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Author: khoih-prog

examples/DHT11ESP8266_Debug/DHT11ESP8266_Debug.ino

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+#define BLYNK_PRINT Serial
+
+#include <BlynkSimpleEsp8266_WM.h>
+#include <Ticker.h>
+#include <DHT.h>
+
+#define DHT_PIN     2
+#define DHT_TYPE    DHT11
+
+#define DHT_DEBUG   1
+
+DHT dht(DHT_PIN, DHT_TYPE);
+BlynkTimer timer;
+Ticker     aux_ticker;
+
+void readAndSendData() 
+{
+    float temperature = dht.readTemperature();
+    float humidity    = dht.readHumidity();
+    
+
+    if (!isnan(temperature) && !isnan(humidity)) 
+    {
+      Blynk.virtualWrite(V17, temperature);
+      Blynk.virtualWrite(V18, humidity);
+    }
+    else
+    {
+      Blynk.virtualWrite(V17, -100);
+      Blynk.virtualWrite(V18, -100);
+    }
+}
+
+#define PIN_LED   2 // Pin D4 mapped to pin GPIO2/TXD1 of ESP8266, NodeMCU and WeMoS, control on-board LED
+
+void set_led(byte status)
+{
+  digitalWrite(PIN_LED  /*LED_BUILTIN*/, status);
+ }
+
+void check_status()
+{
+  static unsigned long checkstatus_timeout = 0;
+
+#define STATUS_CHECK_INTERVAL     15000L
+
+  // Send status report every STATUS_REPORT_INTERVAL (10) seconds: we don't need to send updates frequently if there is no status change.
+  if ((millis() > checkstatus_timeout) || (checkstatus_timeout == 0))
+  {
+    // report status to Blynk
+    if (Blynk.connected())
+    {
+      set_led(LOW);
+      aux_ticker.once_ms(111, set_led, (byte) HIGH);
+
+      Serial.println("B");
+    }
+    else
+    {
+      Serial.println("F");
+    }
+
+    checkstatus_timeout = millis() + STATUS_CHECK_INTERVAL;
+  }
+}
+
+void setup() 
+{
+    // Debug console
+    Serial.begin(115200);
+    dht.begin();
+    Blynk.begin();
+    timer.setInterval(60 * 1000, readAndSendData);
+
+    if (Blynk.connected())
+    {
+       Serial.println("Blynk connected. Board Name : " + Blynk.getBoardName());
+    }
+}
+
+void loop() 
+{
+    Blynk.run();
+    timer.run();
+    check_status();
+}