Sille Van Landschoot / Mbed 2 deprecated MQTT-Thermostat-example

Example application using MQTT for a thermostat application.

Dependencies:   C12832 EthernetInterface LM75B MQTT MbedJSONValue RGB-fun mbed-rtos mbed

Fork of HelloMQTT_FRDMK64F by Junichi SHIBA

main_linux.cpp@3:7a6a899de7cc, 2014-05-06 (annotated)

Committer:
icraggs
Date:
Tue May 06 09:45:22 2014 +0000
Revision:
3:7a6a899de7cc
Use latest MQTT library on both mbed and Linux

Who changed what in which revision?

UserRevisionLine numberNew contents of line
icraggs 3:7a6a899de7cc 1 /*******************************************************************************
icraggs 3:7a6a899de7cc 2 * Copyright (c) 2014 IBM Corp.
icraggs 3:7a6a899de7cc 3 *
icraggs 3:7a6a899de7cc 4 * All rights reserved. This program and the accompanying materials
icraggs 3:7a6a899de7cc 5 * are made available under the terms of the Eclipse Public License v1.0
icraggs 3:7a6a899de7cc 6 * and Eclipse Distribution License v1.0 which accompany this distribution.
icraggs 3:7a6a899de7cc 7 *
icraggs 3:7a6a899de7cc 8 * The Eclipse Public License is available at
icraggs 3:7a6a899de7cc 9 * http://www.eclipse.org/legal/epl-v10.html
icraggs 3:7a6a899de7cc 10 * and the Eclipse Distribution License is available at
icraggs 3:7a6a899de7cc 11 * http://www.eclipse.org/org/documents/edl-v10.php.
icraggs 3:7a6a899de7cc 12 *
icraggs 3:7a6a899de7cc 13 * Contributors:
icraggs 3:7a6a899de7cc 14 * Ian Craggs - initial API and implementation and/or initial documentation
icraggs 3:7a6a899de7cc 15 *******************************************************************************/
icraggs 3:7a6a899de7cc 16
icraggs 3:7a6a899de7cc 17 /**
icraggs 3:7a6a899de7cc 18 This is a sample program to illustrate the use of the MQTT Client library
icraggs 3:7a6a899de7cc 19 on Linux. The Client class requires two classes which mediate
icraggs 3:7a6a899de7cc 20 access to system interfaces for networking and timing. As long as these two
icraggs 3:7a6a899de7cc 21 classes provide the required public programming interfaces, it does not matter
icraggs 3:7a6a899de7cc 22 what facilities they use underneath. In this program, they use the Linux
icraggs 3:7a6a899de7cc 23 system libraries.
icraggs 3:7a6a899de7cc 24
icraggs 3:7a6a899de7cc 25 */
icraggs 3:7a6a899de7cc 26
icraggs 3:7a6a899de7cc 27 #if defined(LINUX)
icraggs 3:7a6a899de7cc 28
icraggs 3:7a6a899de7cc 29 #include <sys/types.h>
icraggs 3:7a6a899de7cc 30 #include <sys/socket.h>
icraggs 3:7a6a899de7cc 31 #include <sys/param.h>
icraggs 3:7a6a899de7cc 32 #include <sys/time.h>
icraggs 3:7a6a899de7cc 33 #include <sys/select.h>
icraggs 3:7a6a899de7cc 34 #include <netinet/in.h>
icraggs 3:7a6a899de7cc 35 #include <netinet/tcp.h>
icraggs 3:7a6a899de7cc 36 #include <arpa/inet.h>
icraggs 3:7a6a899de7cc 37 #include <netdb.h>
icraggs 3:7a6a899de7cc 38 #include <stdio.h>
icraggs 3:7a6a899de7cc 39 #include <unistd.h>
icraggs 3:7a6a899de7cc 40 #include <errno.h>
icraggs 3:7a6a899de7cc 41 #include <fcntl.h>
icraggs 3:7a6a899de7cc 42
icraggs 3:7a6a899de7cc 43 #include <stdlib.h>
icraggs 3:7a6a899de7cc 44 #include <string.h>
icraggs 3:7a6a899de7cc 45 #include <signal.h>
icraggs 3:7a6a899de7cc 46
icraggs 3:7a6a899de7cc 47 #include "MQTTClient.h"
icraggs 3:7a6a899de7cc 48 #include "FP.cpp"
icraggs 3:7a6a899de7cc 49
icraggs 3:7a6a899de7cc 50 #define DEFAULT_STACK_SIZE -1
icraggs 3:7a6a899de7cc 51
icraggs 3:7a6a899de7cc 52
icraggs 3:7a6a899de7cc 53 class IPStack
icraggs 3:7a6a899de7cc 54 {
icraggs 3:7a6a899de7cc 55 public:
icraggs 3:7a6a899de7cc 56 IPStack()
icraggs 3:7a6a899de7cc 57 {
icraggs 3:7a6a899de7cc 58
icraggs 3:7a6a899de7cc 59 }
icraggs 3:7a6a899de7cc 60
icraggs 3:7a6a899de7cc 61 int Socket_error(const char* aString)
icraggs 3:7a6a899de7cc 62 {
icraggs 3:7a6a899de7cc 63
icraggs 3:7a6a899de7cc 64 if (errno != EINTR && errno != EAGAIN && errno != EINPROGRESS && errno != EWOULDBLOCK)
icraggs 3:7a6a899de7cc 65 {
icraggs 3:7a6a899de7cc 66 if (strcmp(aString, "shutdown") != 0 || (errno != ENOTCONN && errno != ECONNRESET))
icraggs 3:7a6a899de7cc 67 printf("Socket error %s in %s for socket %d\n", strerror(errno), aString, mysock);
icraggs 3:7a6a899de7cc 68 }
icraggs 3:7a6a899de7cc 69 return errno;
icraggs 3:7a6a899de7cc 70 }
icraggs 3:7a6a899de7cc 71
icraggs 3:7a6a899de7cc 72 int connect(const char* hostname, int port)
icraggs 3:7a6a899de7cc 73 {
icraggs 3:7a6a899de7cc 74 int type = SOCK_STREAM;
icraggs 3:7a6a899de7cc 75 struct sockaddr_in address;
icraggs 3:7a6a899de7cc 76 int rc = -1;
icraggs 3:7a6a899de7cc 77 sa_family_t family = AF_INET;
icraggs 3:7a6a899de7cc 78 struct addrinfo *result = NULL;
icraggs 3:7a6a899de7cc 79 struct addrinfo hints = {0, AF_UNSPEC, SOCK_STREAM, IPPROTO_TCP, 0, NULL, NULL, NULL};
icraggs 3:7a6a899de7cc 80
icraggs 3:7a6a899de7cc 81 if ((rc = getaddrinfo(hostname, NULL, &hints, &result)) == 0)
icraggs 3:7a6a899de7cc 82 {
icraggs 3:7a6a899de7cc 83 struct addrinfo* res = result;
icraggs 3:7a6a899de7cc 84
icraggs 3:7a6a899de7cc 85 /* prefer ip4 addresses */
icraggs 3:7a6a899de7cc 86 while (res)
icraggs 3:7a6a899de7cc 87 {
icraggs 3:7a6a899de7cc 88 if (res->ai_family == AF_INET)
icraggs 3:7a6a899de7cc 89 {
icraggs 3:7a6a899de7cc 90 result = res;
icraggs 3:7a6a899de7cc 91 break;
icraggs 3:7a6a899de7cc 92 }
icraggs 3:7a6a899de7cc 93 res = res->ai_next;
icraggs 3:7a6a899de7cc 94 }
icraggs 3:7a6a899de7cc 95
icraggs 3:7a6a899de7cc 96 if (result->ai_family == AF_INET)
icraggs 3:7a6a899de7cc 97 {
icraggs 3:7a6a899de7cc 98 address.sin_port = htons(port);
icraggs 3:7a6a899de7cc 99 address.sin_family = family = AF_INET;
icraggs 3:7a6a899de7cc 100 address.sin_addr = ((struct sockaddr_in*)(result->ai_addr))->sin_addr;
icraggs 3:7a6a899de7cc 101 }
icraggs 3:7a6a899de7cc 102 else
icraggs 3:7a6a899de7cc 103 rc = -1;
icraggs 3:7a6a899de7cc 104
icraggs 3:7a6a899de7cc 105 freeaddrinfo(result);
icraggs 3:7a6a899de7cc 106 }
icraggs 3:7a6a899de7cc 107
icraggs 3:7a6a899de7cc 108 if (rc == 0)
icraggs 3:7a6a899de7cc 109 {
icraggs 3:7a6a899de7cc 110 mysock = socket(family, type, 0);
icraggs 3:7a6a899de7cc 111 if (mysock != -1)
icraggs 3:7a6a899de7cc 112 {
icraggs 3:7a6a899de7cc 113 int opt = 1;
icraggs 3:7a6a899de7cc 114
icraggs 3:7a6a899de7cc 115 //if (setsockopt(mysock, SOL_SOCKET, SO_NOSIGPIPE, (void*)&opt, sizeof(opt)) != 0)
icraggs 3:7a6a899de7cc 116 // printf("Could not set SO_NOSIGPIPE for socket %d", mysock);
icraggs 3:7a6a899de7cc 117
icraggs 3:7a6a899de7cc 118 rc = ::connect(mysock, (struct sockaddr*)&address, sizeof(address));
icraggs 3:7a6a899de7cc 119 }
icraggs 3:7a6a899de7cc 120 }
icraggs 3:7a6a899de7cc 121
icraggs 3:7a6a899de7cc 122 return rc;
icraggs 3:7a6a899de7cc 123 }
icraggs 3:7a6a899de7cc 124
icraggs 3:7a6a899de7cc 125 int read(char* buffer, int len, int timeout_ms)
icraggs 3:7a6a899de7cc 126 {
icraggs 3:7a6a899de7cc 127 struct timeval interval = {timeout_ms / 1000, (timeout_ms % 1000) * 1000};
icraggs 3:7a6a899de7cc 128 if (interval.tv_sec < 0 || (interval.tv_sec == 0 && interval.tv_usec <= 0))
icraggs 3:7a6a899de7cc 129 {
icraggs 3:7a6a899de7cc 130 interval.tv_sec = 0;
icraggs 3:7a6a899de7cc 131 interval.tv_usec = 100;
icraggs 3:7a6a899de7cc 132 }
icraggs 3:7a6a899de7cc 133
icraggs 3:7a6a899de7cc 134 setsockopt(mysock, SOL_SOCKET, SO_RCVTIMEO, (char *)&interval, sizeof(struct timeval));
icraggs 3:7a6a899de7cc 135
icraggs 3:7a6a899de7cc 136 //printf("reading %d bytes\n", len);
icraggs 3:7a6a899de7cc 137 int rc = ::recv(mysock, buffer, (size_t)len, 0);
icraggs 3:7a6a899de7cc 138 if (rc == -1)
icraggs 3:7a6a899de7cc 139 Socket_error("read");
icraggs 3:7a6a899de7cc 140 //printf("read %d bytes\n", rc);
icraggs 3:7a6a899de7cc 141 return rc;
icraggs 3:7a6a899de7cc 142 }
icraggs 3:7a6a899de7cc 143
icraggs 3:7a6a899de7cc 144 int write(char* buffer, int len, int timeout)
icraggs 3:7a6a899de7cc 145 {
icraggs 3:7a6a899de7cc 146 struct timeval tv;
icraggs 3:7a6a899de7cc 147
icraggs 3:7a6a899de7cc 148 tv.tv_sec = 0; /* 30 Secs Timeout */
icraggs 3:7a6a899de7cc 149 tv.tv_usec = timeout * 1000; // Not init'ing this can cause strange errors
icraggs 3:7a6a899de7cc 150
icraggs 3:7a6a899de7cc 151 setsockopt(mysock, SOL_SOCKET, SO_RCVTIMEO, (char *)&tv,sizeof(struct timeval));
icraggs 3:7a6a899de7cc 152 int rc = ::write(mysock, buffer, len);
icraggs 3:7a6a899de7cc 153 //printf("write rc %d\n", rc);
icraggs 3:7a6a899de7cc 154 return rc;
icraggs 3:7a6a899de7cc 155 }
icraggs 3:7a6a899de7cc 156
icraggs 3:7a6a899de7cc 157 int disconnect()
icraggs 3:7a6a899de7cc 158 {
icraggs 3:7a6a899de7cc 159 return ::close(mysock);
icraggs 3:7a6a899de7cc 160 }
icraggs 3:7a6a899de7cc 161
icraggs 3:7a6a899de7cc 162 private:
icraggs 3:7a6a899de7cc 163
icraggs 3:7a6a899de7cc 164 int mysock;
icraggs 3:7a6a899de7cc 165
icraggs 3:7a6a899de7cc 166 };
icraggs 3:7a6a899de7cc 167
icraggs 3:7a6a899de7cc 168
icraggs 3:7a6a899de7cc 169 class Countdown
icraggs 3:7a6a899de7cc 170 {
icraggs 3:7a6a899de7cc 171 public:
icraggs 3:7a6a899de7cc 172 Countdown()
icraggs 3:7a6a899de7cc 173 {
icraggs 3:7a6a899de7cc 174
icraggs 3:7a6a899de7cc 175 }
icraggs 3:7a6a899de7cc 176
icraggs 3:7a6a899de7cc 177 Countdown(int ms)
icraggs 3:7a6a899de7cc 178 {
icraggs 3:7a6a899de7cc 179 countdown_ms(ms);
icraggs 3:7a6a899de7cc 180 }
icraggs 3:7a6a899de7cc 181
icraggs 3:7a6a899de7cc 182
icraggs 3:7a6a899de7cc 183 bool expired()
icraggs 3:7a6a899de7cc 184 {
icraggs 3:7a6a899de7cc 185 struct timeval now, res;
icraggs 3:7a6a899de7cc 186 gettimeofday(&now, NULL);
icraggs 3:7a6a899de7cc 187 timersub(&end_time, &now, &res);
icraggs 3:7a6a899de7cc 188 //printf("left %d ms\n", (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000);
icraggs 3:7a6a899de7cc 189 //if (res.tv_sec > 0 || res.tv_usec > 0)
icraggs 3:7a6a899de7cc 190 // printf("expired %d %d\n", res.tv_sec, res.tv_usec);
icraggs 3:7a6a899de7cc 191 return res.tv_sec < 0 || (res.tv_sec == 0 && res.tv_usec <= 0);
icraggs 3:7a6a899de7cc 192 }
icraggs 3:7a6a899de7cc 193
icraggs 3:7a6a899de7cc 194
icraggs 3:7a6a899de7cc 195 void countdown_ms(int ms)
icraggs 3:7a6a899de7cc 196 {
icraggs 3:7a6a899de7cc 197 struct timeval now;
icraggs 3:7a6a899de7cc 198 gettimeofday(&now, NULL);
icraggs 3:7a6a899de7cc 199 struct timeval interval = {ms / 1000, (ms % 1000) * 1000};
icraggs 3:7a6a899de7cc 200 //printf("interval %d %d\n", interval.tv_sec, interval.tv_usec);
icraggs 3:7a6a899de7cc 201 timeradd(&now, &interval, &end_time);
icraggs 3:7a6a899de7cc 202 }
icraggs 3:7a6a899de7cc 203
icraggs 3:7a6a899de7cc 204
icraggs 3:7a6a899de7cc 205 void countdown(int seconds)
icraggs 3:7a6a899de7cc 206 {
icraggs 3:7a6a899de7cc 207 struct timeval now;
icraggs 3:7a6a899de7cc 208 gettimeofday(&now, NULL);
icraggs 3:7a6a899de7cc 209 struct timeval interval = {seconds, 0};
icraggs 3:7a6a899de7cc 210 timeradd(&now, &interval, &end_time);
icraggs 3:7a6a899de7cc 211 }
icraggs 3:7a6a899de7cc 212
icraggs 3:7a6a899de7cc 213
icraggs 3:7a6a899de7cc 214 int left_ms()
icraggs 3:7a6a899de7cc 215 {
icraggs 3:7a6a899de7cc 216 struct timeval now, res;
icraggs 3:7a6a899de7cc 217 gettimeofday(&now, NULL);
icraggs 3:7a6a899de7cc 218 timersub(&end_time, &now, &res);
icraggs 3:7a6a899de7cc 219 //printf("left %d ms\n", (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000);
icraggs 3:7a6a899de7cc 220 return (res.tv_sec < 0) ? 0 : res.tv_sec * 1000 + res.tv_usec / 1000;
icraggs 3:7a6a899de7cc 221 }
icraggs 3:7a6a899de7cc 222
icraggs 3:7a6a899de7cc 223 private:
icraggs 3:7a6a899de7cc 224
icraggs 3:7a6a899de7cc 225 struct timeval end_time;
icraggs 3:7a6a899de7cc 226 };
icraggs 3:7a6a899de7cc 227
icraggs 3:7a6a899de7cc 228
icraggs 3:7a6a899de7cc 229 int arrivedcount = 0;
icraggs 3:7a6a899de7cc 230
icraggs 3:7a6a899de7cc 231 void messageArrived(MQTT::Message* message)
icraggs 3:7a6a899de7cc 232 {
icraggs 3:7a6a899de7cc 233 printf("Message %d arrived: qos %d, retained %d, dup %d, packetid %d\n",
icraggs 3:7a6a899de7cc 234 ++arrivedcount, message->qos, message->retained, message->dup, message->id);
icraggs 3:7a6a899de7cc 235 printf("Payload %.*s\n", message->payloadlen, (char*)message->payload);
icraggs 3:7a6a899de7cc 236 }
icraggs 3:7a6a899de7cc 237
icraggs 3:7a6a899de7cc 238
icraggs 3:7a6a899de7cc 239 int connect(MQTT::Client<IPStack, Countdown>::connectionLostInfo* info)
icraggs 3:7a6a899de7cc 240 {
icraggs 3:7a6a899de7cc 241 const char* hostname = "localhost"; //"m2m.eclipse.org";
icraggs 3:7a6a899de7cc 242 int port = 1883;
icraggs 3:7a6a899de7cc 243 printf("Connecting to %s:%d\n", hostname, port);
icraggs 3:7a6a899de7cc 244 int rc = info->network->connect(hostname, port);
icraggs 3:7a6a899de7cc 245 if (rc != 0)
icraggs 3:7a6a899de7cc 246 printf("rc from TCP connect is %d\n", rc);
icraggs 3:7a6a899de7cc 247
icraggs 3:7a6a899de7cc 248 MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
icraggs 3:7a6a899de7cc 249 data.MQTTVersion = 3;
icraggs 3:7a6a899de7cc 250 data.clientID.cstring = (char*)"mbed-icraggs";
icraggs 3:7a6a899de7cc 251 rc = info->client->connect(&data);
icraggs 3:7a6a899de7cc 252 if (rc != 0)
icraggs 3:7a6a899de7cc 253 printf("rc from MQTT connect is %d\n", rc);
icraggs 3:7a6a899de7cc 254
icraggs 3:7a6a899de7cc 255 return rc;
icraggs 3:7a6a899de7cc 256 }
icraggs 3:7a6a899de7cc 257
icraggs 3:7a6a899de7cc 258
icraggs 3:7a6a899de7cc 259 int main(int argc, char* argv[])
icraggs 3:7a6a899de7cc 260 {
icraggs 3:7a6a899de7cc 261 IPStack ipstack = IPStack();
icraggs 3:7a6a899de7cc 262 float version = 0.3;
icraggs 3:7a6a899de7cc 263 const char* topic = "mbed-sample";
icraggs 3:7a6a899de7cc 264
icraggs 3:7a6a899de7cc 265 printf("Version is %f\n", version);
icraggs 3:7a6a899de7cc 266
icraggs 3:7a6a899de7cc 267 MQTT::Client<IPStack, Countdown> client = MQTT::Client<IPStack, Countdown>(ipstack);
icraggs 3:7a6a899de7cc 268
icraggs 3:7a6a899de7cc 269 client.setConnectionLostHandler(connect);
icraggs 3:7a6a899de7cc 270
icraggs 3:7a6a899de7cc 271 MQTT::Client<IPStack, Countdown>::connectionLostInfo info = {&client, &ipstack};
icraggs 3:7a6a899de7cc 272 int rc = connect(&info);
icraggs 3:7a6a899de7cc 273
icraggs 3:7a6a899de7cc 274 rc = client.subscribe(topic, MQTT::QOS2, messageArrived);
icraggs 3:7a6a899de7cc 275 if (rc != 0)
icraggs 3:7a6a899de7cc 276 printf("rc from MQTT subscribe is %d\n", rc);
icraggs 3:7a6a899de7cc 277
icraggs 3:7a6a899de7cc 278 MQTT::Message message;
icraggs 3:7a6a899de7cc 279
icraggs 3:7a6a899de7cc 280 // QoS 0
icraggs 3:7a6a899de7cc 281 char buf[100];
icraggs 3:7a6a899de7cc 282 sprintf(buf, "Hello World! QoS 0 message from app version %f", version);
icraggs 3:7a6a899de7cc 283 message.qos = MQTT::QOS0;
icraggs 3:7a6a899de7cc 284 message.retained = false;
icraggs 3:7a6a899de7cc 285 message.dup = false;
icraggs 3:7a6a899de7cc 286 message.payload = (void*)buf;
icraggs 3:7a6a899de7cc 287 message.payloadlen = strlen(buf)+1;
icraggs 3:7a6a899de7cc 288 rc = client.publish(topic, &message);
icraggs 3:7a6a899de7cc 289 while (arrivedcount == 0)
icraggs 3:7a6a899de7cc 290 client.yield(100);
icraggs 3:7a6a899de7cc 291
icraggs 3:7a6a899de7cc 292 // QoS 1
icraggs 3:7a6a899de7cc 293 printf("Now QoS 1\n");
icraggs 3:7a6a899de7cc 294 sprintf(buf, "Hello World! QoS 1 message from app version %f", version);
icraggs 3:7a6a899de7cc 295 message.qos = MQTT::QOS1;
icraggs 3:7a6a899de7cc 296 message.payloadlen = strlen(buf)+1;
icraggs 3:7a6a899de7cc 297 rc = client.publish(topic, &message);
icraggs 3:7a6a899de7cc 298 while (arrivedcount == 1)
icraggs 3:7a6a899de7cc 299 client.yield(100);
icraggs 3:7a6a899de7cc 300
icraggs 3:7a6a899de7cc 301 // QoS 2
icraggs 3:7a6a899de7cc 302 sprintf(buf, "Hello World! QoS 2 message from app version %f", version);
icraggs 3:7a6a899de7cc 303 message.qos = MQTT::QOS2;
icraggs 3:7a6a899de7cc 304 message.payloadlen = strlen(buf)+1;
icraggs 3:7a6a899de7cc 305 rc = client.publish(topic, &message);
icraggs 3:7a6a899de7cc 306 while (arrivedcount == 2)
icraggs 3:7a6a899de7cc 307 client.yield(100);
icraggs 3:7a6a899de7cc 308
icraggs 3:7a6a899de7cc 309 rc = client.unsubscribe(topic);
icraggs 3:7a6a899de7cc 310 if (rc != 0)
icraggs 3:7a6a899de7cc 311 printf("rc from unsubscribe was %d\n", rc);
icraggs 3:7a6a899de7cc 312
icraggs 3:7a6a899de7cc 313 rc = client.disconnect();
icraggs 3:7a6a899de7cc 314 if (rc != 0)
icraggs 3:7a6a899de7cc 315 printf("rc from disconnect was %d\n", rc);
icraggs 3:7a6a899de7cc 316
icraggs 3:7a6a899de7cc 317 ipstack.disconnect();
icraggs 3:7a6a899de7cc 318
icraggs 3:7a6a899de7cc 319 printf("Finishing with %d messages received\n", arrivedcount);
icraggs 3:7a6a899de7cc 320
icraggs 3:7a6a899de7cc 321 return 0;
icraggs 3:7a6a899de7cc 322 }
icraggs 3:7a6a899de7cc 323
icraggs 3:7a6a899de7cc 324 #endif