Azure IoT / Mbed 2 deprecated simplesample_mqtt

A simple IoTHub sample using MQTT as transport

Dependencies:   EthernetInterface NTPClient mbed-rtos mbed wolfSSL azure_c_shared_utility iothub_client azure_umqtt_c iothub_mqtt_transport serializer

simplesample_mqtt.c@34:4eea18741566, 2017-03-24 (annotated)

Committer:
AzureIoTClient
Date:
Fri Mar 24 16:38:31 2017 -0700
Revision:
34:4eea18741566
Parent:
30:7bb030702a93
Child:
38:6661a95af557
1.1.10

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Azure.IoT Build 2:eef448cf9eb7 1 // Copyright (c) Microsoft. All rights reserved.
Azure.IoT Build 2:eef448cf9eb7 2 // Licensed under the MIT license. See LICENSE file in the project root for full license information.
Azure.IoT Build 2:eef448cf9eb7 3
Azure.IoT Build 2:eef448cf9eb7 4 #include <stdlib.h>
Azure.IoT Build 2:eef448cf9eb7 5
Azure.IoT Build 2:eef448cf9eb7 6 #include <stdio.h>
Azure.IoT Build 2:eef448cf9eb7 7 #include <stdint.h>
Azure.IoT Build 2:eef448cf9eb7 8
Azure.IoT Build 2:eef448cf9eb7 9 /* This sample uses the _LL APIs of iothub_client for example purposes.
Azure.IoT Build 2:eef448cf9eb7 10 That does not mean that MQTT only works with the _LL APIs.
Azure.IoT Build 2:eef448cf9eb7 11 Simply changing the using the convenience layer (functions not having _LL)
Azure.IoT Build 2:eef448cf9eb7 12 and removing calls to _DoWork will yield the same results. */
Azure.IoT Build 2:eef448cf9eb7 13
Azure.IoT.Build 26:3126b9d4187b 14 #ifdef ARDUINO
Azure.IoT.Build 26:3126b9d4187b 15 #include "AzureIoTHub.h"
Azure.IoT.Build 26:3126b9d4187b 16 #else
Azure.IoT Build 16:15f02cc1f940 17 #include "azure_c_shared_utility/threadapi.h"
Azure.IoT Build 16:15f02cc1f940 18 #include "azure_c_shared_utility/platform.h"
Azure.IoT Build 2:eef448cf9eb7 19 #include "serializer.h"
Azure.IoT Build 2:eef448cf9eb7 20 #include "iothub_client_ll.h"
Azure.IoT Build 2:eef448cf9eb7 21 #include "iothubtransportmqtt.h"
Azure.IoT.Build 26:3126b9d4187b 22 #endif
Azure.IoT.Build 26:3126b9d4187b 23
AzureIoTClient 6:55659b146374 24 #ifdef MBED_BUILD_TIMESTAMP
AzureIoTClient 6:55659b146374 25 #include "certs.h"
AzureIoTClient 6:55659b146374 26 #endif // MBED_BUILD_TIMESTAMP
AzureIoTClient 6:55659b146374 27
Azure.IoT Build 2:eef448cf9eb7 28
Azure.IoT Build 2:eef448cf9eb7 29 /*String containing Hostname, Device Id & Device Key in the format: */
Azure.IoT Build 2:eef448cf9eb7 30 /* "HostName=<host_name>;DeviceId=<device_id>;SharedAccessKey=<device_key>" */
Azure.IoT Build 2:eef448cf9eb7 31 static const char* connectionString = "[device connection string]";
Azure.IoT Build 2:eef448cf9eb7 32
Azure.IoT Build 2:eef448cf9eb7 33 // Define the Model
Azure.IoT Build 2:eef448cf9eb7 34 BEGIN_NAMESPACE(WeatherStation);
Azure.IoT Build 2:eef448cf9eb7 35
Azure.IoT Build 2:eef448cf9eb7 36 DECLARE_MODEL(ContosoAnemometer,
Azure.IoT Build 2:eef448cf9eb7 37 WITH_DATA(ascii_char_ptr, DeviceId),
Azure.IoT Build 2:eef448cf9eb7 38 WITH_DATA(int, WindSpeed),
Azure.IoT Build 2:eef448cf9eb7 39 WITH_ACTION(TurnFanOn),
Azure.IoT Build 2:eef448cf9eb7 40 WITH_ACTION(TurnFanOff),
Azure.IoT Build 2:eef448cf9eb7 41 WITH_ACTION(SetAirResistance, int, Position)
Azure.IoT Build 2:eef448cf9eb7 42 );
Azure.IoT Build 2:eef448cf9eb7 43
Azure.IoT Build 2:eef448cf9eb7 44 END_NAMESPACE(WeatherStation);
Azure.IoT Build 2:eef448cf9eb7 45
Azure.IoT Build 2:eef448cf9eb7 46
Azure.IoT Build 2:eef448cf9eb7 47 EXECUTE_COMMAND_RESULT TurnFanOn(ContosoAnemometer* device)
Azure.IoT Build 2:eef448cf9eb7 48 {
Azure.IoT Build 2:eef448cf9eb7 49 (void)device;
Azure.IoT Build 2:eef448cf9eb7 50 (void)printf("Turning fan on.\r\n");
Azure.IoT Build 2:eef448cf9eb7 51 return EXECUTE_COMMAND_SUCCESS;
Azure.IoT Build 2:eef448cf9eb7 52 }
Azure.IoT Build 2:eef448cf9eb7 53
Azure.IoT Build 2:eef448cf9eb7 54 EXECUTE_COMMAND_RESULT TurnFanOff(ContosoAnemometer* device)
Azure.IoT Build 2:eef448cf9eb7 55 {
Azure.IoT Build 2:eef448cf9eb7 56 (void)device;
Azure.IoT Build 2:eef448cf9eb7 57 (void)printf("Turning fan off.\r\n");
Azure.IoT Build 2:eef448cf9eb7 58 return EXECUTE_COMMAND_SUCCESS;
Azure.IoT Build 2:eef448cf9eb7 59 }
Azure.IoT Build 2:eef448cf9eb7 60
Azure.IoT Build 2:eef448cf9eb7 61 EXECUTE_COMMAND_RESULT SetAirResistance(ContosoAnemometer* device, int Position)
Azure.IoT Build 2:eef448cf9eb7 62 {
Azure.IoT Build 2:eef448cf9eb7 63 (void)device;
Azure.IoT Build 2:eef448cf9eb7 64 (void)printf("Setting Air Resistance Position to %d.\r\n", Position);
Azure.IoT Build 2:eef448cf9eb7 65 return EXECUTE_COMMAND_SUCCESS;
Azure.IoT Build 2:eef448cf9eb7 66 }
Azure.IoT Build 2:eef448cf9eb7 67
Azure.IoT Build 2:eef448cf9eb7 68 void sendCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback)
Azure.IoT Build 2:eef448cf9eb7 69 {
AzureIoTClient 17:a6f7340182f9 70 unsigned int messageTrackingId = (unsigned int)(uintptr_t)userContextCallback;
Azure.IoT Build 2:eef448cf9eb7 71
AzureIoTClient 17:a6f7340182f9 72 (void)printf("Message Id: %u Received.\r\n", messageTrackingId);
Azure.IoT Build 2:eef448cf9eb7 73
Azure.IoT Build 2:eef448cf9eb7 74 (void)printf("Result Call Back Called! Result is: %s \r\n", ENUM_TO_STRING(IOTHUB_CLIENT_CONFIRMATION_RESULT, result));
Azure.IoT Build 2:eef448cf9eb7 75 }
Azure.IoT Build 2:eef448cf9eb7 76
Azure.IoT Build 2:eef448cf9eb7 77 static void sendMessage(IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle, const unsigned char* buffer, size_t size)
Azure.IoT Build 2:eef448cf9eb7 78 {
Azure.IoT Build 2:eef448cf9eb7 79 static unsigned int messageTrackingId;
Azure.IoT Build 2:eef448cf9eb7 80 IOTHUB_MESSAGE_HANDLE messageHandle = IoTHubMessage_CreateFromByteArray(buffer, size);
Azure.IoT Build 2:eef448cf9eb7 81 if (messageHandle == NULL)
Azure.IoT Build 2:eef448cf9eb7 82 {
Azure.IoT Build 2:eef448cf9eb7 83 printf("unable to create a new IoTHubMessage\r\n");
Azure.IoT Build 2:eef448cf9eb7 84 }
Azure.IoT Build 2:eef448cf9eb7 85 else
Azure.IoT Build 2:eef448cf9eb7 86 {
Azure.IoT Build 2:eef448cf9eb7 87 if (IoTHubClient_LL_SendEventAsync(iotHubClientHandle, messageHandle, sendCallback, (void*)(uintptr_t)messageTrackingId) != IOTHUB_CLIENT_OK)
Azure.IoT Build 2:eef448cf9eb7 88 {
Azure.IoT Build 2:eef448cf9eb7 89 printf("failed to hand over the message to IoTHubClient");
Azure.IoT Build 2:eef448cf9eb7 90 }
Azure.IoT Build 2:eef448cf9eb7 91 else
Azure.IoT Build 2:eef448cf9eb7 92 {
Azure.IoT Build 2:eef448cf9eb7 93 printf("IoTHubClient accepted the message for delivery\r\n");
Azure.IoT Build 2:eef448cf9eb7 94 }
Azure.IoT Build 2:eef448cf9eb7 95 IoTHubMessage_Destroy(messageHandle);
Azure.IoT Build 2:eef448cf9eb7 96 }
Azure.IoT Build 2:eef448cf9eb7 97 messageTrackingId++;
Azure.IoT Build 2:eef448cf9eb7 98 }
Azure.IoT Build 2:eef448cf9eb7 99
Azure.IoT Build 2:eef448cf9eb7 100 /*this function "links" IoTHub to the serialization library*/
Azure.IoT Build 2:eef448cf9eb7 101 static IOTHUBMESSAGE_DISPOSITION_RESULT IoTHubMessage(IOTHUB_MESSAGE_HANDLE message, void* userContextCallback)
Azure.IoT Build 2:eef448cf9eb7 102 {
Azure.IoT Build 2:eef448cf9eb7 103 IOTHUBMESSAGE_DISPOSITION_RESULT result;
Azure.IoT Build 2:eef448cf9eb7 104 const unsigned char* buffer;
Azure.IoT Build 2:eef448cf9eb7 105 size_t size;
Azure.IoT Build 2:eef448cf9eb7 106 if (IoTHubMessage_GetByteArray(message, &buffer, &size) != IOTHUB_MESSAGE_OK)
Azure.IoT Build 2:eef448cf9eb7 107 {
Azure.IoT Build 2:eef448cf9eb7 108 printf("unable to IoTHubMessage_GetByteArray\r\n");
AzureIoTClient 30:7bb030702a93 109 result = IOTHUBMESSAGE_ABANDONED;
Azure.IoT Build 2:eef448cf9eb7 110 }
Azure.IoT Build 2:eef448cf9eb7 111 else
Azure.IoT Build 2:eef448cf9eb7 112 {
Azure.IoT Build 2:eef448cf9eb7 113 /*buffer is not zero terminated*/
Azure.IoT Build 2:eef448cf9eb7 114 char* temp = malloc(size + 1);
Azure.IoT Build 2:eef448cf9eb7 115 if (temp == NULL)
Azure.IoT Build 2:eef448cf9eb7 116 {
Azure.IoT Build 2:eef448cf9eb7 117 printf("failed to malloc\r\n");
AzureIoTClient 30:7bb030702a93 118 result = IOTHUBMESSAGE_ABANDONED;
Azure.IoT Build 2:eef448cf9eb7 119 }
Azure.IoT Build 2:eef448cf9eb7 120 else
Azure.IoT Build 2:eef448cf9eb7 121 {
AzureIoTClient 30:7bb030702a93 122 (void)memcpy(temp, buffer, size);
Azure.IoT Build 2:eef448cf9eb7 123 temp[size] = '\0';
Azure.IoT Build 2:eef448cf9eb7 124 EXECUTE_COMMAND_RESULT executeCommandResult = EXECUTE_COMMAND(userContextCallback, temp);
Azure.IoT Build 2:eef448cf9eb7 125 result =
Azure.IoT Build 2:eef448cf9eb7 126 (executeCommandResult == EXECUTE_COMMAND_ERROR) ? IOTHUBMESSAGE_ABANDONED :
Azure.IoT Build 2:eef448cf9eb7 127 (executeCommandResult == EXECUTE_COMMAND_SUCCESS) ? IOTHUBMESSAGE_ACCEPTED :
Azure.IoT Build 2:eef448cf9eb7 128 IOTHUBMESSAGE_REJECTED;
Azure.IoT Build 2:eef448cf9eb7 129 free(temp);
Azure.IoT Build 2:eef448cf9eb7 130 }
Azure.IoT Build 2:eef448cf9eb7 131 }
Azure.IoT Build 2:eef448cf9eb7 132 return result;
Azure.IoT Build 2:eef448cf9eb7 133 }
Azure.IoT Build 2:eef448cf9eb7 134
Azure.IoT Build 2:eef448cf9eb7 135 void simplesample_mqtt_run(void)
Azure.IoT Build 2:eef448cf9eb7 136 {
Azure.IoT Build 2:eef448cf9eb7 137 if (platform_init() != 0)
Azure.IoT Build 2:eef448cf9eb7 138 {
Azure.IoT Build 2:eef448cf9eb7 139 (void)printf("Failed to initialize platform.\r\n");
Azure.IoT Build 2:eef448cf9eb7 140 }
Azure.IoT Build 2:eef448cf9eb7 141 else
Azure.IoT Build 2:eef448cf9eb7 142 {
Azure.IoT Build 2:eef448cf9eb7 143 if (serializer_init(NULL) != SERIALIZER_OK)
Azure.IoT Build 2:eef448cf9eb7 144 {
Azure.IoT Build 2:eef448cf9eb7 145 (void)printf("Failed on serializer_init\r\n");
Azure.IoT Build 2:eef448cf9eb7 146 }
Azure.IoT Build 2:eef448cf9eb7 147 else
Azure.IoT Build 2:eef448cf9eb7 148 {
Azure.IoT Build 2:eef448cf9eb7 149 IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle = IoTHubClient_LL_CreateFromConnectionString(connectionString, MQTT_Protocol);
Azure.IoT Build 2:eef448cf9eb7 150 srand((unsigned int)time(NULL));
Azure.IoT Build 2:eef448cf9eb7 151 int avgWindSpeed = 10;
Azure.IoT Build 2:eef448cf9eb7 152
Azure.IoT Build 2:eef448cf9eb7 153 if (iotHubClientHandle == NULL)
Azure.IoT Build 2:eef448cf9eb7 154 {
Azure.IoT Build 2:eef448cf9eb7 155 (void)printf("Failed on IoTHubClient_LL_Create\r\n");
Azure.IoT Build 2:eef448cf9eb7 156 }
Azure.IoT Build 2:eef448cf9eb7 157 else
Azure.IoT Build 2:eef448cf9eb7 158 {
AzureIoTClient 6:55659b146374 159 #ifdef MBED_BUILD_TIMESTAMP
AzureIoTClient 6:55659b146374 160 // For mbed add the certificate information
AzureIoTClient 6:55659b146374 161 if (IoTHubClient_LL_SetOption(iotHubClientHandle, "TrustedCerts", certificates) != IOTHUB_CLIENT_OK)
AzureIoTClient 6:55659b146374 162 {
AzureIoTClient 6:55659b146374 163 (void)printf("failure to set option \"TrustedCerts\"\r\n");
AzureIoTClient 6:55659b146374 164 }
AzureIoTClient 6:55659b146374 165 #endif // MBED_BUILD_TIMESTAMP
AzureIoTClient 6:55659b146374 166
Azure.IoT Build 2:eef448cf9eb7 167
Azure.IoT Build 2:eef448cf9eb7 168 ContosoAnemometer* myWeather = CREATE_MODEL_INSTANCE(WeatherStation, ContosoAnemometer);
Azure.IoT Build 2:eef448cf9eb7 169 if (myWeather == NULL)
Azure.IoT Build 2:eef448cf9eb7 170 {
Azure.IoT Build 2:eef448cf9eb7 171 (void)printf("Failed on CREATE_MODEL_INSTANCE\r\n");
Azure.IoT Build 2:eef448cf9eb7 172 }
Azure.IoT Build 2:eef448cf9eb7 173 else
Azure.IoT Build 2:eef448cf9eb7 174 {
Azure.IoT Build 2:eef448cf9eb7 175 if (IoTHubClient_LL_SetMessageCallback(iotHubClientHandle, IoTHubMessage, myWeather) != IOTHUB_CLIENT_OK)
Azure.IoT Build 2:eef448cf9eb7 176 {
Azure.IoT Build 2:eef448cf9eb7 177 printf("unable to IoTHubClient_SetMessageCallback\r\n");
Azure.IoT Build 2:eef448cf9eb7 178 }
Azure.IoT Build 2:eef448cf9eb7 179 else
Azure.IoT Build 2:eef448cf9eb7 180 {
Azure.IoT Build 2:eef448cf9eb7 181 myWeather->DeviceId = "myFirstDevice";
Azure.IoT Build 2:eef448cf9eb7 182 myWeather->WindSpeed = avgWindSpeed + (rand() % 4 + 2);
Azure.IoT Build 2:eef448cf9eb7 183 {
Azure.IoT Build 2:eef448cf9eb7 184 unsigned char* destination;
Azure.IoT Build 2:eef448cf9eb7 185 size_t destinationSize;
AzureIoTClient 25:6b2b9feb6dc3 186 if (SERIALIZE(&destination, &destinationSize, myWeather->DeviceId, myWeather->WindSpeed) != CODEFIRST_OK)
Azure.IoT Build 2:eef448cf9eb7 187 {
Azure.IoT Build 2:eef448cf9eb7 188 (void)printf("Failed to serialize\r\n");
Azure.IoT Build 2:eef448cf9eb7 189 }
Azure.IoT Build 2:eef448cf9eb7 190 else
Azure.IoT Build 2:eef448cf9eb7 191 {
AzureIoTClient 34:4eea18741566 192 sendMessage(iotHubClientHandle, destination, destinationSize);
Azure.IoT Build 2:eef448cf9eb7 193 free(destination);
Azure.IoT Build 2:eef448cf9eb7 194 }
Azure.IoT Build 2:eef448cf9eb7 195 }
Azure.IoT Build 2:eef448cf9eb7 196
Azure.IoT Build 2:eef448cf9eb7 197 /* wait for commands */
Azure.IoT Build 2:eef448cf9eb7 198 while (1)
Azure.IoT Build 2:eef448cf9eb7 199 {
Azure.IoT Build 2:eef448cf9eb7 200 IoTHubClient_LL_DoWork(iotHubClientHandle);
Azure.IoT Build 2:eef448cf9eb7 201 ThreadAPI_Sleep(100);
Azure.IoT Build 2:eef448cf9eb7 202 }
Azure.IoT Build 2:eef448cf9eb7 203 }
Azure.IoT Build 2:eef448cf9eb7 204
Azure.IoT Build 2:eef448cf9eb7 205 DESTROY_MODEL_INSTANCE(myWeather);
Azure.IoT Build 2:eef448cf9eb7 206 }
Azure.IoT Build 2:eef448cf9eb7 207 IoTHubClient_LL_Destroy(iotHubClientHandle);
Azure.IoT Build 2:eef448cf9eb7 208 }
Azure.IoT Build 2:eef448cf9eb7 209 serializer_deinit();
Azure.IoT Build 2:eef448cf9eb7 210 }
Azure.IoT Build 2:eef448cf9eb7 211 platform_deinit();
Azure.IoT Build 2:eef448cf9eb7 212 }
Azure.IoT Build 2:eef448cf9eb7 213 }