Software was designed for Atmel Studio 7 (v 7.0.1416) It is nececary to install Arduino IDE (I used 1.8.3 version)

My HW:

Mega 2560 R3 CH340G (Excessive solution, you can use Arduino Uno) https://ru.aliexpress.com/item/Mega-2560-CH340G-ATmega2560-16AU-Compatible-for-Arduino-Mega-2560/32517341214.html?spm=a2g0s.9042311.0.0.zGh2A6

Arduino Multifunctional Multi-functional Expansion Development Board https://ru.aliexpress.com/item/1pcs-for-Arduino-Multifunctional-Multi-functional-Expansion-Development-Board-Base-Learning-UNO-LENARDO-Mega-2560-Shield/32664675055.html?spm=a2g0s.9042311.0.0.zGh2A6

three DS18b20 temp sensors in metal case https://ru.aliexpress.com/item/Stainless-Steel-Package-1-Meters-Waterproof-DS18b20-Temperature-Probe-Temperature-Sensor-18B20/32359386131.html?spm=a2g0s.9042311.0.0.zGh2A6

How to:

How to flash the Arduino from the Atmel Studio: https://slightlyovercomplicated.com/2015/11/13/programming-arduino-with-atmel-studio-7/