Arduino HM-11 User Manual page 4

14） set the master-slave mode
Send: AT + ROLE [para1]
Send after a successful return: OK + Set: [para1]
Example Code
//master
/*
This example code is in the public domain.
*/
#include <SoftwareSerial.h>
SoftwareSerial mySerial(2, 3); // RX, TX
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.println("Goodnight moon!");
// set the data rate for the SoftwareSerial port
mySerial.begin(9600);
// set master
mySerial.print("AT+ROLE1");
delay(10000);
}
void loop() // run over and over
{
// set the data rate for the SoftwareSerial port
mySerial.print("test I am master ");
delay(10000);
if (mySerial.available())
Serial.write(mySerial.read());
if (Serial.available())
mySerial.write(Serial.read());
}
//slave
/*
This example code is in the public domain.
*/
#include <SoftwareSerial.h>
SoftwareSerial mySerial(2, 3); // RX, TX
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.println("Goodnight moon!");
// set the data rate for the SoftwareSerial port
mySerial.begin(9600);
// set slave
mySerial.print("AT+ROLE0");
delay(10000);
}
void loop() // run over and over
{
// set the data rate for the SoftwareSerial port
mySerial.print("test I am slave ");
delay(10000);
if (mySerial.available())
Serial.write(mySerial.read());
if (Serial.available())
mySerial.write(Serial.read());
}