Home Snow maker automation

Hey everyone. I do back yard snowmaking. This comming year i would like to automate my system. I want to see what my system pressures are and control simple sprinkler valves when i click a button. I dont want to have a computer on 24/7…
i have
-eirther net
-two pressure transducers
-micro sd card

My problems are
-how do i display an html page that i made using notes?
-How do i make it a webpage that can be seen from a phone or an internet devise when im at school or away?
-how do i hit a button that says automate and will turn on the valves when there is a temp reading below 28 out?

  Web Server
 A simple web server that shows the value of the analog input pins.
 using an Arduino Wiznet Ethernet shield. 
 * Ethernet shield attached to pins 10, 11, 12, 13
 * Analog inputs attached to pins A0 through A5 (optional)
 created 18 Dec 2009
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe

#include <SPI.h>
#include <Ethernet.h>

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1, 177);

// Initialize the Ethernet server library
// with the IP address and port you want to use 
// (port 80 is default for HTTP):
EthernetServer server(80);

void setup() {
  // Open serial communications and wait for port to open:
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only

  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  Serial.print("server is at ");

void loop() {
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
    Serial.println("new client");
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        if (c == '\n' && currentLineIsBlank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connnection: close");
          client.println("<!DOCTYPE HTML>");
          // variables for pressure transducer reading
          float pressure = 0; // air pressure variable
          float wpressure = 0; // water pressure variable 
          int pressureunits = 0; // values read from transducer
          int i;
          // for the pressure transducer
          float uhigh = 918; // reference value read by transducer at the high end
          float phigh = 200; // reference pressure at high end
          float ulow = 102; // reference value read by are transducer at low end pressure
          float plow = 0; // reference pressure at low end
          float wulow = 72 ;// reference value read by water transducer at low end pressure

          // add a meta refresh tag, so the browser pulls again every 5 seconds:
          client.println("<meta http-equiv=\"refresh\" content=\"5\">");
          // output the value of each analog input pin
          client.print("Home Snowmaking"); 
          pressureunits = analogRead(A0);
            int AIR = (pressureunits-ulow)*(phigh - plow)/(uhigh-ulow);
            client.print("Air Psi");
            client.print(" is ");
          client.println("<meta http-equiv=\"refresh\" content=\"5\">");
          // output the value of each analog input pin
            pressureunits = analogRead(A1);
            int Water = (pressureunits-wulow)*(phigh-plow)/(uhigh-wulow);
            client.print("Water PSI ");
            client.print(" is ");

        if (c == '\n') {
          // you're starting a new line
          currentLineIsBlank = true;
        else if (c != '\r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
    // give the web browser time to receive the data
    // close the connection:
    Serial.println("client disonnected");