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@20:ef0d1001c8f0, 2015-12-17 (annotated)

Committer:
AzureIoTClient
Date:
Thu Dec 17 18:23:53 2015 -0800
Revision:
20:ef0d1001c8f0
Parent:
19:de28463ff3cc
Child:
26:9a91eb828b15
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 20:ef0d1001c8f0 17 /*String containing Hostname, Device Id & Device Key in the format: */
AzureIoTClient 20:ef0d1001c8f0 18 /* "HostName=<host_name>;DeviceId=<device_id>;SharedAccessKey=<device_key>" */
AzureIoTClient 17:d01a2794d5d7 19 static const char* connectionString = "[device connection string]";
AzureIoTClient 17:d01a2794d5d7 20 static int callbackCounter;
AzureIoTClient 17:d01a2794d5d7 21
AzureIoTClient 17:d01a2794d5d7 22 DEFINE_ENUM_STRINGS(IOTHUB_CLIENT_CONFIRMATION_RESULT, IOTHUB_CLIENT_CONFIRMATION_RESULT_VALUES);
AzureIoTClient 17:d01a2794d5d7 23
AzureIoTClient 17:d01a2794d5d7 24 typedef struct EVENT_INSTANCE_TAG
AzureIoTClient 17:d01a2794d5d7 25 {
AzureIoTClient 17:d01a2794d5d7 26 IOTHUB_MESSAGE_HANDLE messageHandle;
AzureIoTClient 17:d01a2794d5d7 27 int messageTrackingId; // For tracking the messages within the user callback.
AzureIoTClient 17:d01a2794d5d7 28 } EVENT_INSTANCE;
AzureIoTClient 17:d01a2794d5d7 29
AzureIoTClient 17:d01a2794d5d7 30 static IOTHUBMESSAGE_DISPOSITION_RESULT ReceiveMessageCallback(IOTHUB_MESSAGE_HANDLE message, void* userContextCallback)
AzureIoTClient 17:d01a2794d5d7 31 {
AzureIoTClient 17:d01a2794d5d7 32 int* counter = (int*)userContextCallback;
AzureIoTClient 17:d01a2794d5d7 33 const char* buffer;
AzureIoTClient 17:d01a2794d5d7 34 size_t size;
AzureIoTClient 19:de28463ff3cc 35
AzureIoTClient 17:d01a2794d5d7 36 if (IoTHubMessage_GetByteArray(message, (const unsigned char**)&buffer, &size) == IOTHUB_MESSAGE_OK)
AzureIoTClient 17:d01a2794d5d7 37 {
AzureIoTClient 17:d01a2794d5d7 38 (void)printf("Received Message [%d] with Data: <<<%.*s>>> & Size=%d\r\n", *counter, (int)size, buffer, (int)size);
AzureIoTClient 17:d01a2794d5d7 39 }
AzureIoTClient 17:d01a2794d5d7 40
AzureIoTClient 17:d01a2794d5d7 41 // Retrieve properties from the message
AzureIoTClient 17:d01a2794d5d7 42 MAP_HANDLE mapProperties = IoTHubMessage_Properties(message);
AzureIoTClient 17:d01a2794d5d7 43 if (mapProperties != NULL)
AzureIoTClient 17:d01a2794d5d7 44 {
AzureIoTClient 17:d01a2794d5d7 45 const char*const* keys;
AzureIoTClient 17:d01a2794d5d7 46 const char*const* values;
AzureIoTClient 17:d01a2794d5d7 47 size_t propertyCount = 0;
AzureIoTClient 17:d01a2794d5d7 48 if (Map_GetInternals(mapProperties, &keys, &values, &propertyCount) == MAP_OK)
AzureIoTClient 17:d01a2794d5d7 49 {
AzureIoTClient 17:d01a2794d5d7 50 if (propertyCount > 0)
AzureIoTClient 17:d01a2794d5d7 51 {
AzureIoTClient 17:d01a2794d5d7 52 printf("Message Properties:\r\n");
AzureIoTClient 17:d01a2794d5d7 53 for (size_t index = 0; index < propertyCount; index++)
AzureIoTClient 17:d01a2794d5d7 54 {
AzureIoTClient 17:d01a2794d5d7 55 printf("\tKey: %s Value: %s\r\n", keys[index], values[index]);
AzureIoTClient 17:d01a2794d5d7 56 }
AzureIoTClient 17:d01a2794d5d7 57 printf("\r\n");
AzureIoTClient 17:d01a2794d5d7 58 }
AzureIoTClient 17:d01a2794d5d7 59 }
AzureIoTClient 17:d01a2794d5d7 60 }
AzureIoTClient 17:d01a2794d5d7 61
AzureIoTClient 17:d01a2794d5d7 62 /* Some device specific action code goes here... */
AzureIoTClient 17:d01a2794d5d7 63 (*counter)++;
AzureIoTClient 17:d01a2794d5d7 64 return IOTHUBMESSAGE_ACCEPTED;
AzureIoTClient 17:d01a2794d5d7 65 }
AzureIoTClient 17:d01a2794d5d7 66
AzureIoTClient 17:d01a2794d5d7 67 static void SendConfirmationCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback)
AzureIoTClient 17:d01a2794d5d7 68 {
AzureIoTClient 17:d01a2794d5d7 69 EVENT_INSTANCE* eventInstance = (EVENT_INSTANCE*)userContextCallback;
AzureIoTClient 17:d01a2794d5d7 70 (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 71 /* Some device specific action code goes here... */
AzureIoTClient 17:d01a2794d5d7 72 callbackCounter++;
AzureIoTClient 17:d01a2794d5d7 73 IoTHubMessage_Destroy(eventInstance->messageHandle);
AzureIoTClient 17:d01a2794d5d7 74 }
AzureIoTClient 17:d01a2794d5d7 75
AzureIoTClient 17:d01a2794d5d7 76 static char msgText[1024];
AzureIoTClient 17:d01a2794d5d7 77 static char propText[1024];
AzureIoTClient 17:d01a2794d5d7 78 #define MESSAGE_COUNT 5
AzureIoTClient 17:d01a2794d5d7 79
AzureIoTClient 17:d01a2794d5d7 80 void iothub_client_sample_amqp_run(void)
AzureIoTClient 17:d01a2794d5d7 81 {
AzureIoTClient 17:d01a2794d5d7 82 IOTHUB_CLIENT_HANDLE iotHubClientHandle;
AzureIoTClient 17:d01a2794d5d7 83
AzureIoTClient 17:d01a2794d5d7 84 EVENT_INSTANCE messages[MESSAGE_COUNT];
AzureIoTClient 17:d01a2794d5d7 85
AzureIoTClient 17:d01a2794d5d7 86 srand((unsigned int)time(NULL));
AzureIoTClient 17:d01a2794d5d7 87 double avgWindSpeed = 10.0;
AzureIoTClient 17:d01a2794d5d7 88
AzureIoTClient 17:d01a2794d5d7 89 callbackCounter = 0;
AzureIoTClient 17:d01a2794d5d7 90 int receiveContext = 0;
AzureIoTClient 17:d01a2794d5d7 91
AzureIoTClient 17:d01a2794d5d7 92 (void)printf("Starting the IoTHub client sample AMQP...\r\n");
AzureIoTClient 17:d01a2794d5d7 93
AzureIoTClient 17:d01a2794d5d7 94 if ((iotHubClientHandle = IoTHubClient_CreateFromConnectionString(connectionString, AMQP_Protocol)) == NULL)
AzureIoTClient 17:d01a2794d5d7 95 {
AzureIoTClient 17:d01a2794d5d7 96 (void)printf("ERROR: iotHubClientHandle is NULL!\r\n");
AzureIoTClient 17:d01a2794d5d7 97 }
AzureIoTClient 17:d01a2794d5d7 98 else
AzureIoTClient 17:d01a2794d5d7 99 {
AzureIoTClient 17:d01a2794d5d7 100 #ifdef MBED_BUILD_TIMESTAMP
AzureIoTClient 17:d01a2794d5d7 101 // For mbed add the certificate information
AzureIoTClient 17:d01a2794d5d7 102 if (IoTHubClient_SetOption(iotHubClientHandle, "TrustedCerts", certificates) != IOTHUB_CLIENT_OK)
AzureIoTClient 17:d01a2794d5d7 103 {
AzureIoTClient 17:d01a2794d5d7 104 printf("failure to set option \"TrustedCerts\"\r\n");
AzureIoTClient 17:d01a2794d5d7 105 }
AzureIoTClient 17:d01a2794d5d7 106 #endif // MBED_BUILD_TIMESTAMP
AzureIoTClient 17:d01a2794d5d7 107
AzureIoTClient 17:d01a2794d5d7 108 /* Setting Message call back, so we can receive Commands. */
AzureIoTClient 17:d01a2794d5d7 109 if (IoTHubClient_SetMessageCallback(iotHubClientHandle, ReceiveMessageCallback, &receiveContext) != IOTHUB_CLIENT_OK)
AzureIoTClient 17:d01a2794d5d7 110 {
AzureIoTClient 17:d01a2794d5d7 111 (void)printf("ERROR: IoTHubClient_SetMessageCallback..........FAILED!\r\n");
AzureIoTClient 17:d01a2794d5d7 112 }
AzureIoTClient 17:d01a2794d5d7 113 else
AzureIoTClient 17:d01a2794d5d7 114 {
AzureIoTClient 17:d01a2794d5d7 115 (void)printf("IoTHubClient_SetMessageCallback...successful.\r\n");
AzureIoTClient 17:d01a2794d5d7 116
AzureIoTClient 17:d01a2794d5d7 117 /* Now that we are ready to receive commands, let's send some messages */
AzureIoTClient 17:d01a2794d5d7 118 for (size_t i = 0; i < MESSAGE_COUNT; i++)
AzureIoTClient 17:d01a2794d5d7 119 {
AzureIoTClient 17:d01a2794d5d7 120 sprintf_s(msgText, sizeof(msgText), "{\"deviceId\":\"myFirstDevice\",\"windSpeed\":%.2f}", avgWindSpeed+(rand()%4+2) );
AzureIoTClient 17:d01a2794d5d7 121 if ((messages[i].messageHandle = IoTHubMessage_CreateFromByteArray((const unsigned char*)msgText, strlen(msgText))) == NULL)
AzureIoTClient 17:d01a2794d5d7 122 {
AzureIoTClient 17:d01a2794d5d7 123 (void)printf("ERROR: iotHubMessageHandle is NULL!\r\n");
AzureIoTClient 17:d01a2794d5d7 124 }
AzureIoTClient 17:d01a2794d5d7 125 else
AzureIoTClient 17:d01a2794d5d7 126 {
AzureIoTClient 17:d01a2794d5d7 127 messages[i].messageTrackingId = i;
AzureIoTClient 17:d01a2794d5d7 128
AzureIoTClient 17:d01a2794d5d7 129 MAP_HANDLE propMap = IoTHubMessage_Properties(messages[i].messageHandle);
AzureIoTClient 17:d01a2794d5d7 130 sprintf_s(propText, sizeof(propText), "PropMsg_%d", i);
AzureIoTClient 17:d01a2794d5d7 131 if (Map_AddOrUpdate(propMap, "PropName", propText) != MAP_OK)
AzureIoTClient 17:d01a2794d5d7 132 {
AzureIoTClient 17:d01a2794d5d7 133 (void)printf("ERROR: Map_AddOrUpdate Failed!\r\n");
AzureIoTClient 17:d01a2794d5d7 134 }
AzureIoTClient 17:d01a2794d5d7 135
AzureIoTClient 17:d01a2794d5d7 136 if (IoTHubClient_SendEventAsync(iotHubClientHandle, messages[i].messageHandle, SendConfirmationCallback, &messages[i]) != IOTHUB_CLIENT_OK)
AzureIoTClient 17:d01a2794d5d7 137 {
AzureIoTClient 17:d01a2794d5d7 138 (void)printf("ERROR: IoTHubClient_SendEventAsync..........FAILED!\r\n");
AzureIoTClient 17:d01a2794d5d7 139 }
AzureIoTClient 17:d01a2794d5d7 140 else
AzureIoTClient 17:d01a2794d5d7 141 {
AzureIoTClient 17:d01a2794d5d7 142 (void)printf("IoTHubClient_SendEventAsync accepted data for transmission to IoT Hub.\r\n");
AzureIoTClient 17:d01a2794d5d7 143 }
AzureIoTClient 17:d01a2794d5d7 144 }
AzureIoTClient 17:d01a2794d5d7 145 }
AzureIoTClient 17:d01a2794d5d7 146
AzureIoTClient 17:d01a2794d5d7 147 /* Wait for Commands. */
AzureIoTClient 17:d01a2794d5d7 148 (void)printf("Press any key to exit the application. \r\n");
AzureIoTClient 17:d01a2794d5d7 149 (void)getchar();
AzureIoTClient 17:d01a2794d5d7 150 }
AzureIoTClient 17:d01a2794d5d7 151
AzureIoTClient 17:d01a2794d5d7 152 IoTHubClient_Destroy(iotHubClientHandle);
AzureIoTClient 17:d01a2794d5d7 153 }
AzureIoTClient 17:d01a2794d5d7 154 }