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// Configured for Wemos D1 r1 (original Wemos D1 Board)

#define BLYNK_PRINT Serial

#define RED   "#FF0000"
#define GREEN "#00FF00"
#define BLUE  "#0000FF"

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <BME280I2C.h>
#include <Wire.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "your-auth-token-here";

char ssid[] = "your-wifi-ssid here";
char pass[] = "your-wifi-password-here";

int resetLimits = 0; // flag to say if limits need to be reset

BME280I2C bme;    // Default : forced mode, standby time = 1000 ms
                              // Oversampling = pressure ×1, temperature ×1, humidity ×1, filter off,

BME280::TempUnit tempUnit(BME280::TempUnit_Celsius);
BME280::PresUnit presUnit(BME280::PresUnit_hPa);

BlynkTimer timer;
WidgetLED led(V10);

float t, tmin, tmax, h, hmin, hmax, p;

BLYNK_WRITE(V0) {  resetLimits = 1;        } // Button to reset limits
BLYNK_WRITE(V1) {  hmin = param.asFloat(); } // For data coming from server
BLYNK_WRITE(V2) {  hmax = param.asFloat(); }
BLYNK_WRITE(V3) {  tmin = param.asFloat(); }
BLYNK_WRITE(V4) {  tmax = param.asFloat(); }

void sendSensor()
{
  bme.read(p, t, h, tempUnit, presUnit);
  
  if (isnan(p) || isnan(t) || isnan(h)) {
    Serial.println("Failed to read from  sensor!");
    led.setColor(RED);
    return;
  }
  
  led.setColor(GREEN);
  
  Blynk.virtualWrite(V5, h);
  Blynk.virtualWrite(V6, t);
  Blynk.virtualWrite(V9, p); 

  if(h<hmin || isnan(hmin) || resetLimits == 1) { hmin=h; Blynk.virtualWrite(V1, h); }
  if(h>hmax || isnan(hmax) || resetLimits == 1) { hmax=h; Blynk.virtualWrite(V2, h); }
  if(t<tmin || isnan(tmin) || resetLimits == 1) { tmin=t; Blynk.virtualWrite(V3, t); }
  if(t>tmax || isnan(tmax) || resetLimits == 1) { tmax=t; Blynk.virtualWrite(V4, t); }

  resetLimits = 0; // clear any request to reset limits
}

void setup()
{
  // Debug console
  Serial.begin(115200);

  Serial.println("Restarted");

  Blynk.begin(auth, ssid, pass);

  led.on();
  led.setColor(BLUE);

  Wire.begin(D4, D3);                          //  sda = 4 = D2, scl= 5 = D1
  while(!bme.begin())
  {
    Serial.println("Could not find BME280 sensor!");
    delay(1000);
  }
  switch(bme.chipModel())
  {
     case BME280::ChipModel_BME280:
       Serial.println("Found BME280 sensor! Success.");
       led.setColor(GREEN);
       break;
     case BME280::ChipModel_BMP280:
       Serial.println("Found BMP280 sensor! No Humidity available.");
       break;
     default:
       Serial.println("Found UNKNOWN sensor! Error!");
       led.setColor(RED);
  }

  Blynk.syncVirtual(V1,V2,V3,V4);            // Get old limits from server
  
  timer.setInterval(10L * 1000L, sendSensor); // Set timer to send data every 10 s
}

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