# Demo Applications

- [1.GPIO port](https://guide.petoi.com/biboard/demo-applications/1.gpio-port.md): Operate the GPIO port of BiBoard
- [2.Serial port](https://guide.petoi.com/biboard/demo-applications/2.serial-port.md)
- [3.Analog-digital converter](https://guide.petoi.com/biboard/demo-applications/3.analog-digital-converter.md): Application of  ADC which is variable gain on BiBoard (ESP32)
- [4.Digital-Analog Converter](https://guide.petoi.com/biboard/demo-applications/4.digital-analog-converter.md): The usage of DAC
- [5.EEPROM (Electrically Erasable Programmable read only memory)](https://guide.petoi.com/biboard/demo-applications/5.eeprom.md)
- [6.Gyro IMU（MPU6050）](https://guide.petoi.com/biboard/demo-applications/6.gyro-imu-mpu6050.md)
- [7.Infrared remote control](https://guide.petoi.com/biboard/demo-applications/7.infrared-remote-control.md)
- [8.PWM(Pulse Width Modulation)](https://guide.petoi.com/biboard/demo-applications/8.pwm.md)
- [9.Servo(under construction)](https://guide.petoi.com/biboard/demo-applications/9.servo.md)
- [10.Classic Bluetooth serial port SPP](https://guide.petoi.com/biboard/demo-applications/10.classic-bluetooth-serial-port-spp.md)
- [11.Bluetooth low energy (BLE) serial port pass-through](https://guide.petoi.com/biboard/demo-applications/11.bluetooth-low-energy-ble-serial-port-transparent-transmission.md)
- [12.File system SPIFFS](https://guide.petoi.com/biboard/demo-applications/12.file-system-spiffs.md): ESP32 File System SPIFFS Configuration Guide
- [13.Add hardware partition configuration option in Arduino IDE](https://guide.petoi.com/biboard/demo-applications/13.add-hardware-partition-configuration-option-in-arduino-ide.md)
- [14.Play MP3](https://guide.petoi.com/biboard/demo-applications/14.play-mp3.md)
- [15.The usage of Wi-Fi OTA(Over-The-Air)](https://guide.petoi.com/biboard/demo-applications/15.the-usage-of-wifi-ota.md): The Arduino demo of ESP32 provides the function of OTA (updating/uploading a new program to ESP32 using Wi-Fi)


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