![](/media/cache/profiles/0230db486bc9cdd3583fee20469c7b2f.jpg.50x50_q85.jpg)
Simple usage example of MQTTS library
Dependencies: EthernetInterface MQTTS NTPClient SDFileSystem mbed-rtos mbed wolfSSL
Fork of HelloMQTT by
MQTT is light weight protocol for M2M, IoT. MQTTS adds TLS(SSL) security layer into the MQTT. This program shows simple usage example of MQTTS library.
Connect information has to be stored in SD file "connectInfo.txt", with following lines in it.
- Host Name
- User Name
- Password
- Client ID
- Topic
The program asks following information on the terminal
- Port Number to be connected. If the port is >8000 it assumes MQTTS.
- Message to be published
- Certificate file name, if MQTTS. Input file name on SD card. Simply Return key force it to no server verification. The program set up the realtime clock by NTP for certificate verification.
This program was tested with FRDM-K64F, against Sango MQTT server by Shiguredo. https://sango.shiguredo.jp/
References:
- wolfSSL Home: https://www.wolfssl.com
- Original work of MQTT: https://developer.mbed.org/teams/mqtt.
- 日本語ホーム:https://developer.mbed.org/users/wolfSSL/code/HelloMQTTS/wiki/MQTTSホーム
main.cpp@20:0404c7f31c69, 2015-08-01 (annotated)
- Committer:
- wolfSSL
- Date:
- Sat Aug 01 20:50:27 2015 +0000
- Revision:
- 20:0404c7f31c69
- Parent:
- 17:25584027fae0
Added QoS2
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 | 1:a1d5c7a6acbc | 16 | |
wolfSSL | 17:25584027fae0 | 17 | /** |
wolfSSL | 17:25584027fae0 | 18 | This is a sample program to illustrate the use of the MQTT Client library |
wolfSSL | 17:25584027fae0 | 19 | on the mbed platform. The Client class requires two classes which mediate |
wolfSSL | 17:25584027fae0 | 20 | access to system interfaces for networking and timing. As long as these two |
wolfSSL | 17:25584027fae0 | 21 | classes provide the required public programming interfaces, it does not matter |
wolfSSL | 17:25584027fae0 | 22 | what facilities they use underneath. In this program, they use the mbed |
wolfSSL | 17:25584027fae0 | 23 | system libraries. |
icraggs | 2:638c854c0695 | 24 | |
wolfSSL | 17:25584027fae0 | 25 | */ |
wolfSSL | 20:0404c7f31c69 | 26 | #define MQTTCLIENT_QOS2 1 |
icraggs | 8:a3e3113054a1 | 27 | #include "MQTTEthernet.h" |
icraggs | 2:638c854c0695 | 28 | #include "MQTTClient.h" |
icraggs | 2:638c854c0695 | 29 | |
wolfSSL | 17:25584027fae0 | 30 | #include "NTPClient.h" |
wolfSSL | 17:25584027fae0 | 31 | #include "getline.h" |
wolfSSL | 17:25584027fae0 | 32 | #include "SDFileSystem.h" |
wolfSSL | 17:25584027fae0 | 33 | SDFileSystem sdCard(PTE3, PTE1, PTE2, PTE4, "sd"); /* pins for FRDM-K64F */ |
wolfSSL | 17:25584027fae0 | 34 | const char* certFile = "/sd/mqtts-cert.pem"; |
wolfSSL | 17:25584027fae0 | 35 | |
icraggs | 2:638c854c0695 | 36 | int arrivedcount = 0; |
icraggs | 2:638c854c0695 | 37 | |
icraggs | 9:5beb8609e9f7 | 38 | void messageArrived(MQTT::MessageData& md) |
icraggs | 2:638c854c0695 | 39 | { |
icraggs | 9:5beb8609e9f7 | 40 | MQTT::Message &message = md.message; |
icraggs | 9:5beb8609e9f7 | 41 | printf("Message arrived: qos %d, retained %d, dup %d, packetid %d\n", message.qos, message.retained, message.dup, message.id); |
icraggs | 9:5beb8609e9f7 | 42 | printf("Payload %.*s\n", message.payloadlen, (char*)message.payload); |
icraggs | 2:638c854c0695 | 43 | ++arrivedcount; |
wolfSSL | 17:25584027fae0 | 44 | puts((char*)message.payload); |
wolfSSL | 17:25584027fae0 | 45 | } |
wolfSSL | 17:25584027fae0 | 46 | |
wolfSSL | 17:25584027fae0 | 47 | static char * removeNL(char *str) |
wolfSSL | 17:25584027fae0 | 48 | { |
wolfSSL | 17:25584027fae0 | 49 | for(int i=strlen(str)-1; (str[i]=='\n')||(str[i]=='\r'); i--)str[i]='\0' ; |
wolfSSL | 17:25584027fae0 | 50 | return str ; |
icraggs | 2:638c854c0695 | 51 | } |
icraggs | 0:0cae29831d01 | 52 | |
wolfSSL | 17:25584027fae0 | 53 | static bool getConnectInfo(char **hn, char **un, char **pwd, char **cID, |
wolfSSL | 17:25584027fae0 | 54 | char **tc, int *pt, char **ms, char **cert) |
wolfSSL | 17:25584027fae0 | 55 | { |
wolfSSL | 17:25584027fae0 | 56 | static char hostname[100] ; |
wolfSSL | 17:25584027fae0 | 57 | static char username[20] ; |
wolfSSL | 17:25584027fae0 | 58 | static char password[20] ; |
wolfSSL | 17:25584027fae0 | 59 | static char clientID[20] ; |
wolfSSL | 17:25584027fae0 | 60 | static char topic[50] ; |
wolfSSL | 17:25584027fae0 | 61 | static char port_s[10] ; |
wolfSSL | 17:25584027fae0 | 62 | static int port ; |
wolfSSL | 17:25584027fae0 | 63 | static char msg[100] ; |
wolfSSL | 17:25584027fae0 | 64 | static char certName[30] ; |
wolfSSL | 17:25584027fae0 | 65 | static char fullName[sizeof(certName)+10] ; |
icraggs | 2:638c854c0695 | 66 | |
wolfSSL | 17:25584027fae0 | 67 | *hn = hostname ; |
wolfSSL | 17:25584027fae0 | 68 | *un = username ; |
wolfSSL | 17:25584027fae0 | 69 | *pwd= password ; |
wolfSSL | 17:25584027fae0 | 70 | *cID= clientID ; |
wolfSSL | 17:25584027fae0 | 71 | *tc = topic ; |
wolfSSL | 17:25584027fae0 | 72 | *ms = msg ; |
wolfSSL | 17:25584027fae0 | 73 | *cert=fullName ; |
wolfSSL | 17:25584027fae0 | 74 | |
wolfSSL | 17:25584027fae0 | 75 | FILE *fp = fopen("/sd/connectInfo.txt", "r"); |
wolfSSL | 17:25584027fae0 | 76 | if (fp == NULL) { |
wolfSSL | 17:25584027fae0 | 77 | printf("Cannot open \"connectInfo.txt\"\n") ; |
wolfSSL | 17:25584027fae0 | 78 | return false ; |
wolfSSL | 17:25584027fae0 | 79 | } |
wolfSSL | 17:25584027fae0 | 80 | fgets(hostname, sizeof(hostname), fp) ; |
wolfSSL | 17:25584027fae0 | 81 | fgets(username , sizeof(username), fp); |
wolfSSL | 17:25584027fae0 | 82 | fgets(password, sizeof(password), fp) ; |
wolfSSL | 17:25584027fae0 | 83 | fgets(clientID, sizeof(clientID), fp) ; |
wolfSSL | 17:25584027fae0 | 84 | fgets(topic, sizeof(topic), fp) ; |
wolfSSL | 17:25584027fae0 | 85 | getline("Port(1883/8883): ", port_s, sizeof(port_s)) ; |
wolfSSL | 17:25584027fae0 | 86 | getline("Message: ", msg, sizeof(msg)) ; |
wolfSSL | 17:25584027fae0 | 87 | removeNL(hostname) ; |
wolfSSL | 17:25584027fae0 | 88 | removeNL(username) ; |
wolfSSL | 17:25584027fae0 | 89 | removeNL(password) ; |
wolfSSL | 17:25584027fae0 | 90 | removeNL(clientID) ; |
wolfSSL | 17:25584027fae0 | 91 | removeNL(topic) ; |
wolfSSL | 17:25584027fae0 | 92 | port = atoi(removeNL(port_s)) ; |
wolfSSL | 17:25584027fae0 | 93 | *pt = port ; |
wolfSSL | 17:25584027fae0 | 94 | printf("Connecting to %s:%d, %s\n", hostname, port, port>8000? "MQTT-TLS":"MQTT" ); |
wolfSSL | 17:25584027fae0 | 95 | if(port>8000) { |
wolfSSL | 17:25584027fae0 | 96 | getline("Cert File name: ", certName, sizeof(certName)) ; |
wolfSSL | 17:25584027fae0 | 97 | removeNL(certName) ; |
wolfSSL | 17:25584027fae0 | 98 | if(*certName != '\0') { |
wolfSSL | 17:25584027fae0 | 99 | sprintf(fullName, "/sd/%s", certName) ; |
wolfSSL | 17:25584027fae0 | 100 | FILE *fp = fopen(fullName, "r"); |
wolfSSL | 17:25584027fae0 | 101 | if (fp != NULL) { |
wolfSSL | 17:25584027fae0 | 102 | NTPClient ntp; /* set Realtime clock for cert verification */ |
wolfSSL | 17:25584027fae0 | 103 | if(ntp.setTime("ntp.jst.mfeed.ad.jp") != 0) { |
wolfSSL | 17:25584027fae0 | 104 | printf("NTP Error\n") ; |
wolfSSL | 17:25584027fae0 | 105 | return false ; |
wolfSSL | 17:25584027fae0 | 106 | } |
wolfSSL | 17:25584027fae0 | 107 | printf("Verify Server: %s\n", certName) ; |
wolfSSL | 17:25584027fae0 | 108 | } else { |
wolfSSL | 17:25584027fae0 | 109 | printf("ERROR: file not found\n") ; |
wolfSSL | 17:25584027fae0 | 110 | return false ; |
wolfSSL | 17:25584027fae0 | 111 | } |
wolfSSL | 17:25584027fae0 | 112 | } else { |
wolfSSL | 17:25584027fae0 | 113 | fullName[0] = '\0' ; |
wolfSSL | 17:25584027fae0 | 114 | printf("No verify Server\n") ; |
wolfSSL | 17:25584027fae0 | 115 | } |
wolfSSL | 17:25584027fae0 | 116 | } |
wolfSSL | 17:25584027fae0 | 117 | return true ; |
wolfSSL | 17:25584027fae0 | 118 | } |
wolfSSL | 17:25584027fae0 | 119 | |
wolfSSL | 17:25584027fae0 | 120 | void mqtt_main(void const *av) |
wolfSSL | 17:25584027fae0 | 121 | { |
icraggs | 8:a3e3113054a1 | 122 | MQTTEthernet ipstack = MQTTEthernet(); |
icraggs | 9:5beb8609e9f7 | 123 | float version = 0.47; |
wolfSSL | 17:25584027fae0 | 124 | |
sam_grove | 5:4a257f6ac09a | 125 | printf("Version is %f\n", version); |
wolfSSL | 17:25584027fae0 | 126 | printf("Version is %f\n", version); |
wolfSSL | 17:25584027fae0 | 127 | |
icraggs | 8:a3e3113054a1 | 128 | MQTT::Client<MQTTEthernet, Countdown> client = MQTT::Client<MQTTEthernet, Countdown>(ipstack); |
wolfSSL | 17:25584027fae0 | 129 | MQTTPacket_connectData data = MQTTPacket_connectData_initializer; |
wolfSSL | 17:25584027fae0 | 130 | data.MQTTVersion = 3; |
wolfSSL | 17:25584027fae0 | 131 | |
wolfSSL | 17:25584027fae0 | 132 | /* get connect info */ |
wolfSSL | 17:25584027fae0 | 133 | char *hostname ; |
wolfSSL | 17:25584027fae0 | 134 | char *username ; |
wolfSSL | 17:25584027fae0 | 135 | char *password ; |
wolfSSL | 17:25584027fae0 | 136 | char *clientID ; |
wolfSSL | 17:25584027fae0 | 137 | char *topic ; |
wolfSSL | 17:25584027fae0 | 138 | int port ; |
wolfSSL | 17:25584027fae0 | 139 | char *msg ; |
wolfSSL | 17:25584027fae0 | 140 | char *fullName ; |
wolfSSL | 17:25584027fae0 | 141 | |
wolfSSL | 17:25584027fae0 | 142 | if(!getConnectInfo(&hostname, &username, &password, &clientID, &topic, &port, &msg, &fullName)) |
wolfSSL | 17:25584027fae0 | 143 | return ; |
wolfSSL | 17:25584027fae0 | 144 | data.username.cstring = username ; |
wolfSSL | 17:25584027fae0 | 145 | data.password.cstring = password ; |
wolfSSL | 17:25584027fae0 | 146 | data.clientID.cstring = clientID ; |
wolfSSL | 17:25584027fae0 | 147 | |
wolfSSL | 17:25584027fae0 | 148 | int rc = ipstack.connect(hostname, port, port>8000 ? fullName : NULL); |
icraggs | 6:e4c690c45021 | 149 | if (rc != 0) |
wolfSSL | 17:25584027fae0 | 150 | printf("rc from TCP connect is %d\n", rc); |
wolfSSL | 17:25584027fae0 | 151 | |
icraggs | 16:28d062c5522b | 152 | if ((rc = client.connect(data)) != 0) |
wolfSSL | 17:25584027fae0 | 153 | printf("rc from MQTT connect is %d\n", rc); |
wolfSSL | 17:25584027fae0 | 154 | printf("MQTT connected\n") ; |
wolfSSL | 17:25584027fae0 | 155 | if ((rc = client.subscribe(topic, MQTT::QOS0, messageArrived)) != 0) |
wolfSSL | 17:25584027fae0 | 156 | printf("rc from MQTT subscribe is %d\n", rc); |
wolfSSL | 17:25584027fae0 | 157 | printf("Subscribed\n") ; |
icraggs | 2:638c854c0695 | 158 | MQTT::Message message; |
icraggs | 0:0cae29831d01 | 159 | |
wolfSSL | 17:25584027fae0 | 160 | // QoS 0 |
wolfSSL | 17:25584027fae0 | 161 | char buf[sizeof(message)+50] ; |
wolfSSL | 17:25584027fae0 | 162 | sprintf(buf, "\"%s\", QoS 0 message from app version %f\n", msg, version); |
icraggs | 2:638c854c0695 | 163 | message.qos = MQTT::QOS0; |
icraggs | 2:638c854c0695 | 164 | message.retained = false; |
icraggs | 2:638c854c0695 | 165 | message.dup = false; |
icraggs | 2:638c854c0695 | 166 | message.payload = (void*)buf; |
icraggs | 2:638c854c0695 | 167 | message.payloadlen = strlen(buf)+1; |
icraggs | 16:28d062c5522b | 168 | rc = client.publish(topic, message); |
wolfSSL | 17:25584027fae0 | 169 | |
wolfSSL | 17:25584027fae0 | 170 | printf("QoS0: Published to %s\n\t%s\n", topic, message.payload) ; |
icraggs | 12:086a9314e8a5 | 171 | while (arrivedcount < 1) |
icraggs | 2:638c854c0695 | 172 | client.yield(100); |
wolfSSL | 17:25584027fae0 | 173 | |
wolfSSL | 17:25584027fae0 | 174 | // QoS 1 |
wolfSSL | 17:25584027fae0 | 175 | sprintf(buf, "\"%s\", QoS 1 message from app version %f\n", msg, version); |
icraggs | 2:638c854c0695 | 176 | message.qos = MQTT::QOS1; |
wolfSSL | 17:25584027fae0 | 177 | |
icraggs | 2:638c854c0695 | 178 | message.payloadlen = strlen(buf)+1; |
icraggs | 16:28d062c5522b | 179 | rc = client.publish(topic, message); |
wolfSSL | 17:25584027fae0 | 180 | printf("QoS1: Published to %s\n\t%s\n", topic, message.payload) ; |
icraggs | 12:086a9314e8a5 | 181 | while (arrivedcount < 2) |
icraggs | 2:638c854c0695 | 182 | client.yield(100); |
wolfSSL | 17:25584027fae0 | 183 | |
wolfSSL | 20:0404c7f31c69 | 184 | #if 1 /* QoS 2 not tested */ |
wolfSSL | 17:25584027fae0 | 185 | // QoS 2 |
wolfSSL | 20:0404c7f31c69 | 186 | sprintf(buf, "\"%s\", QoS 2 message from app version %f\n", msg, version); |
icraggs | 2:638c854c0695 | 187 | message.qos = MQTT::QOS2; |
icraggs | 2:638c854c0695 | 188 | message.payloadlen = strlen(buf)+1; |
icraggs | 16:28d062c5522b | 189 | rc = client.publish(topic, message); |
wolfSSL | 17:25584027fae0 | 190 | printf("QoS2: Published to %s\n\t%s\n", topic, message.payload) ; |
icraggs | 12:086a9314e8a5 | 191 | while (arrivedcount < 3) |
icraggs | 2:638c854c0695 | 192 | client.yield(100); |
wolfSSL | 17:25584027fae0 | 193 | |
wolfSSL | 17:25584027fae0 | 194 | // n * QoS 2 |
wolfSSL | 17:25584027fae0 | 195 | for (int i = 1; i <= 10; ++i) { |
wolfSSL | 20:0404c7f31c69 | 196 | sprintf(buf, "\"%s\", QoS 2 message number %d from app version %f\n",msg, i, version); |
icraggs | 12:086a9314e8a5 | 197 | message.qos = MQTT::QOS2; |
icraggs | 12:086a9314e8a5 | 198 | message.payloadlen = strlen(buf)+1; |
icraggs | 16:28d062c5522b | 199 | rc = client.publish(topic, message); |
wolfSSL | 17:25584027fae0 | 200 | printf("QoS2[%d]: Published to %s\n\t%s\n", i, topic, message.payload) ; |
icraggs | 12:086a9314e8a5 | 201 | while (arrivedcount < i + 3) |
icraggs | 12:086a9314e8a5 | 202 | client.yield(100); |
icraggs | 12:086a9314e8a5 | 203 | } |
wolfSSL | 17:25584027fae0 | 204 | #endif |
wolfSSL | 17:25584027fae0 | 205 | |
wolfSSL | 17:25584027fae0 | 206 | printf("unsubscribing\n") ; |
icraggs | 8:a3e3113054a1 | 207 | if ((rc = client.unsubscribe(topic)) != 0) |
sam_grove | 5:4a257f6ac09a | 208 | printf("rc from unsubscribe was %d\n", rc); |
wolfSSL | 17:25584027fae0 | 209 | |
icraggs | 8:a3e3113054a1 | 210 | if ((rc = client.disconnect()) != 0) |
sam_grove | 5:4a257f6ac09a | 211 | printf("rc from disconnect was %d\n", rc); |
wolfSSL | 17:25584027fae0 | 212 | |
icraggs | 2:638c854c0695 | 213 | ipstack.disconnect(); |
wolfSSL | 17:25584027fae0 | 214 | printf("Version %.2f: finish %d msgs\n", version, arrivedcount); |
sam_grove | 5:4a257f6ac09a | 215 | printf("Finishing with %d messages received\n", arrivedcount); |
wolfSSL | 17:25584027fae0 | 216 | |
wolfSSL | 17:25584027fae0 | 217 | return ; |
icraggs | 0:0cae29831d01 | 218 | } |
wolfSSL | 17:25584027fae0 | 219 | |
wolfSSL | 17:25584027fae0 | 220 | main() |
wolfSSL | 17:25584027fae0 | 221 | { |
wolfSSL | 17:25584027fae0 | 222 | #define STACK_SIZE 24000 |
wolfSSL | 17:25584027fae0 | 223 | Thread t(mqtt_main, NULL, osPriorityNormal, STACK_SIZE); |
wolfSSL | 17:25584027fae0 | 224 | while (true) { |
wolfSSL | 17:25584027fae0 | 225 | Thread::wait(1000); |
wolfSSL | 17:25584027fae0 | 226 | } |
wolfSSL | 17:25584027fae0 | 227 | } |