Component Example Project

This is a network component example project that demonstrates how to use various network components and protocol stacks in the SDK.

Features

TCP/IP network communication
MQTT message transmission
HTTP client
Network configuration management

Quick Start

Hardware Requirements

One development board
Ethernet connection
Wi-Fi module (optional)
Network debugging tools

Build Steps

Configure network parameters
Set the server address
Compile the project
Download and run

Running Result

The program will connect to the network, establish various network connections, and perform data transmission tests.

Code Structure

component_example/
├── src/
│   ├── main.c              # Main program
│   ├── tcp_client.c        # TCP client
│   ├── mqtt_client.c       # MQTT client
│   ├── http_client.c       # HTTP client
│   └── network_config.c    # Network configuration
├── inc/
│   ├── tcp_client.h
│   ├── mqtt_client.h
│   ├── http_client.h
│   └── network_config.h
└── README.md

Network Components

TCP Client

// Create a TCP connection
tcp_connect("192.168.1.100", 8080);

// Send data
tcp_send("Hello Server\n");

// Receive data
char buffer[1024];
int len = tcp_receive(buffer, sizeof(buffer));

MQTT Client

// Connect to MQTT server
mqtt_connect("mqtt.example.com", 1883);

// Subscribe to a topic
mqtt_subscribe("sensor/data");

// Publish a message
mqtt_publish("device/status", "online");

// Receive messages
void mqtt_message_callback(const char* topic, const char* message) {
    printf("Message received: %s -> %s\n", topic, message);
}

HTTP Client

// Send GET request
http_get("http://api.example.com/data");

// Send POST request
http_post("http://api.example.com/upload", "{\"data\":\"value\"}");

// Handle response
void http_response_callback(int status, const char* body) {
    printf("HTTP Status: %d\n", status);
    printf("Response Body: %s\n", body);
}

Network Configuration

// Configure IP address
network_set_ip("192.168.1.100");

// Configure gateway
network_set_gateway("192.168.1.1");

// Configure DNS
network_set_dns("8.8.8.8");

// Start network
network_start();

Network Protocols

Supported Protocols

TCP/UDP – Transport layer protocols
HTTP/HTTPS – Application layer protocols
MQTT – Message queue protocol
CoAP – Constrained Application Protocol
WebSocket – Real-time communication protocol

Security Features

TLS/SSL encryption
Certificate validation
Authentication
Data integrity

Notes

Ensure the network connection is stable
Check the server address and port
Verify network configuration parameters
Monitor network status indicators

Troubleshooting

Common network issues and solutions:

Unable to connect to the network – Check IP configuration and gateway
TCP connection failed – Verify server address and port
MQTT connection timeout – Check network latency and firewall
HTTP request failed – Validate URL format and server status