Question

我现在正在使用esp32在IOT上做一个项目，我正在使用Adafruit IO作为我的MQTT Web服务器，但是当我在硬件中上传代码时，它将不接受该代码，并且将显示一条错误消息“编译错误。 ESP32开发板。”在互联网上找到我

#include <WiFi.h> 
#include "Adafruit_MQTT.h"
#include "Adafruit_MQTT_Client.h"
#define WLAN_SSID       "Ashish"
#define WLAN_PASS       "12345678"
#define AIO_SERVER      "io.adafruit.com"
#define AIO_SERVERPORT  1883                  
#define AIO_USERNAME    "khandelwalashish129"
#define AIO_KEY         "350c30c9c8864eabb26458c547axxxxx"

int output=2;
// Create an ESP8266 WiFiClient class to connect to the MQTT server.
WiFiClient client;
Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);        // Setup the MQTT client class by passing in the WiFi client and MQTT server and login details.

Adafruit_MQTT_Subscribe Light_Control = Adafruit_MQTT_Subscribe(&mqtt, AIO_USERNAME "/feeds/Light_Control");

void MQTT_connect();

void setup() {
  Serial.begin(115200);
  delay(10);

  pinMode(2,OUTPUT);

  // Connect to WiFi access point.
  Serial.println(); Serial.println();
  Serial.print("Connecting to ");
  Serial.println(WLAN_SSID);
  WiFi.begin(WLAN_SSID, WLAN_PASS);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println();
  Serial.println("WiFi connected");
  Serial.println("IP address: "); Serial.println(WiFi.localIP()); 
  mqtt.subscribe(&Light_Control);

}

uint32_t x=0;

void loop() { 
  MQTT_connect();
  Adafruit_MQTT_Subscribe *subscription;
  while ((subscription = mqtt.readSubscription(5000))) {
    if (subscription == &Light_Control) {
      Serial.print(F("Got: "));
      Serial.println((char *)Light_Control.lastread);
      if (!strcmp((char*) Light_Control.lastread, "ON"))
      {
        //Active low logic
        digitalWrite(2, HIGH);
      }
      else
      {
        digitalWrite(2, LOW);
      }
    }
  }
}

void MQTT_connect() {
  int8_t ret;
  // Stop if already connected.
  if (mqtt.connected()) {
    return;
  }

  Serial.print("Connecting to MQTT... ");
  uint8_t retries = 3;
  while ((ret = mqtt.connect()) != 0) { // connect will return 0 for connected
       Serial.println(mqtt.connectErrorString(ret));
       Serial.println("Retrying MQTT connection in 5 seconds...");
       mqtt.disconnect();
       delay(5000);  // wait 5 seconds
       retries--;
       if (retries == 0) {
         // basically die and wait for WDT to reset me
         while (1);
       }
  }

  Serial.println("MQTT Connected!");
}

Multiple libraries were found for "WiFi.h"  Used: E:\lema lab's\IOT\arduino-1.8.2\portable\packages\esp32\hardware\esp32\1.0.2\libraries\WiFi
Not used: E:\lema lab's\IOT\arduino-1.8.2\libraries\WiFi

Multiple libraries were found for "Adafruit_MQTT.h"  Used: E:\lema lab's\IOT\arduino-1.8.2\libraries\Adafruit_MQTT  Not used: E:\lema
lab's\IOT\arduino-1.8.2\portable\sketchbook\libraries\Adafruit_MQTT_Library
exit status 1 Error compiling for board ESP32 Dev Module.

This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

如何将ESP32与Adafruit IO连接？

0 个答案: