Sample MQTT program - simple send and receive
Fork of HelloMQTT by
main.cpp@23:85b0a1df7d75, 2017-10-03 (annotated)
- Committer:
- icraggs
- Date:
- Tue Oct 03 22:56:42 2017 +0000
- Revision:
- 23:85b0a1df7d75
- Parent:
- 21:a68bd76740f9
Update client id and hostname
Who changed what in which revision?
User | Revision | Line number | New 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 | *******************************************************************************/ |
Jan Jongboom |
20:49c9daf2b0ff | 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. |
Jan Jongboom |
20:49c9daf2b0ff | 25 | |
icraggs | 2:638c854c0695 | 26 | */ |
Jan Jongboom |
20:49c9daf2b0ff | 27 | |
Jan Jongboom |
21:a68bd76740f9 | 28 | // change this to 1 to output messages to LCD instead of serial |
Jan Jongboom |
21:a68bd76740f9 | 29 | #define USE_LCD 0 |
icraggs | 1:a1d5c7a6acbc | 30 | |
icraggs | 18:07a79d8f01c3 | 31 | #if USE_LCD |
icraggs | 17:0811bdbdd78a | 32 | #include "C12832.h" |
icraggs | 2:638c854c0695 | 33 | |
Jan Jongboom |
20:49c9daf2b0ff | 34 | // the actual pins are defined in mbed_app.json and can be overridden per target |
Jan Jongboom |
20:49c9daf2b0ff | 35 | C12832 lcd(LCD_MOSI, LCD_SCK, LCD_MISO, LCD_A0, LCD_NCS); |
icraggs | 17:0811bdbdd78a | 36 | |
Jan Jongboom |
20:49c9daf2b0ff | 37 | #define logMessage lcd.cls();lcd.printf |
Jan Jongboom |
20:49c9daf2b0ff | 38 | |
Jan Jongboom |
20:49c9daf2b0ff | 39 | #else |
Jan Jongboom |
20:49c9daf2b0ff | 40 | |
Jan Jongboom |
20:49c9daf2b0ff | 41 | #define logMessage printf |
icraggs | 18:07a79d8f01c3 | 42 | |
icraggs | 18:07a79d8f01c3 | 43 | #endif |
icraggs | 18:07a79d8f01c3 | 44 | |
icraggs | 17:0811bdbdd78a | 45 | #define MQTTCLIENT_QOS2 1 |
icraggs | 23:85b0a1df7d75 | 46 | #define MQTT_DEBUG 1 |
icraggs | 0:0cae29831d01 | 47 | |
Jan Jongboom |
20:49c9daf2b0ff | 48 | #include "easy-connect.h" |
Jan Jongboom |
20:49c9daf2b0ff | 49 | #include "MQTTNetwork.h" |
Jan Jongboom |
20:49c9daf2b0ff | 50 | #include "MQTTmbed.h" |
icraggs | 2:638c854c0695 | 51 | #include "MQTTClient.h" |
icraggs | 2:638c854c0695 | 52 | |
icraggs | 2:638c854c0695 | 53 | int arrivedcount = 0; |
icraggs | 2:638c854c0695 | 54 | |
icraggs | 8:a3e3113054a1 | 55 | |
icraggs | 9:5beb8609e9f7 | 56 | void messageArrived(MQTT::MessageData& md) |
icraggs | 2:638c854c0695 | 57 | { |
icraggs | 9:5beb8609e9f7 | 58 | MQTT::Message &message = md.message; |
Jan Jongboom |
20:49c9daf2b0ff | 59 | logMessage("Message arrived: qos %d, retained %d, dup %d, packetid %d\r\n", message.qos, message.retained, message.dup, message.id); |
Jan Jongboom |
20:49c9daf2b0ff | 60 | logMessage("Payload %.*s\r\n", message.payloadlen, (char*)message.payload); |
icraggs | 2:638c854c0695 | 61 | ++arrivedcount; |
icraggs | 2:638c854c0695 | 62 | } |
icraggs | 0:0cae29831d01 | 63 | |
icraggs | 2:638c854c0695 | 64 | |
icraggs | 2:638c854c0695 | 65 | int main(int argc, char* argv[]) |
Jan Jongboom |
20:49c9daf2b0ff | 66 | { |
Jan Jongboom |
20:49c9daf2b0ff | 67 | float version = 0.6; |
icraggs | 2:638c854c0695 | 68 | char* topic = "mbed-sample"; |
Jan Jongboom |
20:49c9daf2b0ff | 69 | |
Jan Jongboom |
20:49c9daf2b0ff | 70 | logMessage("HelloMQTT: version is %.2f\r\n", version); |
Jan Jongboom |
20:49c9daf2b0ff | 71 | |
Jan Jongboom |
20:49c9daf2b0ff | 72 | NetworkInterface* network = easy_connect(true); |
Jan Jongboom |
20:49c9daf2b0ff | 73 | if (!network) { |
Jan Jongboom |
20:49c9daf2b0ff | 74 | return -1; |
Jan Jongboom |
20:49c9daf2b0ff | 75 | } |
Jan Jongboom |
20:49c9daf2b0ff | 76 | |
Jan Jongboom |
20:49c9daf2b0ff | 77 | MQTTNetwork mqttNetwork(network); |
Jan Jongboom |
20:49c9daf2b0ff | 78 | |
Jan Jongboom |
21:a68bd76740f9 | 79 | MQTT::Client<MQTTNetwork, Countdown> client(mqttNetwork); |
Jan Jongboom |
20:49c9daf2b0ff | 80 | |
icraggs | 23:85b0a1df7d75 | 81 | const char* hostname = "iot.eclipse.org"; |
icraggs | 4:e4c690c45021 | 82 | int port = 1883; |
Jan Jongboom |
20:49c9daf2b0ff | 83 | logMessage("Connecting to %s:%d\r\n", hostname, port); |
Jan Jongboom |
20:49c9daf2b0ff | 84 | int rc = mqttNetwork.connect(hostname, port); |
icraggs | 4:e4c690c45021 | 85 | if (rc != 0) |
Jan Jongboom |
20:49c9daf2b0ff | 86 | logMessage("rc from TCP connect is %d\r\n", rc); |
Jan Jongboom |
20:49c9daf2b0ff | 87 | |
Jan Jongboom |
20:49c9daf2b0ff | 88 | MQTTPacket_connectData data = MQTTPacket_connectData_initializer; |
icraggs | 23:85b0a1df7d75 | 89 | char clientid[30]; |
icraggs | 23:85b0a1df7d75 | 90 | sprintf(clientid, "mbed-sample-%d", rand()); |
icraggs | 23:85b0a1df7d75 | 91 | logMessage("Client id is %s\r\n", clientid); |
icraggs | 23:85b0a1df7d75 | 92 | data.clientID.cstring = clientid; |
icraggs | 10:086a9314e8a5 | 93 | data.username.cstring = "testuser"; |
icraggs | 10:086a9314e8a5 | 94 | data.password.cstring = "testpassword"; |
icraggs | 16:28d062c5522b | 95 | if ((rc = client.connect(data)) != 0) |
Jan Jongboom |
20:49c9daf2b0ff | 96 | logMessage("rc from MQTT connect is %d\r\n", rc); |
Jan Jongboom |
20:49c9daf2b0ff | 97 | |
icraggs | 19:7f7aba7a4a8b | 98 | if ((rc = client.subscribe(topic, MQTT::QOS2, messageArrived)) != 0) |
Jan Jongboom |
20:49c9daf2b0ff | 99 | logMessage("rc from MQTT subscribe is %d\r\n", rc); |
icraggs | 2:638c854c0695 | 100 | |
icraggs | 2:638c854c0695 | 101 | MQTT::Message message; |
icraggs | 0:0cae29831d01 | 102 | |
icraggs | 2:638c854c0695 | 103 | // QoS 0 |
icraggs | 2:638c854c0695 | 104 | char buf[100]; |
Jan Jongboom |
20:49c9daf2b0ff | 105 | sprintf(buf, "Hello World! QoS 0 message from app version %f\r\n", version); |
icraggs | 2:638c854c0695 | 106 | message.qos = MQTT::QOS0; |
icraggs | 2:638c854c0695 | 107 | message.retained = false; |
icraggs | 2:638c854c0695 | 108 | message.dup = false; |
icraggs | 2:638c854c0695 | 109 | message.payload = (void*)buf; |
icraggs | 2:638c854c0695 | 110 | message.payloadlen = strlen(buf)+1; |
icraggs | 16:28d062c5522b | 111 | rc = client.publish(topic, message); |
icraggs | 10:086a9314e8a5 | 112 | while (arrivedcount < 1) |
icraggs | 2:638c854c0695 | 113 | client.yield(100); |
Jan Jongboom |
20:49c9daf2b0ff | 114 | |
icraggs | 2:638c854c0695 | 115 | // QoS 1 |
Jan Jongboom |
20:49c9daf2b0ff | 116 | sprintf(buf, "Hello World! QoS 1 message from app version %f\r\n", version); |
icraggs | 2:638c854c0695 | 117 | message.qos = MQTT::QOS1; |
icraggs | 2:638c854c0695 | 118 | message.payloadlen = strlen(buf)+1; |
icraggs | 16:28d062c5522b | 119 | rc = client.publish(topic, message); |
icraggs | 10:086a9314e8a5 | 120 | while (arrivedcount < 2) |
icraggs | 2:638c854c0695 | 121 | client.yield(100); |
Jan Jongboom |
20:49c9daf2b0ff | 122 | |
icraggs | 2:638c854c0695 | 123 | // QoS 2 |
Jan Jongboom |
20:49c9daf2b0ff | 124 | sprintf(buf, "Hello World! QoS 2 message from app version %f\r\n", version); |
icraggs | 2:638c854c0695 | 125 | message.qos = MQTT::QOS2; |
icraggs | 2:638c854c0695 | 126 | message.payloadlen = strlen(buf)+1; |
icraggs | 16:28d062c5522b | 127 | rc = client.publish(topic, message); |
icraggs | 10:086a9314e8a5 | 128 | while (arrivedcount < 3) |
icraggs | 2:638c854c0695 | 129 | client.yield(100); |
Jan Jongboom |
20:49c9daf2b0ff | 130 | |
icraggs | 17:0811bdbdd78a | 131 | if ((rc = client.unsubscribe(topic)) != 0) |
Jan Jongboom |
20:49c9daf2b0ff | 132 | logMessage("rc from unsubscribe was %d\r\n", rc); |
Jan Jongboom |
20:49c9daf2b0ff | 133 | |
icraggs | 8:a3e3113054a1 | 134 | if ((rc = client.disconnect()) != 0) |
Jan Jongboom |
20:49c9daf2b0ff | 135 | logMessage("rc from disconnect was %d\r\n", rc); |
Jan Jongboom |
20:49c9daf2b0ff | 136 | |
Jan Jongboom |
20:49c9daf2b0ff | 137 | mqttNetwork.disconnect(); |
Jan Jongboom |
20:49c9daf2b0ff | 138 | |
Jan Jongboom |
20:49c9daf2b0ff | 139 | logMessage("Version %.2f: finish %d msgs\r\n", version, arrivedcount); |
Jan Jongboom |
20:49c9daf2b0ff | 140 | |
icraggs | 0:0cae29831d01 | 141 | return 0; |
icraggs | 0:0cae29831d01 | 142 | } |