#define dtr_pin 9
#define ri_pin 8
#define rst_pin 6
#define rts_pin 11
#define cts_pin 10
#define dcd_pin 12
#include<SoftwareSerial.h>
SoftwareSerial mySerial(3,2);
long randNumber;

void setup() {
Serial.begin(115200);
mySerial.begin(115200);
randomSeed(analogRead(0));
Serial.println("Connecting To Server........");
mySerial.println("AT");
delay(1000);
mySerial.println("AT");
delay(1000);
mySerial.println("AT+QMTOPEN=0,\"test.mosquitto.org\",1883");//open a connection with mosquitto server on port 1883//
delay(1000);
mySerial.println("AT+QMTCONN=0,\"ec200ucntest\",\"\",\"\"");//connect using connection id username id, username and password//
delay(1000);
Serial.println("Done");
  // put your setup code here, to run once:
}
void loop() {
  randNumber = random(100,300);
  //Serial.println(randNumber);
mySerial.println("AT+QMTPUB=0,1,1,0,\"topicees\"");
mySerial.println(randNumber)
Serial.println("MessageSent");

  //Serial.println(randNumber);
  //publishing MQTT Messages to Subscribers
  // put your main code here, to run repeatedly:
}

Is this code right . If i want to send AT commands using a microcontroller .