Arduino uno接收温湿度传感器数据发送到esp01s并上传至阿里云服务器

好的，这是一个关于Arduino Uno和ESP-01S模块的项目，主要用于接收DHT11温湿度传感器的数据并将其通过ESP-01S模块上传到阿里云服务器上。以下是具体的步骤：

1. 将DHT11温湿度传感器连接到Arduino Uno上，可以参考以下连接方式：

DHT11 VCC - Arduino 5V
DHT11 GND - Arduino GND
DHT11 DATA - Arduino Digital Pin 2

2. 下载并安装ESP8266库，这里我们使用的是ESP8266WiFi库和ESP8266HTTPClient库。打开Arduino IDE，选择菜单栏：Sketch -> Include Library -> Manage Libraries，搜索并安装这两个库。

3. 连接ESP-01S模块到Arduino Uno上，可以参考以下连接方式：

ESP-01S VCC - Arduino 3.3V
ESP-01S GND - Arduino GND
ESP-01S RX - Arduino Digital Pin 3
ESP-01S TX - Arduino Digital Pin 4

4. 在阿里云上创建一个IoT实例并添加一个设备，记录下设备的三元组（ProductKey、DeviceName、DeviceSecret）。

5. 在阿里云上创建一个Topic，用于接收设备上传的数据。

6. 编写Arduino代码，实现从DHT11传感器读取数据并将其上传到阿里云服务器上，可以参考以下代码：

#include <DHT.h>
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <PubSubClient.h>

#define DHTPIN 2
#define DHTTYPE DHT11

const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
const char* serverName = "your_SERVER_NAME";
const char* productKey = "your_PRODUCT_KEY";
const char* deviceName = "your_DEVICE_NAME";
const char* deviceSecret = "your_DEVICE_SECRET";
const char* mqttServer = productKey ".iot-as-mqtt.cn-shanghai.aliyuncs.com";
int mqttPort = 1883;
const char* mqttClientId = "clientId";
const char* mqttUsername = deviceName "&" productKey;
const char* mqttPassword = "your_MQTT_PASSWORD";
const char* mqttTopic = "/sys/" productKey "/" deviceName "/thing/event/property/post";

DHT dht(DHTPIN, DHTTYPE);
WiFiClient wifiClient;
PubSubClient mqttClient(wifiClient);

void setup() {
  Serial.begin(9600);
  dht.begin();
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");
  mqttClient.setServer(mqttServer, mqttPort);
}

void loop() {
  float temp = dht.readTemperature();
  float humidity = dht.readHumidity();
  if (isnan(temp) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }
  Serial.print("Temperature: ");
  Serial.print(temp);
  Serial.print("C, Humidity: ");
  Serial.print(humidity);
  Serial.println("%");
  
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    String serverPath = serverName + "/temperature=" + String(temp) + "&humidity=" + String(humidity);
    http.begin(serverPath.c_str());
    int httpCode = http.GET();
    if (httpCode > 0) {
      String payload = http.getString();
      Serial.println(payload);
    } else {
      Serial.println("Error on HTTP request");
    }
    http.end();
  }
  
  if (!mqttClient.connected()) {
    String clientId = mqttClientId;
    clientId += String(random(0xffff), HEX);
    Serial.print("Connecting to MQTT server ");
    Serial.print(mqttServer);
    Serial.println("...");
    if (mqttClient.connect(clientId.c_str(), mqttUsername, mqttPassword)) {
      Serial.println("Connected to MQTT server");
    } else {
      Serial.print("Failed to connect to MQTT server, rc=");
      Serial.println(mqttClient.state());
      delay(2000);
      return;
    }
  }

  String payload = "{\"id\":\"1\",\"params\":{\"Temperature\":" + String(temp) + ",\"Humidity\":" + String(humidity) + "},\"method\":\"thing.event.property.post\"}";
  mqttClient.publish(mqttTopic, payload.c_str());
  Serial.println("Published message");
  delay(5000);
}

在代码中，我们使用了MQTT协议将传感器数据上传到阿里云服务器上。需要注意的是，MQTT连接需要使用三元组中的DeviceName、ProductKey和DeviceSecret，以及阿里云IoT账号的AccessKey和SecretKey生成MQTT密码，可以在阿里云控制台中找到。

7. 将代码上传到Arduino Uno板子上。

到这里，你已经完成了将温湿度传感器数据发送到阿里云服务器的过程。如果你在阿里云IoT控制台中创建了一个Topic，则可以在控制台中查看设备上传的数据。