Arduino, ATMega, AVR, IoT Tutorials for beginners to more experienced developers. Each project provides step-by-step instructions written in a way children can understand. And not just instructions - each step includes an explanation so you can understand how and why the code and wiring work. This will make it easy to create your own projects.
How to use port manipulation on AtMega328 and Arduino and port-to-pin mapping
How to create a realistic flame effect on Arduino
How to run your Arduino project on ATtiny85
First IoT project with MQTT
IoT, MQTT - How to send text messages and images to a mobile device
Control an IoT device from mobile phone over MQTT (takes a photo using ESP32 Cam and OV2640 camera)