Here you can find various articles that may be of interest to you...

Robotics:
ROS
MyRobotLab
Robots, you can make them yourself too!
LoRa:
Dragino LHT65 met externe lichtsensor
Dragino LHT65 als brievenbus sensor
Dragino LDS02 magneetcontact sensor
Virtualization:
Install Docker & Docker compose
3d printing:
3D-printing
Home Assistant:
Configuring an ESP32 camera
Crafting with electronics:
Arduino tinkering

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All sorts of things:
Heimdall Dashboard