/* Sketch switches a consumer on for 30 seconds at a specific time. 
The circuit is designed for battery operation. 
ESP32-C3 is mainly in sleep mode */

#include <WiFi.h>

#define NTP_SERVER "de.pool.ntp.org"
#define TZ_INFO "WEST-1DWEST-2,M3.5.0/02:00:00,M10.5.0/03:00:00" // Western European Time
struct tm local;

#define PowerPin 8
String Ausfuerungszeit = "13:45";

const char* ssid = "Wokwi-GUEST";
const char* password = "";

void ErsteStart()
{
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.println("Verbinde mit WLAN");
  if (WiFi.waitForConnectResult() != WL_CONNECTED)
  {
    Serial.printf("WiFi Failed!\n");
    Serial.flush(); 
    WiFi.mode(WIFI_OFF);
    esp_sleep_enable_timer_wakeup(100 * 1000000UL);
      esp_deep_sleep_start();                       // Starte Deep Sleep
      delay(3000);
  }


  Serial.println("");
  Serial.print("IP Addresse: ");
  Serial.println(WiFi.localIP());
  Serial.println("Hole NTP Zeit");
  configTzTime(TZ_INFO, NTP_SERVER); // ESP32 Systemzeit mit NTP Synchronisieren
  getLocalTime(&local, 10000);      // Versuche 10 s zu Synchronisieren
  Serial.println(&local, "Datum: %d.%m.%y  Zeit: %H:%M:%S");
  WiFi.mode(WIFI_OFF);
}


String split(String s, char parser, int index) {
  String rs="";
  int parserIndex = index;
  int parserCnt=0;
  int rFromIndex=0, rToIndex=-1;
  while (index >= parserCnt) {
    rFromIndex = rToIndex+1;
    rToIndex = s.indexOf(parser,rFromIndex);
    if (index == parserCnt) {
      if (rToIndex == 0 || rToIndex == -1) return "";
      return s.substring(rFromIndex,rToIndex);
    } else parserCnt++;
  }
  return rs;
}

unsigned int TimeToSek(String Zeit)
{
int TeilerPos1= Zeit.indexOf(':',0); 
String tmp= Zeit.substring(0,TeilerPos1);
unsigned int Stunden = tmp.toInt();
tmp = Zeit.substring(TeilerPos1+1, Zeit.length());
unsigned int Minuten = tmp.toInt();
return Stunden*60*60 + Minuten*60;
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Start!");
  setenv("TZ", TZ_INFO, 1);             // Zeitzone  muss nach dem reset neu eingestellt werden
  tzset();
  if (!getLocalTime(&local, 10))
  {
    Serial.println("RTC-Zeit nicht eingestellt");
    ErsteStart();
  }
Serial.println(&local, "Datum: %d.%m.%y  Zeit: %H:%M:%S");
char s[6];
strftime(s, sizeof(s), "%H:%M", &local);
 unsigned int SekundenJetzt = TimeToSek((String)s);
 unsigned int SekundenAusfuerungszeit = TimeToSek(Ausfuerungszeit);
uint64_t SchaltenInSek=0;
if (SekundenAusfuerungszeit > SekundenJetzt) 
{
SchaltenInSek= SekundenAusfuerungszeit- SekundenJetzt;
}
else
{
  SchaltenInSek = 86400- (SekundenJetzt - SekundenAusfuerungszeit);
}
  pinMode(PowerPin, OUTPUT);
  digitalWrite(PowerPin, LOW);
  delay(30 * 1000);
  digitalWrite(PowerPin, HIGH);
  esp_sleep_enable_timer_wakeup(SchaltenInSek * 1000000UL);
  Serial.println("Deep Sleep - Gehe schlafen \r\n \r\n");
  delay(2000);
  Serial.flush(); 
esp_deep_sleep_start();
Serial.println("This will never be printed");
delay(500);
}

void loop() {
  // put your main code here, to run repeatedly:
  delay(10); // this speeds up the simulation
}