1.3寸 SH1106 OLED+ESP8266 NodeMCU+DHT11气象站制作过程（三）

由于代码截图讲解不便，所以代码解释直接在代码注释里。

一、非配网版（先试验成功后再试下面的微信配网版）

/**The MIT License (MIT)

Copyright (c) 2018 by Daniel Eichhorn - ThingPulse

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

See more at https://thingpulse.com
*/
//#include <U8g2lib.h>
#include "DHT.h"
#include <Arduino.h>
#include <ESPWiFi.h>
#include <ESPHTTPClient.h>
#include <JsonListener.h>

// time
#include <time.h>                       // time() ctime()
#include <sys/time.h>                   // struct timeval
#include <coredecls.h>                  // settimeofday_cb()

#include "SH1106Wire.h"
#include "OLEDDisplayUi.h"
#include "Wire.h"
#include "OpenWeatherMapCurrent.h"
#include "OpenWeatherMapForecast.h"
#include "WeatherStationFonts.h"
#include "WeatherStationImages.h"


/***************************
 * Begin Settings
 **************************/
#define DHTTYPE DHT11 
#define DHTPIN D5  //dht11 

// WIFI
const char* WIFI_SSID = "J.Fla";                  //WIFI账号
const char* WIFI_PWD = "j.fla123";                //WIFI密码

#define TZ              7       // (utc+) TZ in hours
#define DST_MN          60      // use 60mn for summer time in some countries

// Setup
const int UPDATE_INTERVAL_SECS = 20 * 60; // Update every 20 minutes

// Display Settings
const int I2C_DISPLAY_ADDRESS = 0x3c;

#if defined(ESP8266)
const int SDA_PIN = D1;
const int SDC_PIN = D2;
#else
const int SDA_PIN = D1; //D3;
const int SDC_PIN = D2; //D4;
#endif

//U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE,D2,D1);

// OpenWeatherMap Settings
// Sign up here to get an API key:
// https://docs.thingpulse.com/how-tos/openweathermap-key/
String OPEN_WEATHER_MAP_APP_ID = "798ef2d2c9d7e1a7ae2c5058e2ce03e0";
/*
Go to https://openweathermap.org/find?q= and search for a location. Go through the
result set and select the entry closest to the actual location you want to display 
data for. It'll be a URL like https://openweathermap.org/city/2657896. The number
at the end is what you assign to the constant below.
 */
String OPEN_WEATHER_MAP_LOCATION_ID = "1804540";

// Pick a language code from this list:
// Arabic - ar, Bulgarian - bg, Catalan - ca, Czech - cz, German - de, Greek - el,
// English - en, Persian (Farsi) - fa, Finnish - fi, French - fr, Galician - gl,
// Croatian - hr, Hungarian - hu, Italian - it, Japanese - ja, Korean - kr,
// Latvian - la, Lithuanian - lt, Macedonian - mk, Dutch - nl, Polish - pl,
// Portuguese - pt, Romanian - ro, Russian - ru, Swedish - se, Slovak - sk,
// Slovenian - sl, Spanish - es, Turkish - tr, Ukrainian - ua, Vietnamese - vi,
// Chinese Simplified - zh_cn, Chinese Traditional - zh_tw.
String OPEN_WEATHER_MAP_LANGUAGE = "en";
const uint8_t MAX_FORECASTS = 4;

const boolean IS_METRIC = true;

// Adjust according to your language
const String WDAY_NAMES[] = {"SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};
const String MONTH_NAMES[] = {"JAN", "FEB", "MAR", "APR", "MAY", "JUN", "JUL", "AUG", "SEP", "OCT", "NOV", "DEC"};

/***************************
 * End Settings
 **************************/
 // Initialize the oled display for address 0x3c
 // sda-pin=14 and sdc-pin=12
 SH1106Wire     display(I2C_DISPLAY_ADDRESS, SDA_PIN, SDC_PIN);
 OLEDDisplayUi   ui( &display );

OpenWeatherMapCurrentData currentWeather;
OpenWeatherMapCurrent currentWeatherClient;

OpenWeatherMapForecastData forecasts[MAX_FORECASTS];
OpenWeatherMapForecast forecastClient;

#define TZ_MN           ((TZ)*60)
#define TZ_SEC          ((TZ)*3600)
#define DST_SEC         ((DST_MN)*60)
time_t now;

// flag changed in the ticker function every 10 minutes
bool readyForWeatherUpdate = false;

String lastUpdate = "--";

long timeSinceLastWUpdate = 0;

//declaring prototypes
void drawProgress(OLEDDisplay *display, int percentage, String label);
void updateData(OLEDDisplay *display);
void drawDateTime(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
void drawCurrentWeather(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
void drawForecast(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
void drawForecastDetails(OLEDDisplay *display, int x, int y, int dayIndex);
void drawHeaderOverlay(OLEDDisplay *display, OLEDDisplayUiState* state);
void setReadyForWeatherUpdate();
void drawCurrentHT(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);


// Add frames
// this array keeps function pointers to all frames
// frames are the single views that slide from right to left
FrameCallback frames[] = { drawDateTime, drawCurrentWeather, drawForecast,drawCurrentHT };
int numberOfFrames = 4;

OverlayCallback overlays[] = { drawHeaderOverlay };
int numberOfOverlays = 1;

DHT dht(DHTPIN, DHTTYPE);

  float old_h  ;
  float old_t  ;

void setup() {
  Serial.begin(115200);
  Serial.println();
  Serial.println();
  
  //initialize dht11
  dht.begin(); 
  //u8g2.begin();
  //u8g2.enableUTF8Print();
  // initialize dispaly
  display.init();
  display.clear();
  display.display();

  //display.flipScreenVertically();
  display.setFont(ArialMT_Plain_10);
  display.setTextAlignment(TEXT_ALIGN_CENTER);
  d