News Ticker for ESP32

#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>
#include <U8g2lib.h>

// WiFi credentials
const char* ssid = "";
const char* password = "";

// RSS Feed URLs
const char* newsUrls[] = {
"https://www.nu.nl/rss/Algemeen",
"https://feeds.bbci.co.uk/news/rss.xml",
//"feeds.nos.nl/nosnieuwsalgemeen",
"https://feeds.skynews.com/feeds/rss/home.xml",
"https://www.reutersagency.com/feed/?best-types=reuters-news-first&post_type=best"
};
const int numFeeds = 4;
int currentFeed = 0;

// SH1106 Display
U8G2_SH1106_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);

String headlines[40];
int numHeadlines = 0;
int xOffset = 128; // Start position off the right side of the display
int speed = 2.5; // Scrolling speed

void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected!");

u8g2.begin();
u8g2.setFont(u8g2_font_courR14_tf); // Use font with Latin-1 support
fetchHeadlines();
}

void loop() {
u8g2.clearBuffer();

// Draw all headlines horizontally
int currentX = xOffset;
for (int i = 0; i < numHeadlines; i++) {
u8g2.drawUTF8(currentX, 40, headlines[i].c_str());
currentX += u8g2.getUTF8Width(headlines[i].c_str()) + 10;
}

u8g2.sendBuffer();

xOffset -= speed;
if (xOffset < -getTotalWidth() - 10) { // Check if all headlines have scrolled off
xOffset = 128; // Reset position
currentFeed = (currentFeed + 1) % numFeeds; // Switch feed
fetchHeadlines();
}

delay(1);
}

void fetchHeadlines() {
WiFiClientSecure client;
client.setInsecure(); // Ignore SSL certificate validation
HTTPClient http;

if (http.begin(client, newsUrls[currentFeed])) {
int httpCode = http.GET();
if (httpCode > 0) {
String payload = http.getString();
parseRSS(payload);
}
http.end();
}
}

void parseRSS(String xml) {
numHeadlines = 0;
int pos = 0;
while ((pos = xml.indexOf("<title>", pos)) >= 0 && numHeadlines < 40) {
int endPos = xml.indexOf("</title>", pos);
if (endPos > pos) {
String headline = xml.substring(pos + 7, endPos);

// Remove CDATA tags
headline.replace("<![CDATA[", "");
headline.replace("]]>", "");

// Ensure UTF-8 encoding (needed for U8g2)
headline = convertToUTF8(headline);

if (numHeadlines > 0) {
headlines[numHeadlines] = "-|- " + headline;
} else {
headlines[numHeadlines] = headline;
}

numHeadlines++;
}
pos = endPos + 8;
}
}

// Function to ensure proper UTF-8 encoding
String convertToUTF8(String str) {
str.replace("£", "\xC2\xA3"); // Pound sign
str.replace("é", "\xC3\xA9"); // é
str.replace("ë", "\xC3\xAB"); // ë
str.replace("ï", "\xC3\xAF"); // ï
return str;
}

// Function to calculate the total width of all headlines combined
int getTotalWidth() {
int totalWidth = 0;
for (int i = 0; i < numHeadlines; i++) {
totalWidth += u8g2.getUTF8Width(headlines[i].c_str()) + 10;
}
return totalWidth;
}