Omer Faruk Oruc OmerFarukOruc

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WSL2 with GUI using Xvnc

Note

If you want to use pure WSLg, you can try the new WSLg (XWayland) tutorial or the WSLg (Wayland) tutorial.

In this tutorial, we will setup GUI in WSL2, and access it using VNC. No additional software outside WSL (like VcXsrv) is required, except, of course, a VNC Viewer (RealVNC, TightVNC, TigerVNC, UVNC, etc, all of them might work flawlessly).

The key component we need to install is the desktop metapackage you want (GNOME, KDE, Xfce, Budgie, etc) and tigervnc-standalone-server.

For this setup, I will use Ubuntu (20.04, 22.04 and 24.04 are working), and install GNOME Desktop. Since the key components aren't bound to Ubuntu or GNOME, you can use your favorite distro and GUI. Check the [Sample

Download the image builder

git clone [email protected]:Robertof/nixos-docker-sd-image-builder.git
cd nixos-docker-sd-image-builder

Configure for Raspi4

modify /config/rpi4/default.nix to increase size of boot partition
- this step is optional but I ran out of space in /boot pretty quickly with the default setting since I'm still learning and rebuilding a lot. Let's leave some room for trial & error.
- sdImage.firmwareSize = 1024;
modify /config/sd-image.nix
./rpi3 becomes ./rpi4

Recipe: from MQTT to InfluxDB via Node-RED

2024-05-16 adds case study explaining how to extract values from topic strings, and how to specify the measurement name in the message payload provided to the "influxdb out" node.
2023-12-02 revise graphics to correspond with "influxdb out" node, and explain the pros and cons of InfluxDB 1.8 vs InfluxDB 2.

Introduction

Getting data produced by IoT sensors into a database is practically a mandatory step before effective visualisation (eg dashboards).

This recipe shows you how to get an MQTT payload into an InfluxDB database using three Node-RED nodes. It makes the following assumptions:

How to create an HTTPS certificate for localhost domains

This focuses on generating the certificates for loading local virtual hosts hosted on your computer, for development only.

Do not use self-signed certificates in production ! For online certificates, use Let's Encrypt instead (tutorial).

Reference - https://www.eriksmistad.no/getting-started-with-google-test-on-ubuntu/

sudo apt-get install libgtest-dev

sudo apt-get install cmake # install cmake

cd /usr/src/gtest

sudo cmake CMakeLists.txt

How to setup Let's Encrypt for Nginx on Ubuntu 18.04 (including IPv6, HTTP/2 and A+ SLL rating)

Virtual hosts

Let's say you want to host domains first.com and second.com.

Create folders for their files:

	import android.annotation.SuppressLint
	import androidx.compose.animation.core.animateDpAsState
	import androidx.compose.animation.core.animateFloatAsState
	import androidx.compose.foundation.Canvas
	import androidx.compose.foundation.background
	import androidx.compose.foundation.gestures.awaitFirstDown
	import androidx.compose.foundation.gestures.forEachGesture
	import androidx.compose.foundation.gestures.horizontalDrag
	import androidx.compose.foundation.layout.Arrangement.spacedBy
	import androidx.compose.foundation.layout.Box

	/*
	Application:
	- Interface water flow sensor with ESP32 board.

	Board:
	- ESP32 Dev Module
	https://my.cytron.io/p-node32-lite-wifi-and-bluetooth-development-kit

	Sensor:
	- G 1/2 Water Flow Sensor