tone()函数 tone(pin, frequency) tone(pin, frequency, duration) # 参数 pin: the pin on which to generate the tone frequency: the frequency of the tone in hertz - unsigned int duration: the duration of the tone in milliseconds (optional) - unsigned long to
arduino 套件使用说明书V1.0.pdf, 步进电机 DHT11 传感器另外一脚要接A0 /* Web client This sketch connects to a website (http://www.google.com) using an Arduino Wiznet Ethernet shield. Circuit: * Ethernet shield attached to pins 10, 11, 12, 13 created 18 Dec 2009 by David A