Free online resources related to RTOS

Hi,

I have done many projects with ESP32 and ESP32-CAM but I know less about its FreeRTOS. What is the best free resource available online that you suggest me to see and study? My friend suggested an Udemy course but I have no international payment gateway to pay for an online course. So, I am looking for something free. Thanks.

Barsha

Have a look at this series of videos and lectures Introduction to RTOS by DigiKey and Shawn Hymel

https://www.digikey.com/en/maker/projects/what-is-a-realtime-operating-system-rtos/28d8087f53844decafa5000d89608016

Thank you. Hopefully it will be helpful for me.