Done! Now sensors data is collecting by a powerful STM32 MCU with FreeRTOS. This will help adding even more sensors. For now, there are two:

• Ultrasonic Distance Sensor - HC-SR04
• KY-018 Photoresistor Module

Here is a video of the update in action:

Links:

• Updated source code with STM32 support
• Repository of my SharedVirtualRegisters library that I used in the update - it is thread-safe and supports FreeRTOS, but can work without any OS as well
• Repository of the logging library - it is a fork of the log.c library by rxi.

Photos bellow.