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@56:44c6b5aac6ff, 2018-03-20 (annotated)

Committer:
AzureIoTClient
Date:
Tue Mar 20 10:35:35 2018 -0700
Revision:
56:44c6b5aac6ff
Parent:
52:e7a6a18a9c0f
Child:
63:3bbdcd21171b
1.2.1

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 16:15f02cc1f940 14 #include "azure_c_shared_utility/threadapi.h"
Azure.IoT Build 16:15f02cc1f940 15 #include "azure_c_shared_utility/platform.h"
Azure.IoT Build 2:eef448cf9eb7 16 #include "serializer.h"
Azure.IoT Build 2:eef448cf9eb7 17 #include "iothub_client_ll.h"
Azure.IoT Build 2:eef448cf9eb7 18 #include "iothubtransportmqtt.h"
Azure.IoT.Build 26:3126b9d4187b 19
AzureIoTClient 6:55659b146374 20 #ifdef MBED_BUILD_TIMESTAMP
AzureIoTClient 47:5a11f794a6ae 21 #define SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 47:5a11f794a6ae 22 #endif // MBED_BUILD_TIMESTAMP
AzureIoTClient 47:5a11f794a6ae 23
AzureIoTClient 47:5a11f794a6ae 24 #ifdef SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 6:55659b146374 25 #include "certs.h"
AzureIoTClient 47:5a11f794a6ae 26 #endif // SET_TRUSTED_CERT_IN_SAMPLES
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),
AzureIoTClient 38:6661a95af557 39 WITH_DATA(float, Temperature),
AzureIoTClient 38:6661a95af557 40 WITH_DATA(float, Humidity),
Azure.IoT Build 2:eef448cf9eb7 41 WITH_ACTION(TurnFanOn),
Azure.IoT Build 2:eef448cf9eb7 42 WITH_ACTION(TurnFanOff),
Azure.IoT Build 2:eef448cf9eb7 43 WITH_ACTION(SetAirResistance, int, Position)
Azure.IoT Build 2:eef448cf9eb7 44 );
Azure.IoT Build 2:eef448cf9eb7 45
Azure.IoT Build 2:eef448cf9eb7 46 END_NAMESPACE(WeatherStation);
Azure.IoT Build 2:eef448cf9eb7 47
AzureIoTClient 38:6661a95af557 48 static char propText[1024];
Azure.IoT Build 2:eef448cf9eb7 49
Azure.IoT Build 2:eef448cf9eb7 50 EXECUTE_COMMAND_RESULT TurnFanOn(ContosoAnemometer* device)
Azure.IoT Build 2:eef448cf9eb7 51 {
Azure.IoT Build 2:eef448cf9eb7 52 (void)device;
Azure.IoT Build 2:eef448cf9eb7 53 (void)printf("Turning fan on.\r\n");
Azure.IoT Build 2:eef448cf9eb7 54 return EXECUTE_COMMAND_SUCCESS;
Azure.IoT Build 2:eef448cf9eb7 55 }
Azure.IoT Build 2:eef448cf9eb7 56
Azure.IoT Build 2:eef448cf9eb7 57 EXECUTE_COMMAND_RESULT TurnFanOff(ContosoAnemometer* device)
Azure.IoT Build 2:eef448cf9eb7 58 {
Azure.IoT Build 2:eef448cf9eb7 59 (void)device;
Azure.IoT Build 2:eef448cf9eb7 60 (void)printf("Turning fan off.\r\n");
Azure.IoT Build 2:eef448cf9eb7 61 return EXECUTE_COMMAND_SUCCESS;
Azure.IoT Build 2:eef448cf9eb7 62 }
Azure.IoT Build 2:eef448cf9eb7 63
Azure.IoT Build 2:eef448cf9eb7 64 EXECUTE_COMMAND_RESULT SetAirResistance(ContosoAnemometer* device, int Position)
Azure.IoT Build 2:eef448cf9eb7 65 {
Azure.IoT Build 2:eef448cf9eb7 66 (void)device;
Azure.IoT Build 2:eef448cf9eb7 67 (void)printf("Setting Air Resistance Position to %d.\r\n", Position);
Azure.IoT Build 2:eef448cf9eb7 68 return EXECUTE_COMMAND_SUCCESS;
Azure.IoT Build 2:eef448cf9eb7 69 }
Azure.IoT Build 2:eef448cf9eb7 70
Azure.IoT Build 2:eef448cf9eb7 71 void sendCallback(IOTHUB_CLIENT_CONFIRMATION_RESULT result, void* userContextCallback)
Azure.IoT Build 2:eef448cf9eb7 72 {
AzureIoTClient 17:a6f7340182f9 73 unsigned int messageTrackingId = (unsigned int)(uintptr_t)userContextCallback;
Azure.IoT Build 2:eef448cf9eb7 74
AzureIoTClient 17:a6f7340182f9 75 (void)printf("Message Id: %u Received.\r\n", messageTrackingId);
Azure.IoT Build 2:eef448cf9eb7 76
Azure.IoT Build 2:eef448cf9eb7 77 (void)printf("Result Call Back Called! Result is: %s \r\n", ENUM_TO_STRING(IOTHUB_CLIENT_CONFIRMATION_RESULT, result));
Azure.IoT Build 2:eef448cf9eb7 78 }
Azure.IoT Build 2:eef448cf9eb7 79
AzureIoTClient 38:6661a95af557 80 static void sendMessage(IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle, const unsigned char* buffer, size_t size, ContosoAnemometer *myWeather)
Azure.IoT Build 2:eef448cf9eb7 81 {
Azure.IoT Build 2:eef448cf9eb7 82 static unsigned int messageTrackingId;
Azure.IoT Build 2:eef448cf9eb7 83 IOTHUB_MESSAGE_HANDLE messageHandle = IoTHubMessage_CreateFromByteArray(buffer, size);
Azure.IoT Build 2:eef448cf9eb7 84 if (messageHandle == NULL)
Azure.IoT Build 2:eef448cf9eb7 85 {
Azure.IoT Build 2:eef448cf9eb7 86 printf("unable to create a new IoTHubMessage\r\n");
Azure.IoT Build 2:eef448cf9eb7 87 }
Azure.IoT Build 2:eef448cf9eb7 88 else
Azure.IoT Build 2:eef448cf9eb7 89 {
AzureIoTClient 38:6661a95af557 90 MAP_HANDLE propMap = IoTHubMessage_Properties(messageHandle);
AzureIoTClient 38:6661a95af557 91 (void)sprintf_s(propText, sizeof(propText), myWeather->Temperature > 28 ? "true" : "false");
AzureIoTClient 38:6661a95af557 92 if (Map_AddOrUpdate(propMap, "temperatureAlert", propText) != MAP_OK)
AzureIoTClient 38:6661a95af557 93 {
AzureIoTClient 38:6661a95af557 94 (void)printf("ERROR: Map_AddOrUpdate Failed!\r\n");
AzureIoTClient 38:6661a95af557 95 }
AzureIoTClient 38:6661a95af557 96
Azure.IoT Build 2:eef448cf9eb7 97 if (IoTHubClient_LL_SendEventAsync(iotHubClientHandle, messageHandle, sendCallback, (void*)(uintptr_t)messageTrackingId) != IOTHUB_CLIENT_OK)
Azure.IoT Build 2:eef448cf9eb7 98 {
Azure.IoT Build 2:eef448cf9eb7 99 printf("failed to hand over the message to IoTHubClient");
Azure.IoT Build 2:eef448cf9eb7 100 }
Azure.IoT Build 2:eef448cf9eb7 101 else
Azure.IoT Build 2:eef448cf9eb7 102 {
Azure.IoT Build 2:eef448cf9eb7 103 printf("IoTHubClient accepted the message for delivery\r\n");
Azure.IoT Build 2:eef448cf9eb7 104 }
Azure.IoT Build 2:eef448cf9eb7 105 IoTHubMessage_Destroy(messageHandle);
Azure.IoT Build 2:eef448cf9eb7 106 }
Azure.IoT Build 2:eef448cf9eb7 107 messageTrackingId++;
Azure.IoT Build 2:eef448cf9eb7 108 }
Azure.IoT Build 2:eef448cf9eb7 109
Azure.IoT Build 2:eef448cf9eb7 110 /*this function "links" IoTHub to the serialization library*/
Azure.IoT Build 2:eef448cf9eb7 111 static IOTHUBMESSAGE_DISPOSITION_RESULT IoTHubMessage(IOTHUB_MESSAGE_HANDLE message, void* userContextCallback)
Azure.IoT Build 2:eef448cf9eb7 112 {
Azure.IoT Build 2:eef448cf9eb7 113 const unsigned char* buffer;
Azure.IoT Build 2:eef448cf9eb7 114 size_t size;
Azure.IoT Build 2:eef448cf9eb7 115 if (IoTHubMessage_GetByteArray(message, &buffer, &size) != IOTHUB_MESSAGE_OK)
Azure.IoT Build 2:eef448cf9eb7 116 {
AzureIoTClient 51:90c6d50af45f 117 (void)printf("unable to IoTHubMessage_GetByteArray\r\n");
Azure.IoT Build 2:eef448cf9eb7 118 }
Azure.IoT Build 2:eef448cf9eb7 119 else
Azure.IoT Build 2:eef448cf9eb7 120 {
Azure.IoT Build 2:eef448cf9eb7 121 /*buffer is not zero terminated*/
Azure.IoT Build 2:eef448cf9eb7 122 char* temp = malloc(size + 1);
Azure.IoT Build 2:eef448cf9eb7 123 if (temp == NULL)
Azure.IoT Build 2:eef448cf9eb7 124 {
AzureIoTClient 51:90c6d50af45f 125 (void)printf("failed to malloc\r\n");
Azure.IoT Build 2:eef448cf9eb7 126 }
Azure.IoT Build 2:eef448cf9eb7 127 else
Azure.IoT Build 2:eef448cf9eb7 128 {
AzureIoTClient 30:7bb030702a93 129 (void)memcpy(temp, buffer, size);
Azure.IoT Build 2:eef448cf9eb7 130 temp[size] = '\0';
Azure.IoT Build 2:eef448cf9eb7 131 EXECUTE_COMMAND_RESULT executeCommandResult = EXECUTE_COMMAND(userContextCallback, temp);
AzureIoTClient 51:90c6d50af45f 132 if (executeCommandResult != EXECUTE_COMMAND_SUCCESS)
AzureIoTClient 51:90c6d50af45f 133 {
AzureIoTClient 51:90c6d50af45f 134 (void)printf("Execute command failed\r\n");
AzureIoTClient 51:90c6d50af45f 135 }
Azure.IoT Build 2:eef448cf9eb7 136 free(temp);
Azure.IoT Build 2:eef448cf9eb7 137 }
Azure.IoT Build 2:eef448cf9eb7 138 }
AzureIoTClient 51:90c6d50af45f 139 // MQTT can only accept messages
AzureIoTClient 51:90c6d50af45f 140 return IOTHUBMESSAGE_ACCEPTED;
Azure.IoT Build 2:eef448cf9eb7 141 }
Azure.IoT Build 2:eef448cf9eb7 142
Azure.IoT Build 2:eef448cf9eb7 143 void simplesample_mqtt_run(void)
Azure.IoT Build 2:eef448cf9eb7 144 {
Azure.IoT Build 2:eef448cf9eb7 145 if (platform_init() != 0)
Azure.IoT Build 2:eef448cf9eb7 146 {
Azure.IoT Build 2:eef448cf9eb7 147 (void)printf("Failed to initialize platform.\r\n");
Azure.IoT Build 2:eef448cf9eb7 148 }
Azure.IoT Build 2:eef448cf9eb7 149 else
Azure.IoT Build 2:eef448cf9eb7 150 {
Azure.IoT Build 2:eef448cf9eb7 151 if (serializer_init(NULL) != SERIALIZER_OK)
Azure.IoT Build 2:eef448cf9eb7 152 {
Azure.IoT Build 2:eef448cf9eb7 153 (void)printf("Failed on serializer_init\r\n");
Azure.IoT Build 2:eef448cf9eb7 154 }
Azure.IoT Build 2:eef448cf9eb7 155 else
Azure.IoT Build 2:eef448cf9eb7 156 {
Azure.IoT Build 2:eef448cf9eb7 157 IOTHUB_CLIENT_LL_HANDLE iotHubClientHandle = IoTHubClient_LL_CreateFromConnectionString(connectionString, MQTT_Protocol);
Azure.IoT Build 2:eef448cf9eb7 158 srand((unsigned int)time(NULL));
Azure.IoT Build 2:eef448cf9eb7 159 int avgWindSpeed = 10;
AzureIoTClient 38:6661a95af557 160 float minTemperature = 20.0;
AzureIoTClient 38:6661a95af557 161 float minHumidity = 60.0;
Azure.IoT Build 2:eef448cf9eb7 162
Azure.IoT Build 2:eef448cf9eb7 163 if (iotHubClientHandle == NULL)
Azure.IoT Build 2:eef448cf9eb7 164 {
Azure.IoT Build 2:eef448cf9eb7 165 (void)printf("Failed on IoTHubClient_LL_Create\r\n");
Azure.IoT Build 2:eef448cf9eb7 166 }
Azure.IoT Build 2:eef448cf9eb7 167 else
Azure.IoT Build 2:eef448cf9eb7 168 {
AzureIoTClient 47:5a11f794a6ae 169 #ifdef SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 6:55659b146374 170 // For mbed add the certificate information
AzureIoTClient 6:55659b146374 171 if (IoTHubClient_LL_SetOption(iotHubClientHandle, "TrustedCerts", certificates) != IOTHUB_CLIENT_OK)
AzureIoTClient 6:55659b146374 172 {
AzureIoTClient 6:55659b146374 173 (void)printf("failure to set option \"TrustedCerts\"\r\n");
AzureIoTClient 6:55659b146374 174 }
AzureIoTClient 47:5a11f794a6ae 175 #endif // SET_TRUSTED_CERT_IN_SAMPLES
AzureIoTClient 6:55659b146374 176
Azure.IoT Build 2:eef448cf9eb7 177
Azure.IoT Build 2:eef448cf9eb7 178 ContosoAnemometer* myWeather = CREATE_MODEL_INSTANCE(WeatherStation, ContosoAnemometer);
Azure.IoT Build 2:eef448cf9eb7 179 if (myWeather == NULL)
Azure.IoT Build 2:eef448cf9eb7 180 {
Azure.IoT Build 2:eef448cf9eb7 181 (void)printf("Failed on CREATE_MODEL_INSTANCE\r\n");
Azure.IoT Build 2:eef448cf9eb7 182 }
Azure.IoT Build 2:eef448cf9eb7 183 else
Azure.IoT Build 2:eef448cf9eb7 184 {
Azure.IoT Build 2:eef448cf9eb7 185 if (IoTHubClient_LL_SetMessageCallback(iotHubClientHandle, IoTHubMessage, myWeather) != IOTHUB_CLIENT_OK)
Azure.IoT Build 2:eef448cf9eb7 186 {
Azure.IoT Build 2:eef448cf9eb7 187 printf("unable to IoTHubClient_SetMessageCallback\r\n");
Azure.IoT Build 2:eef448cf9eb7 188 }
Azure.IoT Build 2:eef448cf9eb7 189 else
Azure.IoT Build 2:eef448cf9eb7 190 {
Azure.IoT Build 2:eef448cf9eb7 191 myWeather->DeviceId = "myFirstDevice";
Azure.IoT Build 2:eef448cf9eb7 192 myWeather->WindSpeed = avgWindSpeed + (rand() % 4 + 2);
AzureIoTClient 38:6661a95af557 193 myWeather->Temperature = minTemperature + (rand() % 10);
AzureIoTClient 38:6661a95af557 194 myWeather->Humidity = minHumidity + (rand() % 20);
Azure.IoT Build 2:eef448cf9eb7 195 {
Azure.IoT Build 2:eef448cf9eb7 196 unsigned char* destination;
Azure.IoT Build 2:eef448cf9eb7 197 size_t destinationSize;
AzureIoTClient 38:6661a95af557 198 if (SERIALIZE(&destination, &destinationSize, myWeather->DeviceId, myWeather->WindSpeed, myWeather->Temperature, myWeather->Humidity) != CODEFIRST_OK)
Azure.IoT Build 2:eef448cf9eb7 199 {
Azure.IoT Build 2:eef448cf9eb7 200 (void)printf("Failed to serialize\r\n");
Azure.IoT Build 2:eef448cf9eb7 201 }
Azure.IoT Build 2:eef448cf9eb7 202 else
Azure.IoT Build 2:eef448cf9eb7 203 {
AzureIoTClient 38:6661a95af557 204 sendMessage(iotHubClientHandle, destination, destinationSize, myWeather);
Azure.IoT Build 2:eef448cf9eb7 205 free(destination);
Azure.IoT Build 2:eef448cf9eb7 206 }
Azure.IoT Build 2:eef448cf9eb7 207 }
Azure.IoT Build 2:eef448cf9eb7 208
Azure.IoT Build 2:eef448cf9eb7 209 /* wait for commands */
Azure.IoT Build 2:eef448cf9eb7 210 while (1)
Azure.IoT Build 2:eef448cf9eb7 211 {
Azure.IoT Build 2:eef448cf9eb7 212 IoTHubClient_LL_DoWork(iotHubClientHandle);
Azure.IoT Build 2:eef448cf9eb7 213 ThreadAPI_Sleep(100);
Azure.IoT Build 2:eef448cf9eb7 214 }
Azure.IoT Build 2:eef448cf9eb7 215 }
Azure.IoT Build 2:eef448cf9eb7 216
Azure.IoT Build 2:eef448cf9eb7 217 DESTROY_MODEL_INSTANCE(myWeather);
Azure.IoT Build 2:eef448cf9eb7 218 }
Azure.IoT Build 2:eef448cf9eb7 219 IoTHubClient_LL_Destroy(iotHubClientHandle);
Azure.IoT Build 2:eef448cf9eb7 220 }
Azure.IoT Build 2:eef448cf9eb7 221 serializer_deinit();
Azure.IoT Build 2:eef448cf9eb7 222 }
Azure.IoT Build 2:eef448cf9eb7 223 platform_deinit();
Azure.IoT Build 2:eef448cf9eb7 224 }
Azure.IoT Build 2:eef448cf9eb7 225 }