You have to make sure the esp-idf version you grab the example from matches the version used by platformio You are completely right: I saw the 4.0-dev version, but PlatformIO was using 3.2.x I changed it and it worked. For all other users which are reaching this problem: I used this version: https:...

I am working with PlatformIO. First off: I am a noob to esp-idf. So please don't judge that hard. I am using a Heltec ESP32 board with Wifi. A simple printf("Hello") is compiling and working. I also tried the Arduino Example (with Arduino framework), that worked. If I copy/paste your WPS Wifi exampl...