Serial.available__ - jimaobian/DFRobotWikiCn GitHub Wiki
获取串口上可读取的数据的字节数。该数据是指已经到达并存储在接收缓存(共有64字节)中。available()继承自Stream实用类。 语法:
Serial.available()
Arduino Mega only: Serial1.available() Serial2.available() Serial3.available()
参数: �
返回值:
- 返回可读取的字节数
示例:
int incomingByte = 0; // for incoming serial data
void setup() {
Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
}
void loop() {
// send data only when you receive data:
if (Serial.available() > 0) {
// read the incoming byte:
incomingByte = Serial.read();
// say what you got:
Serial.print("I received: ");
Serial.println(incomingByte, DEC);
}
}
Arduino Mega example: ;
void setup() {
Serial.begin(9600);
Serial1.begin(9600);
}
void loop() {
// read from port 0, send to port 1:
if (Serial.available()) {
int inByte = Serial.read();
Serial1.print(inByte, BYTE);
}
// read from port 1, send to port 0:
if (Serial1.available()) {
int inByte = Serial1.read();
Serial.print(inByte, BYTE);
}
}