int main() {
    USBHostSerial serial;
    //serial.baud(9600);
    t.reset();
    t.start();
    pc.baud(460800);
    wait(2);
    pc.printf("Hello, program starts\r\n");
    
    while(1) {
    
        // try to connect a serial device
        while(!serial.connect()) wait(0.5);
     //       Thread::wait(500);
        
        // in a loop, print all characters received
        // if the device is disconnected, we try to connect it again
        while (1) {
           pc.printf("Try connect\r\n");
        
            // if device disconnected, try to connect it again
            if (!serial.connected())
            {  
                //Not connected
                pc.printf("NC\r\n");
                break;
                }
                else
                {
                pc.printf("# %d :",t.read_us());
                t.reset();
                
                //This sends the command to the sensor: Request hardware version (returns 32 byte string)
                serial.printf(":230\n");
                }
            char cx;
            
            pc.printf("#2 %d :",t.read_us());
            
            // print characters received
            while (serial.available()) {
                cx = serial.getc();
                printf("%c", cx);
            }            
            
            i
            pc.printf("#3 %d :",t.read_us());
            
            pc.printf("\r\n");
            
        }
    }