From af6c2fb0585067d83822770b97a9439877137fbc Mon Sep 17 00:00:00 2001
From: Klaus-Uwe Mitterer <git@kumi.email>
Date: Fri, 28 May 2021 15:20:06 +0200
Subject: [PATCH] Initial commit

---
 esp32indicator.ino | 76 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 esp32indicator.ino

diff --git a/esp32indicator.ino b/esp32indicator.ino
new file mode 100644
index 0000000..1641559
--- /dev/null
+++ b/esp32indicator.ino
@@ -0,0 +1,76 @@
+#include <WiFi.h>
+#include <NTPClient.h>
+#include <WiFiUdp.h>
+
+const char* ssid = "Your WiFi SSID";
+const char* password = "Your WiFi Password";
+
+const int notify_hour = 20;
+const int notify_minute = 0;
+
+const int local_time_offset = 2 * 3600;
+
+const int led = 1;
+
+bool flashing = false;
+bool skip = false;
+
+WiFiUDP ntpUDP;
+NTPClient timeClient(ntpUDP);
+
+bool check_time() {
+   while(!timeClient.update()) {
+    timeClient.forceUpdate();
+  }
+
+  int hours = timeClient.getHours();
+  int minutes = timeClient.getMinutes();
+
+  if (skip && hours < notify_hour) skip = false;
+
+  if (!skip && (hours > notify_hour || (hours == notify_hour && minutes >= notify_minute))) {
+    return true;
+  }
+  
+  return false;
+}
+
+void setup() {
+  // Serial.begin(115200);
+  pinMode(led, OUTPUT);
+  digitalWrite(led, HIGH);
+
+  // Serial.print("Connecting to ");
+  // Serial.println(ssid);
+  WiFi.begin(ssid, password);
+  
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    // Serial.print(".");
+  }
+
+  /* Serial.println("");
+  Serial.println("WiFi connected.");
+  Serial.print("IP address: ");
+  Serial.println(WiFi.localIP()); */
+
+  timeClient.begin();
+  timeClient.setTimeOffset(local_time_offset);
+
+  if (check_time()) skip = true;
+}
+
+void loop() {
+  if (!flashing) {
+    flashing = check_time();
+    if (!flashing) delay(30000);
+    return;
+  }
+
+  if (!skip) {
+    digitalWrite(led, LOW);
+    delay(500);
+    digitalWrite(led, HIGH);
+    delay(500);
+  }
+}