### Basic Infos repeated issue as mentioned in "sdk update 2.1.0" branch #### Hardware Hardware: not relevant Core Version: 2.1.0-rc2 ### Description deepsleep argument for µs is uint64 in sdk but only uint32 in esp8266 core compare definitions in esp8266/cores/esp8266/Esp.h vs. esp8266/tools/sdk/include/user_interface.h ### Settings in IDE not relevant ### Sketch not relevant ### Debug Messages not relevant messages here see attached diff [Esp_core.diff.txt](https://github.com/esp8266/Arduino/files/1385269/Esp_core.diff.txt)