Temple of Divine Mother
When using this library, your sketch must include the following headers in order for the ESP8266 to function correctly as a standalone device:
Visit the official (github.com).
This is the most straightforward error. It means the Arduino IDE's compiler cannot find the Blynk library.
For older manual releases, you may need to copy multiple folders (like Blynk , BlynkESP8266_Lib , and SimpleTimer ) individually to the libraries folder . Essential Code Structure