帮我写一个esp32连接阿里云的代码
时间: 2023-04-10 09:05:12 浏览: 68
当然可以,以下是一个简单的示例代码:
#include <WiFi.h>
#include <PubSubClient.h>
const char* ssid = "your_SSID";
const char* password = "your_PASSWORD";
const char* mqttServer = "your_MQTT_SERVER";
const int mqttPort = 1883;
const char* mqttUser = "your_MQTT_USER";
const char* mqttPassword = "your_MQTT_PASSWORD";
WiFiClient espClient;
PubSubClient client(espClient);
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
client.setServer(mqttServer, mqttPort);
client.setCallback(callback);
while (!client.connected()) {
Serial.println("Connecting to MQTT...");
if (client.connect("ESP32Client", mqttUser, mqttPassword )) {
Serial.println("Connected to MQTT");
} else {
Serial.print("Failed with state ");
Serial.print(client.state());
delay(2000);
}
}
client.subscribe("test");
}
void loop() {
if (!client.connected()) {
reconnect();
}
client.loop();
}
void callback(char* topic, byte* payload, unsigned int length) {
Serial.print("Message arrived [");
Serial.print(topic);
Serial.print("] ");
for (int i = 0; i < length; i++) {
Serial.print((char)payload[i]);
}
Serial.println();
}
void reconnect() {
while (!client.connected()) {
Serial.println("Connecting to MQTT...");
if (client.connect("ESP32Client", mqttUser, mqttPassword )) {
Serial.println("Connected to MQTT");
client.subscribe("test");
} else {
Serial.print("Failed with state ");
Serial.print(client.state());
delay(2000);
}
}
}
请注意,这只是一个简单的示例代码,您需要根据您的具体情况进行修改。
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