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@0:eb1c7bc1f4f1, 2015-09-15 (annotated)
- Committer:
- AzureIoTClient
- Date:
- Tue Sep 15 22:44:58 2015 -0700
- Revision:
- 0:eb1c7bc1f4f1
- Child:
- 4:24cbfabe1b9d
New release
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
AzureIoTClient | 0:eb1c7bc1f4f1 | 1 | // Copyright (c) Microsoft. All rights reserved. |
AzureIoTClient | 0:eb1c7bc1f4f1 | 2 | // Licensed under the MIT license. See LICENSE file in the project root for full license information. |
AzureIoTClient | 0:eb1c7bc1f4f1 | 3 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 4 | #include <stdio.h> |
AzureIoTClient | 0:eb1c7bc1f4f1 | 5 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 6 | #include "iothub_client.h" |
AzureIoTClient | 0:eb1c7bc1f4f1 | 7 | #include "iothub_message.h" |
AzureIoTClient | 0:eb1c7bc1f4f1 | 8 | #include "threadapi.h" |
AzureIoTClient | 0:eb1c7bc1f4f1 | 9 | #include "crt_abstractions.h" |
AzureIoTClient | 0:eb1c7bc1f4f1 | 10 | #include "iothubtransportamqp.h" |
AzureIoTClient | 0:eb1c7bc1f4f1 | 11 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 12 | #ifdef MBED_BUILD_TIMESTAMP |
AzureIoTClient | 0:eb1c7bc1f4f1 | 13 | #include "certs.h" |
AzureIoTClient | 0:eb1c7bc1f4f1 | 14 | #endif // MBED_BUILD_TIMESTAMP |
AzureIoTClient | 0:eb1c7bc1f4f1 | 15 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 16 | static const char* connectionString = "[device connection string]"; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 17 | static int callbackCounter; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 18 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 19 | DEFINE_ENUM_STRINGS(IOTHUB_CLIENT_CONFIRMATION_RESULT, IOTHUB_CLIENT_CONFIRMATION_RESULT_VALUES); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 20 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 21 | typedef struct EVENT_INSTANCE_TAG |
AzureIoTClient | 0:eb1c7bc1f4f1 | 22 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 23 | IOTHUB_MESSAGE_HANDLE messageHandle; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 24 | int messageTrackingId; // For tracking the messages within the user callback. |
AzureIoTClient | 0:eb1c7bc1f4f1 | 25 | } EVENT_INSTANCE; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 26 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 27 | static IOTHUBMESSAGE_DISPOSITION_RESULT ReceiveNotificationCallback(IOTHUB_MESSAGE_HANDLE notificationMessage, void* userContextCallback) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 28 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 29 | int* counter = (int*)userContextCallback; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 30 | const char* buffer; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 31 | size_t size; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 32 | if (IoTHubMessage_GetByteArray(notificationMessage, (const unsigned char**)&buffer, &size) == IOTHUB_MESSAGE_OK) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 33 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 34 | (void)printf("Received Notification [%d] with Data: <<<%.*s>>> & Size=%d\r\n", *counter, (int)size, buffer, (int)size); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 35 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 36 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 37 | // Retrieve properties from the message |
AzureIoTClient | 0:eb1c7bc1f4f1 | 38 | MAP_HANDLE mapProperties = IoTHubMessage_Properties(notificationMessage); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 39 | if (mapProperties != NULL) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 40 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 41 | const char*const* keys; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 42 | const char*const* values; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 43 | size_t propertyCount = 0; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 44 | if (Map_GetInternals(mapProperties, &keys, &values, &propertyCount) == MAP_OK) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 45 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 46 | if (propertyCount > 0) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 47 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 48 | printf("Message Properties:\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 49 | for (size_t index = 0; index < propertyCount; index++) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 50 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 51 | printf("\tKey: %s Value: %s\r\n", keys[index], values[index]); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 52 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 53 | printf("\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 54 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 55 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 56 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 57 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 58 | /* Some device specific action code goes here... */ |
AzureIoTClient | 0:eb1c7bc1f4f1 | 59 | (*counter)++; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 60 | return IOTHUBMESSAGE_ACCEPTED; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 61 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 62 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 63 | static void SendConfirmationCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 64 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 65 | EVENT_INSTANCE* eventInstance = (EVENT_INSTANCE*)userContextCallback; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 66 | (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 | 0:eb1c7bc1f4f1 | 67 | /* Some device specific action code goes here... */ |
AzureIoTClient | 0:eb1c7bc1f4f1 | 68 | callbackCounter++; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 69 | IoTHubMessage_Destroy(eventInstance->messageHandle); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 70 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 71 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 72 | static char msgText[1024]; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 73 | static char propText[1024]; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 74 | #define MESSAGE_COUNT 5 |
AzureIoTClient | 0:eb1c7bc1f4f1 | 75 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 76 | void iothub_client_sample_amqp_run(void) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 77 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 78 | IOTHUB_CLIENT_HANDLE iotHubClientHandle; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 79 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 80 | EVENT_INSTANCE messages[MESSAGE_COUNT]; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 81 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 82 | callbackCounter = 0; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 83 | int receiveContext = 0; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 84 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 85 | (void)printf("Starting the IoTHub client sample AMQP...\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 86 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 87 | if ((iotHubClientHandle = IoTHubClient_CreateFromConnectionString(connectionString, IoTHubTransportAmqp_ProvideTransportInterface)) == NULL) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 88 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 89 | (void)printf("ERROR: iotHubClientHandle is NULL!\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 90 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 91 | else |
AzureIoTClient | 0:eb1c7bc1f4f1 | 92 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 93 | #ifdef MBED_BUILD_TIMESTAMP |
AzureIoTClient | 0:eb1c7bc1f4f1 | 94 | // For mbed add the certificate information |
AzureIoTClient | 0:eb1c7bc1f4f1 | 95 | if (IoTHubClient_SetOption(iotHubClientHandle, "TrustedCerts", certificates) != IOTHUB_CLIENT_OK) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 96 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 97 | printf("failure to set option \"TrustedCerts\"\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 98 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 99 | #endif // MBED_BUILD_TIMESTAMP |
AzureIoTClient | 0:eb1c7bc1f4f1 | 100 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 101 | /* Setting Notification call back, so we can receive Commands. */ |
AzureIoTClient | 0:eb1c7bc1f4f1 | 102 | if (IoTHubClient_SetNotificationCallback(iotHubClientHandle, ReceiveNotificationCallback, &receiveContext) != IOTHUB_CLIENT_OK) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 103 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 104 | (void)printf("ERROR: IoTHubClient_SetNotificationCallback..........FAILED!\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 105 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 106 | else |
AzureIoTClient | 0:eb1c7bc1f4f1 | 107 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 108 | (void)printf("IoTHubClient_SetNotificationCallback...successful.\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 109 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 110 | /* Now that we are ready to receive commands, let's send some messages */ |
AzureIoTClient | 0:eb1c7bc1f4f1 | 111 | for (int i = 0; i < MESSAGE_COUNT; i++) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 112 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 113 | sprintf_s(msgText, sizeof(msgText), "Message_%d_From_IoTHubClient_Over_AMQP", i); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 114 | if ((messages[i].messageHandle = IoTHubMessage_CreateFromByteArray((const unsigned char*)msgText, strlen(msgText))) == NULL) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 115 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 116 | (void)printf("ERROR: iotHubMessageHandle is NULL!\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 117 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 118 | else |
AzureIoTClient | 0:eb1c7bc1f4f1 | 119 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 120 | messages[i].messageTrackingId = i; |
AzureIoTClient | 0:eb1c7bc1f4f1 | 121 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 122 | MAP_HANDLE propMap = IoTHubMessage_Properties(messages[i].messageHandle); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 123 | sprintf_s(propText, sizeof(propText), "PropMsg_%d", i); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 124 | if (Map_AddOrUpdate(propMap, "PropName", propText) != MAP_OK) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 125 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 126 | (void)printf("ERROR: Map_AddOrUpdate Failed!\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 127 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 128 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 129 | if (IoTHubClient_SendEventAsync(iotHubClientHandle, messages[i].messageHandle, SendConfirmationCallback, &messages[i]) != IOTHUB_CLIENT_OK) |
AzureIoTClient | 0:eb1c7bc1f4f1 | 130 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 131 | (void)printf("ERROR: IoTHubClient_SendEventAsync..........FAILED!\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 132 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 133 | else |
AzureIoTClient | 0:eb1c7bc1f4f1 | 134 | { |
AzureIoTClient | 0:eb1c7bc1f4f1 | 135 | (void)printf("IoTHubClient_SendEventAsync accepted data for transmission to IoT Hub.\r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 136 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 137 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 138 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 139 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 140 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 141 | /* Wait for Commands. */ |
AzureIoTClient | 0:eb1c7bc1f4f1 | 142 | (void)printf("Press any key to exit the application. \r\n"); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 143 | (void)getchar(); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 144 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 145 | |
AzureIoTClient | 0:eb1c7bc1f4f1 | 146 | IoTHubClient_Destroy(iotHubClientHandle); |
AzureIoTClient | 0:eb1c7bc1f4f1 | 147 | } |
AzureIoTClient | 0:eb1c7bc1f4f1 | 148 | } |