The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Hardware Development’ Category

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MotionEyeOS on Odroid C1+ with Logitech USB web cameras

Posted by jpluimers on 2018/10/11

Hopefully I get this to work after fixing

The first part of the fix was to

  1. re-image the SD card.
  2. boot
  3. wait 5 minutes (there is no output on HDMI apart from some flickering and no output on TTY using 115200 bits/second despite trying [WayBack] en:c1_hardware_uart [ODROID Wiki])

The second part is getting the USB web cameras to work.

I’ve got two types, but the label on them doesn’t list their common name, only their P/N sometimes with M/N:

  1. P/N 860-000049 M/N V-UBC40 (really old USB cameras)
  2. P/N 860-000334 (new USB camera)

The MotionEyeOS web interface didn’t list any working cameras so I had to do some digging.

Luckily [WayBack] Webcam software and driver support for Windows has a table of part and model numbers combined with product names, so they got revealed them as these:

  1. P/N 860-000334 = M/N V-U0028  with name HD Pro Webcam C920
  2. P/N 861225 = M/N V-UBC40 with name Quick Cam Messenger
    (which is funny as the P/N on the label is different)

Both are supported by motion according to [WayBack] Logitech < Motion < Foswiki though the Quick Cam Messenger needs [WayBack] Quickcam Messenger & Communicate driver for Linux which I should try to cross-compile one day.

The latter works fine. Below are some settings I used.

Read the rest of this entry »

Posted in *nix, Development, Hardware Development, Linux, Odroid, Power User | Leave a Comment »

Giving up on the official Ubuntu for Odroid C1 image

Posted by jpluimers on 2018/10/09

After the trouble in Ubuntu: Fixing the myserious “Failed to stop apt-daily.timer: Connection timed out” I got into more trouble:
apt-get update && apt-get upgrade hung the device.

It booted fine, but a new update showed it was in a hosed state.

I don’t expect vendor supported distributions to fail this way, so I gave up on the ubuntu-16.04-minimal-odroid-c1-20160817.img.xz .

–jeroen


root@odroidC1:~# apt-get update && apt-get upgrade
Hit:1 http://ports.ubuntu.com/ubuntu-ports xenial InRelease
Hit:2 http://ports.ubuntu.com/ubuntu-ports xenial-updates InRelease
Hit:3 http://ports.ubuntu.com/ubuntu-ports xenial-backports InRelease
Hit:4 http://ports.ubuntu.com/ubuntu-ports xenial-security InRelease
Hit:5 http://deb.odroid.in/c1 xenial InRelease
Reading package lists… Done
E: dpkg was interrupted, you must manually run 'dpkg –configure -a' to correct the problem.
root@odroidC1:~# dpkg –configure -a
Processing triggers for ureadahead (0.100.0-19) …
Setting up initramfs-tools (0.122ubuntu8.8) …
update-initramfs: deferring update (trigger activated)
Processing triggers for systemd (229-4ubuntu17) …
Processing triggers for initramfs-tools (0.122ubuntu8.8) …
update-initramfs: Generating /boot/initrd.img-4.4.0-28-generic
WARNING: missing /lib/modules/4.4.0-28-generic
Ensure all necessary drivers are built into the linux image!
depmod: ERROR: could not open directory /lib/modules/4.4.0-28-generic: No such file or directory
depmod: FATAL: could not search modules: No such file or directory
depmod: WARNING: could not open /var/tmp/mkinitramfs_FQEGW2/lib/modules/4.4.0-28-generic/modules.order: No such file or directory
depmod: WARNING: could not open /var/tmp/mkinitramfs_FQEGW2/lib/modules/4.4.0-28-generic/modules.builtin: No such file or directory
root@odroidC1:~# df -h
Filesystem Size Used Avail Use% Mounted on
udev 396M 0 396M 0% /dev
tmpfs 81M 3.3M 78M 5% /run
/dev/mmcblk0p2 59G 1.1G 55G 2% /
tmpfs 403M 0 403M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 403M 0 403M 0% /sys/fs/cgroup
/dev/mmcblk0p1 128M 11M 118M 9% /media/boot

view raw

giving-up-on-ubuntu-image-for-odroid-c1.txt

hosted with ❤ by GitHub

Posted in Development, Hardware Development, Odroid | 3 Comments »

Raspberry Pi Power Limitations – Raspberry Pi Stack Exchange

Posted by jpluimers on 2018/10/04

There are very many, often contradictory, claims about the power requirements and limitations of the Pi. What are the exact requirements?

has a very elaborate answer at [WayBack] Raspberry Pi Power Limitations – Raspberry Pi Stack Exchange covering all non-zero models.

I’ve archived some of the links it points to:

And some links on how to power a Raspberry Pi when you only have a 12V power source:

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Posted in Development, Hardware Development, Raspberry Pi | Leave a Comment »

Not cool: openSuse Tumbleweed switched DHCP clientID algorithm on Raspberry Pi 3, so now all devices get a non-static DHCP address

Posted by jpluimers on 2018/09/15

Not sure in which changeset this happened, but here is one example:

  1. old DHCP client ID 1:b8:27:eb:1a:b1:ec
  2. new DHCP client ID ff:eb:78:a9:4:0:1:0:1:22:6:67:49:b8:27:eb:78:a9:4

The first one was marked static in the DHCP server, which means the Raspberry Pi now did get a different IP address.

This messes up a few places that cannot do proper address resolution.

Anyone who knows where this has changed / is configured?

These did not help finding the cause:

Edit

As commented by Leen below, this is about

Wicked changed its defaults to use this DHCPv6 compatible RFC4361 client-id in favour of the older RFC2132 client-id. However, this has caused some issues with older DHCPv4 servers and existing setups where the client-id stored by the server is used to assign a (static) address. It is recommended to fix this server-side, but still, wicked provides several ways of addressing this issue

So here are some links:

–jeroen

Posted in *nix, Hardware Development, Linux, openSuSE, Power User, Raspberry Pi, SuSE Linux, Tumbleweed | 6 Comments »

DFRobot 7″ HDMI Display with Touchscreen Sells for $69 – for use with Raspberry Pi or Adruino

Posted by jpluimers on 2018/09/10

There are plenty of HDMI displays, but if you want a smaller size it become more complicated although some 7″ HDMI displays are available. However, if you

Source: [Archive.is] DFRobot 7″ HDMI Display with Touchscreen Sells for $69

Via: [Archive.is] 7″ HDMI touchscreen display with mounting holes for +Raspberry Pi board. – Jean-Luc Aufranc – Google+

–jeroen

Posted in Development, Hardware Development, Power User, Raspberry Pi | Leave a Comment »

MUSTOOL MT8206 Multimeter & Oscilloscope Goes for $42 (Promo)

Posted by jpluimers on 2018/09/09

The coupon for the Promo worked yesterday, so you might want to try it if you like a scope in a multimeter form factor: [WayBack] MUSTOOL MT8206 Multimeter & Oscilloscope Goes for $42 (Promo).

MUSTOOL MT8206 looks like a standard digital multimeter, but the device is actually a 2-in-1 device that also serves as a oscilloscope. Banggood have the…

Via [WayBack] New 2-in-1 digital multimeter + oscilloscope selling for ~$42 shipped for a limited time – Jean-Luc Aufranc – Google+

–jeroen

Posted in Development, Hardware Development, Power User | Leave a Comment »

LiFePO4wered/Pi+ | Crowd Supply

Posted by jpluimers on 2018/09/07

A few days left for [WayBack] LiFePO4wered/Pi+ | Crowd Supply: A full-featured LiFePO4 battery, power manager, and UPS for the Raspberry Pi

via:

–jeroen

 

 

Posted in Development, Hardware Development, Power User, Raspberry Pi | Leave a Comment »

cool solution for precise point positioning (PPP) GPS/GLONASS navigation on Raspberry Pi…

Posted by jpluimers on 2018/08/31

cool solution for precise point positioning (PPP) GPS navigation.The RasPiGNSS “Aldebaran” expansion board fits onto the Pi’s expansion connector (named P1).

Source: Hi all, I found this cool solution for precise point positioning (PPP) GPS na…

Device: Dr. Franz Fasching » Products » GNSS » RasPiGNSS [WayBack]

–jeroen

Posted in Development, Hardware Development, IoT Internet of Things, Network-and-equipment, Power User, Raspberry Pi | Leave a Comment »

(35) Enabling New Hardware in U-Boot – Jon Mason, Broadcom Ltd. – YouTube

Posted by jpluimers on 2018/07/20

Lots of interesting information, especially these discussions where Alexander Graf chipped in:

The hand off of the boot loader to the actual OS payload. The payload and U-boot are in memory running at the same time. The payload can call back into U-boot through the uEFI API that U-boot implements so that the payload provides extra drivers enabling for instance a subsequent graphical stage (splash screen, menus, etc), more hardware access and so on. You even could pass ACPI tables through U-boot to the payload and help shooting yourself in the foot.

Important aspects for upstreaming:

  • keep commits short so they are easy to review
  • make sure patches are always rebaseable for each and every commit set (so it compiles throughout)
  • this tremendously helps doing a git bisect
  • it makes adding features that other parts depend on hard: you need to think on chicken & egg situations in advance

–jeroen

 

Posted in *nix, Development, Hardware Development, Linux, Power User, Software Development, U-Boot | Leave a Comment »

Hacking the Logitech C920 & C930e Webcams – Graves On SOHO Technology

Posted by jpluimers on 2018/07/20

This could turn out in a way better quality and cheaper CCTV system than Ring offers: [WayBack] Hacking the Logitech C920 & C930e Webcams – Graves On SOHO Technology.

via: [WayBack] Until recently I did not know that this was possible, but people are hacking the venerable Logitech C920 and C930e webcams. – Lars Fosdal – Google+

–jeroen

Some nice pictures of stereo camera configuration by Joe C Hecht at https://plus.google.com/+JeroenPluimers/posts/9T8u82E8rH2

Read the rest of this entry »

Posted in Development, Hardware Development, LifeHacker, Power User | Leave a Comment »

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