10 years ago.

PAIRING TWO RN42

Hi guys,

I have just bought two RN42 chips and I am trying to pair them together using two LPC1768. Here is a list of what I've done; For Master LPC1768 + RN42 Tx pin on RN42 => pin 9 Rx pin on RN42 => pin 10 Common ground For Slave LPC1768 Tx pin on RN42 => pin 9 Rx pin on RN42 => pin 10 Common ground

I have written installed the code below from Rob and Tim's book. so far the only thing i've managed to get out of the chips is the master getting into command mode but it never connected.tried changing the pins around no joy. i've scan for both chips with an Android phone they are being found every time, guess that eliminates the antennas or any such fault. Could you please point out where I am going wrong , thank you in advances.

/* Program Example 12.4: Paired Bluetooth master program
*/
#include "mbed.h"

Serial rn41(p9,p10);
BusOut led(LED4,LED3,LED2,LED1);
DigitalIn Din(p26); // digital switch input on pin 14

char x;
void initialize_connection(void);

void initialize_connection() 
    {
        rn41.putc('$'); // Enter command mode
        rn41.putc('$'); //
        rn41.putc('$'); //
        wait(0.5);
        rn41.putc('C'); //
        rn41.putc(','); // Send MAC address
        rn41.putc('0'); //
        rn41.putc('C'); //
        rn41.putc('D'); //
        rn41.putc('F'); //
        rn41.putc('A'); //
        rn41.putc('4'); //
        rn41.putc('6'); //
        rn41.putc('9'); //
        rn41.putc('D'); //
        rn41.putc('2'); //
        rn41.putc('C'); //
        rn41.putc('0'); //
        wait(0.5);
        rn41.putc('-'); // Exit command mode
        rn41.putc('-'); //
        rn41.putc('-'); //
        rn41.putc(0x0D); //
        wait(0.5);
    }
    
int main() 
{
    rn41.baud(115200);
    initialize_connection();
//    wait(30);
while (1) 
    {
        if (Din==1) { // if digital input switched high
        x=0x0F; // override with 0x0F
    } else 
    {
        x++; // else increment and
        if (x>0x0F) 
            { // output count value
                x=0;
            }
    }
    rn41.putc(x); // send char data on serial
    led = x; // set LEDs to count in binary
    wait(0.5);
}
    //Program Example 12.3: function to initialize paired Bluetooth connection with RN-41
   // modules
    
    
}

/* Program Example 12.2: Bluetooth serial sniffer program
*/
#include "mbed.h"

Serial rn41(p9,p10);
BusOut led(LED4,LED3,LED2,LED1);

int main() 
{
    rn41.baud(115200); // setup baud rate
    rn41.printf("Serial sniffer: outputs received data to LEDs\n\r");
    while (1) 
    {
        if (rn41.readable()) 
        { // if data available
            char x=rn41.getc(); // get data
            led=x; // output LSByte to LEDs
        }
    }
}