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 ‘Raspberry Pi’ Category

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Need to play with this: Raspberry Pi web simulator from Microsoft Corporation

Posted by jpluimers on 2018/12/26

It’s been a while since [WayBack] +Microsoft Corporation has recently released a preview version of an open source +Raspberry Pi web simulator where you can connect sensors and component… – Jean-Luc Aufranc – Google+

Back then it was convoluted to get going. Hopefully by now that has changed.

So time to take another look during the holiday season:

 

It reminded me a lot of [WayBack] Bring ideas to life with free online Arduino simulator and PCB apps | Autodesk Circuits (a.k.a. circuits.io):

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Posted in *nix, Development, Hardware, Hardware Development, Hardware Interfacing, Linux, Power User, Raspberry Pi, Software Development | Leave a Comment »

SSH: Connection Reset by Peer – Server Fault

Posted by jpluimers on 2018/11/22

One occasion I had SSH throw a Connection Reset by Peer on my when was the SD-card of a Raspberry Pi started failing and the ext4 filesystem got mounted in read-only mode.

Then sshd was still listening on port 22, but since it could not write to disk any more, it threw a Connection Reset by Peer to the client.

It was on OpenSuSE Tumbleweed, but would failed just as well using Raspbian.

Lessons learned:

  • IoT hardware will fail.
  • ext4 breaks when the hardware breaks.

–jeroen

Reference:

Posted in *nix, *nix-tools, Debian, Development, Hardware Development, IoT Internet of Things, Linux, Network-and-equipment, openSuSE, Power User, Raspberry Pi, Raspbian, SuSE Linux, Tumbleweed | Leave a Comment »

Hopefully this is now available: in March you could pre-order the PoE hat for the Raspberry Pi 3 B+ at ~ EUR 15.

Posted by jpluimers on 2018/10/22

Wow, EUR 15 is almost half the price of an Raspberry Pi 3 B+:

[WayBack] RPI3-MODBP-POE RASPBERRY-PI, Add-On Board, Power over Ethernet (PoE) HAT for Raspberry Pi 3 Model B+ | Farnell UK

Via:

–jeroen

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

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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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 »

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 »

LEGO Macintosh classic with Wi-Fi and e‑paper display running docker

Posted by jpluimers on 2018/07/06

A Wi-Fi enabled 1990 Macintosh Classic built with LEGO, powered by a Raspberry Pi Zero running docker and a 2.7″ e-paper display by EmbeddedArtists.

Cool stuff!

Source: [Archive.is] LEGO Macintosh classic with Wi-Fi and e‑paper display running docker

Via: [WayBack] This guy built a (kind of) working Lego Macintosh, and now you can too … | 9to5Mac

This should run well with a Classic Color Macintosh System 7 emulated on Raspberry Pi: [WayBack] On this tutorial I show you how to run Mac II OS color on your Raspberry PI, I have also included a compiled version for Windows. Running Mac OS 7 on Raspberry Pi with Color – Novaspirit

via:

ROM images: [WayBack] Index of /pub/software/ROM/Macintosh 68K

–jeroen

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Posted in Apple, Classic Macintosh, Development, Hardware Development, History, Macintosh SE/30, Power User, Raspberry Pi | Leave a Comment »

Raspberry Pi zero W notes

Posted by jpluimers on 2018/07/06

Launch dates:

Now you only need a memory card and a camera module to make a nice “CCTV” system with plenty of choice. More details here:

Depending on what and when you record video, you might want to consider an IR capable camera. In Raspberry Pi land, they call them NOIR (which stands for No IR, meaning they leave out the IR filter which means they can record IR).

–jeroen

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

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