IR Controller for Air Conditioner

// AC Unit Controller by Buddy Crotty
// Temp is set manually in this sketch
// Additional settings will be pulled from HAI in checkserver() function in a later release
// Temp and humidity are sent to HAI server for logging
// IR blaster is using RAW IR codes to set AC thermostat at min/max values to force AC to turn on/off

const char* host = "192.168.1.80";           // Internal IP of (Home Automation w/ Intellegence) Webserver
const char* devID = "downstairs";            // Device ID (single word, no spaces, no special characters)

#include <IRremote.h>
#include <SoftwareSerial.h>
#include "DHT.h"                              // Written by ladyada, public domain
IRsend irsend;   
SoftwareSerial ser(10, 11); // (RX, TX)       // Software serial for controling ESP8266 Module
                                              // Hardware serial for debugging


int khz = 38; // 38kHz carrier frequency 
// Insert RAW IR signal for "Temperature Up"
unsigned int irSignalUp[] = {8350,4150, 550,1550, 550,1550, 550,1550, 550,500, 550,1550, 550,550, 500,1600, 500,1600, 500,4150, 550,500, 550,550, 500,550, 500,1600, 500,550, 500,550, 550,500, 550,550, 600};  // UNKNOWN CE608146 TempUp
// Insert RAW IR signal for "Temperature Down"
unsigned int irSignalDown[] = {8350,4150, 550,1550, 550,1550, 550,1600, 500,550, 500,1600, 500,550, 500,1600, 500,1600, 500,4200, 500,1600, 500,550, 500,550, 500,1600, 550,500, 550,500, 550,550, 500,550, 600};  // UNKNOWN 3F3D09A5 TempDown
// IR pin is digital pin 3                                             
int ACTEMP = 85;        // Default temp at which the AC turns on (85*F)
const int numReadings = 10;  // Readings used for average
#define DHTPIN 2        // DHT Sensor
int ACON = 0;           // AC state. Assumes AC is off on first boot

// Uncomment whatever type you're using
#define DHTTYPE DHT11   // DHT11, DHT22 or DHT21

// Initialize DHT sensor for normal 16mhz Arduino
DHT dht(DHTPIN, DHTTYPE);

// Set variables to zero
float avetemp = 0;                
float temp = 0;

/*
 * next up is adding a timer instead of delays
unsigned long tempMillis = 0;             // will store last time temp was updated
unsigned long serverMillis = 0;           // will store last time server was updated
unsigned long postMillis = 0;             // will store last time temp was posted
unsigned long ACMillis = 0;               // will store last time AC was checked
const long tempival = 30000;              // interval to check temp (every 30 seconds)
const long servercheckival = 60000;       // interval to check server config (every minute)
const long temppostival = 900000;         // interval to post new temp stats (every 15 minutes)
const long ACcooldown = 300000;           // time to wait if AC is already on (5 minutes)
*/

void setup() {
  Serial.begin(9600);
  ser.begin(9600);

  /*
  // Uncomment to reset WiFi settings
    delay(1000);
    ser.println("AT+CWMODE=1");
    ser.println("AT+CWJAP=\"SSID\",\"Password\"");
  */

  delay(2000);
  dht.begin();

  Serial.println("IR controlled AC Started");
  
  dht.begin();
 
  Serial.println("Giving everything a chance to warm up");          //wait 25 seconds for WiFi to connect
  Serial.println("|-------------------------|");
  Serial.print("|");
  for(int x = 0; x < 25; x++){
    Serial.print("#");
    delay(1000); 
  }
  Serial.println("|");
  Serial.println("Done");
}

void checkserver() {
  // Update thermostat setting (ACTEMP=##) from HAI
  // Thermostat override with TurnACon=true or TurnACoff=true
}

void turnACon() {
  // Run IR code to turn on AC
    Serial.print("Temperature is over ");
    Serial.print(ACTEMP);
    Serial.print(", AC is on (for 5 minutes)");
      // Send IR signal to turn AC Unit ON
      // Turn thermostat all the way down to make AC kick on
      for (int x = 0; x <250; x++){
        irsend.sendRaw(irSignalDown, sizeof(irSignalDown) / sizeof(irSignalDown[0]), khz); 
        delay(22);  
      }
    ACON = 1;
    delay(285000);                                // turn on minimum of 5 min (subtracted 15 seconds for gettemp)
}

void turnACoff() {
  // Run IR code to turn off AC
    Serial.print("Temperature is under ");
    Serial.print(ACTEMP);
    Serial.println(", AC is off");   
      // Send IR signal to turn AC Unit OFF               
      // Turn thermostat all the way up so that AC never kicks on
      for (int x = 0; x <250; x++){
         irsend.sendRaw(irSignalUp, sizeof(irSignalUp) / sizeof(irSignalUp[0]), khz); 
         delay(22);  
      }
    ACON = 0; 
    delay(15000);                             // When AC is off, Temp is read every 30 seconds (15+15)
}

void gettemp() {
  // pull temp from sensor and send to server
  // whole process takes about 
    Serial.print("Realtime Temp: \t");

  // Average temp over numReadings * delay
  temp = 0;
  for (int x = 0; x < numReadings; x++){
    float f = dht.readTemperature(true);            // Read temperature as Fahrenheit
    Serial.print(f);
    Serial.print("\t");
    temp = f + temp;
    delay(1000);                                    // delay in between reads for stability  
  }    
  Serial.println();

  avetemp = temp / numReadings;                     // calculate the average
    int h = dht.readHumidity();
    float hi = dht.computeHeatIndex(avetemp, h);    // convert to 'feels like' temp (heat index based on humidity)
  Serial.print("Average Temp is ");
  Serial.println(hi);                               // send it to the computer as ASCII digits

  // Check if any reads failed and exit early (to try again).
  if (isnan(hi)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

// Output values being sent to ThingSpeak/local web server
  Serial.print("Temperature: "); 
  Serial.print(avetemp);
  Serial.print(" *F\t");
  Serial.print("Heat Index: ");
  Serial.print(hi);
  Serial.println(" *F");  
  Serial.print("Humidity: "); 
  Serial.print(h);  
  Serial.println("%\t");  
  Serial.print("...connecting to ");
  Serial.println(host);  
  
  // TCP connection
  String cmd = "AT+CIPSTART=\"TCP\",\"";
  cmd += host;             
  cmd += "\",80";
  ser.println(cmd);
    delay(1000); 
  if(ser.find("Error")){
    Serial.println("AT+CIPSTART error");
    return;
  }
  else{
  }

  // prepare GET string
  String getStr = "GET /tempupdate.php?ID=";
  getStr += devID;
  getStr += "&field1="; //Temp
  getStr += avetemp;
  getStr += "&field2="; //Humidity
  getStr += h;
  getStr += "&field3="; //Heat Index
  getStr += hi;
  getStr += "\r\n\r\n";

  Serial.print("Sending data URL: ");
  Serial.println(getStr);

  // send data length
  cmd = "AT+CIPSEND=";
  cmd += String(getStr.length());
  ser.println(cmd);

  if(ser.find(">")){
    ser.print(getStr);
    Serial.println("Success!");
  }
  else{
    ser.println("AT+CIPCLOSE");
    Serial.println("Connection Failed");            // alert user
  }
}

void loop() {
  // Get updated settings from server
  checkserver();

  // read the sensor and send results to server
  gettemp();
  
  // if room is cool and AC is off, do nothing
  if (avetemp<ACTEMP && ACON==0){
    Serial.print("Temperature is ");
    Serial.print(avetemp);
    Serial.println(", AC is already off");           
    delay(15000);                             // When AC is off, Temp is read every 30 seconds (temp read takes 15 seconds)
  }
  
  // if room is hot and AC is already running, do nothing
  if (avetemp>ACTEMP && ACON==1){
    Serial.print("Temperature is ");
    Serial.print(avetemp);
    Serial.println(", AC is already on");           
    delay(285000);                             // When AC is on, Temp is only read every 5 min 
  }

  // Turn off AC if room is already cooled
  if (avetemp<ACTEMP && ACON==1){
    turnACoff();
    }

  // Turn on AC if room is too warm
  if (avetemp>ACTEMP && ACON==0) {
    turnACon();
    }

  Serial.println();
  Serial.println();
  
}