Azure IoT / Mbed 2 deprecated iothub_client_sample_amqp

IoTHub raw messaging client sample using AMQP

Dependencies:   iothub_client EthernetInterface NTPClient iothub_amqp_transport azure_c_shared_utility mbed-rtos mbed azure_uamqp_c wolfSSL

This sample showcases the usage of Azure IoT client libraries with the AMQP transport for sending/receiving raw messages from an IoT Hub.

iothub_client_sample_amqp.c@17:d01a2794d5d7, 2015-10-22 (annotated)

Committer:
AzureIoTClient
Date:
Thu Oct 22 18:33:38 2015 -0700
Revision:
17:d01a2794d5d7
Child:
19:de28463ff3cc
v1.0.0-preview.4

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AzureIoTClient 17:d01a2794d5d7 1 // Copyright (c) Microsoft. All rights reserved.
AzureIoTClient 17:d01a2794d5d7 2 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
AzureIoTClient 17:d01a2794d5d7 3
AzureIoTClient 17:d01a2794d5d7 4 #include <stdio.h>
AzureIoTClient 17:d01a2794d5d7 5 #include <stdlib.h>
AzureIoTClient 17:d01a2794d5d7 6
AzureIoTClient 17:d01a2794d5d7 7 #include "iothub_client.h"
AzureIoTClient 17:d01a2794d5d7 8 #include "iothub_message.h"
AzureIoTClient 17:d01a2794d5d7 9 #include "threadapi.h"
AzureIoTClient 17:d01a2794d5d7 10 #include "crt_abstractions.h"
AzureIoTClient 17:d01a2794d5d7 11 #include "iothubtransportamqp.h"
AzureIoTClient 17:d01a2794d5d7 12
AzureIoTClient 17:d01a2794d5d7 13 #ifdef MBED_BUILD_TIMESTAMP
AzureIoTClient 17:d01a2794d5d7 14 #include "certs.h"
AzureIoTClient 17:d01a2794d5d7 15 #endif // MBED_BUILD_TIMESTAMP
AzureIoTClient 17:d01a2794d5d7 16
AzureIoTClient 17:d01a2794d5d7 17 static const char* connectionString = "[device connection string]";
AzureIoTClient 17:d01a2794d5d7 18 static int callbackCounter;
AzureIoTClient 17:d01a2794d5d7 19
AzureIoTClient 17:d01a2794d5d7 20 DEFINE_ENUM_STRINGS(IOTHUB_CLIENT_CONFIRMATION_RESULT, IOTHUB_CLIENT_CONFIRMATION_RESULT_VALUES);
AzureIoTClient 17:d01a2794d5d7 21
AzureIoTClient 17:d01a2794d5d7 22 typedef struct EVENT_INSTANCE_TAG
AzureIoTClient 17:d01a2794d5d7 23 {
AzureIoTClient 17:d01a2794d5d7 24 IOTHUB_MESSAGE_HANDLE messageHandle;
AzureIoTClient 17:d01a2794d5d7 25 int messageTrackingId; // For tracking the messages within the user callback.
AzureIoTClient 17:d01a2794d5d7 26 } EVENT_INSTANCE;
AzureIoTClient 17:d01a2794d5d7 27
AzureIoTClient 17:d01a2794d5d7 28 static IOTHUBMESSAGE_DISPOSITION_RESULT ReceiveMessageCallback(IOTHUB_MESSAGE_HANDLE message, void* userContextCallback)
AzureIoTClient 17:d01a2794d5d7 29 {
AzureIoTClient 17:d01a2794d5d7 30 int* counter = (int*)userContextCallback;
AzureIoTClient 17:d01a2794d5d7 31 const char* buffer;
AzureIoTClient 17:d01a2794d5d7 32 size_t size;
AzureIoTClient 17:d01a2794d5d7 33 if (IoTHubMessage_GetByteArray(message, (const unsigned char**)&buffer, &size) == IOTHUB_MESSAGE_OK)
AzureIoTClient 17:d01a2794d5d7 34 {
AzureIoTClient 17:d01a2794d5d7 35 (void)printf("Received Message [%d] with Data: <<<%.*s>>> & Size=%d\r\n", *counter, (int)size, buffer, (int)size);
AzureIoTClient 17:d01a2794d5d7 36 }
AzureIoTClient 17:d01a2794d5d7 37
AzureIoTClient 17:d01a2794d5d7 38 // Retrieve properties from the message
AzureIoTClient 17:d01a2794d5d7 39 MAP_HANDLE mapProperties = IoTHubMessage_Properties(message);
AzureIoTClient 17:d01a2794d5d7 40 if (mapProperties != NULL)
AzureIoTClient 17:d01a2794d5d7 41 {
AzureIoTClient 17:d01a2794d5d7 42 const char*const* keys;
AzureIoTClient 17:d01a2794d5d7 43 const char*const* values;
AzureIoTClient 17:d01a2794d5d7 44 size_t propertyCount = 0;
AzureIoTClient 17:d01a2794d5d7 45 if (Map_GetInternals(mapProperties, &keys, &values, &propertyCount) == MAP_OK)
AzureIoTClient 17:d01a2794d5d7 46 {
AzureIoTClient 17:d01a2794d5d7 47 if (propertyCount > 0)
AzureIoTClient 17:d01a2794d5d7 48 {
AzureIoTClient 17:d01a2794d5d7 49 printf("Message Properties:\r\n");
AzureIoTClient 17:d01a2794d5d7 50 for (size_t index = 0; index < propertyCount; index++)
AzureIoTClient 17:d01a2794d5d7 51 {
AzureIoTClient 17:d01a2794d5d7 52 printf("\tKey: %s Value: %s\r\n", keys[index], values[index]);
AzureIoTClient 17:d01a2794d5d7 53 }
AzureIoTClient 17:d01a2794d5d7 54 printf("\r\n");
AzureIoTClient 17:d01a2794d5d7 55 }
AzureIoTClient 17:d01a2794d5d7 56 }
AzureIoTClient 17:d01a2794d5d7 57 }
AzureIoTClient 17:d01a2794d5d7 58
AzureIoTClient 17:d01a2794d5d7 59 /* Some device specific action code goes here... */
AzureIoTClient 17:d01a2794d5d7 60 (*counter)++;
AzureIoTClient 17:d01a2794d5d7 61 return IOTHUBMESSAGE_ACCEPTED;
AzureIoTClient 17:d01a2794d5d7 62 }
AzureIoTClient 17:d01a2794d5d7 63
AzureIoTClient 17:d01a2794d5d7 64 static void SendConfirmationCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback)
AzureIoTClient 17:d01a2794d5d7 65 {
AzureIoTClient 17:d01a2794d5d7 66 EVENT_INSTANCE* eventInstance = (EVENT_INSTANCE*)userContextCallback;
AzureIoTClient 17:d01a2794d5d7 67 (void)printf("Confirmation[%d] received for message tracking id = %d with result = %s\r\n", callbackCounter, eventInstance->messageTrackingId, ENUM_TO_STRING(IOTHUB_CLIENT_CONFIRMATION_RESULT, result));
AzureIoTClient 17:d01a2794d5d7 68 /* Some device specific action code goes here... */
AzureIoTClient 17:d01a2794d5d7 69 callbackCounter++;
AzureIoTClient 17:d01a2794d5d7 70 IoTHubMessage_Destroy(eventInstance->messageHandle);
AzureIoTClient 17:d01a2794d5d7 71 }
AzureIoTClient 17:d01a2794d5d7 72
AzureIoTClient 17:d01a2794d5d7 73 static char msgText[1024];
AzureIoTClient 17:d01a2794d5d7 74 static char propText[1024];
AzureIoTClient 17:d01a2794d5d7 75 #define MESSAGE_COUNT 5
AzureIoTClient 17:d01a2794d5d7 76
AzureIoTClient 17:d01a2794d5d7 77 void iothub_client_sample_amqp_run(void)
AzureIoTClient 17:d01a2794d5d7 78 {
AzureIoTClient 17:d01a2794d5d7 79 IOTHUB_CLIENT_HANDLE iotHubClientHandle;
AzureIoTClient 17:d01a2794d5d7 80
AzureIoTClient 17:d01a2794d5d7 81 EVENT_INSTANCE messages[MESSAGE_COUNT];
AzureIoTClient 17:d01a2794d5d7 82
AzureIoTClient 17:d01a2794d5d7 83 srand((unsigned int)time(NULL));
AzureIoTClient 17:d01a2794d5d7 84 double avgWindSpeed = 10.0;
AzureIoTClient 17:d01a2794d5d7 85
AzureIoTClient 17:d01a2794d5d7 86 callbackCounter = 0;
AzureIoTClient 17:d01a2794d5d7 87 int receiveContext = 0;
AzureIoTClient 17:d01a2794d5d7 88
AzureIoTClient 17:d01a2794d5d7 89 (void)printf("Starting the IoTHub client sample AMQP...\r\n");
AzureIoTClient 17:d01a2794d5d7 90
AzureIoTClient 17:d01a2794d5d7 91 if ((iotHubClientHandle = IoTHubClient_CreateFromConnectionString(connectionString, AMQP_Protocol)) == NULL)
AzureIoTClient 17:d01a2794d5d7 92 {
AzureIoTClient 17:d01a2794d5d7 93 (void)printf("ERROR: iotHubClientHandle is NULL!\r\n");
AzureIoTClient 17:d01a2794d5d7 94 }
AzureIoTClient 17:d01a2794d5d7 95 else
AzureIoTClient 17:d01a2794d5d7 96 {
AzureIoTClient 17:d01a2794d5d7 97 #ifdef MBED_BUILD_TIMESTAMP
AzureIoTClient 17:d01a2794d5d7 98 // For mbed add the certificate information
AzureIoTClient 17:d01a2794d5d7 99 if (IoTHubClient_SetOption(iotHubClientHandle, "TrustedCerts", certificates) != IOTHUB_CLIENT_OK)
AzureIoTClient 17:d01a2794d5d7 100 {
AzureIoTClient 17:d01a2794d5d7 101 printf("failure to set option \"TrustedCerts\"\r\n");
AzureIoTClient 17:d01a2794d5d7 102 }
AzureIoTClient 17:d01a2794d5d7 103 #endif // MBED_BUILD_TIMESTAMP
AzureIoTClient 17:d01a2794d5d7 104
AzureIoTClient 17:d01a2794d5d7 105 /* Setting Message call back, so we can receive Commands. */
AzureIoTClient 17:d01a2794d5d7 106 if (IoTHubClient_SetMessageCallback(iotHubClientHandle, ReceiveMessageCallback, &receiveContext) != IOTHUB_CLIENT_OK)
AzureIoTClient 17:d01a2794d5d7 107 {
AzureIoTClient 17:d01a2794d5d7 108 (void)printf("ERROR: IoTHubClient_SetMessageCallback..........FAILED!\r\n");
AzureIoTClient 17:d01a2794d5d7 109 }
AzureIoTClient 17:d01a2794d5d7 110 else
AzureIoTClient 17:d01a2794d5d7 111 {
AzureIoTClient 17:d01a2794d5d7 112 (void)printf("IoTHubClient_SetMessageCallback...successful.\r\n");
AzureIoTClient 17:d01a2794d5d7 113
AzureIoTClient 17:d01a2794d5d7 114 /* Now that we are ready to receive commands, let's send some messages */
AzureIoTClient 17:d01a2794d5d7 115 for (size_t i = 0; i < MESSAGE_COUNT; i++)
AzureIoTClient 17:d01a2794d5d7 116 {
AzureIoTClient 17:d01a2794d5d7 117 sprintf_s(msgText, sizeof(msgText), "{\"deviceId\":\"myFirstDevice\",\"windSpeed\":%.2f}", avgWindSpeed+(rand()%4+2) );
AzureIoTClient 17:d01a2794d5d7 118 if ((messages[i].messageHandle = IoTHubMessage_CreateFromByteArray((const unsigned char*)msgText, strlen(msgText))) == NULL)
AzureIoTClient 17:d01a2794d5d7 119 {
AzureIoTClient 17:d01a2794d5d7 120 (void)printf("ERROR: iotHubMessageHandle is NULL!\r\n");
AzureIoTClient 17:d01a2794d5d7 121 }
AzureIoTClient 17:d01a2794d5d7 122 else
AzureIoTClient 17:d01a2794d5d7 123 {
AzureIoTClient 17:d01a2794d5d7 124 messages[i].messageTrackingId = i;
AzureIoTClient 17:d01a2794d5d7 125
AzureIoTClient 17:d01a2794d5d7 126 MAP_HANDLE propMap = IoTHubMessage_Properties(messages[i].messageHandle);
AzureIoTClient 17:d01a2794d5d7 127 sprintf_s(propText, sizeof(propText), "PropMsg_%d", i);
AzureIoTClient 17:d01a2794d5d7 128 if (Map_AddOrUpdate(propMap, "PropName", propText) != MAP_OK)
AzureIoTClient 17:d01a2794d5d7 129 {
AzureIoTClient 17:d01a2794d5d7 130 (void)printf("ERROR: Map_AddOrUpdate Failed!\r\n");
AzureIoTClient 17:d01a2794d5d7 131 }
AzureIoTClient 17:d01a2794d5d7 132
AzureIoTClient 17:d01a2794d5d7 133 if (IoTHubClient_SendEventAsync(iotHubClientHandle, messages[i].messageHandle, SendConfirmationCallback, &messages[i]) != IOTHUB_CLIENT_OK)
AzureIoTClient 17:d01a2794d5d7 134 {
AzureIoTClient 17:d01a2794d5d7 135 (void)printf("ERROR: IoTHubClient_SendEventAsync..........FAILED!\r\n");
AzureIoTClient 17:d01a2794d5d7 136 }
AzureIoTClient 17:d01a2794d5d7 137 else
AzureIoTClient 17:d01a2794d5d7 138 {
AzureIoTClient 17:d01a2794d5d7 139 (void)printf("IoTHubClient_SendEventAsync accepted data for transmission to IoT Hub.\r\n");
AzureIoTClient 17:d01a2794d5d7 140 }
AzureIoTClient 17:d01a2794d5d7 141 }
AzureIoTClient 17:d01a2794d5d7 142 }
AzureIoTClient 17:d01a2794d5d7 143
AzureIoTClient 17:d01a2794d5d7 144 /* Wait for Commands. */
AzureIoTClient 17:d01a2794d5d7 145 (void)printf("Press any key to exit the application. \r\n");
AzureIoTClient 17:d01a2794d5d7 146 (void)getchar();
AzureIoTClient 17:d01a2794d5d7 147 }
AzureIoTClient 17:d01a2794d5d7 148
AzureIoTClient 17:d01a2794d5d7 149 IoTHubClient_Destroy(iotHubClientHandle);
AzureIoTClient 17:d01a2794d5d7 150 }
AzureIoTClient 17:d01a2794d5d7 151 }