SoftwareSerial: peek()

[SoftwareSerial]

描述

Return a character that was received on the RX pin of the software serial port. Unlike read(), however, subsequent calls to this function will return the same character.

Note that only one SoftwareSerial instance can receive incoming data at a time (select which one with the listen() function).

參數

無

回傳

the character read, or -1 if none is available

範例

#include <SoftwareSerial.h>
 
// software serial : TX = digital pin 10, RX = digital pin 11
SoftwareSerial mySerial(10,11);
 
void setup()
{
  mySerial.begin(9600);
}
 
void loop()
{
  char c = mySerial.peek();
}

參考

• SoftwareSerial()
• SoftwareSerial.begin()
• SoftwareSerial.read()
• SoftwareSerial.print()
• SoftwareSerial.println()

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