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+====== Arduino nodeMCU soros kommunikáció ======
+Az Arduino UNO egy DHT22 szenzort olvas, és írja át az adatokat a soros porton a nodeMCU-nak.
+**Arduino - nodeMCU pinek:**
+  * DHT22 input: pin 2
+  * Serial Tx: Pin 10 → nodeMCU Rx
+  * Serial Rx: Pin 11 → nodeMCU Tx
+=== Arduino Kód ===
+<code c>
+#include "DHT.h"
+#include "SoftwareSerial.h"
+#define DHTTYPE DHT22
+#define DHTPIN 2
+DHT dht(DHTPIN, DHTTYPE);
+SoftwareSerial Serial1(10, 11); // Rx, Tx
+int temp,humi;
+String str;
+void setup(){
+ Serial.begin(115200);
+ Serial1.begin(115200);
+ dht.begin();
+ delay(2000);
+}
+void loop()
+{
+  humi = dht.readHumidity()*100.0;
+  temp = dht.readTemperature()*100.0;
+  delay(200);
+  Serial.print("H: ");
+  Serial.print(humi);
+  Serial.print("% ");
+  Serial.print(" T: ");
+  Serial.print(temp);
+  Serial.println("C");
+  str =String('H')+String(humi)+String('T')+String(temp);
+  Serial1.println(str);
+  delay(5000);
+}
+</code>
+=== nodeMCU Kód ===
+<code c>
+void setup() {
+  // Open serial communications and wait for port to open:
+  Serial.begin(115200);
+  while (!Serial) {
+    ; // wait for serial port to connect. Needed for native USB port only
+  }
+}
+void loop() { // run over and over
+  if (Serial.available()) {
+    Serial.write(Serial.read());
+  }
+}
+</code>