Project 20.1 I2C LCD1602..................................................................................................................................................... 220
Chapter 21 Hygrothermograph DHT11................... 230
Project 21.1 Hygrothermograph........................................................................................................................................ 230
Chapter 22 Matrix Keypad ............................................. 237
Project 22.1 Matrix Keypad.................................................................................................................................................. 237
Chapter 23 Infrared Motion Sensor........................... 247
Project 23.1 Sense LED.......................................................................................................................................................... 247
Chapter 24 Ultrasonic Ranging.................................... 253
Project 24.1 Ultrasonic Ranging......................................................................................................................................... 253
Chapter 25 Attitude Sensor MPU6050 ..................... 261
Project 25.1 Read MPU6050................................................................................................................................................ 261
Chapter 26 WebIOPi & IOT ........................................... 269
Project 26.1 Remote LED ...................................................................................................................................................... 269
Chapter 27 Solder Circuit Board ................................. 274
Project 27.1 Solder a Buzzer ............................................................................................................................................... 274
Project 27.2 Solder a Flowing Water Light..................................................................................................................... 278
What's next? ......................................................................... 286
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