Azure IoT / Mbed 2 deprecated iothub_client_sample_mqtt

IoTHub raw messaging client sample using MQTT

Dependencies:   EthernetInterface NTPClient mbed-rtos mbed wolfSSL azure_c_shared_utility iothub_client azure_umqtt_c iothub_mqtt_transport

iothub_client_sample_mqtt.c@45:c5727007e4f0, 2017-09-11 (annotated)

Committer:
AzureIoTClient
Date:
Mon Sep 11 09:24:58 2017 -0700
Revision:
45:c5727007e4f0
Parent:
44:093816abb152
Child:
47:7a04f9462a19
1.1.23

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Azure.IoT Build 2:65c172c36cf5 1 // Copyright (c) Microsoft. All rights reserved.
Azure.IoT Build 2:65c172c36cf5 2 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
Azure.IoT Build 2:65c172c36cf5 3
Azure.IoT Build 2:65c172c36cf5 4 #include <stdio.h>
Azure.IoT Build 2:65c172c36cf5 5 #include <stdlib.h>
Azure.IoT Build 2:65c172c36cf5 6
Azure.IoT Build 2:65c172c36cf5 7 #include "iothub_client.h"
Azure.IoT Build 2:65c172c36cf5 8 #include "iothub_message.h"
AzureIoTClient 6:02304619a9fa 9 #include "azure_c_shared_utility/threadapi.h"
AzureIoTClient 6:02304619a9fa 10 #include "azure_c_shared_utility/crt_abstractions.h"
Azure.IoT Build 14:0d0177062483 11 #include "azure_c_shared_utility/platform.h"
Azure.IoT Build 2:65c172c36cf5 12 #include "iothubtransportmqtt.h"
Azure.IoT Build 2:65c172c36cf5 13
Azure.IoT Build 2:65c172c36cf5 14 #ifdef MBED_BUILD_TIMESTAMP
AzureIoTClient 45:c5727007e4f0 15 #define SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 45:c5727007e4f0 16 #endif // MBED_BUILD_TIMESTAMP
AzureIoTClient 45:c5727007e4f0 17
AzureIoTClient 45:c5727007e4f0 18 #ifdef SET_TRUSTED_CERT_IN_SAMPLES
Azure.IoT Build 2:65c172c36cf5 19 #include "certs.h"
AzureIoTClient 45:c5727007e4f0 20 #endif // SET_TRUSTED_CERT_IN_SAMPLES
Azure.IoT Build 2:65c172c36cf5 21
AzureIoTClient 7:02bc67ebbe23 22 /*String containing Hostname, Device Id & Device Key in the format: */
AzureIoTClient 7:02bc67ebbe23 23 /* "HostName=<host_name>;DeviceId=<device_id>;SharedAccessKey=<device_key>" */
AzureIoTClient 7:02bc67ebbe23 24 /* "HostName=<host_name>;DeviceId=<device_id>;SharedAccessSignature=<device_sas_token>" */
Azure.IoT Build 2:65c172c36cf5 25 static const char* connectionString = "[device connection string]";
Azure.IoT Build 2:65c172c36cf5 26
Azure.IoT Build 2:65c172c36cf5 27 static int callbackCounter;
Azure.IoT Build 2:65c172c36cf5 28 static char msgText[1024];
AzureIoTClient 6:02304619a9fa 29 static char propText[1024];
Azure.IoT Build 14:0d0177062483 30 static bool g_continueRunning;
Azure.IoT Build 2:65c172c36cf5 31 #define MESSAGE_COUNT 5
Azure.IoT Build 14:0d0177062483 32 #define DOWORK_LOOP_NUM 3
Azure.IoT Build 2:65c172c36cf5 33
Azure.IoT Build 2:65c172c36cf5 34
Azure.IoT Build 2:65c172c36cf5 35 typedef struct EVENT_INSTANCE_TAG
Azure.IoT Build 2:65c172c36cf5 36 {
Azure.IoT Build 2:65c172c36cf5 37 IOTHUB_MESSAGE_HANDLE messageHandle;
AzureIoTClient 15:2f2b3dc3ecb4 38 size_t messageTrackingId; // For tracking the messages within the user callback.
Azure.IoT Build 2:65c172c36cf5 39 } EVENT_INSTANCE;
Azure.IoT Build 2:65c172c36cf5 40
Azure.IoT Build 2:65c172c36cf5 41 static IOTHUBMESSAGE_DISPOSITION_RESULT ReceiveMessageCallback(IOTHUB_MESSAGE_HANDLE message, void* userContextCallback)
Azure.IoT Build 2:65c172c36cf5 42 {
Azure.IoT Build 2:65c172c36cf5 43 int* counter = (int*)userContextCallback;
Azure.IoT Build 2:65c172c36cf5 44 const char* buffer;
Azure.IoT Build 2:65c172c36cf5 45 size_t size;
AzureIoTClient 30:0a147a179e7e 46 MAP_HANDLE mapProperties;
AzureIoTClient 30:0a147a179e7e 47 const char* messageId;
AzureIoTClient 30:0a147a179e7e 48 const char* correlationId;
AzureIoTClient 44:093816abb152 49 const char* userDefinedContentType;
AzureIoTClient 44:093816abb152 50 const char* userDefinedContentEncoding;
AzureIoTClient 10:f77bb0044e11 51
AzureIoTClient 30:0a147a179e7e 52 // Message properties
AzureIoTClient 30:0a147a179e7e 53 if ((messageId = IoTHubMessage_GetMessageId(message)) == NULL)
AzureIoTClient 30:0a147a179e7e 54 {
AzureIoTClient 30:0a147a179e7e 55 messageId = "<null>";
AzureIoTClient 30:0a147a179e7e 56 }
AzureIoTClient 30:0a147a179e7e 57
AzureIoTClient 30:0a147a179e7e 58 if ((correlationId = IoTHubMessage_GetCorrelationId(message)) == NULL)
AzureIoTClient 30:0a147a179e7e 59 {
AzureIoTClient 30:0a147a179e7e 60 correlationId = "<null>";
AzureIoTClient 30:0a147a179e7e 61 }
AzureIoTClient 30:0a147a179e7e 62
AzureIoTClient 44:093816abb152 63 if ((userDefinedContentType = IoTHubMessage_GetContentTypeSystemProperty(message)) == NULL)
AzureIoTClient 44:093816abb152 64 {
AzureIoTClient 44:093816abb152 65 userDefinedContentType = "<null>";
AzureIoTClient 44:093816abb152 66 }
AzureIoTClient 44:093816abb152 67
AzureIoTClient 44:093816abb152 68 if ((userDefinedContentEncoding = IoTHubMessage_GetContentEncodingSystemProperty(message)) == NULL)
AzureIoTClient 44:093816abb152 69 {
AzureIoTClient 44:093816abb152 70 userDefinedContentEncoding = "<null>";
AzureIoTClient 44:093816abb152 71 }
AzureIoTClient 44:093816abb152 72
AzureIoTClient 30:0a147a179e7e 73 // Message content
Azure.IoT Build 2:65c172c36cf5 74 if (IoTHubMessage_GetByteArray(message, (const unsigned char**)&buffer, &size) != IOTHUB_MESSAGE_OK)
Azure.IoT Build 2:65c172c36cf5 75 {
Azure.IoT Build 2:65c172c36cf5 76 (void)printf("unable to retrieve the message data\r\n");
Azure.IoT Build 2:65c172c36cf5 77 }
Azure.IoT Build 2:65c172c36cf5 78 else
Azure.IoT Build 2:65c172c36cf5 79 {
AzureIoTClient 44:093816abb152 80 (void)printf("Received Message [%d]\r\n Message ID: %s\r\n Correlation ID: %s\r\n Content-Type: %s\r\n Content-Encoding: %s\r\n Data: <<<%.*s>>> & Size=%d\r\n",
AzureIoTClient 44:093816abb152 81 *counter, messageId, correlationId, userDefinedContentType, userDefinedContentEncoding, (int)size, buffer, (int)size);
Azure.IoT Build 2:65c172c36cf5 82 // If we receive the work 'quit' then we stop running
AzureIoTClient 30:0a147a179e7e 83 if (size == (strlen("quit") * sizeof(char)) && memcmp(buffer, "quit", size) == 0)
Azure.IoT Build 2:65c172c36cf5 84 {
AzureIoTClient 10:f77bb0044e11 85 g_continueRunning = false;
Azure.IoT Build 2:65c172c36cf5 86 }
Azure.IoT Build 2:65c172c36cf5 87 }
Azure.IoT Build 2:65c172c36cf5 88
Azure.IoT Build 2:65c172c36cf5 89 // Retrieve properties from the message
AzureIoTClient 30:0a147a179e7e 90 mapProperties = IoTHubMessage_Properties(message);
Azure.IoT Build 2:65c172c36cf5 91 if (mapProperties != NULL)
Azure.IoT Build 2:65c172c36cf5 92 {
Azure.IoT Build 2:65c172c36cf5 93 const char*const* keys;
Azure.IoT Build 2:65c172c36cf5 94 const char*const* values;
Azure.IoT Build 2:65c172c36cf5 95 size_t propertyCount = 0;
Azure.IoT Build 2:65c172c36cf5 96 if (Map_GetInternals(mapProperties, &keys, &values, &propertyCount) == MAP_OK)
Azure.IoT Build 2:65c172c36cf5 97 {
Azure.IoT Build 2:65c172c36cf5 98 if (propertyCount > 0)
Azure.IoT Build 2:65c172c36cf5 99 {
AzureIoTClient 30:0a147a179e7e 100 size_t index;
AzureIoTClient 30:0a147a179e7e 101
AzureIoTClient 30:0a147a179e7e 102 printf(" Message Properties:\r\n");
AzureIoTClient 27:7c908b91210a 103 for (index = 0; index < propertyCount; index++)
Azure.IoT Build 2:65c172c36cf5 104 {
Azure.IoT Build 2:65c172c36cf5 105 (void)printf("\tKey: %s Value: %s\r\n", keys[index], values[index]);
Azure.IoT Build 2:65c172c36cf5 106 }
Azure.IoT Build 2:65c172c36cf5 107 (void)printf("\r\n");
Azure.IoT Build 2:65c172c36cf5 108 }
Azure.IoT Build 2:65c172c36cf5 109 }
Azure.IoT Build 2:65c172c36cf5 110 }
Azure.IoT Build 2:65c172c36cf5 111
Azure.IoT Build 2:65c172c36cf5 112 /* Some device specific action code goes here... */
Azure.IoT Build 2:65c172c36cf5 113 (*counter)++;
Azure.IoT Build 2:65c172c36cf5 114 return IOTHUBMESSAGE_ACCEPTED;
Azure.IoT Build 2:65c172c36cf5 115 }
Azure.IoT Build 2:65c172c36cf5 116
Azure.IoT Build 2:65c172c36cf5 117 static void SendConfirmationCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback)
Azure.IoT Build 2:65c172c36cf5 118 {
Azure.IoT Build 2:65c172c36cf5 119 EVENT_INSTANCE* eventInstance = (EVENT_INSTANCE*)userContextCallback;
AzureIoTClient 15:2f2b3dc3ecb4 120 (void)printf("Confirmation[%d] received for message tracking id = %zu with result = %s\r\n", callbackCounter, eventInstance->messageTrackingId, ENUM_TO_STRING(IOTHUB_CLIENT_CONFIRMATION_RESULT, result));
Azure.IoT Build 2:65c172c36cf5 121 /* Some device specific action code goes here... */
Azure.IoT Build 2:65c172c36cf5 122 callbackCounter++;
Azure.IoT Build 2:65c172c36cf5 123 IoTHubMessage_Destroy(eventInstance->messageHandle);
Azure.IoT Build 2:65c172c36cf5 124 }
Azure.IoT Build 2:65c172c36cf5 125
Azure.IoT Build 2:65c172c36cf5 126 void iothub_client_sample_mqtt_run(void)
Azure.IoT Build 2:65c172c36cf5 127 {
Azure.IoT Build 2:65c172c36cf5 128 IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle;
Azure.IoT Build 2:65c172c36cf5 129
Azure.IoT Build 2:65c172c36cf5 130 EVENT_INSTANCE messages[MESSAGE_COUNT];
Azure.IoT Build 2:65c172c36cf5 131
AzureIoTClient 10:f77bb0044e11 132 g_continueRunning = true;
Azure.IoT Build 2:65c172c36cf5 133 srand((unsigned int)time(NULL));
Azure.IoT Build 2:65c172c36cf5 134 double avgWindSpeed = 10.0;
AzureIoTClient 36:eb9d95ee6d63 135 double minTemperature = 20.0;
AzureIoTClient 36:eb9d95ee6d63 136 double minHumidity = 60.0;
Azure.IoT Build 2:65c172c36cf5 137
Azure.IoT Build 2:65c172c36cf5 138 callbackCounter = 0;
Azure.IoT Build 2:65c172c36cf5 139 int receiveContext = 0;
Azure.IoT Build 2:65c172c36cf5 140
Azure.IoT Build 2:65c172c36cf5 141 if (platform_init() != 0)
Azure.IoT Build 2:65c172c36cf5 142 {
Azure.IoT Build 2:65c172c36cf5 143 (void)printf("Failed to initialize the platform.\r\n");
Azure.IoT Build 2:65c172c36cf5 144 }
Azure.IoT Build 2:65c172c36cf5 145 else
Azure.IoT Build 2:65c172c36cf5 146 {
Azure.IoT Build 2:65c172c36cf5 147 if ((iotHubClientHandle = IoTHubClient_LL_CreateFromConnectionString(connectionString, MQTT_Protocol)) == NULL)
Azure.IoT Build 2:65c172c36cf5 148 {
Azure.IoT Build 2:65c172c36cf5 149 (void)printf("ERROR: iotHubClientHandle is NULL!\r\n");
Azure.IoT Build 2:65c172c36cf5 150 }
Azure.IoT Build 2:65c172c36cf5 151 else
Azure.IoT Build 2:65c172c36cf5 152 {
Azure.IoT Build 2:65c172c36cf5 153 bool traceOn = true;
Azure.IoT Build 2:65c172c36cf5 154 IoTHubClient_LL_SetOption(iotHubClientHandle, "logtrace", &traceOn);
Azure.IoT Build 2:65c172c36cf5 155
AzureIoTClient 45:c5727007e4f0 156 #ifdef SET_TRUSTED_CERT_IN_SAMPLES
Azure.IoT Build 2:65c172c36cf5 157 // For mbed add the certificate information
Azure.IoT Build 2:65c172c36cf5 158 if (IoTHubClient_LL_SetOption(iotHubClientHandle, "TrustedCerts", certificates) != IOTHUB_CLIENT_OK)
Azure.IoT Build 2:65c172c36cf5 159 {
Azure.IoT Build 2:65c172c36cf5 160 printf("failure to set option \"TrustedCerts\"\r\n");
Azure.IoT Build 2:65c172c36cf5 161 }
AzureIoTClient 45:c5727007e4f0 162 #endif // SET_TRUSTED_CERT_IN_SAMPLES
Azure.IoT Build 2:65c172c36cf5 163
Azure.IoT Build 2:65c172c36cf5 164 /* Setting Message call back, so we can receive Commands. */
Azure.IoT Build 2:65c172c36cf5 165 if (IoTHubClient_LL_SetMessageCallback(iotHubClientHandle, ReceiveMessageCallback, &receiveContext) != IOTHUB_CLIENT_OK)
Azure.IoT Build 2:65c172c36cf5 166 {
Azure.IoT Build 2:65c172c36cf5 167 (void)printf("ERROR: IoTHubClient_LL_SetMessageCallback..........FAILED!\r\n");
Azure.IoT Build 2:65c172c36cf5 168 }
Azure.IoT Build 2:65c172c36cf5 169 else
Azure.IoT Build 2:65c172c36cf5 170 {
Azure.IoT Build 2:65c172c36cf5 171 (void)printf("IoTHubClient_LL_SetMessageCallback...successful.\r\n");
Azure.IoT Build 2:65c172c36cf5 172
Azure.IoT Build 2:65c172c36cf5 173 /* Now that we are ready to receive commands, let's send some messages */
AzureIoTClient 10:f77bb0044e11 174 size_t iterator = 0;
AzureIoTClient 36:eb9d95ee6d63 175 double temperature = 0;
AzureIoTClient 36:eb9d95ee6d63 176 double humidity = 0;
AzureIoTClient 10:f77bb0044e11 177 do
Azure.IoT Build 2:65c172c36cf5 178 {
AzureIoTClient 10:f77bb0044e11 179 if (iterator < MESSAGE_COUNT)
Azure.IoT Build 2:65c172c36cf5 180 {
AzureIoTClient 36:eb9d95ee6d63 181 temperature = minTemperature + (rand() % 10);
AzureIoTClient 36:eb9d95ee6d63 182 humidity = minHumidity + (rand() % 20);
AzureIoTClient 36:eb9d95ee6d63 183 sprintf_s(msgText, sizeof(msgText), "{\"deviceId\":\"myFirstDevice\",\"windSpeed\":%.2f,\"temperature\":%.2f,\"humidity\":%.2f}", avgWindSpeed + (rand() % 4 + 2), temperature, humidity);
AzureIoTClient 10:f77bb0044e11 184 if ((messages[iterator].messageHandle = IoTHubMessage_CreateFromByteArray((const unsigned char*)msgText, strlen(msgText))) == NULL)
AzureIoTClient 6:02304619a9fa 185 {
AzureIoTClient 10:f77bb0044e11 186 (void)printf("ERROR: iotHubMessageHandle is NULL!\r\n");
Azure.IoT Build 2:65c172c36cf5 187 }
Azure.IoT Build 2:65c172c36cf5 188 else
Azure.IoT Build 2:65c172c36cf5 189 {
AzureIoTClient 37:fdee5b96897d 190
AzureIoTClient 37:fdee5b96897d 191 (void)IoTHubMessage_SetMessageId(messages[iterator].messageHandle, "MSG_ID");
AzureIoTClient 37:fdee5b96897d 192 (void)IoTHubMessage_SetCorrelationId(messages[iterator].messageHandle, "CORE_ID");
AzureIoTClient 44:093816abb152 193 (void)IoTHubMessage_SetContentTypeSystemProperty(messages[iterator].messageHandle, "application%2Fjson");
AzureIoTClient 44:093816abb152 194 (void)IoTHubMessage_SetContentEncodingSystemProperty(messages[iterator].messageHandle, "utf-8");
AzureIoTClient 37:fdee5b96897d 195
AzureIoTClient 10:f77bb0044e11 196 messages[iterator].messageTrackingId = iterator;
AzureIoTClient 10:f77bb0044e11 197 MAP_HANDLE propMap = IoTHubMessage_Properties(messages[iterator].messageHandle);
AzureIoTClient 36:eb9d95ee6d63 198 (void)sprintf_s(propText, sizeof(propText), temperature > 28 ? "true" : "false");
AzureIoTClient 36:eb9d95ee6d63 199 if (Map_AddOrUpdate(propMap, "temperatureAlert", propText) != MAP_OK)
AzureIoTClient 10:f77bb0044e11 200 {
AzureIoTClient 10:f77bb0044e11 201 (void)printf("ERROR: Map_AddOrUpdate Failed!\r\n");
AzureIoTClient 10:f77bb0044e11 202 }
AzureIoTClient 10:f77bb0044e11 203
AzureIoTClient 10:f77bb0044e11 204 if (IoTHubClient_LL_SendEventAsync(iotHubClientHandle, messages[iterator].messageHandle, SendConfirmationCallback, &messages[iterator]) != IOTHUB_CLIENT_OK)
AzureIoTClient 10:f77bb0044e11 205 {
AzureIoTClient 10:f77bb0044e11 206 (void)printf("ERROR: IoTHubClient_LL_SendEventAsync..........FAILED!\r\n");
AzureIoTClient 10:f77bb0044e11 207 }
AzureIoTClient 10:f77bb0044e11 208 else
AzureIoTClient 10:f77bb0044e11 209 {
AzureIoTClient 10:f77bb0044e11 210 (void)printf("IoTHubClient_LL_SendEventAsync accepted message [%d] for transmission to IoT Hub.\r\n", (int)iterator);
AzureIoTClient 10:f77bb0044e11 211 }
Azure.IoT Build 2:65c172c36cf5 212 }
AzureIoTClient 37:fdee5b96897d 213
Azure.IoT Build 2:65c172c36cf5 214 }
AzureIoTClient 10:f77bb0044e11 215 IoTHubClient_LL_DoWork(iotHubClientHandle);
AzureIoTClient 10:f77bb0044e11 216 ThreadAPI_Sleep(1);
Azure.IoT Build 2:65c172c36cf5 217
AzureIoTClient 10:f77bb0044e11 218 iterator++;
AzureIoTClient 10:f77bb0044e11 219 } while (g_continueRunning);
Azure.IoT Build 14:0d0177062483 220
Azure.IoT Build 14:0d0177062483 221 (void)printf("iothub_client_sample_mqtt has gotten quit message, call DoWork %d more time to complete final sending...\r\n", DOWORK_LOOP_NUM);
AzureIoTClient 27:7c908b91210a 222 size_t index = 0;
AzureIoTClient 27:7c908b91210a 223 for (index = 0; index < DOWORK_LOOP_NUM; index++)
Azure.IoT Build 14:0d0177062483 224 {
Azure.IoT Build 14:0d0177062483 225 IoTHubClient_LL_DoWork(iotHubClientHandle);
Azure.IoT Build 14:0d0177062483 226 ThreadAPI_Sleep(1);
Azure.IoT Build 14:0d0177062483 227 }
Azure.IoT Build 2:65c172c36cf5 228 }
Azure.IoT Build 2:65c172c36cf5 229 IoTHubClient_LL_Destroy(iotHubClientHandle);
Azure.IoT Build 2:65c172c36cf5 230 }
Azure.IoT Build 2:65c172c36cf5 231 platform_deinit();
Azure.IoT Build 2:65c172c36cf5 232 }
Azure.IoT Build 2:65c172c36cf5 233 }
AzureIoTClient 10:f77bb0044e11 234
AzureIoTClient 10:f77bb0044e11 235 int main(void)
AzureIoTClient 10:f77bb0044e11 236 {
AzureIoTClient 10:f77bb0044e11 237 iothub_client_sample_mqtt_run();
AzureIoTClient 10:f77bb0044e11 238 return 0;
AzureIoTClient 10:f77bb0044e11 239 }