Sending At Commands to SPBT3.0DP2 via mbed

[JMin.17]

I am trying to use mbed to send AT Commands to the SPBT3.0DP2 module in order to change it's baud rate. I am using the ATCmdParser to send the AT commands. It seems like I am not able to enter the command mode? I'm not sure. please help.

I do at.send("^#^$^%") to try to enter command mode before changing the baud rate.

#include mbed.h

Serial pc(PA_2, PA_15);

Serial bt(PA_9, PA_10);

ATCmdParser at(&bt, "\r\n");

int main()

{

  pc.baud(921600);

  bt.baud(115200);

  pc.printf("hello starting off\n");

  bt.printf("hello starting off\n");

  at.send("^#^$^%");

  at.send("AT+AB ChangeBaud [921600]");

  at.send("AT+AB Bypass");

  bt.baud(921600);

  while(1) {

    wait(2);

    pc.printf("921600 baud rate\n");

    bt.printf("921600 baud rate\n");

  }

}