mvr reddy
Reputation: 21
mqtt integration with java
I want to integrate Mqtt program with java Code.The following is my java code to which i need to send message to the device through MQTT broker connection....So,that i need to send message eg: 3G SETT;56:1024; to the device while connecting through mqtt broker.so i need to call the mqtt connection method into the program...
Tell me where exactly write and edit the code and where to integrate the mqtt broker code
import java.util.Scanner;
public class message implements MqttCallback
{
static int option;
static Scanner sc = new Scanner(System.in);
static boolean go = true; // for starting main outer loop
static boolean run = true;
static String ip;
static String entire_address,topic;
static int port;
static String apn;
static String msg;
static void operator_apn() {
System.out.println("Enter operator APN");
apn = sc.next();
msg = "3gc SETT;" + 0 + 1 + ":" + apn + ";";
System.out.println("Your message Format is:" + msg);
System.out.println("Enter Topic Name");
topic=sc.next();
System.out.println("Enter Modem Ip address");
ip=sc.next();
System.out.println("Enter Modem Port Number");
port=sc.nextInt();
entire_address=ip+":"+port;
System.out.print("Entire Address is:"+entire_address);
}
static void apn_user_id() {
String username, msg;
System.out.println("Enter APN UserName");
username = sc.next();
msg = "3gc SETT;" + 0 + 2 + ":" + username + ";";
System.out.println("Your APN UserName Format is:" + msg);
}
static void apn_user_password() {
String password, msg;
System.out.println("Enter APN Password");
password = sc.next();
msg = "3gc SETT;" + 0 + 3 + ":" + password + ";";
System.out.println("Your APN Password Format is:" + msg);
}
static void primary_server_ip() {
String ip, msg;
System.out.println("Enter Server primary ip");
ip = sc.next();
msg = "3gc SETT;" + 4 + ":" + ip + ";";
System.out.println("Your Primary Server ip Format is:" + msg);
}
static void primary_server_port() {
String msg;
int port;
System.out.println("Enter Primary server port");
port = sc.nextInt();
msg = "3g SETT;" + 5 + ":" + port + ";";
System.out.println("Your Primary Server port Format is:" + msg);
}
static void secondary_server_ip() {
String ip, msg;
System.out.println("Enter Server secondary ip");
ip = sc.next();
msg = "3gc SETT;" + 6 + ":" + ip + ";";
System.out.println("Your Secondary Server ip Format is:" + msg);
}
static void secondary_server_port() {
String msg;
int port;
System.out.println("Enter Secondary server port");
port = sc.nextInt();
msg = "3g SETT;" + 7 + ":" + port + ";";
System.out.println("Your Secondary Server port Format is:" + msg);
}
static void fota_apn() {
String apn, msg;
System.out.println("Enter FOTA APN");
apn = sc.next();
msg = "3gc SETT;" + 8 + ":" + apn + ";";
System.out.println("Your FOTA APN Format is:" + msg);
}
static void fota_server_ip() {
String ip, msg;
System.out.println("Enter FOTA Server ip");
ip = sc.next();
msg = "3gc SETT;" + 9 + ":" + ip + ";";
System.out.println("Your FOTA Server ip Format is:" + msg);
}
static void fota_server_port() {
String msg;
int port;
System.out.println("Enter FOTA server port");
port = sc.nextInt();
msg = "3g SETT;" + 10 + ":" + port + ";";
System.out.println("Your FOTA Server port Format is:" + msg);
}
static void connection_retry_time() {
String msg;
int time;
System.out.println("Enter Connection Retry Time");
time = sc.nextInt();
msg = "3g SETT;" + 11 + ":" + time + ";";
System.out.println("Your Connection Retry Time Format is:" + msg);
}
static void keep_alive_time() {
String msg;
int time;
System.out.println("Enter Keep Alive Time");
time = sc.nextInt();
msg = "3g SETT;" + 12 + ":" + time + ";";
System.out.println("Your Keep Alive Time Format is:" + msg);
}
static void mp_size() {
String msg;
int size;
System.out.println("Enter MP Size");
size = sc.nextInt();
msg = "3g SETT;" + 13 + ":" + size + ";";
System.out.println("Your MP Size Format is:" + msg);
}
static void mh_size() {
String msg;
int size;
System.out.println("Enter MH Size");
size = sc.nextInt();
msg = "3g SETT;" + 14 + ":" + size + ";";
System.out.println("Your MH Size Format is:" + msg);
}
static void message_queing_username() {
String username, msg;
System.out.println("Enter Message Queing UserName");
username = sc.next();
msg = "3gc SETT;" + 22 + ":" + username + ";";
System.out.println("Your Message Queing UserName Format is:" + msg);
}
static void message_queing_password() {
String password, msg;
System.out.println("Enter Message Queing password");
password = sc.next();
msg = "3gc SETT;" + 23 + ":" + password + ";";
System.out.println("Your Message Queing password Format is:" + msg);
}
static void data_center_smsc_number() {
long number;
String msg;
System.out.println("Enter Data Center SMSC Mobile Number");
number = sc.nextLong();
msg = "3gc SETT;" + 24 + ":" + number + ";";
System.out.println("Your Data Center SMSC Mobile Number Format is:"
+ msg);
}
static void application_instant_time() {
String msg;
int time;
System.out.println("Enter Application Instant Time");
time = sc.nextInt();
msg = "3g SETT;" + 51 + ":" + time + ";";
System.out.println("Your Application Instant Time Setting Format is:"
+ msg);
}
static void app_billing_time() {
String msg;
int time;
System.out.println("Enter Application Billing Time");
time = sc.nextInt();
msg = "3g SETT;" + 52 + ":" + time + ";";
System.out.println("Your Application Billing Time Setting Format is:"
+ msg);
}
static void app_load_time() {
String msg;
int time;
System.out.println("Enter Application Load Time");
time = sc.nextInt();
msg = "3g SETT;" + 53 + ":" + time + ";";
System.out.println("Your Application Load Time Setting Format is:"
+ msg);
}
static void app_event_time() {
String msg;
int time;
System.out.println("Enter Application Event Time");
time = sc.nextInt();
msg = "3g SETT;" + 54 + ":" + time + ";";
System.out.println("Your Application Event Time Setting Format is:"
+ msg);
}
static void identify_time() {
String msg;
int time;
System.out.println("Enter Identify Time");
time = sc.nextInt();
msg = "3g SETT;" + 55 + ":" + time + ";";
System.out.println("Your Identifyt Time Setting Format is:" + msg);
}
static void app_identify_log() {
String msg;
int log;
System.out.println("Enter Application Identify Log");
log = sc.nextInt();
msg = "3g SETT;" + 56 + ":" + log + ";";
System.out.println("Your Application Identify Log Format is:" + msg);
}
static void app_instant_log() {
String msg;
int log;
System.out.println("Enter Application Instant log");
log = sc.nextInt();
msg = "3g SETT;" + 57 + ":" + log + ";";
System.out.println("Your Application Instant log Setting Format is:"
+ msg);
}
static void app_bill_log() {
String msg;
int log;
System.out.println("Enter Application Bill Log");
log = sc.nextInt();
msg = "3g SETT;" + 58 + ":" + log + ";";
System.out.println("Your Application Instant Bill Log Format is:" + msg);
}
static void app_load_log() {
String msg;
int log;
System.out.println("Enter Application Load Log");
log = sc.nextInt();
msg = "3g SETT;" + 59 + ":" + log + ";";
System.out.println("Your Application Load Log Format is:" + msg);
}
static void app_event_log() {
String msg;
int log;
System.out.println("Enter Application Event Log");
log = sc.nextInt();
msg = "3g SETT;" + 60 + ":" + log + ";";
System.out.println("Your Application Event Log Format is:" + msg);
}
static void load_survey_days() {
String msg;
int days;
System.out.println("Enter Load Survey Days");
days = sc.nextInt();
msg = "3g SETT;" + 61 + ":" + days + ";";
System.out.println("Your Load Survey Days Format is:" + msg);
}
static void schedule_interval() {
String msg;
int interval;
System.out.println("Enter Schedule Interval");
interval = sc.nextInt();
msg = "3g SETT;" + 62 + ":" + interval + ";";
System.out.println("Your Schedule Interval Format is:" + msg);
}
static void dlms_password() {
String password, msg;
System.out.println("Enter DLMS Password");
password = sc.next();
msg = "3g SETT;" + 63 + ":" + password + ";";
System.out.println("Your DLMS Password Format is:" + msg);
}
static void dia_time() {
int time;
String msg;
System.out.println("Enter DIA Time");
time = sc.nextInt();
msg = "3g SETT;" + 64 + ":" + time + ";";
System.out.println("Your DIA Time Format is:" + msg);
}
static void dia_sample() {
int sample;
String msg;
System.out.println("Enter DIA Sample");
sample = sc.nextInt();
msg = "3g SETT;" + 65 + ":" + sample + ";";
System.out.println("Your DIA Time Sample is:" + msg);
}
static void schedule_enable() {
int schedule;
String msg;
System.out.println("Enter Schedule Enable");
schedule = sc.nextInt();
msg = "3g SETT;" + 66 + ":" + schedule + ";";
System.out.println("Your Schedule Enable Format is:" + msg);
}
static void schedule_hour() {
int time;
String msg;
System.out.println("Enter Schedule Hour");
time = sc.nextInt();
msg = "3g SETT;" + 67 + ":" + time + ";";
System.out.println("Your Schedule Hour Format is:" + msg);
}
static void schedule_mins() {
int time;
String msg;
System.out.println("Enter Schedule Mins");
time = sc.nextInt();
msg = "3g SETT;" + 68 + ":" + time + ";";
System.out.println("Your Schedule Mins Format is:" + msg);
}
static void event_order_request() {
int order_request;
String msg;
System.out.println("Enter Event Order Request");
order_request = sc.nextInt();
msg = "3g SETT;" + 69 + ":" + order_request + ";";
System.out.println("Your Event Order request Format is:" + msg);
}
static void event_fifo() {
int fifo;
String msg;
System.out.println("Enter Event FIFO");
fifo = sc.nextInt();
msg = "3g SETT;" + 70 + ":" + fifo + ";";
System.out.println("Your Event FIFO Format is:" + msg);
}
static void app_send_load_select() {
int load;
String msg;
System.out.println("Enter App Send Load Select");
load = sc.nextInt();
msg = "3g SETT;" + 71 + ":" + load + ";";
System.out.println("Your App Send Load Select Format is:" + msg);
}
public static void main(String[] args) throws MqttException {
while (go == true) {
while (run == true) {
System.out.println("\n 1.Enter operator APN \n 2.Enter APN userId \n 3.Enter APN password \n 4.Enter primary server ip \n 5.Enter primary server port \n"
+ " 6.Enter Secondary Server IP \n 7.Enter Secondary Server Port \n 8.Enter FOTA APN \n 9.Enter FOTA Server IP \n 10.Enter FOTA server Port \n"
+ " 11.Enter Connection Retry Time \n 12.Enter Keep Alive Time \n 13.Enter MP Size \n 14.Enter MH Size \n"
+ " 15.Enter Message Queing UserName \n 16.Enter Message Queing Password \n 17.Enter Data Center SMSC Number \n 18.Enter App Instant Time \n"
+ " 19.Enter App Billing Time \n 20.Enter App Load Time \n 21.Enter App Event Time \n 22.Enter Identify Time \n 23.Enter App Identify Log \n"
+ " 24.Enter App Instant Time \n 25.Enter App Bill Log \n 26.Enter App Load Log \n 27.Enter App Event Log \n 28.Enter Load Survey Days \n"
+ " 29.Enter Schedule Interval \n 30.Enter DLMS Password \n 31.Enter DIA Time \n 32.Enter DIA Sample \n 33.Enter Schedule Enable \n"
+ " 34.Enter Schedule Hour \n 35.Enter Schedule Mins \n 36.Enter Event Order Request \n 37.Enter Event FIFO \n 38.Enter App Send Load Select \n"
+ " 39.Change Meter \n 40.Restart Meter ");
System.out.println("Enter your option:");
option = sc.nextInt();
switch (option) {
case 1:
operator_apn();
sendMessage();
break;
case 2:
apn_user_id();
message.sendMessage();
break;
case 3:
apn_user_password();
message.sendMessage();
break;
case 4:
primary_server_ip();
message.sendMessage();
break;
case 5:
primary_server_port();
message.sendMessage();
break;
case 6:
secondary_server_ip();
message.sendMessage();
break;
case 7:
secondary_server_port();
message.sendMessage();
break;
case 8:
fota_apn();
message.sendMessage();
break;
case 9:
fota_server_ip();
message.sendMessage();
break;
case 10:
fota_server_port();
message.sendMessage();
break;
case 11:
connection_retry_time();
message.sendMessage();
break;
case 12:
keep_alive_time();
message.sendMessage();
break;
case 13:
mp_size();
message.sendMessage();
break;
case 14:
mh_size();
message.sendMessage();
break;
case 15:
message_queing_username();
message.sendMessage();
break;
case 16:
message_queing_password();
message.sendMessage();
break;
case 17:
data_center_smsc_number();
message.sendMessage();
break;
case 18:
application_instant_time();
message.sendMessage();
break;
case 19:
app_billing_time();
message.sendMessage();
break;
case 20:
app_load_time();
message.sendMessage();
break;
case 21:
app_event_time();
message.sendMessage();
break;
case 22:
identify_time();
message.sendMessage();
break;
case 23:
app_identify_log();
message.sendMessage();
break;
case 24:
app_instant_log();
message.sendMessage();
break;
case 25:
app_bill_log();
message.sendMessage();
break;
case 26:
app_load_log();
message.sendMessage();
break;
case 27:
app_event_log();
message.sendMessage();
break;
case 28:
load_survey_days();
message.sendMessage();
break;
case 29:
schedule_interval();
message.sendMessage();
break;
case 30:
dlms_password();
message.sendMessage();
break;
case 31:
dia_time();message.sendMessage();
break;
case 32:
dia_sample();
message.sendMessage();
break;
case 33:
schedule_enable();
message.sendMessage();
break;
case 34:
schedule_hour();
message.sendMessage();
break;
case 35:
schedule_mins();
message.sendMessage();
break;
case 36:
event_order_request();
message.sendMessage();
break;
case 37:
event_fifo();
message.sendMessage();
break;
case 38:
app_send_load_select();
message.sendMessage();
break;
case 39:
System.out.println("Change Meter");
break;
case 40:
System.out.println("Restart");
break;
default:
System.err.println("Invalid Option");
}
run = false;
}
if (run == false) {
System.out.println("\nWould you like to run again? Y/N");
char again = sc.next().charAt(0);
again = Character.toUpperCase(again);
if (again == 'Y') {
run = true;
} else if (again == 'N') {
System.out.println("Exit.");
go = false;
} else {
System.err.println("Invalid entry. Try again.");
}
}
Upvotes: 2
Views: 1397
Answers (2)
PRAVEEN PS
Reputation: 82
The MQTT messages can be send with the help of a broker. Here the broker can be anything which have the implementation of MQTT protocol. As of now, the versions is 3.1.1
To send the messages over MQTT, you need to have a Paho library, It is available in different flavours. The once I used was eclipse Paho Library.
Given below are two links through which you can implement.
- Eclipse Paho implementation example: https://www.hivemq.com/blog/mqtt-client-library-encyclopedia-eclipse-paho-java
- Online MQTT broker for testing (HiveMQ): https://www.hivemq.com/try-out/
- Online MQTT broker Dashboard (HiveMQ): http://www.mqtt-dashboard.com/
Upvotes: -1
Teixi
Reputation: 1097
Using the Java Paho MQTT Library you should look at the examples to understand how to implement a client that publishes to an MQTT Broker.
Normally first you should implement the method .connect to a Broker, and after that you use the method .publish to send a message containing a payload to an specific topic into the MQTT Broker.
You should look at the sample Paho app.
And also to the implemented Paho client tests.
Upvotes: 2