So you are trying to program the Raspberry expansion PINS in Python, for example for this 3D LED Christmas Tree, and you’re getting the error:
GPIO.setup(self.number, GPIO.IN, self.GPIO_PULL_UPS[self._pull]) RuntimeError: Not running on a RPi!
I’m running this on Ubuntu 20.04LTS with a Raspberry 4.
The first thing:
Make sure you have an official Raspberry Pi charger.
Or at least, make sure your USB charger provides enough intensity to power the Raspberry and the LEDs.
The LED power comes from the motherboard and if Raspberry Pi has not enough energy this is not going to work.
My colleague Michela had her tree not working because of the charger was not able to provide enough energy. When she ordered a new charger, it worked like a charm.
Install the base Software
In order to communicate with General Purpose Input Output ports (GPIO) you need to install this Software:
I saw many people stuck, in the forums, because of that.
To work with the LEDs you need to run the samples as root.
Some code examples
To provide a bit of “the whole package” here are some simple examples.
Turn to red the LED’s one by one
from tree import RGBXmasTree
from time import sleep
o_tree = RGBXmasTree()
for o_pixel in o_tree:
o_pixel.color = (1, 0, 0)
sleep(0.1)
Turn to a different color, sleep, and again
from tree import RGBXmasTree
from time import sleep
o_tree = RGBXmasTree()
a_t_colors = [(1, 0, 0), (0, 1, 0), (0, 0, 1)]
for t_color in a_t_colors:
o_tree.color = t_color
sleep(1)
Turn off the lights
from tree import RGBXmasTree
o_tree = RGBXmasTree()
o_tree.color = (0, 0, 0)
I have updated CTOP.py so now it detects if is running in a Google GCP instance.
So the list of instances/type of virtualization detected is:
Amazon AWS
Google GCP
OpenStack
VirtualBox
Docker containers
LXC
I’m working in detecting Raspberry Pi, models running CTOP, and in enabling the plugins system so anybody can easily expand the functionality of ctop.py.
v.0.7.8 Commented annotations and type hinting, to make CTOP compatible with Python 3.5.0. Added Available RAM. Added Google GCP detection. Inform if it doesn't have permissions to decode DMI. Print the userId (numeric) and the User (string), like: 1000 carles or 0 root. Logic for swappiness <= 10 Ok, >10 and <= 30 warning, >30 red (alert). Reduced digits for swap to 2, to avoid confusions.
I have updated my book Python 3 Combat Guide, with another full cycle, step by step, to convert an ugly script that escapes to shell to a nice OOP code with Unit Testing, step by step.
I have updated my book ZFS for Ubuntu 20.04 LTS, adding how to create a pool and Datasets for home, sharing NFS for the Media Player.
If you like Star Wars and the Mandalorian, you may laugh has much as I did with this video:
As you see I’m writing more articles about Windows, Mac Os X, and proprietary Software. Some of my colleagues work in companies and use proprietary Software, so I’ll be writing more articles about those ecosystems. I spend more time now with colleagues working on all kind of projects, and with students that have other problems too, so I help them. However my main focus is Open Source, Architecture, Scaling, programming in Python and Java.
You know I love Linux. I was compiling my own Kernels back in 1995, when it took more than 24 hours in a 386, and working on the first ISPs in Barcelona managing the Linux Systems.
For my computers I prefer Linux, no doubt about it, but many multinationals I worked for have Windows option only for the Laptops and Desktops.
During years I had to deal with sending files to Linux or Unix (HP UX, Sun Solaris…) to process them and getting back the result. Some sort of ETL and Map Reduce in the prehistory of personal computers, taking in count aspects like Networks speeds too, available space, splitting files for processing.
When I was working as Senior Project Manager in Winterthur Insurance, now Axa, I had to run a lot of ETL (Extract Transform Load) for considerably big files, or when I was project manager and later head of department in Volkswagen gedas or later helping Start ups like Privalia. I can tell you that Windows didn’t like you to open editors to work with 1GB text or CSV file, and doesn’t like it, even if your computer has 16GB of Memory, and even if they do the simplicity of Bash scripts and using pipes, grep, awk… is so powerful that is very convenient to have those files processed using Linux.
And honestly is a pain to send back and forth files to a UNIX System just for Data Crunch. And a VM will be slow and use memory, and you have enable some sort of sharing with it so it can access the Data. Not to talk if you need to split the data files in blocks to be processed in parallel by several computers.
There are many solutions, like using Virtual Machines, Docker, external Servers, etc…
WSL allows you to run Linux command line tools inside Windows.
Having WSL allows things to be done much more straightforward, processing the files in your local windows hard drives.
Please note: Maybe you have enough using GitBash.
Error installing: WslRegisterDistribution failed with error: 0x80070057
When I installed it I found this error and look for an answer online. I found no solutions and many people suffering from the same problem, so I decided to publish an article on how to make it work.
Microsoft use Powershell to activate the features disabled in Windows, I did the same with Command Line, which I found more convenient for most of the non extremely tech people.
You will need:
For x64 systems: Version 1903 or higher, with Build 18362 or higher.
You can check your version of windows opening a Terminal (CMD.exe) and typing:
winver
For ARM64 systems: Version 2004 or higher, with Build 19041 or higher.
I’m not covering installing WSL for ARM, only for Intel/AMD Desktop/Laptops with Windows 10.
If you’re unsure, you can open a Terminal (CMD.exe) and run:
The recommended way to install Ubuntu on WSL is through the Microsoft Store.
The following Ubuntu releases are available as apps on the Microsoft Store:
Ubuntu 16.04 LTS (Xenial) is the first release available for WSL. It supports the x64 architecture only. (offline installer: x64)
Ubuntu 18.04 LTS (Bionic) is the second LTS release and the first one supporting ARM64 systems, too. (offline installers: x64, ARM64)
Ubuntu 20.04 LTS (Focal) is the current LTS release, supporting both x64 and ARM64 architecture.
Ubuntu (without the release version) always follows the recommended release, switching over to the next one when it gets the first point release. Right now it installs Ubuntu 20.04 LTS.
Each app creates a separate root file system in which Ubuntu shells are opened but app updates don’t change the root file system afterwards. Installing a different app in parallel creates a different root file system allowing you to have both Ubuntu LTS releases installed and running in case you need it for keeping compatibility with other external systems. You can also upgrade your Ubuntu 16.04 to 18.04 by running ‘do-release-upgrade’ and have three different systems running in parallel, separating production and sandboxes for experiments.
But if you prefer, instead of using the Windows Store, you can download the appx.
In the same page mentioned you can do it for several versions, I attach the link for Ubuntu 20.04 LTS: https://aka.ms/wslubuntu2004
Assuming you used the Windows Store, if you did not reboot and try now to execute it for the first time, or you go to the Command Line and write bash, or open Ubuntu from Windows menu, whatever method you use, you’ll get the abovementioned error.
If that happens to you, just reboot and when you open it will work and will start the install and ask for a user and password:
From here you’re able to update the system, execute the text commands available in Linux, access to the Windows drives, launch htop, git, Python3, apt, wget… copy and paste between windows and Linux terminal, share PATH…
And of course you can run CTOP.py
Take in count that the space reported in / partition is not real, and that you have a 4GB swap.
