No connection to AT-09

Other Hardware General Electronics
1

Hi all,

I have a problem with pairing my AT-09 with my laptop.
I can see the AT-09 bluetooth signal, can insert the pin but the connection fails.
However, on my mobile phone with the app LightBlue, I can connect to the AT-09 and send and receive data. There, I do not have to insert a pin, which surprise me.
My windows laptop has BLE support and I tried to pair it via the default way "add bluetooth device" and a selfmade C# programm, but non of them worked.

Here is the AT-09 code:

#include <SoftwareSerial.h>

SoftwareSerial mySerial(3, 4); // RX, TX


void setup() {
  // put your setup code here, to run once:
  mySerial.begin(9600);
  Serial.begin(9600);

  sendCommand("AT");
  sendCommand("AT+ROLE0");
  sendCommand("AT+TYPE2");
  sendCommand("AT+UUID0xFFE0");
  sendCommand("AT+CHAR0xFFE1");
  sendCommand("AT+NAMESTRIVE");
  sendCommand("AT+PIN1234");
  
}

void sendCommand(const char * command) {
  Serial.print("Command send :");
  Serial.println(command);
  mySerial.println(command);
  //wait some time
  delay(100);

  char reply[100];
  int i = 0;
  while (mySerial.available()) {
    reply[i] = mySerial.read();
    i += 1;
  }
  //end the string
  reply[i] = '\0';
  Serial.print(reply);
  Serial.println("Reply successful");
  delay(50);
}

void writeSerialToBLE(int value) {
  mySerial.println(value);
}

void writeToBLE(char value) {
  Serial.print("Writing hex :");
  Serial.println(value, HEX);
  mySerial.write(value);
}

char j = 0;
void loop() {
  writeToBLE(j);
  j += 1;
  delay(500);
}

Has anyone an idea why I cannot pair my laptop with the AT-09?

Thank you
Alex

2

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