add 02 variant A

02a_serialBT_DTH11/02a_serialBT_DTH11.ino

@@ -0,0 +1,47 @@
+#include "BluetoothSerial.h"
+#include <DHT11.h>
+
+String device_name = "ESP32-DHT-Skrabanek";
+
+BluetoothSerial SerialBT;
+DHT11 dht11(5);
+
+void setup() {
+  Serial.begin(115200);
+
+  SerialBT.begin(device_name);
+  //SerialBT.deleteAllBondedDevices();
+  Serial.printf("Zarizeni \"%s\" je zapnuto. \n Bluetooth se brzy zobrazí",device_name.c_str());
+
+}
+
+void loop() {
+
+  if (SerialBT.available()) {
+    String command = SerialBT.readStringUntil('\n');
+    command.trim();
+
+    if(command.equalsIgnoreCase("ok")) {
+
+      int teplota = 0;
+      int vlhkost = 0;
+
+      int result = dht11.readTemperatureHumidity(teplota, vlhkost);
+
+      String senzorData;
+      if (result == 0) {
+        senzorData = "Teplota: " + String(teplota) + "°C, Vlhkost: " + String(vlhkost) + "%";
+      } else {
+        senzorData = "Chyba pri cteni DHT11: " + String(DHT11::getErrorString(result));
+      }
+
+    Serial.println(senzorData);
+    SerialBT.println(senzorData);
+    }else {
+    SerialBT.println("Neznamy prikaz. napis ok pro ziskani dat");
+  }
+    
+  } 
+  
+  delay(2000);
+}