From 45df5179b8df1968d4b4be35cdb181ace701c2b8 Mon Sep 17 00:00:00 2001
From: Blue Fox <bluefox@privacynerd.de>
Date: Sun, 21 Aug 2022 19:21:56 +0200
Subject: [PATCH] Now using NTP server for getting time.

---
 http_grab.ino    | 16 ++++++++++++++++
 losungepaper.ino |  9 +++++++--
 wifi.ino         |  5 +++++
 3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/http_grab.ino b/http_grab.ino
index 1846ee5..c808200 100755
--- a/http_grab.ino
+++ b/http_grab.ino
@@ -28,6 +28,22 @@ String getHTML(String url) {
   }
   return result;
 }
+String getHTML() {  // gets the date and year from time.h library
+  struct tm timeinfo;
+  char dayInMonth[3];
+  char month[3];
+  char year[5];
+
+  if(!getLocalTime(&timeinfo)){
+    Serial.println("Failed to obtain time");
+    return "";
+  }
+  strftime(dayInMonth,3, "%d", &timeinfo);
+  strftime(month,3, "%m", &timeinfo);
+  strftime(year,5, "%Y", &timeinfo);
+
+  return getHTML(String("https://www.losungen.de/fileadmin/media-losungen/heute/") + String(year) + String("/") + String(month) + String(dayInMonth) + String(".html"));
+}
 
 String getLosungFromHTML(String html) {
   int losungBeginIndex = html.indexOf(textBeginString)+textBeginString.length();
diff --git a/losungepaper.ino b/losungepaper.ino
index 7d254e4..0f0f3c9 100755
--- a/losungepaper.ino
+++ b/losungepaper.ino
@@ -11,6 +11,11 @@ Epd epd;
 char wiFiSSID[] = "SSID";  // SSID of your network
 char wiFiPSK[] = "PRE-SHARED KEY";  //password of your WPA Network
 
+// NTP (Network Time Protocol)
+const String ntpServer = "pool.ntp.org";  // address of ntp server; may also be your router, other local service, etc.
+const long  gmtOffset_sec = 3600;  // for localization (gmt = greenwich mean time); in germany: 3600
+const int   daylightOffset_sec = 3600;  // for daylight saving
+
 // style of the frame shown
 sFONT TITLE_FONT = Font20;
 char TITLE_TEXT[] = "Losung heute";
@@ -33,8 +38,8 @@ void setup() {
   Serial.println("[INFO] Initialized e-Paper!");
 
   connectWiFi();
-  String html = getHTML("https://www.losungen.de/fileadmin/media-losungen/heute/2022/0821.html");
-  
+  String html = getHTML();
+
   showDailyText(getLosungFromHTML(html), getLehrtextFromHTML(html), getLosungSourceFromHTML(html), getLehrtextSourceFromHTML(html));
 }
 
diff --git a/wifi.ino b/wifi.ino
index d249d15..fe89f14 100755
--- a/wifi.ino
+++ b/wifi.ino
@@ -1,4 +1,5 @@
 #include <WiFi.h>
+#include "time.h"
 
 void connectWiFi() {  // connect to the wifi with the above defined credentials
   if(WiFi.status() == WL_CONNECTED) { return; }  // return if not connected
@@ -11,5 +12,9 @@ void connectWiFi() {  // connect to the wifi with the above defined credentials
   Serial.printf("[WiFi] Connected to WiFi \"%s\", got IP-Adress ", wiFiSSID);
   Serial.println(WiFi.localIP());
 
+  Serial.println("[NTP] Getting time...");
+  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer.c_str());
+  Serial.println("[NTP] Got time.");
+
   return;
 }
\ No newline at end of file