File content as of revision 0:aaec057956ca:

#include "mbed.h"
#include<stdio.h>
#include<string.h>

/* !!!Change pins according to your connection!!! */
DigitalOut RST_KEY(D4,0);
DigitalOut LOW_PWR_KEY(D5,1);
DigitalOut PWR_KEY(D6,1);

/*DigitalOut LED_R(D7,1);
DigitalOut LED_G(D8,1);
DigitalOut LED_B(D9,1);*/


/* !!!Change pins according to your connection!!! */
BufferedSerial uart(D8,D2, 115200); // UART TX, RX
ATCmdParser module(&uart,"\r\n");

// init the module
bool ModulePowerOn() {
    int i=0;
    bool result = false;
    RST_KEY = 0;
    thread_sleep_for(3000);
    RST_KEY = 1;
    thread_sleep_for(15000);

    result =  module.recv("OK");
    if(!result){
        for(i=0;i<10;i++){
            module.send("AT");
            thread_sleep_for(500);
            result =  module.recv("OK");
            if(result){
                break;
            }
        }
    }
    return result;
}

// setup
int main() {
   
    printf("Mbed A9G test\n");
    module.debug_on(true);
    if(ModulePowerOn()){
        printf("Module is up!\n");  
    } else {
        printf("No communication with module!\n");  
    }

    // loop
    while(true)
    {
        //do something in loop
        thread_sleep_for(1000);
    }
}