li2hub/C003U6P1_gas_sensor.ino

## C003U6P1_gas_sensor.ino
/****Libraries required****/
#include <ESP8266WiFi.h>      //ESP8266 main library
#include <ESP8266WebServer.h> //Library to handle Web Server commands
#include <Wire.h>
#include "MutichannelGasSensor.h"

const char *ssid = "ESP8266";       //Name of the Access Point
const char *password = "12345678";  //Password of the Access Point

/****Define a web server at port 80 for HTTP****/
ESP8266WebServer server(80);  // Use port 443 for HTTPS

/****Let's include a custom (static) IP****/
IPAddress    apIP(1,3,5,7); //You can use your own numbers for the IP


void setup() {
  delay(1000);
  Serial.begin(115200);
  gas.begin(0x04);//the default I2C address of the slave is 0x04
  gas.powerOn();
  Serial.println();
  Serial.println("Configuring access point...");

  WiFi.mode(WIFI_AP_STA);
  WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0));   // subnet FF FF FF 00

  WiFi.softAP(ssid, password); // Use Wifi.softAP(ssid) if you want an unprotected Access Point

  IPAddress myIP = WiFi.softAPIP();
  Serial.print("AP IP address: ");
  Serial.println(myIP);


  //The following commands tell the ESP which sub-routines to follow when a particular request is received
  server.on ( "/", handleRoot );
  server.onNotFound ( handleNotFound );

  server.begin();
  Serial.println("HTTP server started");
}

void loop() {
  server.handleClient();
}


void handleRoot() {
  char html[1000];
  int sec = millis() / 1000;
  int min = sec / 60;
  int hr = min / 60;
  float nh3,co,no2,c3h8,c4h10,ch4,h2,c2h5oh;

nh3=gas.measure_NH3();
co=gas.measure_CO();
no2=gas.measure_NO2();
c3h8=gas.measure_C3H8();
c4h10=gas.measure_C4H10();
ch4=gas.measure_CH4();
h2=gas.measure_H2();
c2h5oh=gas.measure_C2H5OH();

  if(co>500){
 snprintf ( html, 1000,
"<html>\
  <head>\
    <meta name='viewport' content='width=device-width, initial-scale=1.0'>\
    <meta http-equiv='refresh' content='5'/>\
    <title>ESP8266 Application</title>\
    <style>\
      body { background-color:#FF0000; font-family: Bookman; font-size: 1.5em;  Color:#F7E543; }\
      h1 { Color: #F7E543; }\
    </style>\
  </head>\
  <body>\
    <h1><center>ESP8266 Gas Sensor</center></h1>\
    <p><center>Uptime: %02d:%02d:%02d</center></p>\
    <p>NH3 Concentration: %f</p>\
    <h2>CO Concentration: %f</p>\
    <p>NO2 Concentration: %f</p>\
    <p>C3H8 Concentration: %f</p>\
    <p>C4H10 Concentration: %f</p>\
    <p>CH4 Concentration: %f</p>\
    <p>H2 Concentration: %f</p>\
    <p>C2H5OH Concentration: %f</p>\
    <p><center>This page refreshes every 5 seconds. Click <a href=\"javascript:window.location.reload();\">here</a> to refresh the page now.</center></p>\
  </body>\
</html>",

    hr, min % 60, sec % 60,
    nh3,co,no2,c3h8,c4h10,ch4,h2,c2h5oh
  );
  server.send ( 200, "text/html", html );
}
else{
/****Build an HTML page to display on the web-server root address****/
  snprintf ( html, 1000,
"<html>\
  <head>\
    <meta name='viewport' content='width=device-width, initial-scale=1.0'>\
    <meta http-equiv='refresh' content='10'/>\
    <title>ESP8266 Application</title>\
    <style>\
      body { background-color:#FFFFFF; font-family: Bookman; font-size: 1.5em;  Color:#000000; }\
      h1 { Color: #000000; }\
    </style>\
  </head>\
  <body>\
    <h1><center>ESP8266 Gas Sensor</center></h1>\
    <p><center>Uptime: %02d:%02d:%02d</center></p>\
    <p>NH3 Concentration: %f</p>\
    <p>CO Concentration: %f</p>\
    <p>NO2 Concentration: %f</p>\
    <p>C3H8 Concentration: %f</p>\
    <p>C4H10 Concentration: %f</p>\
    <p>CH4 Concentration: %f</p>\
    <p>H2 Concentration: %f</p>\
    <p>C2H5OH Concentration: %f</p>\
    <p><center>This page refreshes every 10 seconds. Click <a href=\"javascript:window.location.reload();\">here</a> to refresh the page now.</center></p>\
  </body>\
</html>",

    hr, min % 60, sec % 60,
    nh3,co,no2,c3h8,c4h10,ch4,h2,c2h5oh
  );
  server.send ( 200, "text/html", html );
}
}
//This function handles unknown requests
void handleNotFound() {
  String message = "File Not Found\n\n";
  message += "URI: ";
  message += server.uri();
  message += "\nMethod: ";
  message += ( server.method() == HTTP_GET ) ? "GET" : "POST";
  message += "\nArguments: ";
  message += server.args();
  message += "\n";

  for ( uint8_t i = 0; i < server.args(); i++ ) {
    message += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n";
  }

  server.send ( 404, "text/plain", message );

}
	/**Libraries required**/
	#include <ESP8266WiFi.h> //ESP8266 main library
	#include <ESP8266WebServer.h> //Library to handle Web Server commands
	#include <Wire.h>
	#include "MutichannelGasSensor.h"

	const char *ssid = "ESP8266"; //Name of the Access Point
	const char *password = "12345678"; //Password of the Access Point

	/**Define a web server at port 80 for HTTP**/
	ESP8266WebServer server(80); // Use port 443 for HTTPS

	/**Let's include a custom (static) IP**/
	IPAddress apIP(1,3,5,7); //You can use your own numbers for the IP


	void setup() {
	delay(1000);
	Serial.begin(115200);
	gas.begin(0x04);//the default I2C address of the slave is 0x04
	gas.powerOn();
	Serial.println();
	Serial.println("Configuring access point...");

	WiFi.mode(WIFI_AP_STA);
	WiFi.softAPConfig(apIP, apIP, IPAddress(255, 255, 255, 0)); // subnet FF FF FF 00

	WiFi.softAP(ssid, password); // Use Wifi.softAP(ssid) if you want an unprotected Access Point

	IPAddress myIP = WiFi.softAPIP();
	Serial.print("AP IP address: ");
	Serial.println(myIP);


	//The following commands tell the ESP which sub-routines to follow when a particular request is received
	server.on ( "/", handleRoot );
	server.onNotFound ( handleNotFound );

	server.begin();
	Serial.println("HTTP server started");
	}

	void loop() {
	server.handleClient();
	}


	void handleRoot() {
	char html[1000];
	int sec = millis() / 1000;
	int min = sec / 60;
	int hr = min / 60;
	float nh3,co,no2,c3h8,c4h10,ch4,h2,c2h5oh;

	nh3=gas.measure_NH3();
	co=gas.measure_CO();
	no2=gas.measure_NO2();
	c3h8=gas.measure_C3H8();
	c4h10=gas.measure_C4H10();
	ch4=gas.measure_CH4();
	h2=gas.measure_H2();
	c2h5oh=gas.measure_C2H5OH();

	if(co>500){
	snprintf ( html, 1000,
	"<html>\
	<head>\
	<meta name='viewport' content='width=device-width, initial-scale=1.0'>\
	<meta http-equiv='refresh' content='5'/>\
	<title>ESP8266 Application</title>\
	<style>\
	body { background-color:#FF0000; font-family: Bookman; font-size: 1.5em; Color:#F7E543; }\
	h1 { Color: #F7E543; }\
	</style>\
	</head>\
	<body>\
	<h1><center>ESP8266 Gas Sensor</center></h1>\
	<p><center>Uptime: %02d:%02d:%02d</center></p>\
	<p>NH3 Concentration: %f</p>\
	<h2>CO Concentration: %f</p>\
	<p>NO2 Concentration: %f</p>\
	<p>C3H8 Concentration: %f</p>\
	<p>C4H10 Concentration: %f</p>\
	<p>CH4 Concentration: %f</p>\
	<p>H2 Concentration: %f</p>\
	<p>C2H5OH Concentration: %f</p>\
	<p><center>This page refreshes every 5 seconds. Click <a href=\"javascript:window.location.reload();\">here</a> to refresh the page now.</center></p>\
	</body>\
	</html>",

	hr, min % 60, sec % 60,
	nh3,co,no2,c3h8,c4h10,ch4,h2,c2h5oh
	);
	server.send ( 200, "text/html", html );
	}
	else{
	/**Build an HTML page to display on the web-server root address**/
	snprintf ( html, 1000,
	"<html>\
	<head>\
	<meta name='viewport' content='width=device-width, initial-scale=1.0'>\
	<meta http-equiv='refresh' content='10'/>\
	<title>ESP8266 Application</title>\
	<style>\
	body { background-color:#FFFFFF; font-family: Bookman; font-size: 1.5em; Color:#000000; }\
	h1 { Color: #000000; }\
	</style>\
	</head>\
	<body>\
	<h1><center>ESP8266 Gas Sensor</center></h1>\
	<p><center>Uptime: %02d:%02d:%02d</center></p>\
	<p>NH3 Concentration: %f</p>\
	<p>CO Concentration: %f</p>\
	<p>NO2 Concentration: %f</p>\
	<p>C3H8 Concentration: %f</p>\
	<p>C4H10 Concentration: %f</p>\
	<p>CH4 Concentration: %f</p>\
	<p>H2 Concentration: %f</p>\
	<p>C2H5OH Concentration: %f</p>\
	<p><center>This page refreshes every 10 seconds. Click <a href=\"javascript:window.location.reload();\">here</a> to refresh the page now.</center></p>\
	</body>\
	</html>",

	hr, min % 60, sec % 60,
	nh3,co,no2,c3h8,c4h10,ch4,h2,c2h5oh
	);
	server.send ( 200, "text/html", html );
	}
	}
	//This function handles unknown requests
	void handleNotFound() {
	String message = "File Not Found\n\n";
	message += "URI: ";
	message += server.uri();
	message += "\nMethod: ";
	message += ( server.method() == HTTP_GET ) ? "GET" : "POST";
	message += "\nArguments: ";
	message += server.args();
	message += "\n";

	for ( uint8_t i = 0; i < server.args(); i++ ) {
	message += " " + server.argName ( i ) + ": " + server.arg ( i ) + "\n";
	}

	server.send ( 404, "text/plain", message );

	}