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main.cpp@6:e4c690c45021, 2014-05-11 (annotated)
- Committer:
- icraggs
- Date:
- Sun May 11 18:52:57 2014 +0000
- Revision:
- 6:e4c690c45021
- Parent:
- 3:7a6a899de7cc
- Child:
- 7:3de634f2d40c
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Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
icraggs | 1:a1d5c7a6acbc | 1 | /******************************************************************************* |
icraggs | 1:a1d5c7a6acbc | 2 | * Copyright (c) 2014 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 | 1:a1d5c7a6acbc | 15 | *******************************************************************************/ |
icraggs | 2:638c854c0695 | 16 | |
icraggs | 2:638c854c0695 | 17 | /** |
icraggs | 2:638c854c0695 | 18 | This is a sample program to illustrate the use of the MQTT Client library |
icraggs | 2:638c854c0695 | 19 | on the mbed platform. The Client class requires two classes which mediate |
icraggs | 2:638c854c0695 | 20 | access to system interfaces for networking and timing. As long as these two |
icraggs | 2:638c854c0695 | 21 | classes provide the required public programming interfaces, it does not matter |
icraggs | 2:638c854c0695 | 22 | what facilities they use underneath. In this program, they use the mbed |
icraggs | 2:638c854c0695 | 23 | system libraries. |
icraggs | 2:638c854c0695 | 24 | |
icraggs | 2:638c854c0695 | 25 | */ |
icraggs | 1:a1d5c7a6acbc | 26 | |
icraggs | 0:0cae29831d01 | 27 | #include "mbed.h" |
icraggs | 0:0cae29831d01 | 28 | #include "EthernetInterface.h" |
icraggs | 2:638c854c0695 | 29 | |
icraggs | 0:0cae29831d01 | 30 | #include "C12832_lcd.h" |
icraggs | 0:0cae29831d01 | 31 | C12832_LCD lcd; |
icraggs | 0:0cae29831d01 | 32 | |
icraggs | 2:638c854c0695 | 33 | #include "FP.cpp" |
icraggs | 2:638c854c0695 | 34 | #include "MQTTClient.h" |
icraggs | 2:638c854c0695 | 35 | |
icraggs | 2:638c854c0695 | 36 | |
icraggs | 2:638c854c0695 | 37 | |
icraggs | 2:638c854c0695 | 38 | class IPStack |
icraggs | 0:0cae29831d01 | 39 | { |
icraggs | 2:638c854c0695 | 40 | public: |
icraggs | 2:638c854c0695 | 41 | IPStack() |
icraggs | 2:638c854c0695 | 42 | { |
icraggs | 2:638c854c0695 | 43 | eth.init(); // Use DHCP |
icraggs | 2:638c854c0695 | 44 | eth.connect(); |
icraggs | 2:638c854c0695 | 45 | mysock.set_blocking(false, 1000); // 1 second Timeout |
icraggs | 2:638c854c0695 | 46 | } |
icraggs | 2:638c854c0695 | 47 | |
icraggs | 2:638c854c0695 | 48 | int connect(char* hostname, int port) |
icraggs | 2:638c854c0695 | 49 | { |
icraggs | 2:638c854c0695 | 50 | return mysock.connect(hostname, port); |
icraggs | 2:638c854c0695 | 51 | } |
icraggs | 2:638c854c0695 | 52 | |
icraggs | 2:638c854c0695 | 53 | int read(char* buffer, int len, int timeout) |
icraggs | 2:638c854c0695 | 54 | { |
icraggs | 2:638c854c0695 | 55 | mysock.set_blocking(false, timeout); |
icraggs | 2:638c854c0695 | 56 | return mysock.receive(buffer, len); |
icraggs | 2:638c854c0695 | 57 | } |
icraggs | 2:638c854c0695 | 58 | |
icraggs | 2:638c854c0695 | 59 | int write(char* buffer, int len, int timeout) |
icraggs | 2:638c854c0695 | 60 | { |
icraggs | 2:638c854c0695 | 61 | mysock.set_blocking(false, timeout); |
icraggs | 2:638c854c0695 | 62 | return mysock.send(buffer, len); |
icraggs | 2:638c854c0695 | 63 | } |
icraggs | 2:638c854c0695 | 64 | |
icraggs | 2:638c854c0695 | 65 | int disconnect() |
icraggs | 2:638c854c0695 | 66 | { |
icraggs | 2:638c854c0695 | 67 | return mysock.close(); |
icraggs | 2:638c854c0695 | 68 | } |
icraggs | 2:638c854c0695 | 69 | |
icraggs | 2:638c854c0695 | 70 | private: |
icraggs | 2:638c854c0695 | 71 | |
icraggs | 2:638c854c0695 | 72 | EthernetInterface eth; |
icraggs | 0:0cae29831d01 | 73 | TCPSocketConnection mysock; |
icraggs | 2:638c854c0695 | 74 | |
icraggs | 2:638c854c0695 | 75 | }; |
icraggs | 2:638c854c0695 | 76 | |
icraggs | 2:638c854c0695 | 77 | |
icraggs | 2:638c854c0695 | 78 | class Countdown |
icraggs | 2:638c854c0695 | 79 | { |
icraggs | 2:638c854c0695 | 80 | public: |
icraggs | 2:638c854c0695 | 81 | Countdown() |
icraggs | 2:638c854c0695 | 82 | { |
icraggs | 2:638c854c0695 | 83 | t = Timer(); |
icraggs | 2:638c854c0695 | 84 | } |
icraggs | 2:638c854c0695 | 85 | |
icraggs | 2:638c854c0695 | 86 | Countdown(int ms) |
icraggs | 2:638c854c0695 | 87 | { |
icraggs | 2:638c854c0695 | 88 | t = Timer(); |
icraggs | 2:638c854c0695 | 89 | countdown_ms(ms); |
icraggs | 2:638c854c0695 | 90 | } |
icraggs | 2:638c854c0695 | 91 | |
icraggs | 0:0cae29831d01 | 92 | |
icraggs | 2:638c854c0695 | 93 | bool expired() |
icraggs | 2:638c854c0695 | 94 | { |
icraggs | 2:638c854c0695 | 95 | return t.read_ms() >= interval_end_ms; |
icraggs | 2:638c854c0695 | 96 | } |
icraggs | 2:638c854c0695 | 97 | |
icraggs | 2:638c854c0695 | 98 | void countdown_ms(int ms) |
icraggs | 2:638c854c0695 | 99 | { |
icraggs | 2:638c854c0695 | 100 | t.stop(); |
icraggs | 2:638c854c0695 | 101 | interval_end_ms = ms; |
icraggs | 2:638c854c0695 | 102 | t.reset(); |
icraggs | 2:638c854c0695 | 103 | t.start(); |
icraggs | 2:638c854c0695 | 104 | } |
icraggs | 2:638c854c0695 | 105 | |
icraggs | 2:638c854c0695 | 106 | void countdown(int seconds) |
icraggs | 2:638c854c0695 | 107 | { |
icraggs | 2:638c854c0695 | 108 | countdown_ms(seconds * 1000); |
icraggs | 2:638c854c0695 | 109 | } |
icraggs | 2:638c854c0695 | 110 | |
icraggs | 2:638c854c0695 | 111 | int left_ms() |
icraggs | 2:638c854c0695 | 112 | { |
icraggs | 2:638c854c0695 | 113 | return interval_end_ms - t.read_ms(); |
icraggs | 2:638c854c0695 | 114 | } |
icraggs | 2:638c854c0695 | 115 | |
icraggs | 2:638c854c0695 | 116 | private: |
icraggs | 2:638c854c0695 | 117 | Timer t; |
icraggs | 2:638c854c0695 | 118 | int interval_end_ms; |
icraggs | 2:638c854c0695 | 119 | }; |
icraggs | 0:0cae29831d01 | 120 | |
icraggs | 2:638c854c0695 | 121 | int arrivedcount = 0; |
icraggs | 2:638c854c0695 | 122 | |
icraggs | 2:638c854c0695 | 123 | void messageArrived(MQTT::Message* message) |
icraggs | 2:638c854c0695 | 124 | { |
icraggs | 2:638c854c0695 | 125 | lcd.printf("Message arrived: qos %d, retained %d, dup %d, packetid %d\n", message->qos, message->retained, message->dup, message->id); |
icraggs | 2:638c854c0695 | 126 | lcd.printf("Payload %.*s\n", message->payloadlen, (char*)message->payload); |
icraggs | 2:638c854c0695 | 127 | ++arrivedcount; |
icraggs | 2:638c854c0695 | 128 | } |
icraggs | 0:0cae29831d01 | 129 | |
icraggs | 2:638c854c0695 | 130 | |
icraggs | 2:638c854c0695 | 131 | int main(int argc, char* argv[]) |
icraggs | 2:638c854c0695 | 132 | { |
icraggs | 2:638c854c0695 | 133 | IPStack ipstack = IPStack(); |
icraggs | 6:e4c690c45021 | 134 | float version = 0.42; |
icraggs | 2:638c854c0695 | 135 | char* topic = "mbed-sample"; |
icraggs | 2:638c854c0695 | 136 | |
icraggs | 2:638c854c0695 | 137 | lcd.printf("Version is %f\n", version); |
icraggs | 2:638c854c0695 | 138 | |
icraggs | 3:7a6a899de7cc | 139 | MQTT::Client<IPStack, Countdown> client = MQTT::Client<IPStack, Countdown>(ipstack); |
icraggs | 3:7a6a899de7cc | 140 | |
icraggs | 6:e4c690c45021 | 141 | char* hostname = "m2m.eclipse.org"; |
icraggs | 6:e4c690c45021 | 142 | int port = 1883; |
icraggs | 6:e4c690c45021 | 143 | lcd.printf("Connecting to %s:%d\n", hostname, port); |
icraggs | 6:e4c690c45021 | 144 | int rc = ipstack.connect(hostname, port); |
icraggs | 6:e4c690c45021 | 145 | if (rc != 0) |
icraggs | 6:e4c690c45021 | 146 | lcd.printf("rc from TCP connect is %d\n", rc); |
icraggs | 6:e4c690c45021 | 147 | |
icraggs | 6:e4c690c45021 | 148 | MQTTPacket_connectData data = MQTTPacket_connectData_initializer; |
icraggs | 6:e4c690c45021 | 149 | data.MQTTVersion = 3; |
icraggs | 6:e4c690c45021 | 150 | data.clientID.cstring = "mbed-icraggs"; |
icraggs | 6:e4c690c45021 | 151 | rc = client.connect(&data); |
icraggs | 6:e4c690c45021 | 152 | if (rc != 0) |
icraggs | 6:e4c690c45021 | 153 | lcd.printf("rc from MQTT connect is %d\n", rc); |
icraggs | 2:638c854c0695 | 154 | |
icraggs | 2:638c854c0695 | 155 | rc = client.subscribe(topic, MQTT::QOS1, messageArrived); |
icraggs | 2:638c854c0695 | 156 | if (rc != 0) |
icraggs | 2:638c854c0695 | 157 | lcd.printf("rc from MQTT subscribe is %d\n", rc); |
icraggs | 2:638c854c0695 | 158 | |
icraggs | 2:638c854c0695 | 159 | MQTT::Message message; |
icraggs | 0:0cae29831d01 | 160 | |
icraggs | 2:638c854c0695 | 161 | // QoS 0 |
icraggs | 2:638c854c0695 | 162 | char buf[100]; |
icraggs | 2:638c854c0695 | 163 | sprintf(buf, "Hello World! QoS 0 message from app version %f\n", version); |
icraggs | 2:638c854c0695 | 164 | message.qos = MQTT::QOS0; |
icraggs | 2:638c854c0695 | 165 | message.retained = false; |
icraggs | 2:638c854c0695 | 166 | message.dup = false; |
icraggs | 2:638c854c0695 | 167 | message.payload = (void*)buf; |
icraggs | 2:638c854c0695 | 168 | message.payloadlen = strlen(buf)+1; |
icraggs | 2:638c854c0695 | 169 | rc = client.publish(topic, &message); |
icraggs | 2:638c854c0695 | 170 | while (arrivedcount == 0) |
icraggs | 2:638c854c0695 | 171 | client.yield(100); |
icraggs | 2:638c854c0695 | 172 | |
icraggs | 2:638c854c0695 | 173 | // QoS 1 |
icraggs | 2:638c854c0695 | 174 | sprintf(buf, "Hello World! QoS 1 message from app version %f\n", version); |
icraggs | 2:638c854c0695 | 175 | message.qos = MQTT::QOS1; |
icraggs | 2:638c854c0695 | 176 | message.payloadlen = strlen(buf)+1; |
icraggs | 2:638c854c0695 | 177 | rc = client.publish(topic, &message); |
icraggs | 2:638c854c0695 | 178 | while (arrivedcount == 1) |
icraggs | 2:638c854c0695 | 179 | client.yield(100); |
icraggs | 2:638c854c0695 | 180 | |
icraggs | 2:638c854c0695 | 181 | // QoS 2 |
icraggs | 2:638c854c0695 | 182 | sprintf(buf, "Hello World! QoS 2 message from app version %f\n", version); |
icraggs | 2:638c854c0695 | 183 | message.qos = MQTT::QOS2; |
icraggs | 2:638c854c0695 | 184 | message.payloadlen = strlen(buf)+1; |
icraggs | 2:638c854c0695 | 185 | rc = client.publish(topic, &message); |
icraggs | 2:638c854c0695 | 186 | while (arrivedcount == 2) |
icraggs | 2:638c854c0695 | 187 | client.yield(100); |
icraggs | 2:638c854c0695 | 188 | |
icraggs | 2:638c854c0695 | 189 | rc = client.unsubscribe(topic); |
icraggs | 2:638c854c0695 | 190 | if (rc != 0) |
icraggs | 2:638c854c0695 | 191 | lcd.printf("rc from unsubscribe was %d\n", rc); |
icraggs | 2:638c854c0695 | 192 | |
icraggs | 2:638c854c0695 | 193 | rc = client.disconnect(); |
icraggs | 2:638c854c0695 | 194 | if (rc != 0) |
icraggs | 2:638c854c0695 | 195 | lcd.printf("rc from disconnect was %d\n", rc); |
icraggs | 2:638c854c0695 | 196 | |
icraggs | 2:638c854c0695 | 197 | ipstack.disconnect(); |
icraggs | 2:638c854c0695 | 198 | |
icraggs | 2:638c854c0695 | 199 | lcd.printf("Finishing with %d messages received\n", arrivedcount); |
icraggs | 2:638c854c0695 | 200 | |
icraggs | 0:0cae29831d01 | 201 | return 0; |
icraggs | 0:0cae29831d01 | 202 | } |