Jimmy Moo

Important changes to forums and questions

All forums and questions are now archived. To start a new conversation or read the latest updates go to forums.mbed.com.

7 years ago.

Sending AT commands to bluetooth module using ATCmdParser

Hello,

I am using a NUCLEO L432KC to send AT commands to a bluetooth classic module to change the default baud rate. I want to use the ATCmdParser to send AT commands to the bluetooth module, but I get the following error: Error: Identifier "ATCmdParser" is undefined. Please help!

#include "mbed.h"
Serial pc(PA_2, PA_15);
Serial bt(PA_9, PA_10);
ATCmdParser at(&bt, "\r\n")
at.send("AT") && at.recv("OK");
at.send("AT+AB ChangeDefaultBaud [921600]", 3) && at.recv("OK");*/

int main()
{
    pc.baud(921600);
    bt.baud(921600);
    while(1) {
        wait(2);
        pc.printf("hello\n");
        bt.printf("hello\n");  
    }
}

mbed.h has include for ATCmdParser so that's not the problem. Issue is that you running the code outside of the main and ATCmdParser line is missing ';' Also loose the '*/' at the end of the second at.send(...)...

This seems to compile fine:

#include "mbed.h"
Serial pc(PA_2, PA_15);
Serial bt(PA_9, PA_10);
ATCmdParser at(&bt, "\r\n");

int main()
{
    at.send("AT") && at.recv("OK");
    at.send("AT+AB ChangeDefaultBaud [921600]", 3) && at.recv("OK");

    pc.baud(921600);
    bt.baud(921600);
    while(1) {
        wait(2);
        pc.printf("hello\n");
        bt.printf("hello\n");
    }
}

In second at.send command you don't need ', 3' as you are don't have %d where to put that.

posted by Teppo Järvelin 14 Dec 2018

1 Answer

Ralph Fulchiero
7 years ago.

Hi Jihong,

We have edited your post so that it is more legible. In the future please use <<code>> and <</code>> tags as described in the "Editing tips".

It appears that you are missing a #include of "platform\ATCmdParser.h". We have a AT command parser example here:

Regards,

Ralph, Team Mbed