Async_DHT11ESP32.ino

/****************************************************************************************************************************
  Async_DHT11ESP32.ino
  For ESP32 boards

  Blynk_Async_WM is a library, using AsyncWebServer instead of (ESP8266)WebServer for the ESP8266/ESP32 to enable easy
  configuration/reconfiguration and autoconnect/autoreconnect of WiFi/Blynk.
  
  Based on and modified from Blynk library v0.6.1 (https://github.com/blynkkk/blynk-library/releases)
  Built by Khoi Hoang (https://github.com/khoih-prog/Blynk_Async_WM)
  Licensed under MIT license
 ********************************************************************************************************************************/

#include "defines.h"

#include <Ticker.h>
#include <DHT.h>        // https://github.com/adafruit/DHT-sensor-library

DHT dht(DHT_PIN, DHT_TYPE);
BlynkTimer timer;
Ticker     led_ticker;

void readAndSendData()
{
  float temperature = dht.readTemperature();
  float humidity    = dht.readHumidity();

  if (!isnan(temperature) && !isnan(humidity))
  {
    Blynk.virtualWrite(V17, String(temperature, 1));
    Blynk.virtualWrite(V18, String(humidity, 1));
  }
  else
  {
    Blynk.virtualWrite(V17, "NAN");
    Blynk.virtualWrite(V18, "NAN");
  }
}

void set_led(byte status)
{
  digitalWrite(LED_BUILTIN, status);
}

void heartBeatPrint()
{
  static int num = 1;

  if (Blynk.connected())
  {
    set_led(HIGH);
    led_ticker.once_ms(111, set_led, (byte) LOW);
    Serial.print(F("B"));
  }
  else
  {
    Serial.print(F("F"));
  }

  if (num == 80)
  {
    Serial.println();
    num = 1;
  }
  else if (num++ % 10 == 0)
  {
    Serial.print(F(" "));
  }
}

void check_status()
{
  static unsigned long checkstatus_timeout = 0;

#define STATUS_CHECK_INTERVAL     60000L

  // Send status report every STATUS_REPORT_INTERVAL (60) 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
    heartBeatPrint();

    checkstatus_timeout = millis() + STATUS_CHECK_INTERVAL;
  }
}

#if USING_CUSTOMS_STYLE
const char NewCustomsStyle[] /*PROGMEM*/ = "<style>div,input{padding:5px;font-size:1em;}input{width:95%;}body{text-align: center;}\
button{background-color:blue;color:white;line-height:2.4rem;font-size:1.2rem;width:100%;}fieldset{border-radius:0.3rem;margin:0px;}</style>";
#endif

void setup()
{
  pinMode(LED_BUILTIN, OUTPUT);
  
  Serial.begin(115200);
  while (!Serial);

  delay(200);

#if ( USE_LITTLEFS || USE_SPIFFS)
  Serial.print(F("\nStarting Async_DHT11ESP32 using "));
  Serial.print(CurrentFileFS);
#else
  Serial.print(F("\nStarting Async_DHT11ESP32 using EEPROM"));
#endif

#if USE_SSL
  Serial.print(F(" with SSL on ")); Serial.println(ARDUINO_BOARD);
#else
  Serial.print(F(" without SSL on ")); Serial.println(ARDUINO_BOARD);
#endif  

#if USE_BLYNK_WM
  Serial.println(BLYNK_ASYNC_WM_VERSION);
  Serial.println(ESP_DOUBLE_RESET_DETECTOR_VERSION);
#endif

  dht.begin();

#if USE_BLYNK_WM

  // From v1.0.5
  // Set config portal SSID and Password
  Blynk.setConfigPortal("TestPortal", "TestPortalPass");
  // Set config portal IP address
  Blynk.setConfigPortalIP(IPAddress(192, 168, 200, 1));
  // Set config portal channel, defalut = 1. Use 0 => random channel from 1-13
  Blynk.setConfigPortalChannel(0);

  // From v1.0.5, select either one of these to set static IP + DNS
  Blynk.setSTAStaticIPConfig(IPAddress(192, 168, 2, 220), IPAddress(192, 168, 2, 1), IPAddress(255, 255, 255, 0));
  //Blynk.setSTAStaticIPConfig(IPAddress(192, 168, 2, 220), IPAddress(192, 168, 2, 1), IPAddress(255, 255, 255, 0),
  //                           IPAddress(192, 168, 2, 1), IPAddress(8, 8, 8, 8));
  //Blynk.setSTAStaticIPConfig(IPAddress(192, 168, 2, 220), IPAddress(192, 168, 2, 1), IPAddress(255, 255, 255, 0),
  //                           IPAddress(4, 4, 4, 4), IPAddress(8, 8, 8, 8));

//////////////////////////////////////////////
  
#if USING_CUSTOMS_STYLE
  Blynk.setCustomsStyle(NewCustomsStyle);
#endif

#if USING_CUSTOMS_HEAD_ELEMENT
  Blynk.setCustomsHeadElement("<style>html{filter: invert(10%);}</style>");
#endif

#if USING_CORS_FEATURE  
  Blynk.setCORSHeader("Your Access-Control-Allow-Origin");
#endif

  //////////////////////////////////////////////
  
  // Use this to default DHCP hostname to ESP8266-XXXXXX or ESP32-XXXXXX
  //Blynk.begin();
  // Use this to personalize DHCP hostname (RFC952 conformed)
  // 24 chars max,- only a..z A..Z 0..9 '-' and no '-' as last char
  //Blynk.begin("DHT11_ESP32");
  Blynk.begin(HOST_NAME);
#else
  WiFi.begin(ssid, pass);

#if USE_LOCAL_SERVER
  Blynk.config(auth, blynk_server, BLYNK_HARDWARE_PORT);
#else
  Blynk.config(auth);
#endif

  Blynk.connect();
#endif

  timer.setInterval(60 * 1000, readAndSendData);

  if (Blynk.connected())
  {
#if ( USE_LITTLEFS || USE_SPIFFS)
    Serial.print(F("\nBlynk ESP32 using "));
    Serial.print(CurrentFileFS);
    Serial.println(F(" connected."));
#else
    Serial.println(F("\nBlynk ESP32 using EEPROM connected."));
    Serial.printf("EEPROM size = %d bytes, EEPROM start address = %d / 0x%X\n", EEPROM_SIZE, EEPROM_START, EEPROM_START);
#endif

#if USE_BLYNK_WM
    Serial.print(F("Board Name : ")); Serial.println(Blynk.getBoardName());
#endif    
  }
}

#if (USE_BLYNK_WM && USE_DYNAMIC_PARAMETERS)
void displayCredentials()
{
  Serial.println(F("\nYour stored Credentials :"));

  for (uint16_t i = 0; i < NUM_MENU_ITEMS; i++)
  {
    Serial.print(myMenuItems[i].displayName);
    Serial.print(F(" = "));
    Serial.println(myMenuItems[i].pdata);
  }
}

void displayCredentialsInLoop()
{
  static bool displayedCredentials = false;

  if (!displayedCredentials)
  {
    for (uint16_t i = 0; i < NUM_MENU_ITEMS; i++)
    {
      if (!strlen(myMenuItems[i].pdata))
      {
        break;
      }

      if ( i == (NUM_MENU_ITEMS - 1) )
      {
        displayedCredentials = true;
        displayCredentials();
      }
    }
  }
}

#endif

void loop()
{
  Blynk.run();
  timer.run();
  check_status();

#if (USE_BLYNK_WM && USE_DYNAMIC_PARAMETERS)
  displayCredentialsInLoop();
#endif
}