BME280に変えてみる

DHT11でモニターが走ってサーバーにもデータを送ってくるようになったが、手元にBME280があったのでこれも試してみることにする。　これも”Todotaniのはやり物Log”のESP-WROOM-02でI2Cセンサーを使用するを参考にさせていただき、Embedded Adventureのコードを利用してみた。　単にArduinoでBME280からデータを引っ張り出して、シリアルモニターに出すプログラムなので、不必要なところをコメントアウトして、DHT11用のコードのESP-WROOM-02の部分をコピペで作ってみました。
当然かもしれませんが、問題なく動きますので、気圧データもとれる此方を、折角なので、基板に収めて室内に暫く侍らしてみることにします。
ソースを見れば分かるように、BME280からデータを引っぱり出すまでに少し時間が掛かる（終わるまてループで待っている）ので、リポートする時間がぴったり1時間毎になりません。　15時から21時までの6時間で13秒程遅れているので、常に遅れる方向にズレるのであれば、delayの時間を調整して、出来るだけ正確に一時間毎にリポートするようにする必要があります。　deep sleepにすれば解決するのかな？
　
BME280はちょっとコストが高いのと、裸の基板の上に載っているので、実際にどんな形状の筐体に収めるのか、ちょっと工夫が要ると思う。

もう少しコストが抑えられないかなー、、。

======================== WeatherMonitorBME280.ino ==============================
/*
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*/

// BME280 MOD-1022 weather multi-sensor Arduino demo
// Written originally by Embedded Adventures

#include
#include
extern "C" {
  #include "user_interface.h"
}

#include

// ESP8266 related codes added by t.Yamada
const char* ssid = "Buffalo-G-4CC0"; // SSID to access network
const char* password = "65rhwrit3nnee"; // password to connect to the network
const char* host = "192.168.1.3"; // host address
const char* Identifier = "MyRoom";  // Identifier to locate the monitor
// Create an instance of the server
// specify the port to listen on as an argument
WiFiServer server(80);


// Arduino needs this to pring pretty numbers
void printFormattedFloat(float x, uint8_t precision) {
char buffer[10];

  dtostrf(x, 7, precision, buffer);
  Serial.print(buffer);

}

// Global declaration to use for WiFi
float t;
float h;
float p;

//print out the measurements
//and set the most accurete values to global variables - added by T.Yamada
void printCompensatedMeasurements(void) {

float temp, humidity,  pressure, pressureMoreAccurate;
double tempMostAccurate, humidityMostAccurate, pressureMostAccurate;
char buffer[80];

  temp      = BME280.getTemperature();
  humidity  = BME280.getHumidity();
  pressure  = BME280.getPressure();
 
  pressureMoreAccurate = BME280.getPressureMoreAccurate();  // t_fine already calculated from getTemperaure() above
 
  t = tempMostAccurate     = BME280.getTemperatureMostAccurate();
  h = humidityMostAccurate = BME280.getHumidityMostAccurate();
  p = pressureMostAccurate = BME280.getPressureMostAccurate();
  Serial.println("                Good  Better    Best");
  Serial.print("Temperature  ");
  printFormattedFloat(temp, 2);
  Serial.print("         ");
  printFormattedFloat(tempMostAccurate,2);
  Serial.println();
 
  Serial.print("Humidity     ");
  printFormattedFloat(humidity, 2);
  Serial.print("         ");
  printFormattedFloat(humidityMostAccurate,2);
  Serial.println();

  Serial.print("Pressure     ");
  printFormattedFloat(pressure, 2);
  Serial.print(" ");
  printFormattedFloat(pressureMoreAccurate,2);
  Serial.print(" ");
  printFormattedFloat(pressureMostAccurate,2);
  Serial.println();
}


// setup wire and serial

void setup()
{
  Wire.begin();
  Serial.begin(115200);

  wifi_set_sleep_type(LIGHT_SLEEP_T);  // couldn't use deep sleep....
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid); 
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
 
}

// main loop

void loop()
{

  uint8_t chipID;
 
  Serial.println("Welcome to the BME280 MOD-1022 weather multi-sensor test sketch!");
  Serial.println("Embedded Adventures (www.embeddedadventures.com)");
  chipID = BME280.readChipId();
 
  // find the chip ID out just for fun
  Serial.print("ChipID = 0x");
  Serial.print(chipID, HEX);
 

  // need to read the NVM compensation parameters
  BME280.readCompensationParams();
 
  // Need to turn on 1x oversampling, default is os_skipped, which means it doesn't measure anything
  BME280.writeOversamplingPressure(os1x);  // 1x over sampling (ie, just one sample)
  BME280.writeOversamplingTemperature(os1x);
  BME280.writeOversamplingHumidity(os1x);
  /*
  // example of a forced sample.  After taking the measurement the chip goes back to sleep
  BME280.writeMode(smForced);
  while (BME280.isMeasuring()) {
    Serial.println("Measuring...");
    delay(50);
  }
  Serial.println("Done!");
 
  // read out the data - must do this before calling the getxxxxx routines
  BME280.readMeasurements();
  Serial.print("Temp=");
  Serial.println(BME280.getTemperature());  // must get temp first
  Serial.print("Humidity=");
  Serial.println(BME280.getHumidity());
  Serial.print("Pressure=");
  Serial.println(BME280.getPressure());
  Serial.print("PressureMoreAccurate=");
  Serial.println(BME280.getPressureMoreAccurate());  // use int64 calculcations
  Serial.print("TempMostAccurate=");
  Serial.println(BME280.getTemperatureMostAccurate());  // use double calculations
  Serial.print("HumidityMostAccurate=");
  Serial.println(BME280.getHumidityMostAccurate()); // use double calculations
  Serial.print("PressureMostAccurate=");
  Serial.println(BME280.getPressureMostAccurate()); // use double calculations
  */
  // Example for "indoor navigation"
  // We'll switch into normal mode for regular automatic samples
 
  BME280.writeStandbyTime(tsb_0p5ms);        // tsb = 0.5ms
  BME280.writeFilterCoefficient(fc_16);      // IIR Filter coefficient 16
  BME280.writeOversamplingPressure(os16x);    // pressure x16
  BME280.writeOversamplingTemperature(os2x);  // temperature x2
  BME280.writeOversamplingHumidity(os1x);     // humidity x1
 
  BME280.writeMode(smNormal);
  char temp[80];
  while (1) {
    while (BME280.isMeasuring()) {
      delay(50);
    }
   
    // read out the data - must do this before calling the getxxxxx routines
    BME280.readMeasurements();
    printCompensatedMeasurements();

    // Use WiFiClient class to create TCP connection
    Serial.print("connecting to ");
    Serial.println(host);
    WiFiClient client;
    const int httpPort = 80;
    if (!client.connect(host, httpPort)){
      Serial.println("connection failed");
      return;
    }
    String url = "/weather/weather_log.php";
           url += "?location=" + String(Identifier); // ID to identify location
           url += "&temperature="+String(t);
           url += "&humidity=" +String(h);
           url += "&pressure=" +String(p);
    Serial.print("Requesting URL: ");
    Serial.println("GET "+url);

    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
                  "Host: " + host + "\r\n" +
                  "Connection: close\r\n\r\n");
    delay(50);
   
    // Read all the lines of the reply from server and print them to Serial
    Serial.println("Returned message from server: ");
    while(client.available()){
      String line = client.readStringUntil('\r');
      Serial.print(line);
    }
 
    Serial.println();
    Serial.println("closing connection");

    //ESP8266 Deep Sleap mode
    //1:μ秒での復帰までのタイマー時間設定 (60分)  2:復帰するきっかけの設定（モード設定）
    //ESP.deepSleep(1 * 60 * 1000 * 1000 , WAKE_RF_DEFAULT); 

    //deepsleepモード移行までのダミー命令
    // delay(1000);
    delay (60*60*1000-800);  // 60 min delay
  }
}