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esp8266-KUH/include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

esp8266-KUH/include/main.h

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+#include <Arduino.h>
+#include <SPI.h>
+#include <ESP8266WiFi.h>
+#include <WiFiClient.h>
+//#include <ESP8266WebServer.h>
+#include <ESP8266mDNS.h>
+#include <WiFiUdp.h>
+#include <ArduinoOTA.h>
+#include <PubSubClient.h>
+#include <BME280I2C.h>
+//#include <ArduinoJson.h>
+
+#include <EEPROM.h>
+
+#include <Wire.h>
+#include <pcf8574_esp.h>
+#include <LiquidCrystal_PCF8574.h>
+
+#include <DallasTemperature.h>
+
+#include <Bounce2.h>
+
+#define ONE_WIRE_BUS D4
+
+union uFloat {
+  byte b[4];
+  float f;
+  int i;
+} wcH, wcC, ls, ld;
+
+void wCycle();
+void showLCD();
+void getTemp();
+void initLCD();
+void initWiFi();
+void initTemp();
+//void readEEPROM();
+void readDI();
+void movSens();
+void callback(String topic, byte* message, unsigned int length);
+void reconnect();
+void handleData();
+//void writeEEPROM(const char tip[2], uFloat val);
+void publishSec();
+void publishMin();