Lab_interaccio/2016/weatherlamp/timetemp/timetemp.ino

#include <stdlib.h>
#include <ArduinoJson.h>

//____________

//int rgb[3] = {255,255,255}; // RELLENAR COLOR FRIO

//____

#define SSID "hangar_polivalent" // insert your SSID
#define PASS "p0l1v4l3nc14s" // insert your password

#define WeatherWS_IP "188.226.224.148" //api.openweathermap.org
#define TimeWS_IP "208.113.226.171" //earthtools.org

#define LOCATION_NAME "Barcelona,es" // location
#define LOCATION_LL "41.3871/2.1685" // location latitude/longitude/

StaticJsonBuffer<200> jsonBuffer;
  
void setup()
{
  Serial1.begin(9600);
  Serial1.setTimeout(5000);
  Serial.begin(9600); // for debuging
  while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }
  Serial.println("Init");

  do{
    Serial1.println("AT+RST");
    Serial.println("WiFi - Module is missing");
    delay(100);
  }
  while(!Serial1.find("ready"));
  Serial.println("WiFi - Module is ready");
  
  delay(1000);
  
  // try to connect to wifi
  boolean connected = false;
  for (int i = 0; i < 5; i++) {
    if (connectWiFi()) {
      connected = true;
      break;
    }
  }
  if (!connected) {
    while (1);
  }
  delay(5000);
  Serial1.println("AT+CIPMUX=0"); // set to single connection mode
}
void loop()
{
  
  int h = getTime();
  Serial.print("time = "); Serial.println(h);
 
  //for(int i=0;i<20;i++){Serial.print(i);delay(1000);}
  int t = getTemp();
  Serial.print("temp = "); Serial.println(t);
  
  for(int i=0;i<20;i++){Serial.print(i);delay(1000);}
  
}

int getTime(){
  String cmd = "AT+CIPSTART=\"TCP\",\"";
  cmd += TimeWS_IP;
  cmd += "\",80";
  Serial1.println(cmd);
  Serial.println(cmd);
  if (Serial1.find("Error")) 
    return -1;
    
  cmd = "GET /timezone/";
  cmd += LOCATION_LL;
  cmd += " HTTP/1.0\r\nHost: www.earthtools.org\r\n\r\n";
  Serial1.print("AT+CIPSEND=");
  Serial1.println(cmd.length());
  
  if (Serial1.find(">")) {
    Serial.println(">");
  } else {
    Serial1.println("AT+CIPCLOSE");
    Serial.println("connection timeout");
    delay(1000);
    return -1;
  }
  Serial1.print(cmd);
  unsigned int i = 0; //timeout counter
  
  //char json[100] = "{";
  while (!Serial1.find("<localtime>")) {} // find the part we are interested in.
  while (!Serial1.find("2015 ")) {} // find the part we are interested in.
  
  char h[2];
  Serial1.readBytes(h, 2);
  int hour = atoi(h);
  
  //Serial.println(hour);
  
  // flush
  while(Serial1.available()){
    char c = Serial1.read();
  }  
  
  return hour;
}
  
int getTemp(){
  String cmd = "AT+CIPSTART=\"TCP\",\"";
  cmd += WeatherWS_IP;
  cmd += "\",80";
  Serial1.println(cmd);
  Serial.println(cmd);
  
  if (Serial1.find("Error")){
     Serial.println("error");
    return -1;
  }
  cmd = "GET /data/2.5/weather?q=";
  cmd += LOCATION_NAME;
  cmd += "&mode=xml";
  cmd += " HTTP/1.0\r\nHost: api.openweathermap.org\r\n\r\n";
   
  Serial1.print("AT+CIPSEND=");
  Serial1.println(cmd.length());
    
  if (Serial1.find(">")) {
    Serial.println(">");
  } else {
    Serial1.println("AT+CIPCLOSE");
    Serial.println("connection timeout");
    //delay(1000);
    return -1;
  }
  Serial1.println(cmd);

//  unsigned int i = 0; //timeout counter
//  int n = 1; // char counter
//  char json[100] = "{";
//  while (!Serial1.find("\"main\":{")) {} // find the part we are interested in.
//  while (i < 60000) {
//    if (Serial1.available()) {
//      char c = Serial1.read();
//      json[n] = c;
//      if (c == '}') break;
//      n++;
//      i = 0;
//    }
//    i++;
//  }
//  Serial.println(json);
//  JsonObject& root = jsonBuffer.parseObject(json);
//  if (!root.success()) {
//    Serial.println("parseObject() failed");
//    return -1;
//  }
//  
//  double temp = root["temp"];
//  temp -= 273.15; 
  
  int temperature = -111;
   
  while (!Serial1.find("<temperature value=")) {} // find the part we are interested in.
  
  //Serial.println("seguimos");
  //char c0 = Serial1.read();
  //char c1 = Serial1.read();
  //Serial.print("c = "); Serial.println(c);
  char space[1];
  Serial1.readBytes(space, 1);
  
  char temp[3];
  Serial1.readBytes(temp, 3);
  Serial.print("read temp = "); Serial.print(temp[0]); Serial.print(temp[1]); Serial.print(temp[2]); //Serial.println(temp[3]);

  temperature = atoi(temp)-273;
  //Serial.println(hour);
  
  // flush
  while(Serial1.available()){
    Serial.print(Serial1.read());
  }  
  
  //Serial.println(temp,6);
  return temperature;
}
  
boolean connectWiFi()
{
  Serial1.println("AT+CWMODE=1");
  String cmd = "AT+CWJAP=\"";
  cmd += SSID;
  cmd += "\",\"";
  cmd += PASS;
  cmd += "\"";
  Serial.println(cmd);
  Serial1.println(cmd);
  delay(2000);
  if (Serial1.find("OK")) {
    Serial.println("OK, Connected to WiFi.");
    return true;
  } else {
    Serial.println("Can not connect to the WiFi.");
    return false;
  }
}