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@26:9a91eb828b15, 2016-01-29 (annotated)
- Committer:
- AzureIoTClient
- Date:
- Fri Jan 29 20:20:42 2016 +0000
- Revision:
- 26:9a91eb828b15
- Parent:
- 20:ef0d1001c8f0
- Child:
- 28:a1105bba4bb1
stablizing
Who changed what in which revision?
User | Revision | Line number | New 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 | 26:9a91eb828b15 | 19 | static const char* connectionString = "HostName=iot-sdks-test.azure-devices.net;DeviceId=toercola;SharedAccessKey=84fCHgQOj5uPL+k18x0UidZAUOG7gvWJIWGxqIQKUkk="; |
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 | 26:9a91eb828b15 | 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 | } |