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@36:eb9d95ee6d63, 2017-05-08 (annotated)

Committer:
AzureIoTClient
Date:
Mon May 08 10:52:19 2017 -0700
Revision:
36:eb9d95ee6d63
Parent:
30:0a147a179e7e
Child:
37:fdee5b96897d
1.1.14

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