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Wemos D1 mini + Blynk + DS18B20 + Deep Sleep

#1

I wrote a code for Wemos D1 mini to connect to Blynk and read the temperature on the sensor DS18B20 and also go to Deep Sleep for a determinated time preserve power.

#define BLYNK_PRINT Serial       
#include <BlynkSimpleEsp8266.h> 

#include <OneWire.h>
#include <DallasTemperature.h> 
#define ONE_WIRE_BUS 2    // Your ESP8266 pin (ESP8266 GPIO 2 = WeMos D1 Mini pin D4)
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// how long to sleep between checking and TX temp/batt values - in seconds
#define SLEEP_LENGTH 60

char auth[] = "xxx";
char ssid[] = "xxx";
char pass[] = "xxx";

SimpleTimer timer;

float roomTemperature;            // Room temperature in F

void setup()
{
  Serial.begin(9600);
  Blynk.begin(auth, ssid, pass);

  while (Blynk.connect() == false) {
    // Wait until connected
  }

  sensors.begin();                        // Starts the DS18B20 sensor(s).
  sensors.setResolution(10);             


{
  sensors.requestTemperatures();                  // Polls the sensors.
  roomTemperature = sensors.getTempFByIndex(0)   // Stores temperature. Change to getTempCByIndex(0) for celcius.
  Blynk.virtualWrite(1, roomTemperature);        // Send temperature to Blynk app virtual pin 1.
}
 Blynk.run();
 timer.run();


  ESP.deepSleep(SLEEP_LENGTH * 1000000,WAKE_RF_DEFAULT);   //try the default mode
  delay(100);
}
void loop()
{
 Blynk.run();
 timer.run();
}
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#2

It looks like you don’t need any timer code in there, at least I don’t see it used in your code. But if you did, better to use the built into the Library BlynkTimer

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