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by rin67630
Fri Jan 17, 2020 8:54 pm
Forum: General discussion
Topic: Raspberry Pi 4 GPIO readall broken
Replies: 4
Views: 90

Re: Raspberry Pi 4 GPIO readall broken

That one worked:
To upgrade:

Code: Select all

cd /tmp
wget https://project-downloads.drogon.net/wiringpi-latest.deb
sudo dpkg -i wiringpi-latest.deb
by rin67630
Fri Jan 17, 2020 8:46 pm
Forum: General discussion
Topic: Raspberry Pi 4 GPIO readall broken
Replies: 4
Views: 90

Re: Raspberry Pi 4 GPIO readall broken

Hmm that does not sound good... The instructions to install V2.52 are broken: git clone git://git.drogon.net/wiringPi Cloning into 'wiringPi'... fatal: unable to connect to git.drogon.net: git.drogon.net[0: 188.246.205.22]: errno=Connection refused git.drogon.net[1: 2a03:9800:10:7b::2]: errno=Networ...
by rin67630
Fri Jan 17, 2020 8:39 pm
Forum: General discussion
Topic: How to control one Pi from another over Ethernet?
Replies: 13
Views: 247

Re: How to control one Pi from another over Ethernet?

. And your method includes rebuilding the OS on every machine which is totally bizarre ! Absolutely not! I just clone my master and change the hostname. That's it!... Ok, your method includes building a new SD card image for every machine which is totally unnecessary. PeterO "Which is totally unnec...
by rin67630
Fri Jan 17, 2020 8:28 pm
Forum: General discussion
Topic: Raspberry Pi 4 GPIO readall broken
Replies: 4
Views: 90

Raspberry Pi 4 GPIO readall broken

Hi apparently WiringPi is broken on the Pi 4 I have updated / upgraded buster and when i invoke GPIO readall, i get gpio readall Oops - unable to determine board type... model: 17 when I invoke gpio -v I get gpio version: 2.50 Copyright (c) 2012-2018 Gordon Henderson This is free software with ABSOL...
by rin67630
Fri Jan 17, 2020 4:06 pm
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 213
Views: 5845

Re: Future of raspberry pi - software related

Just been joking:
regarding the worldwide success of Raspberry Pi, we will soon be needing an integrated virus scanner by default!
That is the consecration of real success.

:lol: :lol: :lol:
by rin67630
Fri Jan 17, 2020 2:31 pm
Forum: General discussion
Topic: How to control one Pi from another over Ethernet?
Replies: 13
Views: 247

Re: How to control one Pi from another over Ethernet?

PeterO wrote:
Fri Jan 17, 2020 9:34 am
.
And your method includes rebuilding the OS on every machine which is totally bizarre !
Absolutely not!
I just clone my master and change the hostname. That's it!...
by rin67630
Fri Jan 17, 2020 2:26 pm
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 213
Views: 5845

Re: Future of raspberry pi - software related

I don't think that would be possible, and would probably be detrimental to most other users with modern displays if we tried. We don't actually make a screen that small... But: -Adafruit does https://learn.adafruit.com/adafruit-pitft-3-dot-5-touch-screen-for-raspberry-pi/overview -Seed does https:/...
by rin67630
Fri Jan 17, 2020 11:46 am
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 213
Views: 5845

Re: Future of raspberry pi - software related

Just a mini-improvement:
Piclone could mention the time consumed after a copy was completed, that gives a good evaluation of the quality of the SD card used.
by rin67630
Fri Jan 17, 2020 11:44 am
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 213
Views: 5845

Re: Future of raspberry pi - software related

Oh and I just forgot: Make sure that all important config screens are small enough to fit e.g into the QVGA 480*320 LCD screen! Currently the Raspberry Pi config, panel preferences, LX terminal config etc...screens are too tall and the OK buttons are out of reach, being located outside of the screen...
by rin67630
Fri Jan 17, 2020 9:22 am
Forum: General discussion
Topic: How to control one Pi from another over Ethernet?
Replies: 13
Views: 247

Re: How to control one Pi from another over Ethernet?

Sounds like ssh access would do what you need. Step 1: Make sure SSH is enabled in the headless PIs using "Interfaces" tab on "Raspberry Pi Configuration" in the Preferences menu OR use the command line version "raspi-config" (You'll need to run it with sudo and choose "5 Interfacing Options" then ...
by rin67630
Fri Jan 17, 2020 9:04 am
Forum: General discussion
Topic: How to control one Pi from another over Ethernet?
Replies: 13
Views: 247

Re: How to control one Pi from another over Ethernet?

Suppose I have an Ethernet router, with one internet input, and 3 ports each going to separate Raspberry Pis. Suppose 1 of them is a Pi4B as the main computer, with mouse/keyboard/HDMI screen attached. The others don't (are just connected to Ethernet). How can my Raspberry pi, connect to, and steer...
by rin67630
Fri Jan 17, 2020 8:41 am
Forum: General discussion
Topic: Marking posts as outdated
Replies: 6
Views: 140

Marking posts as outdated

Hi admins, I suppose you are using a generic bulletin board software, aren't you? Else I would find a possibility to mark older posts containing instructions that are today outdated very useful. Or have the possibility to mark the software version to which it applies? Just my 2 cents for the case......
by rin67630
Fri Jan 17, 2020 8:32 am
Forum: Picademy
Topic: VNC instructions (Pi remote desktop)
Replies: 29
Views: 74405

Re: VNC instructions (Pi remote desktop)

Please not that the initial explanations from 2014 are completely outdated.
Now its as simple as enabling VNC in Preferences/Raspberry Pi Configuration.
by rin67630
Fri Jan 17, 2020 6:10 am
Forum: Troubleshooting
Topic: Raspberry pi 4 get really hot
Replies: 14
Views: 351

Re: Raspberry pi 4 get really hot

I touch the capacitor lightly and one of its legs has broken :o . Do you know the value of this capacitor? I will replace a new one. According to the schematic it should be a 22μF 6,3v But you ought to have asked for a warranty. Now it's probably too late... By the way I measured the temperatures o...
by rin67630
Thu Jan 16, 2020 10:01 pm
Forum: General discussion
Topic: Which distro for a RPi1B 512MB for decent Wikipedia web browsing?
Replies: 8
Views: 266

Re: Which distro for a RPi1B 512MB for decent Wikipedia web browsing?

You must have something broken in your installation. I have here a PiZW which has the same processor and memory as a Pi1 which runs Raspbian Buster and it uses only 96MB of 432MB available. With Chromium displaying the Wikipedia page Raspberry Pi the memory grows to 201MB. The page is rendered 100% ...
by rin67630
Thu Jan 16, 2020 8:02 pm
Forum: Troubleshooting
Topic: Raspberry pi 4 get really hot
Replies: 14
Views: 351

Re: Raspberry pi 4 get really hot

Oh man what is that capacitor for? Can raspberry pi work without it? I think soder start melting and the capacitor is falling out. A capacitor should not get hot unless it is defective or notoriously overloaded. Here is a thermal image of a Raspberry Pi https://twitter.com/ghalfacree/status/1147627...
by rin67630
Thu Jan 16, 2020 4:32 pm
Forum: Troubleshooting
Topic: Reinstall Sd card copier
Replies: 2
Views: 91

Re: Reinstall Sd card copier

I finally got it:
sudo apt install piclone

Hmm ... Almost!

it starts, but cannot select any disk!
by rin67630
Thu Jan 16, 2020 4:24 pm
Forum: Troubleshooting
Topic: Reinstall Sd card copier
Replies: 2
Views: 91

Reinstall Sd card copier

Hi,
I have lost SD-Card-Copier. ow to reinstall it?
Thank you
by rin67630
Wed Jan 15, 2020 12:59 pm
Forum: General discussion
Topic: How could I send a GPIO pulse upon a programmed shutdown?
Replies: 6
Views: 164

Re: How could I send a GPIO pulse upon a programmed shutdown?

Add a oneshot systemd service that pulses your GPIO that runs after final.target. It'll run it just before remounting / readonly. If you want to do it at the last possible moment before reboot/shutdown then add a script to /usr/lib/systemd/system-shutdown All services are shutdown and / is readonly...
by rin67630
Wed Jan 15, 2020 12:48 pm
Forum: Troubleshooting
Topic: Headless over VNC Error Message Failed to fork (Cannot allocate memory)
Replies: 2
Views: 54

Workaround: Headless over VNC Error Message Failed to fork (Cannot allocate memory)

I found the culprit: LXpanel eats 210MB memory!

But If I kill that process I could not launch anything, and not reboot.

I finally found a workaround: I changed a LXpanel setting from "left" to "top" and bingo!

LXpanel shrinked to 20MB and became responsive again.

I filed an issue in GitHub.
by rin67630
Wed Jan 15, 2020 11:40 am
Forum: Troubleshooting
Topic: Headless over VNC Error Message Failed to fork (Cannot allocate memory)
Replies: 2
Views: 54

Headless over VNC Error Message Failed to fork (Cannot allocate memory)

Hi on some of my headless systems (Raspbian Buster) connected over VNC cloud, I get the error Error Message Failed to fork (Cannot allocate memory) whenever I try to launch any window (including the terminal and including the shutdown menu). The only window I can start is the Task Manager upon issui...
by rin67630
Wed Jan 15, 2020 9:46 am
Forum: General discussion
Topic: Future of raspberry pi - software related
Replies: 213
Views: 5845

Re: Future of raspberry pi - software related

I have not much hope to convince, but I do find Processing to be a very good approach to teach serious programming. It is a complete ecosystem around Java, but can cope with Python or other languages as well. The most important thing it that it has a huge organized library of ready-made searchable e...
by rin67630
Tue Jan 14, 2020 8:46 pm
Forum: General discussion
Topic: pi4 with previous pi3 card?
Replies: 6
Views: 161

Re: pi4 with previous pi3 card?

MuntyScruntfundle wrote:
Tue Jan 14, 2020 1:32 pm
Should a pi4, with the same power provided to the header block, boot from a pi3 maintained (fully up to date) Raspbian install, or should I start with a fresh flash?
Answered here:
https://www.raspberrypi.org/forums/view ... 9#p1594419
by rin67630
Tue Jan 14, 2020 4:55 pm
Forum: Java
Topic: Did someone succeed in installing Processing and...
Replies: 0
Views: 40

Did someone succeed in installing Processing and...

Did someone succeed in installing Processing and compile a working stand alone application? I installed Processing, it runs well and runs the example sketches within Processing. If I want to export the example application, it creates the application in folders for Linux 32, Linux 64, LinuxARM32 and ...
by rin67630
Tue Jan 14, 2020 1:46 pm
Forum: Device Tree
Topic: Pi-4 Activating additional UART ports
Replies: 53
Views: 14624

Re: Pi-4 Activating additional UART ports

I wrote: (at the point of probing, which is after the "gpio ..." handling) No pin function can be set (until the kernel boots, at which point the HAT probing is long since finished) except via the firmware. What is the right statement? Could you recommend a lecture about the corresponding steps of ...

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