ESP8266 Community Forum

- Sun May 03, 2015 4:51 am #16332 Hi

Have anyone has done a esp8266 webclient that can read rss. I have code that does that through through arduino using Ethernet shield. i want to do the same with esp8266. can anyone help with this?

- Sun May 03, 2015 8:09 am #16345 Please share the code, so we can have a look.

- Mon May 11, 2015 10:49 pm #17201 Below is the code. I want to archive this using ESP8266 instead of Ethernet Shield

Code: Select all#include <Ethernet.h>
#include <TextFinder.h>
#include <SPI.h>
#include <string.h>
#include <Arduino.h>
#include <Wire.h>
#include <MicroLCD.h>

byte mac[] = {
0x90, 0xA2, 0xDA, 0x0D, 0x14, 0xBF }; //Ethernet Sheild MAC address
byte server[] = {
202,53,191,1 }; //Geonet IP

EthernetClient client;

TextFinder finder(client);

LCD_SSD1306 lcd; /* for SSD1306 OLED module */


String readbuffer = "";  //temp store previous reading
char readquake[100];     //string for incoming serial data
const int relay = 3;     //pin number for relay

#define RELAY_ON 0      //relay ON
#define RELAY_OFF 1     //relay OFF

long TemppreviousMillis = 0;      // will store last time temp was updated
long Tempinterval = 15000;        // interval at which to relay turns OFF (milliseconds)
unsigned long currentMillis;      // store time relay turns ON

String strMagnitude = "";
String strDay = "";
String strNow = "";
String strLocation = "";
String strTime = "";
String strDate = "";
String strIntensity = "";

void setup()
{
   Serial.begin(9600);
   Ethernet.begin(mac);
   lcd.begin();
   
   //Initialize Pins so relays are inactive at reset
   digitalWrite(relay, RELAY_OFF);
   //set relay pins as ouputs
   pinMode(relay, OUTPUT);
}

void loop()
{
   if (client.connect(server,80))  //connect to Geonet server on port 80
   {
      client.println("GET /quakes/services/all.rss");  //connect to geonet rss
      client.println("Host:beta.geonet.org.nz");
      client.println("Connection: close");
      client.println();
   }
   
   else
   {
      Serial.println("connection failed");
   }
   
   if (client.connected())  //when connected grab the data
   {
      
      if(finder.find("<title>"))  //find word 'title' on rss
      {
         finder.getString("Magnitude", "<", readquake, (100)); //find word 'magnitute' the read 100 characters till character '<' is found.
         
         
         if (String(readquake) != readbuffer) {  //if read is new then print and turn ON relay
            Serial.print("Magnitude ");
            Serial.println(readquake);
            
            
            readbuffer = String(readquake);

            int magnitude = readbuffer.indexOf(',');
            int day = readbuffer.indexOf(',', magnitude + 1);
            int now = readbuffer.indexOf(',', day + 1);
            int location = readbuffer.length();
            
            //Serial.println(magnitude);
            strMagnitude = readbuffer.substring(1,magnitude);
            //Serial.println(strMagnitude);
            
            //Serial.println(day);
            strDay = readbuffer.substring(magnitude + 2,day);
            //Serial.println(strDay);
            
            //Serial.println(now);
            strNow = readbuffer.substring(day + 2 ,now);
            //Serial.println(strNow);
            
            //Serial.println(location);
            strLocation = readbuffer.substring(now + 2,location);
            //Serial.println(strLocation);
            
            int date = strNow.indexOf("at");
            //Serial.println(date);
            strDate = strNow.substring(0,date);
            strTime = strNow.substring(date + 3, strNow.length() - 6);
            //Serial.println(strDate);
            //Serial.println(strTime);
            
            MMintensity(strMagnitude);
            OLEDDisplay();
            
            
            //turn the relay ON
            digitalWrite(relay, RELAY_ON);
            TemppreviousMillis = currentMillis;// save the last time relay was turned ON
         }
         
         relayOFF(); //turn relay OFF
      }
      else
      Serial.print("Could not find condition field");
   }
   else
   {
      Serial.println("Disconnected");
   }
   client.stop();  //clear buffer
   client.flush();
   delay(10000);  //wait 10 sec before checking rss again.
   
}

//Function to turn OFF relay
void relayOFF() {
   currentMillis = millis();
   
   if(currentMillis - TemppreviousMillis > Tempinterval)  //wait set interval time before turning off relay
   {
      digitalWrite(relay, RELAY_OFF);
   }
}

void MMintensity(String MM){
   char carray[MM.length() + 1];
   MM.toCharArray(carray,sizeof(carray));
   
   if (atof(carray) < 3)
   {
      strIntensity = "Unnoticeable" ;
   } else if (
   atof(carray) <= 4){
      strIntensity = "Weak" ;
   } else if (
   atof(carray) <= 5){
      strIntensity = "Light" ;
   } else if (
   atof(carray) <= 6){
      strIntensity = "Moderate" ;
   } else if (
   atof(carray) <= 7){
      strIntensity = "Strong" ;
   } else if (
   atof(carray) > 7){
      strIntensity = "Severe" ;
   }
   //Serial.println(strIntensity);
}


void OLEDDisplay() {
   lcd.clear();
   lcd.setFontSize(FONT_SIZE_SMALL);
   lcd.print("MM:");
   lcd.setFontSize(FONT_SIZE_MEDIUM);
   lcd.print(strMagnitude);
   lcd.setFontSize(FONT_SIZE_SMALL);
   lcd.setCursor(65,0);
   lcd.println(strTime);
   lcd.setCursor(60,1);
   lcd.println(strDate);
   lcd.setCursor(0,3);
   lcd.print("LN:");
   lcd.setCursor(20,3);
   lcd.println(strLocation);
   lcd.setCursor(0,6);
   lcd.setFontSize(FONT_SIZE_MEDIUM);
   lcd.println(strIntensity);
   delay(1000);
}

- Wed Jun 01, 2016 3:30 am #48372 I've done something like this. It uses the ESP8266 to get RSS/XML/HTML data, then sends it to an Arduino by serial to be displayed on an LCD. The project is here: http://www.variableindustries.com/web-to-lcd/

Variable Industries
www.varind.com