Greetings! I am following SMART HOME with Raspberry Pi, ESP32, and ESP8266 V1.1 at section 5.2.  When I download and run the sketch for ESP8266 everything works fine. When I try to compile the ESP32 sketch I get the following error: “Compilation error: ‘LED_BUILTIN’ was not declared in this scope” at line 116 and 119. I’m using an ESP 32 WROOM 32D. The WIFISCAN example works OK for both boards. I tried sweet talking to it but it still wouldn’t behave.   Any suggestions?