arduino uno r3 使用MQTT协议上传数据至onenet格式
时间: 2023-09-18 21:13:45 浏览: 218
好的,针对您的问题,我可以给出如下回答:
Arduino Uno R3 可以使用 MQTT 协议将数据上传至 OneNet 平台。您需要通过连接设备和创建产品等操作,获取 OneNet 平台的设备 ID,产品 ID 和 API Key 等信息,然后在 Arduino 程序中设置好相关参数,使用 MQTT 库连接 OneNet 服务器,并将所需数据以 JSON 格式发送至服务器即可实现数据上传。具体操作可以参考 OneNet 提供的开发文档和示例代码。
相关问题
arduino uno采取mqtt协议连接云平台设备的代码
以下是arduino uno采取mqtt协议连接云平台设备的代码示例:
#include <PubSubClient.h>
#include <WiFi.h>
// 需要输入WiFi网络的SSID和密码
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
// 设备的ID和访问密钥,需要替换成自己的
const char* device_id = "your_DEVICE_ID";
const char* access_key = "your_ACCESS_KEY";
// 云平台MQTT服务器的IP地址和端口号,需要替换成自己的
const char* mqtt_server = "your_MQTT_SERVER_IP";
int mqtt_port = your_MQTT_SERVER_PORT;
// MQTT客户端
WiFiClient wifi_client;
PubSubClient mqtt_client(wifi_client);
void setup() {
// 初始化串口
Serial.begin(9600);
// 连接WiFi
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("WiFi connected");
// 连接MQTT
mqtt_client.setServer(mqtt_server, mqtt_port);
while (!mqtt_client.connected()) {
if (mqtt_client.connect(device_id, access_key, "")) {
Serial.println("MQTT connected");
} else {
Serial.print("MQTT connection failed, rc=");
Serial.println(mqtt_client.state());
delay(5000);
}
}
}
void loop() {
// 持续连接MQTT
if (!mqtt_client.connected()) {
mqtt_client.connect(device_id, access_key, "");
}
mqtt_client.loop();
// 发布消息到MQTT主题
mqtt_client.publish("your_MQTT_TOPIC", "Hello, world!");
delay(1000);
}
编写arduino uno采取mqtt协议连接云平台的代码
以下是一个基本的Arduino Uno使用MQTT协议连接到云平台的代码示例:
#include <WiFi.h>
#include <PubSubClient.h>
// WiFi网络凭证
const char* ssid = "your-ssid";
const char* password = "your-password";
// MQTT服务器IP和端口号
const char* mqtt_server = "your-mqtt-server-ip";
int mqtt_port = 1883;
// MQTT客户端实例化
WiFiClient espClient;
PubSubClient client(espClient);
void setup() {
Serial.begin(9600);
// 连接到WiFi网络
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi network");
// 连接MQTT服务器
client.setServer(mqtt_server, mqtt_port);
while (!client.connected()) {
Serial.println("Connecting to MQTT server ...");
if (client.connect("your-client-id")) {
Serial.println("Connected to MQTT server");
} else {
Serial.print("Failed to connect to MQTT server, rc=");
Serial.print(client.state());
Serial.println(" retrying in 5 seconds");
delay(5000);
}
}
// 订阅MQTT主题
client.subscribe("your-subscribe-topic");
}
void loop() {
// 在此添加任何需要执行的代码
// 检测MQTT连接,如果订阅主题有消息,则进行处理
if (!client.connected()) {
reconnect();
}
client.loop();
}
// 重新连接函数
void reconnect() {
// 循环尝试连接MQTT服务器,直到成功为止
while (!client.connected()) {
Serial.println("Attempting MQTT connection...");
// 尝试连接MQTT服务器
if (client.connect("your-client-id")) {
Serial.println("Connected to MQTT server");
// 订阅MQTT主题
client.subscribe("your-subscribe-topic");
} else {
Serial.print("Failed to connect to MQTT server, rc=");
Serial.print(client.state());
Serial.println(" retrying in 5 seconds");
delay(5000);
}
}
}
// 处理接收到的MQTT消息
void callback(char* topic, byte* payload, unsigned int length) {
Serial.print("Message received [");
Serial.print(topic);
Serial.print("]: ");
for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
}
Serial.println();
}
注意: 代码示例中的 “your-ssid”, “your-password”, “your-mqtt-server-ip”, “your-client-id” 和 “your-subscribe-topic” 都需要根据实际情况填写和替换。 示例如下:
const char* ssid = "MyWiFi";
const char* password = "MyWiFiPassword";
const char* mqtt_server = "192.168.0.10";
client.connect("Arduino1");
client.subscribe("sensor/temperature");