commit 7dbb880056d0951c3bebc11ef51e51cba9088728
Author: alban <git@albancrommer.com>
Date:   Sat Oct 28 17:53:13 2023 +0200

    [init]

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2c1e4b0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# ESP32 Electrical switch 
+
+WIP
diff --git a/esp32-electrical-switch.ino b/esp32-electrical-switch.ino
new file mode 100644
index 0000000..f165e6e
--- /dev/null
+++ b/esp32-electrical-switch.ino
@@ -0,0 +1,228 @@
+#include "esp_system.h"
+#include "sntp.h"
+#include "time.h"
+#include <WiFi.h>
+#include <WiFiUdp.h>
+#include <Preferences.h>
+#include "scheduler.h"
+#include "scheduler_prefs.h"
+
+
+// Init const and global objects
+
+// PREFRENCES
+Preferences preferences;
+#define RW_MODE false
+#define RO_MODE true
+
+// WIFI
+const char* ssid                = "Wokwi-GUEST";
+const char* password            = "";
+
+// NTP
+bool sntp_initialized           = false;
+const char* ntpServer1          = "pool.ntp.org";
+const char* ntpServer2          = "time.nist.gov";
+const long  gmtOffset_sec       = 2 * 3600;  // GMT + 2
+const int   daylightOffset_sec  = 0;
+
+// TIMER
+hw_timer_t*timer_main           = NULL;
+uint32_t timer_interval         = 3000000;
+uint16_t timer_interval_in_secs = timer_interval / 1000000;
+;
+
+// SCHEDULER
+uint8_t current_hour            = HOUR_DEFAULT;
+uint8_t current_minute          = MINUTE_DEFAULT;
+uint8_t current_second          = 0;
+uint32_t current_ts             = 0;
+uint32_t next_event_ts          = 0;
+uint16_t scheduler_1[24]        = {A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60,A60};
+uint16_t scheduler_2[24]        = {A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00,A00};
+uint16_t* scheduler_list[]      = {
+  scheduler_1,
+  scheduler_2
+  };
+
+// PINS
+unsigned int PIN_1 = 2;
+unsigned int PIN_2 = 4;
+unsigned int pin_list[2] = {
+  PIN_1,
+  PIN_2
+  };
+
+// Local functions
+
+// Time helper
+uint32_t get_timestamp( uint8_t hour, uint8_t minute, uint8_t second){
+  return ( 3600 * hour  + 60 * minute + second) % 86400;
+}
+
+bool event_keep_waiting( uint32_t current_ts, uint32_t event_ts ){
+
+  // basic case
+  // ts: 11h 41m 11s
+  // ev: 11h 44m 0s
+  // ts < ev => TRUE
+  if ( current_ts < event_ts ){
+    return true;
+  }
+  // if time looped at midnight
+  // ts: 23h 57m 21s
+  // ev: 0h 1m 0s
+  // ts > ev => TRUE (for high to very low values )
+  if( (current_ts - event_ts) > 600 && event_ts < 300 ) {
+    return true;
+  }
+  // ts: 11h 44m 11s
+  // ev: 11h 44m 0s
+  // ts > ev => FALSE
+  return false;
+}
+
+
+// NTP Callback
+void timeavailable(struct timeval *t)
+{
+  Serial.println("NTP::Got time adjustment from NTP!");
+  sntp_initialized = true;
+  return;
+}
+
+// TIMER Callback
+void IRAM_ATTR onTimer(){
+
+    Serial.println("onTimer::run");
+  // Get the current time via NTP, or downgrade
+  if ( sntp_initialized ){
+    struct tm timeinfo;
+    time_t now;
+    time(&now);
+    localtime_r(&now, &timeinfo);
+    current_hour = timeinfo.tm_hour;
+    current_minute = timeinfo.tm_min;
+    current_second = timeinfo.tm_sec;
+  // If no NTP clock
+  }else{
+
+    Serial.println("onTimer::NO NTP");
+    current_second += timer_interval_in_secs;
+    if(current_second >= 60) {
+      current_second = 0;
+      current_minute += 1;
+      if(current_minute >= 60) {
+        current_minute = 0;
+        current_hour += 1;
+        if(current_hour >=  24) {
+          current_hour = 0;
+        }
+      }
+    }
+
+  }
+
+  // If not expected to run exit
+  current_ts = get_timestamp( current_hour, current_minute, current_second );
+  Serial.printf("onTimer::check event %d %d\n", current_ts, next_event_ts);
+  if( event_keep_waiting( current_ts, next_event_ts  ) ){
+    return;
+  }
+
+  // Set the next target
+  next_event_ts = get_timestamp( current_hour, current_minute + EVENT_INC_MINUTE, current_second );
+  Serial.println("Reconfigure the Relays!");
+
+  // Run the relays reconfiguration
+  for ( int i = 0; i < 2; i++ ) {
+    // Get a pointer to the current array
+    uint16_t* scheduler         = scheduler_list[i];
+    unsigned int pin            = pin_list[i];
+    // Set the expected status
+    uint8_t minutes_by_5        = (current_minute / 5);
+    uint16_t hourly_12_values   = scheduler[current_hour];
+    // Serial.printf("Check hour(%d) >> minutes(%d x 5)\n", hourly_12_values, minutes_by_5);
+
+    char buffer[40];
+
+    if (( hourly_12_values >> minutes_by_5 ) & 1) {
+      digitalWrite(pin, HIGH);
+      sprintf (buffer, "Pin %d is up ", pin);
+    } else {
+      digitalWrite(pin, LOW);
+      sprintf (buffer, "Pin %d is down ", pin);
+    }
+    Serial.println(buffer);    // Get the expected status
+  }
+
+  Serial.println("Reconfiguration over");
+  return;
+}
+
+void setup(){
+
+  // HARDWARE
+  Serial.begin(115200);
+  delay(1000);
+  Serial.println("Starting.");
+  pinMode(PIN_1, OUTPUT);
+  pinMode(PIN_2, OUTPUT);
+
+  // PREFERENCES
+  Serial.println("Setup::PREFERENCES");
+  preferences.begin(PREF_NAMESPACE, RW_MODE);
+  bool pref_init = preferences.isKey("nvsInit");
+  if (pref_init == false) {
+    preferences.putBytes(RELAY_1_SCHEDULE, scheduler_1_default, sizeof(scheduler_1_default));
+    preferences.putBytes(RELAY_2_SCHEDULE, scheduler_2_default, sizeof(scheduler_2_default));
+    /// ... more to come
+  }
+  /* Huh... This crashes wokwi
+  preferences.getBytes(RELAY_1_SCHEDULE, scheduler_1, preferences.getBytesLength(RELAY_1_SCHEDULE));
+  preferences.getBytes(RELAY_2_SCHEDULE, scheduler_2, preferences.getBytesLength(RELAY_2_SCHEDULE));
+  */
+  preferences.end();
+
+  // WIFI
+  Serial.println("Setup::WIFI");
+  Serial.printf("Connecting to %s ", ssid);
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.print("Connect to IP Address: ");
+  Serial.print("http://");
+  Serial.println(WiFi.localIP());
+
+  // TIMER
+  Serial.println("Setup::Timer");
+  timer_main = timerBegin(0, 80, true);
+  timerAttachInterrupt(timer_main, &onTimer, true);
+  timerAlarmWrite(timer_main, timer_interval, true);
+  timerAlarmEnable(timer_main);
+
+  // NTP
+  Serial.println("Setup::NTP");
+  sntp_set_time_sync_notification_cb(timeavailable);
+  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer1, ntpServer2);
+  delay(5000);
+
+  // SCHEDULER
+  Serial.println("Setup::SCHEDULER");
+  next_event_ts = get_timestamp( HOUR_DEFAULT, MINUTE_DEFAULT + EVENT_INC_MINUTE, 0 );
+
+
+  // HTTP
+  Serial.println("Setup::HTTP");
+  // Todo
+}
+void loop(){
+
+  Serial.println("Loop::Enter");
+
+  delay(1000);
+
+
+nc  }
diff --git a/preferences.ino b/preferences.ino
new file mode 100644
index 0000000..03b2eb7
--- /dev/null
+++ b/preferences.ino
@@ -0,0 +1,83 @@
+#include <Preferences.h>
+
+// See https://docs.espressif.com/projects/arduino-esp32/en/latest/tutorials/preferences.html
+Preferences preferences;
+
+
+
+String S1 = "String numéro 1";
+String S2 = "String numéro 2";
+String S3 = "String numéro 3";
+String S4 = "String numéro 4";
+
+const byte tailleMax = 30;
+char cs1[tailleMax + 1] = "c-string numéro 1";
+char cs2[tailleMax + 1] = "c-string numéro 2";
+char cs3[tailleMax + 1] = "c-string numéro 3";
+char cs4[tailleMax + 1] = "c-string numéro 4";
+
+void setup() {
+  Serial.begin(115200);
+
+  preferences.begin("my-app", false);
+
+  // on sauve tout
+  preferences.putString("S1", S1);
+  preferences.putString("S2", S2);
+  preferences.putString("S3", S3);
+  preferences.putString("S4", S4);
+
+  preferences.putBytes("cs1", cs1, tailleMax + 1);
+  preferences.putBytes("cs2", cs2, tailleMax + 1);
+  preferences.putBytes("cs3", cs3, tailleMax + 1);
+  preferences.putBytes("cs4", cs4, tailleMax + 1);
+
+  String lectureS1 = "";
+  String lectureS2 = "";
+  String lectureS3 = "";;
+  String lectureS4 = "";
+
+  char lectureCs1[tailleMax + 1] = {};
+  char lectureCs2[tailleMax + 1] = {};
+  char lectureCs3[tailleMax + 1] = {};
+  char lectureCs4[tailleMax + 1] = {};
+
+
+  Serial.println("AVANT LECTURE");
+  Serial.print("lectureS1 = "); Serial.println(lectureS1);
+  Serial.print("lectureS2 = "); Serial.println(lectureS2);
+  Serial.print("lectureS3 = "); Serial.println(lectureS3);
+  Serial.print("lectureS4 = "); Serial.println(lectureS4);
+
+  Serial.print("lectureCs1 = "); Serial.println(lectureCs1);
+  Serial.print("lectureCs2 = "); Serial.println(lectureCs2);
+  Serial.print("lectureCs3 = "); Serial.println(lectureCs3);
+  Serial.print("lectureCs4 = "); Serial.println(lectureCs4);
+
+  // on relit tout
+
+  lectureS1 = preferences.getString("S1", "");
+  lectureS2 = preferences.getString("S2", "");
+  lectureS3 = preferences.getString("S3", "");
+  lectureS4 = preferences.getString("S4", "");
+
+  preferences.getBytes("cs1", lectureCs1, tailleMax + 1);
+  preferences.getBytes("cs2", lectureCs2, tailleMax + 1);
+  preferences.getBytes("cs3", lectureCs3, tailleMax + 1);
+  preferences.getBytes("cs4", lectureCs4, tailleMax + 1);
+
+  Serial.println("\n\nAPRES LECTURE");
+  Serial.print("lectureS1 = "); Serial.println(lectureS1);
+  Serial.print("lectureS2 = "); Serial.println(lectureS2);
+  Serial.print("lectureS3 = "); Serial.println(lectureS3);
+  Serial.print("lectureS4 = "); Serial.println(lectureS4);
+
+  Serial.print("lectureCs1 = "); Serial.println(lectureCs1);
+  Serial.print("lectureCs2 = "); Serial.println(lectureCs2);
+  Serial.print("lectureCs3 = "); Serial.println(lectureCs3);
+  Serial.print("lectureCs4 = "); Serial.println(lectureCs4);
+
+  preferences.end();
+}
+
+void loop() {}
diff --git a/scheduler.h b/scheduler.h
new file mode 100644
index 0000000..c70d601
--- /dev/null
+++ b/scheduler.h
@@ -0,0 +1,68 @@
+
+#define A00         0b000000000000
+#define A60         0b111111111111
+#define HALF_HOUR   0b000000111111
+#define EVERY_2     0b010101010101
+#define EVERY_2_INV 0b101010101010
+
+#define HOUR_DEFAULT 16
+#define MINUTE_DEFAULT 41
+#define EVENT_INC_MINUTE 5
+
+// our scheduler loop every 24 hour.
+// one hour is represented by 1 unsigned int
+// each bit of the hour represent one BI_MINUTE.
+// the output of the scheduler is ON if one bit is set, OFF otherwise.
+unsigned int scheduler_1_default[24] = {
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+};
+unsigned int scheduler_2_default[24] = {
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+  EVERY_2,
+  EVERY_2_INV,
+};
+
diff --git a/scheduler_prefs.h b/scheduler_prefs.h
new file mode 100644
index 0000000..14da9d6
--- /dev/null
+++ b/scheduler_prefs.h
@@ -0,0 +1,11 @@
+
+const char* PREF_NAMESPACE    =  "rXsch";
+const char* RELAY_1_SCHEDULE  =  "r1sch";
+const char* RELAY_2_SCHEDULE  =  "r2sch";
+const char* RELAY_3_SCHEDULE  =  "r3sch";
+const char* RELAY_4_SCHEDULE  =  "r4sch";
+const char* RELAY_5_SCHEDULE  =  "r5sch";
+const char* RELAY_6_SCHEDULE  =  "r6sch";
+const char* RELAY_7_SCHEDULE  =  "r7sch";
+const char* RELAY_8_SCHEDULE  =  "r8sch";
+
diff --git a/sources/biminute-relay.ino b/sources/biminute-relay.ino
new file mode 100644
index 0000000..5f184c2
--- /dev/null
+++ b/sources/biminute-relay.ino
@@ -0,0 +1,238 @@
+#include "esp_system.h"
+#include "sntp.h"
+#include "time.h"
+#include <WiFi.h>
+#include <WiFiUdp.h>
+#include <Preferences.h>
+#include "scheduler.h"
+#include "scheduler_prefs.h"
+
+
+// Init const and global objects
+
+// PREFRENCES
+Preferences preferences;
+#define RW_MODE false
+#define RO_MODE true
+
+// WIFI
+const char* ssid       = "Wokwi-GUEST";
+const char* password   = "";
+
+// NTP
+const char* ntpServer1 = "pool.ntp.org";
+const char* ntpServer2 = "time.nist.gov";
+const long  gmtOffset_sec = 2 * 3600;  // GMT + 2
+const int   daylightOffset_sec = 0;
+
+// TIMER
+hw_timer_t*timer_main = NULL;
+uint32_t timer_interval = 3000000;
+uint16_t timer_interval_in_secs = timer_interval / 1000000;
+;
+
+// SCHEDULER
+uint8_t current_hour = HOUR_DEFAULT;
+uint8_t current_minute = MINUTE_DEFAULT;
+uint8_t current_second = 0;
+uint32_t current_ts = 0;
+uint32_t next_event_ts = 0;
+uint8_t scheduler_1[24] = {1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};
+uint8_t scheduler_2[24] = {1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+uint8_t* scheduler_list[] = {
+  scheduler_1, scheduler_2
+  };
+
+// PINS
+unsigned int PIN_1 = 2;
+unsigned int PIN_2 = 4;
+unsigned int pin_list[2] = { PIN_1, PIN_2 };
+
+// MISC
+
+char buffer[40];
+
+// Local functions
+
+// Time helper
+uint32_t get_timestamp( uint8_t hour, uint8_t minute, uint8_t second){
+  return ( 3600 * hour  + 60 * minute + second) % 86400;
+}
+
+bool event_keep_waiting( uint32_t current_ts, uint32_t event_ts ){
+
+  // basic case
+  // ts: 11h 41m 11s
+  // ev: 11h 44m 0s
+  // ts < ev => TRUE
+
+  // ts: 11h 44m 11s
+  // ev: 11h 44m 0s
+  // ts > ev => FALSE
+
+  // if time looped at midnight
+  // ts: 23h 57m 21s
+  // ev: 0h 1m 0s => 60
+  // ts > ev => TRUE
+
+
+  // Simple case
+  if ( current_ts < event_ts ){
+    return true;
+  }
+  if( (current_ts - event_ts) > 600 && event_ts < 300 ) {
+    return true;
+  }
+  return false;
+}
+
+
+// NTP helper
+void setLocalTime()
+{
+  struct tm timeinfo;
+  if (!getLocalTime(&timeinfo)){
+    Serial.println("No time available (yet)");
+    return;
+  }
+  current_hour = timeinfo.tm_hour;
+  current_minute = timeinfo.tm_min;
+  current_second = timeinfo.tm_sec;
+  Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
+}
+
+// NTP Callback
+void timeavailable(struct timeval *t)
+{
+  Serial.println("Got time adjustment from NTP!");
+
+  setLocalTime();
+}
+
+// TIMER Callback
+void IRAM_ATTR onTimer(){
+
+
+  /*
+  struct tm timeinfo;
+  // Get the current time via NTP, or downgrade
+  if (getLocalTime(&timeinfo)){
+    Serial.println("onTimer::Got local time");
+    current_hour = timeinfo.tm_hour;
+    current_minute = timeinfo.tm_min;
+    current_second = timeinfo.tm_sec;
+  // If no NTP clock
+  }else{
+    */
+    Serial.println("onTimer::NO NTP");
+    current_second += timer_interval_in_secs;
+    if(current_second >= 60) {
+      current_second = 0;
+      current_minute += 1;
+      if(current_minute >= 60) {
+        current_minute = 0;
+        current_hour += 1;
+        if(current_hour >=  24) {
+          current_hour = 0;
+        }
+      }
+    }
+    /*
+  }
+  */
+  // If not expected to run exit
+  current_ts = get_timestamp( current_hour, current_minute, current_second );
+  Serial.printf("onTimer::check event %d %d\n", current_ts, next_event_ts);
+  if( event_keep_waiting( current_ts, next_event_ts  ) ){
+    return;
+  }
+
+  // Set the next target
+  next_event_ts = get_timestamp( current_hour, current_minute + EVENT_INC_MINUTE, current_second );
+  Serial.println("Reconfigure the Relays!");
+
+  // Run the relays reconfiguration
+  for ( int i = 0; i < 2; i++ ) {
+    // Get a pointer to the current array
+    uint8_t* scheduler  = scheduler_list[i];
+    unsigned int pin    = pin_list[i];
+    // Set the expected status
+    uint8_t min_fivers  = (current_minute / 5);
+    uint8_t hour        = scheduler[current_hour];
+    Serial.printf("Check %d >> %d\n", hour, min_fivers);
+    if (( hour >> min_fivers ) & 1) {
+      digitalWrite(pin, HIGH);
+      sprintf (buffer, "Pin %d is up ", pin);
+    } else {
+      digitalWrite(pin, LOW);
+      sprintf (buffer, "Pin %d is down ", pin);
+    }
+    Serial.println(buffer);    // Get the expected status
+  }
+
+}
+
+void setup(){
+
+  // HARDWARE
+  Serial.begin(115200);
+  delay(1000);
+  Serial.println("Starting.");
+  pinMode(PIN_1, OUTPUT);
+  pinMode(PIN_2, OUTPUT);
+
+  // PREFERENCES
+  Serial.println("Setup::PREFERENCES");
+  preferences.begin(PREF_NAMESPACE, RW_MODE);
+  bool pref_init = preferences.isKey("nvsInit");
+  if (pref_init == false) {
+    preferences.putBytes(RELAY_1_SCHEDULE, scheduler_1_default, sizeof(scheduler_1_default));
+    preferences.putBytes(RELAY_2_SCHEDULE, scheduler_2_default, sizeof(scheduler_2_default));
+    /// ... more to come
+  }
+  /* Huh... This crashes wokwi
+  preferences.getBytes(RELAY_1_SCHEDULE, scheduler_1, preferences.getBytesLength(RELAY_1_SCHEDULE));
+  preferences.getBytes(RELAY_2_SCHEDULE, scheduler_2, preferences.getBytesLength(RELAY_2_SCHEDULE));
+  */
+  preferences.end();
+
+  // WIFI
+  Serial.println("Setup::WIFI");
+  Serial.printf("Connecting to %s ", ssid);
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.print("Connect to IP Address: ");
+  Serial.print("http://");
+  Serial.println(WiFi.localIP());
+
+  // TIMER
+  Serial.println("Setup::Timer");
+  timer_main = timerBegin(0, 80, true);
+  timerAttachInterrupt(timer_main, &onTimer, true);
+  timerAlarmWrite(timer_main, timer_interval, true);
+  timerAlarmEnable(timer_main);
+
+  // NTP
+  Serial.println("Setup::NTP");
+  sntp_set_time_sync_notification_cb(timeavailable);
+  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer1, ntpServer2);
+
+  // SCHEDULER
+  Serial.println("Setup::SCHEDULER");
+  next_event_ts = get_timestamp( HOUR_DEFAULT, MINUTE_DEFAULT + EVENT_INC_MINUTE, 0 );
+
+
+  // HTTP
+  Serial.println("Setup::HTTP");
+  // Todo
+}
+void loop(){
+
+  Serial.println("Loop::Enter");
+
+  delay(1000);
+
+}
diff --git a/sources/sam-http-server.ino b/sources/sam-http-server.ino
new file mode 100644
index 0000000..fe8c18c
--- /dev/null
+++ b/sources/sam-http-server.ino
@@ -0,0 +1,240 @@
+/*
+  ESP32 WiFi STA Mode
+  http:://www.electronicwings.com
+*/
+
+#include <WiFi.h>
+#include <NTPClient.h>
+#include <WiFiUdp.h>
+#include "esp_system.h"
+
+// For example purpose
+String formattedDate;
+
+// Define NTP Client to get time
+WiFiUDP ntpUDP;
+NTPClient timeClient(ntpUDP);
+
+// Timer conf
+const int wdtTimeout = 30;  //time in ms to trigger the watchdog
+hw_timer_t *timer = NULL;
+
+// Wifi conf
+const char* ssid = "Wokwi-GUEST";                 /*Enter Your SSID*/
+const char* password = ""; /*Enter Your Password*/
+WiFiServer server(80); /* Instance of WiFiServer with port number 80 */
+String request;
+
+bool L1 = false;
+bool L2 = false;
+bool L3 = false;
+bool L4 = false;
+bool L5 = false;
+bool L6 = false;
+bool L7 = false;
+bool L8 = false;
+
+String programme = "000000000000000000";
+
+WiFiClient client;
+
+void callback() {
+
+  Serial.print("Callback... ");
+}
+
+void setup() {
+  Serial.begin(9600);
+
+  Serial.print("Connecting to: ");
+  Serial.println(ssid);
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    Serial.print(".");
+    delay(100);
+  }
+  Serial.print("\n");
+  Serial.print("Connected to Wi-Fi ");
+  Serial.println(WiFi.SSID());
+  delay(1000);
+  server.begin(); /* Start the HTTP web Server */
+  Serial.print("Connect to IP Address: ");
+  Serial.print("http://");
+  Serial.println(WiFi.localIP());
+
+  timeClient.begin();
+  // Set offset time in seconds to adjust for your timezone, for example:
+  timeClient.setTimeOffset(7200);
+  timeClient.update();
+
+  timer = timerBegin(0, 80, true);                  //timer 0, div 80
+  timerAttachInterrupt(timer, &callback, true);  //attach callback
+  timerAlarmWrite(timer, wdtTimeout * 1000, false); //set time in us
+  timerAlarmEnable(timer);                          //enable interrupt
+
+
+}
+
+void html() {
+  client.println("HTTP/1.1 200 OK");
+  client.println("Content-Type: text/html");
+  client.println("Connection: close");
+  client.println();
+
+  client.println("<!DOCTYPE HTML>");
+  client.println("<html>");
+
+  client.println("<head>");
+  client.println("<meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
+  client.println("<link rel=\"icon\" href=\"data:,\">");
+  client.println("<style>");
+  client.println("html { font-family: Roboto; display: inline-block; margin: 0px auto; text-align: center;}");
+  client.println(".button {float:left;background-color: #4CAF50; border: none; color: white; padding: 15px 32px; text-align: center; text-decoration: none; display: inline-block; font-size: 16px; margin: 4px 2px; cursor: pointer;");
+  client.println("text-decoration: none; font-size: 25px; margin: 2px; cursor: pointer;}");
+  client.println(".button_ON {background-color: white; color: black; border: 2px solid #4CAF50;}");
+  client.println(".button_OFF {background-color: white; color: black; border: 2px solid #f44336;}");
+  client.println("</style>");
+  client.println("</head>");
+  client.println("<body>");
+  client.println("<h2>Programmation actuelle</h2>");
+  client.println("<h3>"+programme+"</h3>");
+  client.print("<form action=\"/PROG\n\" method=\"post\">");
+  client.print("<label>Modifier Programmation : <input type=\"text\" name=\"progo\" id=\"toto\" value=\"" + programme + "\"/></label>");
+  client.print("<input type=\"submit\" /></form>");
+  client.println("<h2>Prises Programm&eacute;es</h2>");
+
+
+  if (L1) {
+    client.print("<p><a href=\"/L1\n\"><button class=\"button button_ON\">1 ON</button></a></p>");
+  } else {
+    client.print("<p><a href=\"/L1\n\"><button class=\"button button_OFF\">1 OFF</button></a></p>");
+  }
+
+  if (L2) {
+    client.print("<p><a href=\"/L2\n\"><button class=\"button button_ON\">2 ON</button></a></p>");
+  } else {
+    client.print("<p><a href=\"/L2\n\"><button class=\"button button_OFF\">2 OFF</button></a></p>");
+  }
+  if (L3) {
+    client.print("<p><a href=\"/L3\n\"><button class=\"button button_ON\">3 ON</button></a></p>");
+  } else {
+    client.print("<p><a href=\"/L3\n\"><button class=\"button button_OFF\">3 OFF</button></a></p>");
+  }
+
+  if (L4) {
+    client.print("<p><a href=\"/L4\n\"><button class=\"button button_ON\">4 ON</button></a></p>");
+  } else {
+    client.print("<p><a href=\"/L4\n\"><button class=\"button button_OFF\">4 OFF</button></a></p>");
+  }
+  if (L5) {
+    client.print("<p><a href=\"/L5\n\"><button class=\"button button_ON\">5 ON</button></a></p>");
+  } else {
+    client.print("<p><a href=\"/L5\n\"><button class=\"button button_OFF\">5 OFF</button></a></p>");
+  }
+
+  if (L6) {
+    client.print("<p><a href=\"/L6\n\"><button class=\"button button_ON\">6 ON</button></a></p>");
+  } else {
+    client.print("<p><a href=\"/L6\n\"><button class=\"button button_OFF\">6 OFF</button></a></p>");
+  }
+  if (L7) {
+    client.print("<p><a href=\"/L7\n\"><button class=\"button button_ON\">7 ON</button></a></p>");
+  } else {
+    client.print("<p><a href=\"/L7\n\"><button class=\"button button_OFF\">7 OFF</button></a></p>");
+  }
+
+  if (L8) {
+    client.print("<p><a href=\"/L8\n\"><button class=\"button button_ON\">8 ON</button></a></p>");
+  } else {
+    client.print("<p><a href=\"/L8\n\"><button class=\"button button_OFF\">8 OFF</button></a></p>");
+  }
+
+  client.println("</body>");
+  client.println("</html>");
+}
+
+void loop() {
+
+
+  formattedDate = timeClient.getFormattedTime();
+  Serial.println(formattedDate);
+
+  timerWrite(timer, 0); //reset timer (feed watchdog)
+  long loopTime = millis();
+
+
+
+/*
+  // Extract date
+  int splitT = formattedDate.indexOf("T");
+  dayStamp = formattedDate.substring(0, splitT);
+  Serial.print("DATE: ");
+  Serial.println(dayStamp);
+  // Extract time
+  timeStamp = formattedDate.substring(splitT+1, formattedDate.length()-1);
+  Serial.print("HOUR: ");
+  Serial.println(timeStamp);
+  */
+  delay(1000);
+/*
+  client = server.available();
+  if (!client) {
+    return;
+  }
+
+  while (client.connected()) {
+    if (client.available()) {
+      char c = client.read();
+
+
+      request += c;
+
+      if (c == '\n') {
+        String postres = client.readString();
+        int indp = postres.indexOf("progo=")+6;
+        Serial.println(postres);
+        Serial.println(request);
+
+
+       if (request.indexOf("POST /PROG") != -1) {
+         Serial.println("go");
+          programme =postres.substring(indp);
+        }
+        if (request.indexOf("GET /L1") != -1) {
+          L1 = !L1;
+        }
+        if (request.indexOf("GET /L2") != -1) {
+          L2 = !L2;
+        }
+        if (request.indexOf("GET /L3") != -1) {
+          L3 = !L3;
+        }
+        if (request.indexOf("GET /L4") != -1) {
+          L4 = !L4;
+        }
+
+        if (request.indexOf("GET /L5") != -1) {
+          L5 = !L5;
+        }
+        if (request.indexOf("GET /L6") != -1) {
+          L6 = !L6;
+        }
+        if (request.indexOf("GET /L7") != -1) {
+          L7 = !L7;
+        }
+        if (request.indexOf("GET /L8") != -1) {
+          L8 = !L8;
+        }
+
+        html();
+        break;
+      }
+    }
+  }
+
+  delay(1);
+  request = "";
+  client.stop();
+  */
+}
diff --git a/sources/sntp.ino b/sources/sntp.ino
new file mode 100644
index 0000000..43d3bd4
--- /dev/null
+++ b/sources/sntp.ino
@@ -0,0 +1,56 @@
+#include "esp_system.h"
+#include "sntp.h"
+#include "time.h"
+#include <WiFi.h>
+#include <WiFiUdp.h>
+
+const char* ssid       = "Wokwi-GUEST";
+const char* password   = "";
+
+const char* ntpServer1 = "pool.ntp.org";
+const char* ntpServer2 = "time.nist.gov";
+const long  gmtOffset_sec = 2 * 3600;  // GMT + 2
+const int   daylightOffset_sec = 0;
+
+void printLocalTime()
+{
+  struct tm timeinfo;
+  if (!getLocalTime(&timeinfo)){
+    Serial.println("No time available (yet)");
+    return;
+  }
+  Serial.println(&timeinfo, "%A, %B %d %Y %H:%M:%S");
+}
+
+// Callback function (get's called when time adjusts via NTP)
+void timeavailable(struct timeval *t)
+{
+  Serial.println("Got time adjustment from NTP!");
+  printLocalTime();
+}
+
+void setup()
+{
+  Serial.begin(115200);
+
+  // set notification call-back function
+  sntp_set_time_sync_notification_cb(timeavailable);
+
+  // This will set configured NTP servers and the new GMT and daylight offsets for IST.
+  configTime(gmtOffset_sec, daylightOffset_sec, ntpServer1, ntpServer2);
+
+  // Connect to WiFi
+  Serial.printf("Connecting to %s ", ssid);
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println(" CONNECTED");
+}
+
+void loop()
+{
+  delay(5000);
+  printLocalTime();     // it will take some time to sync time :)
+}
diff --git a/sources/timer-interrupts.ino b/sources/timer-interrupts.ino
new file mode 100644
index 0000000..d27c838
--- /dev/null
+++ b/sources/timer-interrupts.ino
@@ -0,0 +1,33 @@
+#define LED1 12
+#define LED2 14
+hw_timer_t*My_timer1 = NULL;
+hw_timer_t*My_timer2 = NULL;
+int ledState1 = 0;
+int ledState2 = 0;
+
+void IRAM_ATTR onTimer1(){
+  ledState1 =! ledState1;
+digitalWrite(LED1, ledState1);
+}
+
+void IRAM_ATTR onTimer2(){
+  ledState2 =! ledState2;
+digitalWrite(LED2, ledState2);
+}
+
+void setup() {
+  pinMode(LED1, OUTPUT);
+  My_timer1 = timerBegin(0, 80, true);
+  timerAttachInterrupt(My_timer1, &onTimer1, true);
+  timerAlarmWrite(My_timer1, 1000000, true);
+  timerAlarmEnable(My_timer1);
+  pinMode(LED2, OUTPUT);
+  My_timer2 = timerBegin(1, 200, true);
+  timerAttachInterrupt(My_timer2, &onTimer2, true);
+  timerAlarmWrite(My_timer2, 1000000, true);
+  timerAlarmEnable(My_timer2);
+}
+
+void loop() {
+  //do nothing
+}