Snippet to reset bme280 sensor on erroneous readings

bm280.cpp

void BME280_Reset()
{
  if(DEBUG) Serial.println(F("BME280 Reset"));
  Wire.beginTransmission(BME280_I2C_ADDR);
  Wire.write((uint8_t)BME280_REGISTER_SOFTRESET);
  Wire.write((uint8_t)0xB6);
  Wire.endTransmission();
  delay(1000);
}

##########################################################

  // Start with temperature, as that data is needed for accurate compensation.
  // Reading the temperature updates the compensators of the other functions in the background.
  scratchfloat = bme.readTemperature();
  if(isnan(scratchfloat) || (scratchfloat == 0))
  {
    scratchfloat = temperature;                             // Just use last value instead to prevent perpetual NaN
    sendStatus(LoRaDevice " Temperature Reboot.");
    resetNeeded = true;
  }
  temperature += scratchfloat;
  temperature = temperature / 2;
  delay(1);
  
  scratchfloat = bme.readPressure() / 100.0F;
  if(isnan(scratchfloat) || (scratchfloat == 0))
  {
    scratchfloat = pressure;                                // Just use last value instead
    sendStatus(LoRaDevice " Pressure Reboot.");
    resetNeeded = true;
  }
  pressure += scratchfloat;
  pressure = pressure / 2;
  delay(1);
  
  scratchfloat = bme.readAltitude(SEALEVELPRESSURE_HPA);
  if(isnan(scratchfloat) || (scratchfloat == 0))
  {
    scratchfloat = altitude;                                // Just use last value instead
    sendStatus(LoRaDevice " Altitude Reboot.");
    resetNeeded = true;
  }
  altitude += scratchfloat;
  altitude = altitude / 2;
  delay(1);
  
  scratchfloat = bme.readHumidity();
  if(isnan(scratchfloat) || (scratchfloat == 0))
  {
    scratchfloat = humidity;                                // Just use last value instead
    sendStatus(LoRaDevice " Humidity Reboot.");
    resetNeeded = true;
  }
  humidity += scratchfloat;
  humidity = humidity / 2;
  
  if(resetNeeded)
  {
    BME280_Reset();
  }

By user 'Riva' on the arduino forums. Original post here.