#define LED_PIN 2 // GPIO2
...
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, HIGH);

Serial.begin(9600);
Serial.println("Hello Sming! Let's do smart things.");

WifiStation.enable(true);
WifiStation.config("LOCAL-NETWORK", "123456789087"); // Put you SSID and Password here

#include <Libraries/DHT/DHT.h> // This is just popular Arduino library!

#define WORK_PIN 0 // GPIO0
DHT dht(WORK_PIN, DHT22);

void init()
{
	dht.begin();

	float h = dht.readHumidity();
	float t = dht.readTemperature();
}

HttpClient thingSpeak;
...
thingSpeak.downloadString("http://api.thingspeak.com/update?key=XXXXXXX&field1=" + String(sensorValue), onDataSent);

void onDataSent(HttpClient& client, bool successful)
{
	if (successful)
		Serial.println("Successful!");
	else
		Serial.println("Failed");
}

server.listen(80);
server.addPath("/", onIndex);
server.addPath("/hello", onHello);
server.setDefaultHandler(onFile);

Serial.println("=== WEB SERVER STARTED ===");
Serial.println(WifiStation.getIP());

...

void onIndex(HttpRequest &request, HttpResponse &response)
{
	TemplateFileStream *tmpl = new TemplateFileStream("index.html");
	auto &vars = tmpl->variables();
	vars["counter"] = String(counter);
	vars["IP"] = WifiStation.getIP().toString();
	vars["MAC"] = WifiStation.getMAC();
	response.sendTemplate(tmpl);
}

void onFile(HttpRequest &request, HttpResponse &response)
{
	String file = request.getPath();
	if (file[0] == '/')
		file = file.substring(1);
		
	response.setCache(86400, true);
	response.sendFile(file);
}