Java开发教程：实现物联网硬件的环境监测功能

#include <DHT.h>

#define DHT_PIN 2
#define DHT_TYPE DHT22

DHT dht(DHT_PIN, DHT_TYPE);

void setup() {
  Serial.begin(9600);
  dht.begin();
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();
  int lightIntensity = analogRead(A0);

  Serial.print("Temperature: ");
  Serial.println(temperature);
  
  Serial.print("Humidity: ");
  Serial.println(humidity);
  
  Serial.print("Light Intensity: ");
  Serial.println(lightIntensity);
  
  delay(5000);
}

import com.fazecast.jSerialComm.*;

public class ArduinoDataMonitor {
    public static void main(String[] args) {
        SerialPort port = SerialPort.getCommPort("/dev/tty.usbmodem14201"); // 替换为你的串口号
        port.setBaudRate(9600);

        if (port.openPort()) {
            System.out.println("端口已打开.");

            while (true) {
                byte[] buffer = new byte[100];
                int bytesRead = port.readBytes(buffer, buffer.length);

                String arduinoData = new String(buffer, 0, bytesRead);
                System.out.println(arduinoData);
                
                // 在这里添加数据处理和上传到云端的代码
                
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        } else {
            System.out.println("无法打开串口.");
        }
    }
}

import com.fazecast.jSerialComm.*;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.HttpClientBuilder;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class ArduinoDataMonitor {
    private static final String POST_URL = "http://example.com/data"; // 替换为你的API地址

    public static void main(String[] args) {
        // 代码省略...        

        HttpClient httpClient = HttpClientBuilder.create().build();
        HttpPost httpPost = new HttpPost(POST_URL);

        Map<String, String> data = new HashMap<>();
        data.put("temperature", temperature);
        data.put("humidity", humidity);
        data.put("lightIntensity", lightIntensity);

        ObjectMapper objectMapper = new ObjectMapper();
        String dataJson;
        try {
            dataJson = objectMapper.writeValueAsString(data);
            StringEntity entity = new StringEntity(dataJson);
            httpPost.setEntity(entity);
            httpPost.setHeader("Accept", "application/json");
            httpPost.setHeader("Content-type", "application/json");

            HttpResponse response = httpClient.execute(httpPost);
            HttpEntity responseEntity = response.getEntity();
            // 处理服务器响应

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}