esp32 oled 

mqtt : onenet

public/t yao p

固件 yaossd1306_128x64_spiesp322

https://randomnerdtutorials.com/esp32-servo-motor-web-server-arduino-ide/

Installing the ESP32_Arduino_Servo_Library

The ESP32 Arduino Servo Library makes it easier to control a servo motor with your ESP32, using the Arduino IDE. Follow the next steps to install the library in your Arduino IDE:

Click here to download the ESP32_Arduino_Servo_Library. You should have a .zip folder in your Downloads folder

Unzip the .zip folder and you should getESP32-Arduino-Servo-Library-Masterfolder

Rename your folder fromESP32-Arduino-Servo-Library-MastertoESP32_Arduino_Servo_Library

Move the ESP32_Arduino_Servo_Libraryfolder to your Arduino IDE installation libraries folder

Finally, re-open your Arduino IDE