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@51:90c6d50af45f, 2017-11-17 (annotated)

Committer:
AzureIoTClient
Date:
Fri Nov 17 14:02:41 2017 -0800
Revision:
51:90c6d50af45f
Parent:
47:5a11f794a6ae
Child:
52:e7a6a18a9c0f
1.1.28

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 47:5a11f794a6ae 25 #define SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 47:5a11f794a6ae 26 #endif // MBED_BUILD_TIMESTAMP
AzureIoTClient 47:5a11f794a6ae 27
AzureIoTClient 47:5a11f794a6ae 28 #ifdef SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 6:55659b146374 29 #include "certs.h"
AzureIoTClient 47:5a11f794a6ae 30 #endif // SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 6:55659b146374 31
Azure.IoT Build 2:eef448cf9eb7 32
Azure.IoT Build 2:eef448cf9eb7 33 /*String containing Hostname, Device Id & Device Key in the format: */
Azure.IoT Build 2:eef448cf9eb7 34 /* "HostName=<host_name>;DeviceId=<device_id>;SharedAccessKey=<device_key>" */
Azure.IoT Build 2:eef448cf9eb7 35 static const char* connectionString = "[device connection string]";
Azure.IoT Build 2:eef448cf9eb7 36
Azure.IoT Build 2:eef448cf9eb7 37 // Define the Model
Azure.IoT Build 2:eef448cf9eb7 38 BEGIN_NAMESPACE(WeatherStation);
Azure.IoT Build 2:eef448cf9eb7 39
Azure.IoT Build 2:eef448cf9eb7 40 DECLARE_MODEL(ContosoAnemometer,
Azure.IoT Build 2:eef448cf9eb7 41 WITH_DATA(ascii_char_ptr, DeviceId),
Azure.IoT Build 2:eef448cf9eb7 42 WITH_DATA(int, WindSpeed),
AzureIoTClient 38:6661a95af557 43 WITH_DATA(float, Temperature),
AzureIoTClient 38:6661a95af557 44 WITH_DATA(float, Humidity),
Azure.IoT Build 2:eef448cf9eb7 45 WITH_ACTION(TurnFanOn),
Azure.IoT Build 2:eef448cf9eb7 46 WITH_ACTION(TurnFanOff),
Azure.IoT Build 2:eef448cf9eb7 47 WITH_ACTION(SetAirResistance, int, Position)
Azure.IoT Build 2:eef448cf9eb7 48 );
Azure.IoT Build 2:eef448cf9eb7 49
Azure.IoT Build 2:eef448cf9eb7 50 END_NAMESPACE(WeatherStation);
Azure.IoT Build 2:eef448cf9eb7 51
AzureIoTClient 38:6661a95af557 52 static char propText[1024];
Azure.IoT Build 2:eef448cf9eb7 53
Azure.IoT Build 2:eef448cf9eb7 54 EXECUTE_COMMAND_RESULT TurnFanOn(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 on.\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 TurnFanOff(ContosoAnemometer* device)
Azure.IoT Build 2:eef448cf9eb7 62 {
Azure.IoT Build 2:eef448cf9eb7 63 (void)device;
Azure.IoT Build 2:eef448cf9eb7 64 (void)printf("Turning fan off.\r\n");
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 EXECUTE_COMMAND_RESULT SetAirResistance(ContosoAnemometer* device, int Position)
Azure.IoT Build 2:eef448cf9eb7 69 {
Azure.IoT Build 2:eef448cf9eb7 70 (void)device;
Azure.IoT Build 2:eef448cf9eb7 71 (void)printf("Setting Air Resistance Position to %d.\r\n", Position);
Azure.IoT Build 2:eef448cf9eb7 72 return EXECUTE_COMMAND_SUCCESS;
Azure.IoT Build 2:eef448cf9eb7 73 }
Azure.IoT Build 2:eef448cf9eb7 74
Azure.IoT Build 2:eef448cf9eb7 75 void sendCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback)
Azure.IoT Build 2:eef448cf9eb7 76 {
AzureIoTClient 17:a6f7340182f9 77 unsigned int messageTrackingId = (unsigned int)(uintptr_t)userContextCallback;
Azure.IoT Build 2:eef448cf9eb7 78
AzureIoTClient 17:a6f7340182f9 79 (void)printf("Message Id: %u Received.\r\n", messageTrackingId);
Azure.IoT Build 2:eef448cf9eb7 80
Azure.IoT Build 2:eef448cf9eb7 81 (void)printf("Result Call Back Called! Result is: %s \r\n", ENUM_TO_STRING(IOTHUB_CLIENT_CONFIRMATION_RESULT, result));
Azure.IoT Build 2:eef448cf9eb7 82 }
Azure.IoT Build 2:eef448cf9eb7 83
AzureIoTClient 38:6661a95af557 84 static void sendMessage(IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle, const unsigned char* buffer, size_t size, ContosoAnemometer *myWeather)
Azure.IoT Build 2:eef448cf9eb7 85 {
Azure.IoT Build 2:eef448cf9eb7 86 static unsigned int messageTrackingId;
Azure.IoT Build 2:eef448cf9eb7 87 IOTHUB_MESSAGE_HANDLE messageHandle = IoTHubMessage_CreateFromByteArray(buffer, size);
Azure.IoT Build 2:eef448cf9eb7 88 if (messageHandle == NULL)
Azure.IoT Build 2:eef448cf9eb7 89 {
Azure.IoT Build 2:eef448cf9eb7 90 printf("unable to create a new IoTHubMessage\r\n");
Azure.IoT Build 2:eef448cf9eb7 91 }
Azure.IoT Build 2:eef448cf9eb7 92 else
Azure.IoT Build 2:eef448cf9eb7 93 {
AzureIoTClient 38:6661a95af557 94 MAP_HANDLE propMap = IoTHubMessage_Properties(messageHandle);
AzureIoTClient 38:6661a95af557 95 (void)sprintf_s(propText, sizeof(propText), myWeather->Temperature > 28 ? "true" : "false");
AzureIoTClient 38:6661a95af557 96 if (Map_AddOrUpdate(propMap, "temperatureAlert", propText) != MAP_OK)
AzureIoTClient 38:6661a95af557 97 {
AzureIoTClient 38:6661a95af557 98 (void)printf("ERROR: Map_AddOrUpdate Failed!\r\n");
AzureIoTClient 38:6661a95af557 99 }
AzureIoTClient 38:6661a95af557 100
Azure.IoT Build 2:eef448cf9eb7 101 if (IoTHubClient_LL_SendEventAsync(iotHubClientHandle, messageHandle, sendCallback, (void*)(uintptr_t)messageTrackingId) != IOTHUB_CLIENT_OK)
Azure.IoT Build 2:eef448cf9eb7 102 {
Azure.IoT Build 2:eef448cf9eb7 103 printf("failed to hand over the message to IoTHubClient");
Azure.IoT Build 2:eef448cf9eb7 104 }
Azure.IoT Build 2:eef448cf9eb7 105 else
Azure.IoT Build 2:eef448cf9eb7 106 {
Azure.IoT Build 2:eef448cf9eb7 107 printf("IoTHubClient accepted the message for delivery\r\n");
Azure.IoT Build 2:eef448cf9eb7 108 }
Azure.IoT Build 2:eef448cf9eb7 109 IoTHubMessage_Destroy(messageHandle);
Azure.IoT Build 2:eef448cf9eb7 110 }
Azure.IoT Build 2:eef448cf9eb7 111 messageTrackingId++;
Azure.IoT Build 2:eef448cf9eb7 112 }
Azure.IoT Build 2:eef448cf9eb7 113
Azure.IoT Build 2:eef448cf9eb7 114 /*this function "links" IoTHub to the serialization library*/
Azure.IoT Build 2:eef448cf9eb7 115 static IOTHUBMESSAGE_DISPOSITION_RESULT IoTHubMessage(IOTHUB_MESSAGE_HANDLE message, void* userContextCallback)
Azure.IoT Build 2:eef448cf9eb7 116 {
Azure.IoT Build 2:eef448cf9eb7 117 const unsigned char* buffer;
Azure.IoT Build 2:eef448cf9eb7 118 size_t size;
Azure.IoT Build 2:eef448cf9eb7 119 if (IoTHubMessage_GetByteArray(message, &buffer, &size) != IOTHUB_MESSAGE_OK)
Azure.IoT Build 2:eef448cf9eb7 120 {
AzureIoTClient 51:90c6d50af45f 121 (void)printf("unable to IoTHubMessage_GetByteArray\r\n");
Azure.IoT Build 2:eef448cf9eb7 122 }
Azure.IoT Build 2:eef448cf9eb7 123 else
Azure.IoT Build 2:eef448cf9eb7 124 {
Azure.IoT Build 2:eef448cf9eb7 125 /*buffer is not zero terminated*/
Azure.IoT Build 2:eef448cf9eb7 126 char* temp = malloc(size + 1);
Azure.IoT Build 2:eef448cf9eb7 127 if (temp == NULL)
Azure.IoT Build 2:eef448cf9eb7 128 {
AzureIoTClient 51:90c6d50af45f 129 (void)printf("failed to malloc\r\n");
Azure.IoT Build 2:eef448cf9eb7 130 }
Azure.IoT Build 2:eef448cf9eb7 131 else
Azure.IoT Build 2:eef448cf9eb7 132 {
AzureIoTClient 30:7bb030702a93 133 (void)memcpy(temp, buffer, size);
Azure.IoT Build 2:eef448cf9eb7 134 temp[size] = '\0';
Azure.IoT Build 2:eef448cf9eb7 135 EXECUTE_COMMAND_RESULT executeCommandResult = EXECUTE_COMMAND(userContextCallback, temp);
AzureIoTClient 51:90c6d50af45f 136 if (executeCommandResult != EXECUTE_COMMAND_SUCCESS)
AzureIoTClient 51:90c6d50af45f 137 {
AzureIoTClient 51:90c6d50af45f 138 (void)printf("Execute command failed\r\n");
AzureIoTClient 51:90c6d50af45f 139 }
Azure.IoT Build 2:eef448cf9eb7 140 free(temp);
Azure.IoT Build 2:eef448cf9eb7 141 }
Azure.IoT Build 2:eef448cf9eb7 142 }
AzureIoTClient 51:90c6d50af45f 143 // MQTT can only accept messages
AzureIoTClient 51:90c6d50af45f 144 return IOTHUBMESSAGE_ACCEPTED;
Azure.IoT Build 2:eef448cf9eb7 145 }
Azure.IoT Build 2:eef448cf9eb7 146
Azure.IoT Build 2:eef448cf9eb7 147 void simplesample_mqtt_run(void)
Azure.IoT Build 2:eef448cf9eb7 148 {
Azure.IoT Build 2:eef448cf9eb7 149 if (platform_init() != 0)
Azure.IoT Build 2:eef448cf9eb7 150 {
Azure.IoT Build 2:eef448cf9eb7 151 (void)printf("Failed to initialize platform.\r\n");
Azure.IoT Build 2:eef448cf9eb7 152 }
Azure.IoT Build 2:eef448cf9eb7 153 else
Azure.IoT Build 2:eef448cf9eb7 154 {
Azure.IoT Build 2:eef448cf9eb7 155 if (serializer_init(NULL) != SERIALIZER_OK)
Azure.IoT Build 2:eef448cf9eb7 156 {
Azure.IoT Build 2:eef448cf9eb7 157 (void)printf("Failed on serializer_init\r\n");
Azure.IoT Build 2:eef448cf9eb7 158 }
Azure.IoT Build 2:eef448cf9eb7 159 else
Azure.IoT Build 2:eef448cf9eb7 160 {
Azure.IoT Build 2:eef448cf9eb7 161 IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle = IoTHubClient_LL_CreateFromConnectionString(connectionString, MQTT_Protocol);
Azure.IoT Build 2:eef448cf9eb7 162 srand((unsigned int)time(NULL));
Azure.IoT Build 2:eef448cf9eb7 163 int avgWindSpeed = 10;
AzureIoTClient 38:6661a95af557 164 float minTemperature = 20.0;
AzureIoTClient 38:6661a95af557 165 float minHumidity = 60.0;
Azure.IoT Build 2:eef448cf9eb7 166
Azure.IoT Build 2:eef448cf9eb7 167 if (iotHubClientHandle == NULL)
Azure.IoT Build 2:eef448cf9eb7 168 {
Azure.IoT Build 2:eef448cf9eb7 169 (void)printf("Failed on IoTHubClient_LL_Create\r\n");
Azure.IoT Build 2:eef448cf9eb7 170 }
Azure.IoT Build 2:eef448cf9eb7 171 else
Azure.IoT Build 2:eef448cf9eb7 172 {
AzureIoTClient 47:5a11f794a6ae 173 #ifdef SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 6:55659b146374 174 // For mbed add the certificate information
AzureIoTClient 6:55659b146374 175 if (IoTHubClient_LL_SetOption(iotHubClientHandle, "TrustedCerts", certificates) != IOTHUB_CLIENT_OK)
AzureIoTClient 6:55659b146374 176 {
AzureIoTClient 6:55659b146374 177 (void)printf("failure to set option \"TrustedCerts\"\r\n");
AzureIoTClient 6:55659b146374 178 }
AzureIoTClient 47:5a11f794a6ae 179 #endif // SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 6:55659b146374 180
Azure.IoT Build 2:eef448cf9eb7 181
Azure.IoT Build 2:eef448cf9eb7 182 ContosoAnemometer* myWeather = CREATE_MODEL_INSTANCE(WeatherStation, ContosoAnemometer);
Azure.IoT Build 2:eef448cf9eb7 183 if (myWeather == NULL)
Azure.IoT Build 2:eef448cf9eb7 184 {
Azure.IoT Build 2:eef448cf9eb7 185 (void)printf("Failed on CREATE_MODEL_INSTANCE\r\n");
Azure.IoT Build 2:eef448cf9eb7 186 }
Azure.IoT Build 2:eef448cf9eb7 187 else
Azure.IoT Build 2:eef448cf9eb7 188 {
Azure.IoT Build 2:eef448cf9eb7 189 if (IoTHubClient_LL_SetMessageCallback(iotHubClientHandle, IoTHubMessage, myWeather) != IOTHUB_CLIENT_OK)
Azure.IoT Build 2:eef448cf9eb7 190 {
Azure.IoT Build 2:eef448cf9eb7 191 printf("unable to IoTHubClient_SetMessageCallback\r\n");
Azure.IoT Build 2:eef448cf9eb7 192 }
Azure.IoT Build 2:eef448cf9eb7 193 else
Azure.IoT Build 2:eef448cf9eb7 194 {
Azure.IoT Build 2:eef448cf9eb7 195 myWeather->DeviceId = "myFirstDevice";
Azure.IoT Build 2:eef448cf9eb7 196 myWeather->WindSpeed = avgWindSpeed + (rand() % 4 + 2);
AzureIoTClient 38:6661a95af557 197 myWeather->Temperature = minTemperature + (rand() % 10);
AzureIoTClient 38:6661a95af557 198 myWeather->Humidity = minHumidity + (rand() % 20);
Azure.IoT Build 2:eef448cf9eb7 199 {
Azure.IoT Build 2:eef448cf9eb7 200 unsigned char* destination;
Azure.IoT Build 2:eef448cf9eb7 201 size_t destinationSize;
AzureIoTClient 38:6661a95af557 202 if (SERIALIZE(&destination, &destinationSize, myWeather->DeviceId, myWeather->WindSpeed, myWeather->Temperature, myWeather->Humidity) != CODEFIRST_OK)
Azure.IoT Build 2:eef448cf9eb7 203 {
Azure.IoT Build 2:eef448cf9eb7 204 (void)printf("Failed to serialize\r\n");
Azure.IoT Build 2:eef448cf9eb7 205 }
Azure.IoT Build 2:eef448cf9eb7 206 else
Azure.IoT Build 2:eef448cf9eb7 207 {
AzureIoTClient 38:6661a95af557 208 sendMessage(iotHubClientHandle, destination, destinationSize, myWeather);
Azure.IoT Build 2:eef448cf9eb7 209 free(destination);
Azure.IoT Build 2:eef448cf9eb7 210 }
Azure.IoT Build 2:eef448cf9eb7 211 }
Azure.IoT Build 2:eef448cf9eb7 212
Azure.IoT Build 2:eef448cf9eb7 213 /* wait for commands */
Azure.IoT Build 2:eef448cf9eb7 214 while (1)
Azure.IoT Build 2:eef448cf9eb7 215 {
Azure.IoT Build 2:eef448cf9eb7 216 IoTHubClient_LL_DoWork(iotHubClientHandle);
Azure.IoT Build 2:eef448cf9eb7 217 ThreadAPI_Sleep(100);
Azure.IoT Build 2:eef448cf9eb7 218 }
Azure.IoT Build 2:eef448cf9eb7 219 }
Azure.IoT Build 2:eef448cf9eb7 220
Azure.IoT Build 2:eef448cf9eb7 221 DESTROY_MODEL_INSTANCE(myWeather);
Azure.IoT Build 2:eef448cf9eb7 222 }
Azure.IoT Build 2:eef448cf9eb7 223 IoTHubClient_LL_Destroy(iotHubClientHandle);
Azure.IoT Build 2:eef448cf9eb7 224 }
Azure.IoT Build 2:eef448cf9eb7 225 serializer_deinit();
Azure.IoT Build 2:eef448cf9eb7 226 }
Azure.IoT Build 2:eef448cf9eb7 227 platform_deinit();
Azure.IoT Build 2:eef448cf9eb7 228 }
Azure.IoT Build 2:eef448cf9eb7 229 }