I downloaded the SDK based on RTOS on the official website. Now I want to import it into PIO for development and compilation. What should I do? Is there a relevant case
Due to outdated support of the ESP8266-RTOS-SDK, this is currently not possible with PlatformIO. See Outdated version of ESP8266 RTOS SDK · Issue #192 · platformio/platform-espressif8266 · GitHub.