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@19:de28463ff3cc, 2015-11-02 (annotated)

Committer:
AzureIoTClient
Date:
Mon Nov 02 19:21:30 2015 -0800
Revision:
19:de28463ff3cc
Parent:
17:d01a2794d5d7
Child:
20:ef0d1001c8f0
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 19:de28463ff3cc 33
AzureIoTClient 17:d01a2794d5d7 34 if (IoTHubMessage_GetByteArray(message, (const unsigned char**)&buffer, &size) == IOTHUB_MESSAGE_OK)
AzureIoTClient 17:d01a2794d5d7 35 {
AzureIoTClient 17:d01a2794d5d7 36 (void)printf("Received Message [%d] with Data: <<<%.*s>>> & Size=%d\r\n", *counter, (int)size, buffer, (int)size);
AzureIoTClient 17:d01a2794d5d7 37 }
AzureIoTClient 17:d01a2794d5d7 38
AzureIoTClient 17:d01a2794d5d7 39 // Retrieve properties from the message
AzureIoTClient 17:d01a2794d5d7 40 MAP_HANDLE mapProperties = IoTHubMessage_Properties(message);
AzureIoTClient 17:d01a2794d5d7 41 if (mapProperties != NULL)
AzureIoTClient 17:d01a2794d5d7 42 {
AzureIoTClient 17:d01a2794d5d7 43 const char*const* keys;
AzureIoTClient 17:d01a2794d5d7 44 const char*const* values;
AzureIoTClient 17:d01a2794d5d7 45 size_t propertyCount = 0;
AzureIoTClient 17:d01a2794d5d7 46 if (Map_GetInternals(mapProperties, &keys, &values, &propertyCount) == MAP_OK)
AzureIoTClient 17:d01a2794d5d7 47 {
AzureIoTClient 17:d01a2794d5d7 48 if (propertyCount > 0)
AzureIoTClient 17:d01a2794d5d7 49 {
AzureIoTClient 17:d01a2794d5d7 50 printf("Message Properties:\r\n");
AzureIoTClient 17:d01a2794d5d7 51 for (size_t index = 0; index < propertyCount; index++)
AzureIoTClient 17:d01a2794d5d7 52 {
AzureIoTClient 17:d01a2794d5d7 53 printf("\tKey: %s Value: %s\r\n", keys[index], values[index]);
AzureIoTClient 17:d01a2794d5d7 54 }
AzureIoTClient 17:d01a2794d5d7 55 printf("\r\n");
AzureIoTClient 17:d01a2794d5d7 56 }
AzureIoTClient 17:d01a2794d5d7 57 }
AzureIoTClient 17:d01a2794d5d7 58 }
AzureIoTClient 17:d01a2794d5d7 59
AzureIoTClient 17:d01a2794d5d7 60 /* Some device specific action code goes here... */
AzureIoTClient 17:d01a2794d5d7 61 (*counter)++;
AzureIoTClient 17:d01a2794d5d7 62 return IOTHUBMESSAGE_ACCEPTED;
AzureIoTClient 17:d01a2794d5d7 63 }
AzureIoTClient 17:d01a2794d5d7 64
AzureIoTClient 17:d01a2794d5d7 65 static void SendConfirmationCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback)
AzureIoTClient 17:d01a2794d5d7 66 {
AzureIoTClient 17:d01a2794d5d7 67 EVENT_INSTANCE* eventInstance = (EVENT_INSTANCE*)userContextCallback;
AzureIoTClient 17:d01a2794d5d7 68 (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 69 /* Some device specific action code goes here... */
AzureIoTClient 17:d01a2794d5d7 70 callbackCounter++;
AzureIoTClient 17:d01a2794d5d7 71 IoTHubMessage_Destroy(eventInstance->messageHandle);
AzureIoTClient 17:d01a2794d5d7 72 }
AzureIoTClient 17:d01a2794d5d7 73
AzureIoTClient 17:d01a2794d5d7 74 static char msgText[1024];
AzureIoTClient 17:d01a2794d5d7 75 static char propText[1024];
AzureIoTClient 17:d01a2794d5d7 76 #define MESSAGE_COUNT 5
AzureIoTClient 17:d01a2794d5d7 77
AzureIoTClient 17:d01a2794d5d7 78 void iothub_client_sample_amqp_run(void)
AzureIoTClient 17:d01a2794d5d7 79 {
AzureIoTClient 17:d01a2794d5d7 80 IOTHUB_CLIENT_HANDLE iotHubClientHandle;
AzureIoTClient 17:d01a2794d5d7 81
AzureIoTClient 17:d01a2794d5d7 82 EVENT_INSTANCE messages[MESSAGE_COUNT];
AzureIoTClient 17:d01a2794d5d7 83
AzureIoTClient 17:d01a2794d5d7 84 srand((unsigned int)time(NULL));
AzureIoTClient 17:d01a2794d5d7 85 double avgWindSpeed = 10.0;
AzureIoTClient 17:d01a2794d5d7 86
AzureIoTClient 17:d01a2794d5d7 87 callbackCounter = 0;
AzureIoTClient 17:d01a2794d5d7 88 int receiveContext = 0;
AzureIoTClient 17:d01a2794d5d7 89
AzureIoTClient 17:d01a2794d5d7 90 (void)printf("Starting the IoTHub client sample AMQP...\r\n");
AzureIoTClient 17:d01a2794d5d7 91
AzureIoTClient 17:d01a2794d5d7 92 if ((iotHubClientHandle = IoTHubClient_CreateFromConnectionString(connectionString, AMQP_Protocol)) == NULL)
AzureIoTClient 17:d01a2794d5d7 93 {
AzureIoTClient 17:d01a2794d5d7 94 (void)printf("ERROR: iotHubClientHandle is NULL!\r\n");
AzureIoTClient 17:d01a2794d5d7 95 }
AzureIoTClient 17:d01a2794d5d7 96 else
AzureIoTClient 17:d01a2794d5d7 97 {
AzureIoTClient 17:d01a2794d5d7 98 #ifdef MBED_BUILD_TIMESTAMP
AzureIoTClient 17:d01a2794d5d7 99 // For mbed add the certificate information
AzureIoTClient 17:d01a2794d5d7 100 if (IoTHubClient_SetOption(iotHubClientHandle, "TrustedCerts", certificates) != IOTHUB_CLIENT_OK)
AzureIoTClient 17:d01a2794d5d7 101 {
AzureIoTClient 17:d01a2794d5d7 102 printf("failure to set option \"TrustedCerts\"\r\n");
AzureIoTClient 17:d01a2794d5d7 103 }
AzureIoTClient 17:d01a2794d5d7 104 #endif // MBED_BUILD_TIMESTAMP
AzureIoTClient 17:d01a2794d5d7 105
AzureIoTClient 17:d01a2794d5d7 106 /* Setting Message call back, so we can receive Commands. */
AzureIoTClient 17:d01a2794d5d7 107 if (IoTHubClient_SetMessageCallback(iotHubClientHandle, ReceiveMessageCallback, &receiveContext) != IOTHUB_CLIENT_OK)
AzureIoTClient 17:d01a2794d5d7 108 {
AzureIoTClient 17:d01a2794d5d7 109 (void)printf("ERROR: IoTHubClient_SetMessageCallback..........FAILED!\r\n");
AzureIoTClient 17:d01a2794d5d7 110 }
AzureIoTClient 17:d01a2794d5d7 111 else
AzureIoTClient 17:d01a2794d5d7 112 {
AzureIoTClient 17:d01a2794d5d7 113 (void)printf("IoTHubClient_SetMessageCallback...successful.\r\n");
AzureIoTClient 17:d01a2794d5d7 114
AzureIoTClient 17:d01a2794d5d7 115 /* Now that we are ready to receive commands, let's send some messages */
AzureIoTClient 17:d01a2794d5d7 116 for (size_t i = 0; i < MESSAGE_COUNT; i++)
AzureIoTClient 17:d01a2794d5d7 117 {
AzureIoTClient 17:d01a2794d5d7 118 sprintf_s(msgText, sizeof(msgText), "{\"deviceId\":\"myFirstDevice\",\"windSpeed\":%.2f}", avgWindSpeed+(rand()%4+2) );
AzureIoTClient 17:d01a2794d5d7 119 if ((messages[i].messageHandle = IoTHubMessage_CreateFromByteArray((const unsigned char*)msgText, strlen(msgText))) == NULL)
AzureIoTClient 17:d01a2794d5d7 120 {
AzureIoTClient 17:d01a2794d5d7 121 (void)printf("ERROR: iotHubMessageHandle is NULL!\r\n");
AzureIoTClient 17:d01a2794d5d7 122 }
AzureIoTClient 17:d01a2794d5d7 123 else
AzureIoTClient 17:d01a2794d5d7 124 {
AzureIoTClient 17:d01a2794d5d7 125 messages[i].messageTrackingId = i;
AzureIoTClient 17:d01a2794d5d7 126
AzureIoTClient 17:d01a2794d5d7 127 MAP_HANDLE propMap = IoTHubMessage_Properties(messages[i].messageHandle);
AzureIoTClient 17:d01a2794d5d7 128 sprintf_s(propText, sizeof(propText), "PropMsg_%d", i);
AzureIoTClient 17:d01a2794d5d7 129 if (Map_AddOrUpdate(propMap, "PropName", propText) != MAP_OK)
AzureIoTClient 17:d01a2794d5d7 130 {
AzureIoTClient 17:d01a2794d5d7 131 (void)printf("ERROR: Map_AddOrUpdate Failed!\r\n");
AzureIoTClient 17:d01a2794d5d7 132 }
AzureIoTClient 17:d01a2794d5d7 133
AzureIoTClient 17:d01a2794d5d7 134 if (IoTHubClient_SendEventAsync(iotHubClientHandle, messages[i].messageHandle, SendConfirmationCallback, &messages[i]) != IOTHUB_CLIENT_OK)
AzureIoTClient 17:d01a2794d5d7 135 {
AzureIoTClient 17:d01a2794d5d7 136 (void)printf("ERROR: IoTHubClient_SendEventAsync..........FAILED!\r\n");
AzureIoTClient 17:d01a2794d5d7 137 }
AzureIoTClient 17:d01a2794d5d7 138 else
AzureIoTClient 17:d01a2794d5d7 139 {
AzureIoTClient 17:d01a2794d5d7 140 (void)printf("IoTHubClient_SendEventAsync accepted data for transmission to IoT Hub.\r\n");
AzureIoTClient 17:d01a2794d5d7 141 }
AzureIoTClient 17:d01a2794d5d7 142 }
AzureIoTClient 17:d01a2794d5d7 143 }
AzureIoTClient 17:d01a2794d5d7 144
AzureIoTClient 17:d01a2794d5d7 145 /* Wait for Commands. */
AzureIoTClient 17:d01a2794d5d7 146 (void)printf("Press any key to exit the application. \r\n");
AzureIoTClient 17:d01a2794d5d7 147 (void)getchar();
AzureIoTClient 17:d01a2794d5d7 148 }
AzureIoTClient 17:d01a2794d5d7 149
AzureIoTClient 17:d01a2794d5d7 150 IoTHubClient_Destroy(iotHubClientHandle);
AzureIoTClient 17:d01a2794d5d7 151 }
AzureIoTClient 17:d01a2794d5d7 152 }