int main(void)
{
IOTHUB_CLIENT_TRANSPORT_PROVIDER protocol = MQTT_Protocol;
IOTHUB_MESSAGE_HANDLE message_handle;
float telemetry_temperature;
float telemetry_humidity;
const char* telemetry_scale = "Celcius";
char telemetry_msg_buffer[80];
int messagecount = 0;
printf("\r\nThis sample will send messages continuously and accept C2D messages.\r\nPress Ctrl+C to terminate the sample.\r\n\r\n");
IOTHUB_DEVICE_CLIENT_HANDLE device_handle;
// Used to initialize IoTHub SDK subsystem
(void)IoTHub_Init();
(void)printf("Creating IoTHub handle\r\n");
// Create the iothub handle here
device_handle = IoTHubDeviceClient_CreateFromConnectionString(connectionString, protocol);
if (device_handle == NULL)
{
(void)printf("Failure creating Iothub device. Hint: Check you connection string.\r\n");
}
else
{
#ifdef SET_TRUSTED_CERT_IN_SAMPLES
// Setting the Trusted Certificate. This is only necessary on system with without
// built in certificate stores.
(void)IoTHubDeviceClient_SetOption(device_handle, OPTION_TRUSTED_CERT, certificates);
#endif // SET_TRUSTED_CERT_IN_SAMPLES
int i = MESSAGE_COUNT;
while(i--)
{
// Construct the iothub message
telemetry_temperature = 20.0f + ((float)rand() / RAND_MAX) * 15.0f;
telemetry_humidity = 60.0f + ((float)rand() / RAND_MAX) * 20.0f;
sprintf(telemetry_msg_buffer, "{\"temperature\":%.3f,\"humidity\":%.3f,\"scale\":\"%s\"}",
telemetry_temperature, telemetry_humidity, telemetry_scale);
message_handle = IoTHubMessage_CreateFromString(telemetry_msg_buffer);
(void)printf("\r\nSending message %d to IoTHub\r\nMessage: %s\r\n", (int)(messagecount + 1), telemetry_msg_buffer);
IoTHubDeviceClient_SendEventAsync(device_handle, message_handle, send_confirm_callback, NULL);
// The message is copied to the sdk so the we can destroy it
IoTHubMessage_Destroy(message_handle);
messagecount = messagecount + 1;
ThreadAPI_Sleep(g_interval);
}
// Clean up the iothub sdk handle
IoTHubDeviceClient_Destroy(device_handle);
}
// Free all the sdk subsystem
IoTHub_Deinit();
return 0;
}
int main(void)
{
TRANSPORT_HANDLE transport_handle;
IOTHUB_CLIENT_TRANSPORT_PROVIDER protocol;
IOTHUB_DEVICE_CLIENT_HANDLE device_handle1;
IOTHUB_DEVICE_CLIENT_HANDLE device_handle2;
#ifdef SAMPLE_AMQP
protocol = AMQP_Protocol;
#endif // SAMPLE_AMQP
#ifdef SAMPLE_AMQP_OVER_WEBSOCKETS
protocol = AMQP_Protocol_over_WebSocketsTls;
#endif // SAMPLE_AMQP_OVER_WEBSOCKETS
(void)printf("Starting the IoTHub client sample C2D methods on AMQP over WebSockets with multiplexing ...\r\n");
// Used to initialize IoTHub SDK subsystem
(void)IoTHub_Init();
if ((transport_handle = IoTHubTransport_Create(protocol, hubName, hubSuffix)) == NULL)
{
(void)printf("Failed to creating the protocol handle.\r\n");
}
else
{
IOTHUB_CLIENT_CONFIG client_config1;
client_config1.deviceId = deviceId1;
client_config1.deviceKey = deviceKey1;
client_config1.deviceSasToken = NULL;
client_config1.iotHubName = hubName;
client_config1.iotHubSuffix = hubSuffix;
client_config1.protocol = protocol;
client_config1.protocolGatewayHostName = NULL;
IOTHUB_CLIENT_CONFIG client_config2;
client_config2.deviceId = deviceId2;
client_config2.deviceKey = deviceKey2;
client_config2.deviceSasToken = NULL;
client_config2.iotHubName = hubName;
client_config2.iotHubSuffix = hubSuffix;
client_config2.protocol = protocol;
client_config2.protocolGatewayHostName = NULL;
if ((device_handle1 = IoTHubDeviceClient_CreateWithTransport(transport_handle, &client_config1)) == NULL)
{
(void)printf("ERROR: iotHubClientHandle1 is NULL!\r\n");
}
else if ((device_handle2 = IoTHubDeviceClient_CreateWithTransport(transport_handle, &client_config2)) == NULL)
{
(void)printf("ERROR: iotHubClientHandle1 is NULL!\r\n");
}
else
{
// Set any option that are neccessary.
// For available options please see the iothub_sdk_options.md documentation
//bool traceOn = true;
//IoTHubDeviceClient_SetOption(device_handle1, OPTION_LOG_TRACE, &traceOn);
//IoTHubDeviceClient_SetOption(device_handle2, OPTION_LOG_TRACE, &traceOn);
#ifdef SET_TRUSTED_CERT_IN_SAMPLES
// Setting the Trusted Certificate. This is only necessary on system without
// built in certificate stores.
IoTHubDeviceClient_SetOption(device_handle1, OPTION_TRUSTED_CERT, certificates);
IoTHubDeviceClient_SetOption(device_handle2, OPTION_TRUSTED_CERT, certificates);
#endif // SET_TRUSTED_CERT_IN_SAMPLES
/* Here subscribe for C2D methods */
if (IoTHubDeviceClient_SetDeviceMethodCallback(device_handle1, DeviceMethodCallback, (void*)deviceId1) != IOTHUB_CLIENT_OK)
{
(void)printf("ERROR: IoTHubClient_SetDeviceMethodCallback for the first device..........FAILED!\r\n");
}
else if (IoTHubDeviceClient_SetDeviceMethodCallback(device_handle2, DeviceMethodCallback, (void*)deviceId2) != IOTHUB_CLIENT_OK)
{
(void)printf("ERROR: IoTHubClient_SetDeviceMethodCallback for the second device..........FAILED!\r\n");
}
else
{
(void)printf("IoTHubClient_SetMessageCallback...successful.\r\n");
(void)printf("Waiting for C2D methods ...\r\n");
(void)printf("Press enter to close application\r\n");
(void)getchar();
}
// Clean up the iothub sdk handle
IoTHubDeviceClient_Destroy(device_handle1);
IoTHubDeviceClient_Destroy(device_handle2);
}
IoTHubTransport_Destroy(transport_handle);
// Free all the sdk subsystem
IoTHub_Deinit();
}
return 0;
}
int main(void)
{
IOTHUB_CLIENT_TRANSPORT_PROVIDER protocol;
IOTHUB_MESSAGE_HANDLE message_handle;
const char* telemetry_msg = "test_message";
char *cert_string = NULL;
printf("This sample will send %d messages and wait for any C2D messages.\r\nPress the enter key to end the sample\r\n\r\n", MESSAGE_COUNT);
// Select the Protocol to use with the connection
#ifdef SAMPLE_MQTT
protocol = MQTT_Protocol;
#endif // SAMPLE_MQTT
#ifdef SAMPLE_MQTT_OVER_WEBSOCKETS
protocol = MQTT_WebSocket_Protocol;
#endif // SAMPLE_MQTT_OVER_WEBSOCKETS
#ifdef SAMPLE_AMQP
protocol = AMQP_Protocol;
#endif // SAMPLE_AMQP
#ifdef SAMPLE_AMQP_OVER_WEBSOCKETS
protocol = AMQP_Protocol_over_WebSocketsTls;
#endif // SAMPLE_AMQP_OVER_WEBSOCKETS
#ifdef SAMPLE_HTTP
protocol = HTTP_Protocol;
#endif // SAMPLE_HTTP
IOTHUB_DEVICE_CLIENT_HANDLE device_handle;
// Used to initialize IoTHub SDK subsystem
(void)IoTHub_Init();
(void)printf("Creating IoTHub handle\r\n");
// Create the iothub handle here
device_handle = IoTHubDeviceClient_CreateFromConnectionString(connectionString, protocol);
if (device_handle == NULL)
{
(void)printf("Failure creating device client handle. Hint: Check you connection string.\r\n");
}
else
{
// Setting message callback to get C2D messages
(void)IoTHubDeviceClient_SetMessageCallback(device_handle, receive_msg_callback, NULL);
// Setting connection status callback to get indication of connection to iothub
(void)IoTHubDeviceClient_SetConnectionStatusCallback(device_handle, connection_status_callback, NULL);
// Set any option that are necessary.
// For available options please see the iothub_sdk_options.md documentation
// Turn tracing on/off
// bool traceOn = true;
// (void)IoTHubDeviceClient_SetOption(device_handle, OPTION_LOG_TRACE, &traceOn);
// Provide the Azure IoT device client with the Edge root
// X509 CA certificate that was used to setup the Edge runtime
cert_string = obtain_edge_ca_certificate();
(void)IoTHubDeviceClient_SetOption(device_handle, OPTION_TRUSTED_CERT, cert_string);
#if defined SAMPLE_MQTT || defined SAMPLE_MQTT_OVER_WEBSOCKETS
//Setting the auto URL Encoder (recommended for MQTT). Please use this option unless
//you are URL Encoding inputs yourself.
//ONLY valid for use with MQTT
//bool urlEncodeOn = true;
//(void)IoTHubDeviceClient_SetOption(device_handle, OPTION_AUTO_URL_ENCODE_DECODE, &urlEncodeOn);
#endif
for (size_t index = 0; index < MESSAGE_COUNT; index++)
{
// Construct the iothub message from a string
message_handle = IoTHubMessage_CreateFromString(telemetry_msg);
// Set Message property
(void)IoTHubMessage_SetMessageId(message_handle, "MSG_ID");
(void)IoTHubMessage_SetCorrelationId(message_handle, "CORE_ID");
(void)IoTHubMessage_SetContentTypeSystemProperty(message_handle, "application%2fjson");
(void)IoTHubMessage_SetContentEncodingSystemProperty(message_handle, "utf-8");
// Add custom properties to message
(void)IoTHubMessage_SetProperty(message_handle, "property_key", "property_value");
(void)printf("Sending message %d to Edge Hub\r\n", (int)(index + 1));
IoTHubDeviceClient_SendEventAsync(device_handle, message_handle, send_confirm_callback, NULL);
// The message is copied to the sdk so the we can destroy it
IoTHubMessage_Destroy(message_handle);
}
printf("\r\nPress any key to continue\r\n");
(void)getchar();
// Clean up the iothub sdk handle
IoTHubDeviceClient_Destroy(device_handle);
if (cert_string != NULL)
{
free(cert_string);
cert_string = NULL;
}
}
// Free all the sdk subsystem
IoTHub_Deinit();
return 0;
}
