1 Serial.begin() 2 Serial.end() 3 Serial.available() 4 Serial.read() 5 Serial.peek() 6 Serial.flush() 7 Serial.print() 8 Serial.println() 9 Serial.write() 10 Serial.serialEvent() Serial.begin() 串口波特率定义函数.一般取值300, 1200, 2400, 4800, 9600, 14400, 19200,