installed libraries and changed code to ESP32

-> working

platformio.ini

@@ -12,3 +12,9 @@
 platform = espressif32
 board = esp32doit-devkit-v1
 framework = arduino
+lib_deps = 
+	khoih-prog/ESP_WiFiManager@^1.1.2
+	monstrenyatko/ArduinoMqtt@^1.5.1
+	beegee-tokyo/DHT sensor library for ESPx@^1.17
+	bblanchon/ArduinoJson@^6.16.1
+	knolleary/PubSubClient@^2.8

src/OutsideTempSensor.cpp

@@ -19,7 +19,7 @@
 */
 
 #include <Arduino.h>
-#include <ESP8266WiFi.h>
+#include <WiFi.h>
 #include <PubSubClient.h>
 #include <ArduinoJson.h>
 #include "DHTesp.h"
@@ -68,7 +68,7 @@ void reconnect() {
   while (!client.connected()) {
     Serial.print("Attempting MQTT connection...");
     // Create a random client ID
-    String clientId = "ESP8266Client-";
+    String clientId = "ESP32Client-";
     clientId += String(random(0xffff), HEX);
     // Attempt to connect
     if (client.connect(clientId.c_str())) {

src/wrkspc.code-workspace

@@ -0,0 +1,9 @@
+{
+	"folders": [
+		{
+			"name": "TempMQTT",
+			"path": ".."
+		}
+	],
+	"settings": {}
+}