Ian Craggs / Mbed OS HelloMQTT

Sample MQTT program - simple send and receive

Dependencies:   C12832 MQTT

Fork of HelloMQTT by MQTT

main.cpp@17:0811bdbdd78a, 2015-07-27 (annotated)

Committer:
icraggs
Date:
Mon Jul 27 09:16:08 2015 +0000
Revision:
17:0811bdbdd78a
Parent:
16:28d062c5522b
Child:
18:07a79d8f01c3
Make sure QoS 2 works

Who changed what in which revision?

UserRevisionLine numberNew contents of line
icraggs 1:a1d5c7a6acbc 1 /*******************************************************************************
icraggs 17:0811bdbdd78a 2 * Copyright (c) 2014, 2015 IBM Corp.
icraggs 1:a1d5c7a6acbc 3 *
icraggs 1:a1d5c7a6acbc 4 * All rights reserved. This program and the accompanying materials
icraggs 1:a1d5c7a6acbc 5 * are made available under the terms of the Eclipse Public License v1.0
icraggs 1:a1d5c7a6acbc 6 * and Eclipse Distribution License v1.0 which accompany this distribution.
icraggs 1:a1d5c7a6acbc 7 *
icraggs 1:a1d5c7a6acbc 8 * The Eclipse Public License is available at
icraggs 1:a1d5c7a6acbc 9 * http://www.eclipse.org/legal/epl-v10.html
icraggs 1:a1d5c7a6acbc 10 * and the Eclipse Distribution License is available at
icraggs 1:a1d5c7a6acbc 11 * http://www.eclipse.org/org/documents/edl-v10.php.
icraggs 1:a1d5c7a6acbc 12 *
icraggs 1:a1d5c7a6acbc 13 * Contributors:
icraggs 1:a1d5c7a6acbc 14 * Ian Craggs - initial API and implementation and/or initial documentation
icraggs 17:0811bdbdd78a 15 * Ian Craggs - make sure QoS2 processing works, and add device headers
icraggs 1:a1d5c7a6acbc 16 *******************************************************************************/
icraggs 2:638c854c0695 17
icraggs 2:638c854c0695 18 /**
icraggs 2:638c854c0695 19 This is a sample program to illustrate the use of the MQTT Client library
icraggs 2:638c854c0695 20 on the mbed platform. The Client class requires two classes which mediate
icraggs 2:638c854c0695 21 access to system interfaces for networking and timing. As long as these two
icraggs 2:638c854c0695 22 classes provide the required public programming interfaces, it does not matter
icraggs 2:638c854c0695 23 what facilities they use underneath. In this program, they use the mbed
icraggs 2:638c854c0695 24 system libraries.
icraggs 2:638c854c0695 25
icraggs 2:638c854c0695 26 */
icraggs 1:a1d5c7a6acbc 27
icraggs 17:0811bdbdd78a 28 #include "C12832.h"
icraggs 2:638c854c0695 29
icraggs 17:0811bdbdd78a 30 #if defined(TARGET_UBLOX_C027)
icraggs 17:0811bdbdd78a 31 #warning "Compiling for mbed C027"
icraggs 17:0811bdbdd78a 32 #include "C027.h"
icraggs 17:0811bdbdd78a 33 #elif defined(TARGET_LPC1768)
icraggs 17:0811bdbdd78a 34 #warning "Compiling for mbed LPC1768"
icraggs 17:0811bdbdd78a 35 #include "LPC1768.h"
icraggs 17:0811bdbdd78a 36 #elif defined(TARGET_K64F)
icraggs 17:0811bdbdd78a 37 #warning "Compiling for mbed K64F"
icraggs 17:0811bdbdd78a 38 #include "K64F.h"
icraggs 17:0811bdbdd78a 39 #endif
icraggs 17:0811bdbdd78a 40
icraggs 17:0811bdbdd78a 41 #define MQTTCLIENT_QOS2 1
icraggs 0:0cae29831d01 42
icraggs 8:a3e3113054a1 43 #include "MQTTEthernet.h"
icraggs 2:638c854c0695 44 #include "MQTTClient.h"
icraggs 2:638c854c0695 45
icraggs 2:638c854c0695 46 int arrivedcount = 0;
icraggs 2:638c854c0695 47
icraggs 8:a3e3113054a1 48
icraggs 9:5beb8609e9f7 49 void messageArrived(MQTT::MessageData& md)
icraggs 2:638c854c0695 50 {
icraggs 9:5beb8609e9f7 51 MQTT::Message &message = md.message;
icraggs 9:5beb8609e9f7 52 printf("Message arrived: qos %d, retained %d, dup %d, packetid %d\n", message.qos, message.retained, message.dup, message.id);
icraggs 9:5beb8609e9f7 53 printf("Payload %.*s\n", message.payloadlen, (char*)message.payload);
icraggs 2:638c854c0695 54 ++arrivedcount;
icraggs 17:0811bdbdd78a 55 lcd.cls();
icraggs 9:5beb8609e9f7 56 lcd.puts((char*)message.payload);
icraggs 2:638c854c0695 57 }
icraggs 0:0cae29831d01 58
icraggs 2:638c854c0695 59
icraggs 2:638c854c0695 60 int main(int argc, char* argv[])
icraggs 2:638c854c0695 61 {
icraggs 8:a3e3113054a1 62 MQTTEthernet ipstack = MQTTEthernet();
icraggs 17:0811bdbdd78a 63 float version = 0.5;
icraggs 2:638c854c0695 64 char* topic = "mbed-sample";
icraggs 2:638c854c0695 65
icraggs 17:0811bdbdd78a 66 lcd.cls();
icraggs 17:0811bdbdd78a 67 lcd.printf("HelloMQTT: version is %f\n", version);
icraggs 2:638c854c0695 68
icraggs 8:a3e3113054a1 69 MQTT::Client<MQTTEthernet, Countdown> client = MQTT::Client<MQTTEthernet, Countdown>(ipstack);
icraggs 3:7a6a899de7cc 70
icraggs 4:e4c690c45021 71 char* hostname = "m2m.eclipse.org";
icraggs 4:e4c690c45021 72 int port = 1883;
icraggs 17:0811bdbdd78a 73 lcd.cls();
icraggs 4:e4c690c45021 74 lcd.printf("Connecting to %s:%d\n", hostname, port);
icraggs 4:e4c690c45021 75 int rc = ipstack.connect(hostname, port);
icraggs 4:e4c690c45021 76 if (rc != 0)
icraggs 17:0811bdbdd78a 77 {
icraggs 17:0811bdbdd78a 78 lcd.cls();
icraggs 4:e4c690c45021 79 lcd.printf("rc from TCP connect is %d\n", rc);
icraggs 17:0811bdbdd78a 80 }
icraggs 4:e4c690c45021 81
icraggs 4:e4c690c45021 82 MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
icraggs 4:e4c690c45021 83 data.MQTTVersion = 3;
icraggs 8:a3e3113054a1 84 data.clientID.cstring = "mbed-sample";
icraggs 10:086a9314e8a5 85 data.username.cstring = "testuser";
icraggs 10:086a9314e8a5 86 data.password.cstring = "testpassword";
icraggs 16:28d062c5522b 87 if ((rc = client.connect(data)) != 0)
icraggs 17:0811bdbdd78a 88 {
icraggs 17:0811bdbdd78a 89 lcd.cls();
icraggs 4:e4c690c45021 90 lcd.printf("rc from MQTT connect is %d\n", rc);
icraggs 17:0811bdbdd78a 91 }
icraggs 2:638c854c0695 92
icraggs 8:a3e3113054a1 93 if ((rc = client.subscribe(topic, MQTT::QOS1, messageArrived)) != 0)
icraggs 17:0811bdbdd78a 94 {
icraggs 17:0811bdbdd78a 95 lcd.cls();
icraggs 8:a3e3113054a1 96 lcd.printf("rc from MQTT subscribe is %d\n", rc);
icraggs 17:0811bdbdd78a 97 }
icraggs 2:638c854c0695 98
icraggs 2:638c854c0695 99 MQTT::Message message;
icraggs 0:0cae29831d01 100
icraggs 2:638c854c0695 101 // QoS 0
icraggs 2:638c854c0695 102 char buf[100];
icraggs 2:638c854c0695 103 sprintf(buf, "Hello World! QoS 0 message from app version %f\n", version);
icraggs 2:638c854c0695 104 message.qos = MQTT::QOS0;
icraggs 2:638c854c0695 105 message.retained = false;
icraggs 2:638c854c0695 106 message.dup = false;
icraggs 2:638c854c0695 107 message.payload = (void*)buf;
icraggs 2:638c854c0695 108 message.payloadlen = strlen(buf)+1;
icraggs 16:28d062c5522b 109 rc = client.publish(topic, message);
icraggs 10:086a9314e8a5 110 while (arrivedcount < 1)
icraggs 2:638c854c0695 111 client.yield(100);
icraggs 2:638c854c0695 112
icraggs 2:638c854c0695 113 // QoS 1
icraggs 2:638c854c0695 114 sprintf(buf, "Hello World! QoS 1 message from app version %f\n", version);
icraggs 2:638c854c0695 115 message.qos = MQTT::QOS1;
icraggs 2:638c854c0695 116 message.payloadlen = strlen(buf)+1;
icraggs 16:28d062c5522b 117 rc = client.publish(topic, message);
icraggs 10:086a9314e8a5 118 while (arrivedcount < 2)
icraggs 2:638c854c0695 119 client.yield(100);
icraggs 2:638c854c0695 120
icraggs 2:638c854c0695 121 // QoS 2
icraggs 2:638c854c0695 122 sprintf(buf, "Hello World! QoS 2 message from app version %f\n", version);
icraggs 2:638c854c0695 123 message.qos = MQTT::QOS2;
icraggs 2:638c854c0695 124 message.payloadlen = strlen(buf)+1;
icraggs 16:28d062c5522b 125 rc = client.publish(topic, message);
icraggs 10:086a9314e8a5 126 while (arrivedcount < 3)
icraggs 2:638c854c0695 127 client.yield(100);
icraggs 17:0811bdbdd78a 128
icraggs 17:0811bdbdd78a 129 if ((rc = client.unsubscribe(topic)) != 0)
icraggs 10:086a9314e8a5 130 {
icraggs 17:0811bdbdd78a 131 lcd.cls();
icraggs 17:0811bdbdd78a 132 lcd.printf("rc from unsubscribe was %d\n", rc);
icraggs 10:086a9314e8a5 133 }
icraggs 2:638c854c0695 134
icraggs 8:a3e3113054a1 135 if ((rc = client.disconnect()) != 0)
icraggs 17:0811bdbdd78a 136 {
icraggs 17:0811bdbdd78a 137 lcd.cls();
icraggs 17:0811bdbdd78a 138 lcd.printf("rc from disconnect was %d\n", rc);
icraggs 17:0811bdbdd78a 139 }
icraggs 2:638c854c0695 140
icraggs 2:638c854c0695 141 ipstack.disconnect();
icraggs 2:638c854c0695 142
sam_grove 6:4a257f6ac09a 143 lcd.cls();
icraggs 8:a3e3113054a1 144 lcd.printf("Version %.2f: finish %d msgs\n", version, arrivedcount);
icraggs 2:638c854c0695 145
icraggs 0:0cae29831d01 146 return 0;
icraggs 0:0cae29831d01 147 }