi 5? Basically I have a touchscreen hookedup to hdmi 1 (nearest usbc port) and a projector on the other.

I want to be able to output control program to the touch screen and the projector output a different app?

Mmatthewflynn_Is itpossible for me to output different apps to each hdmi port on the pi 5? Bas...

melta101•12/3/24, 4:06 PM

i think it should be possible with wayland

melta101•12/3/24, 4:08 PM

not sure of the specifics but a startup shell script should suffice

melta101•12/3/24, 4:11 PM

ref: https://wayland.app/protocols/xdg-shell#xdg_toplevel:request:set_fullscreen

You could use these API if you want to make a binary

XDG shell protocol | Wayland Explorer

A better way to read Wayland documentation

melta101•12/3/24, 4:11 PM

This should help you

matthewflynn_•12/3/24, 4:18 PM

cool - thanks for the help - so is each hdmi treated as a seperate output through 1x login and can I just specify each app to a specific hdmi port?

Mmatthewflynn_cool - thanks for the help - so is each hdmi treated as a seperate output throu...

melta101•12/3/24, 4:21 PM

in wayland
it considers display from display output.
So you could specify which app to open with specific display

melta101•12/3/24, 4:21 PM

its an index WAYLAND_DISPLAY

Mmatthewflynn_cool - thanks for the help - so is each hdmi treated as a seperate output throu...

melta101•12/3/24, 4:29 PM

there seems to be a package called wmctrl which does what you want
https://linux.die.net/man/1/wmctrl

melta101•12/3/24, 4:30 PM

but you should know the resolution prior

matthewflynn_•12/3/24, 4:30 PM

thats fine I know the resolution of each screen and it will remain static - its not like I am going to hotswap or anything

matthewflynn_•12/3/24, 4:30 PM

this look good - I'll give it a go!

matthewflynn_•12/3/24, 4:30 PM

Thank you so much for the help

Ffei Hi, I was wondering when testing RFID for production, I have noticed that if the...

wafa_athOP•12/3/24, 5:20 PM

That called tag collision in RFID, it's hardware limitation

AlexTryHarder•12/3/24, 6:45 PM

I have a tricky one here.
Got Firebox M590 that I want to re propose with linux.
Sadly WG being WG..., it's super locked.
I removed only bootable drive (m2) and noticed that it's still getting grub...

Found, unsoldered and extracted firmware from only flash chip on board, it contains U-boot bootloader.
And that's where Im stuck, I need to modify it to boot from m2...

If there is any magician who knows how to do it, highly appreciated
Can create a thread if needed.

AAlexTryHarder I have a tricky one here. Got Firebox M590 that I want to re propose with linux....

melta101•12/3/24, 6:49 PM

sounds Nice
Is there a uEnv.txt present in uboot

melta101•12/3/24, 6:49 PM

and do you access to the uboot shell?

Mmelta101 sounds Nice Is there a uEnv.txt present in uboot

AlexTryHarder•12/3/24, 6:50 PM

I will be honest, I completely do not know anything about firmware itself.
Tried to do binwalk and dd to extract some of them, but I think offset was incorrect and I got a lot of garbage.
Im more than happy to share .bin

AAlexTryHarder I will be honest, I completely do not know anything about firmware itself. Tried...

melta101•12/3/24, 6:52 PM

Havnt done any reverse engg
So i dont know how to tackle this lol
If atleast the shell was accessible, there was a chance to change the boot at runtime.

Sounds like a fun project
Cheer!

Hope someone can help you

AlexTryHarder•12/3/24, 6:52 PM

Any tips how to attached myself to shell?

AAlexTryHarder Any tips how to attached myself to shell?

melta101•12/3/24, 6:53 PM

Are there any UART pins

Mmelta101 Are there any UART pins

melta101•12/3/24, 6:54 PM

You could connect it to a ftdi access serial port from there

AlexTryHarder•12/3/24, 6:54 PM

There is a serial, but it's goes straight to grub, with no edit option, that's why I did extraction

AlexTryHarder•12/3/24, 6:55 PM

binwalk shows that:

Offset    Size    Description
1096073    -    CRC32 polynomial table, little endian
1630121    -    U-Boot version string, "U-Boot 1.3.01.05 (Mar 31 2021 - 16:09:11 -0700)"
1670895    -    U-Boot version string, "U-Boot 1.3.01.05 (Mar 31 2021 - 16:09:11 -0700)"
1722958    -    U-Boot version string, "U-Boot 1.3.01.05 - Mar 31 2021 16:09:11"
1823681    -    Flattened device tree, size: 7138 bytes, version: 17
2100972    -    U-Boot version string, "U-Boot 1.3.01.05 (Mar 31 2021 - 16:09:11 -0700)' iommu.passthrough=1"
4194304    -    Flattened device tree, size: 1092272 bytes, version: 17
6291456    -    Flattened device tree, size: 9936 bytes, version: 17
6422528    -    Flattened device tree, size: 680 bytes, version: 17

Offset    Size    Description
1096073    -    CRC32 polynomial table, little endian
1630121    -    U-Boot version string, "U-Boot 1.3.01.05 (Mar 31 2021 - 16:09:11 -0700)"
1670895    -    U-Boot version string, "U-Boot 1.3.01.05 (Mar 31 2021 - 16:09:11 -0700)"
1722958    -    U-Boot version string, "U-Boot 1.3.01.05 - Mar 31 2021 16:09:11"
1823681    -    Flattened device tree, size: 7138 bytes, version: 17
2100972    -    U-Boot version string, "U-Boot 1.3.01.05 (Mar 31 2021 - 16:09:11 -0700)' iommu.passthrough=1"
4194304    -    Flattened device tree, size: 1092272 bytes, version: 17
6291456    -    Flattened device tree, size: 9936 bytes, version: 17
6422528    -    Flattened device tree, size: 680 bytes, version: 17

AlexTryHarder•12/3/24, 6:56 PM

In my noob firmware mind, I was hoping to just edit it and flash it back to chip

AAlexTryHarder In my noob firmware mind, I was hoping to just edit it and flash it back to chip...

melta101•12/3/24, 6:58 PM

It would've been that way if the HW was open source

AlexTryHarder•12/3/24, 6:59 PM

Damn watchguard

6k for hardware and still locked af

melta101•12/3/24, 6:59 PM

Have you tried typing boot to grub

Mmelta101 Have you tried typing boot to grub

AlexTryHarder•12/3/24, 7:01 PM

what you mean? On serial there is no edit option on grub entries. Either boot or boot to recovery
Both failing if hash of M2 is diffrent than original

AAlexTryHarder what you mean? On serial there is no edit option on grub entries. Either boot or...

melta101•12/3/24, 7:01 PM

I mean grub shell

AlexTryHarder•12/3/24, 7:01 PM

Oh, there is no grub shell, just predefined boot options

AlexTryHarder•12/3/24, 7:02 PM

something like that, without last option tho

AAlexTryHarder something like that, without last option tho

melta101•12/3/24, 7:02 PM

Press C

Mmelta101 Press C

AlexTryHarder•12/3/24, 7:03 PM

Box is at work, will try tomorrow and report back.
If that will work I will be suprised

melta101•12/3/24, 7:04 PM

Welp
All the best!

AlexTryHarder•12/3/24, 7:04 PM

Thanks, will let you know, could waste whole day on it!

melta101•12/3/24, 7:04 PM

May you resolder it back in 1 piece

Wwafa_ath Hi @Techist

Techist•12/4/24, 12:25 AM

Abstract? I'm a bit lost.
Please what's required of me in regards of my project presentation next week Wednesday?

Wwafa_ath That called tag collision in RFID, it's hardware limitation

fei•12/4/24, 3:44 AM

I see, if thats teh case im talking to the manufacturer agn

fei•12/4/24, 3:44 AM

it seems they do offer other alternatives with anti collision. I guess ill try that

TTechist Abstract? I'm a bit lost. Please what's required of me in regards of my project ...

wafa_athOP•12/4/24, 7:11 AM

Just a small abstract so i can make you a link.
Also @Afuevu is going to present today you can join to see how it goes

TTechist Abstract? I'm a bit lost. Please what's required of me in regards of my project ...

melta101•12/4/24, 7:13 AM

presenting something?

TTechist Abstract? I'm a bit lost. Please what's required of me in regards of my project ...

ZacckOsiemo•12/4/24, 7:14 AM

An abstract is a small paragraph explaining what you will present.

Ffei it seems they do offer other alternatives with anti collision. I guess ill try t...

wafa_athOP•12/4/24, 7:18 AM

Let us know how it goes. Also have you tried adjusting the reader settings as well?

Wwafa_ath Let us know how it goes. Also have you tried adjusting the reader settings as we...

fei•12/4/24, 7:18 AM

Yea, have been just playing with the reader settings for both EPC, TID and User data

fei•12/4/24, 7:18 AM

EPC just have better read ability compared to TID and User data, it seems or im just doing it wrong

fei•12/4/24, 7:19 AM

at 30dbm with some delay and filters when inventoring

Ffei Yea, have been just playing with the reader settings for both EPC, TID and User ...

wafa_athOP•12/4/24, 7:24 AM

Have you tried lowering the power slightly or tweaking the inventory delay to see if it helps with TID and User data? , (my brother used to work with it and install them ,i am taking advices from him )

Offset Size Description 1096073 - CRC32 polynomial table, little endian 1630121 - U-Boot version string, "U-Boot 1.3.01.05 (Mar 31 2021 - 16:09:11 -0700)" 1670895 - U-Boot version string, "U-Boot 1.3.01.05 (Mar 31 2021 - 16:09:11 -0700)" 1722958 - U-Boot version string, "U-Boot 1.3.01.05 - Mar 31 2021 16:09:11" 1823681 - Flattened device tree, size: 7138 bytes, version: 17 2100972 - U-Boot version string, "U-Boot 1.3.01.05 (Mar 31 2021 - 16:09:11 -0700)' iommu.passthrough=1" 4194304 - Flattened device tree, size: 1092272 bytes, version: 17 6291456 - Flattened device tree, size: 9936 bytes, version: 17 6422528 - Flattened device tree, size: 680 bytes, version: 17

Hi @Techist

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