1、class Pin - control I/O pins

2、class ADC - analog to digital converter

3、class PWM - pulse width modulation

4、class Servo - 3-wire pwm servo driver

5、class UART - serial communication bus

6、class I2C - IIC bus

7、class Remote - remote with ble

8、class IOT - internet of things

9、class Music - notes and beats

10、class Color - rgb color

11、class TTS - text to speech

12、class IRQ - external interrupter

13、class WiFi - Wi-Fi set up

14、class Taskmgr - task manager

15、class SendMail - email library

16、class Ultrasonic - ultrasonic ranging sensor

17、class DS18X20 - ds18x20 series temperature sensor

18、class ADXL345 - accelemeter

19、class RGB_LED - rgb LED

20、class Buzzer - passive buzzer

21、class Sound - sound sensor

22、class Joystick - 3-axis joystick

23、class LED - led driver

24、class Switch - switches

25、class BLE - bluetooth driver