diff --git a/RTC/set_with_NTP.py b/RTC/set_with_NTP.py
new file mode 100644
index 0000000..33b3c5b
--- /dev/null
+++ b/RTC/set_with_NTP.py
@@ -0,0 +1,97 @@
+"""
+Script to set the RTC using an NTP server.
+RPI needs to be connected to the internet (WIFI).
+Requires ntplib and pytz:
+sudo pip3 install ntplib pytz --break-system-packages
+
+/usr/bin/python3 /var/www/nebuleair_pro_4g/RTC/set_with_NTP.py
+
+"""
+import smbus2
+import time
+from datetime import datetime
+import ntplib
+import pytz  # For timezone handling
+
+# DS3231 I2C address
+DS3231_ADDR = 0x68
+
+# Registers for DS3231
+REG_TIME = 0x00
+
+def bcd_to_dec(bcd):
+    """Convert BCD to decimal."""
+    return (bcd // 16 * 10) + (bcd % 16)
+
+def dec_to_bcd(dec):
+    """Convert decimal to BCD."""
+    return (dec // 10 * 16) + (dec % 10)
+
+def set_time(bus, year, month, day, hour, minute, second):
+    """Set the RTC time."""
+    # Convert the time to BCD format
+    second_bcd = dec_to_bcd(second)
+    minute_bcd = dec_to_bcd(minute)
+    hour_bcd = dec_to_bcd(hour)
+    day_bcd = dec_to_bcd(day)
+    month_bcd = dec_to_bcd(month)
+    year_bcd = dec_to_bcd(year - 2000)  # DS3231 uses year from 2000
+
+    # Write time to DS3231
+    bus.write_i2c_block_data(DS3231_ADDR, REG_TIME, [
+        second_bcd,
+        minute_bcd,
+        hour_bcd,
+        0x01,  # Day of the week (1=Monday, etc.)
+        day_bcd,
+        month_bcd,
+        year_bcd
+    ])
+
+def read_time(bus):
+    """Read the RTC time."""
+    data = bus.read_i2c_block_data(DS3231_ADDR, REG_TIME, 7)
+    second = bcd_to_dec(data[0] & 0x7F)
+    minute = bcd_to_dec(data[1])
+    hour = bcd_to_dec(data[2] & 0x3F)
+    day = bcd_to_dec(data[4])
+    month = bcd_to_dec(data[5])
+    year = bcd_to_dec(data[6]) + 2000
+    return (year, month, day, hour, minute, second)
+
+def get_internet_time():
+    """Get the current time from an NTP server."""
+    ntp_client = ntplib.NTPClient()
+    response = ntp_client.request('pool.ntp.org')
+    utc_time = datetime.utcfromtimestamp(response.tx_time)
+    return utc_time
+
+def main():
+    bus = smbus2.SMBus(1)
+
+    # Get the current time from the RTC
+    year, month, day, hours, minutes, seconds = read_time(bus)
+    rtc_time = datetime(year, month, day, hours, minutes, seconds)
+
+    # Get current UTC time from an NTP server
+    try:
+        internet_utc_time = get_internet_time()
+        print(f"Time from Internet (UTC)     : {internet_utc_time.strftime('%Y-%m-%d %H:%M:%S')}")
+    except Exception as e:
+        print(f"Error retrieving time from the internet: {e}")
+        return
+
+    # Print current RTC time
+    print(f"Actual RTC Time              : {rtc_time.strftime('%Y-%m-%d %H:%M:%S')}")
+
+    # Set the RTC to UTC time
+    set_time(bus, internet_utc_time.year, internet_utc_time.month, internet_utc_time.day, 
+             internet_utc_time.hour, internet_utc_time.minute, internet_utc_time.second)
+
+    # Read and print the new time from RTC
+    year, month, day, hour, minute, second = read_time(bus)
+    rtc_time_new = datetime(year, month, day, hour, minute, second)
+    print(f"New RTC Time (UTC)           : {rtc_time_new.strftime('%Y-%m-%d %H:%M:%S')}")
+
+if __name__ == "__main__":
+    main()
diff --git a/RTC/set_with_browserTime.py b/RTC/set_with_browserTime.py
new file mode 100644
index 0000000..9ce29e7
--- /dev/null
+++ b/RTC/set_with_browserTime.py
@@ -0,0 +1,47 @@
+"""
+Script to set the RTC using the browser time.
+
+/usr/bin/python3 /var/www/nebuleair_pro_4g/RTC/set_with_browserTime.py '$rtc_time'
+
+"""
+
+import sys
+from datetime import datetime
+import smbus2
+
+# DS3231 I2C address
+DS3231_ADDR = 0x68
+REG_TIME = 0x00
+
+def dec_to_bcd(dec):
+    """Convert decimal to BCD."""
+    return (dec // 10 * 16) + (dec % 10)
+
+def set_rtc(bus, year, month, day, hour, minute, second):
+    """Set the RTC time."""
+    second_bcd = dec_to_bcd(second)
+    minute_bcd = dec_to_bcd(minute)
+    hour_bcd = dec_to_bcd(hour)
+    day_bcd = dec_to_bcd(day)
+    month_bcd = dec_to_bcd(month)
+    year_bcd = dec_to_bcd(year - 2000)  # RTC stores years since 2000
+
+    bus.write_i2c_block_data(DS3231_ADDR, REG_TIME, [
+        second_bcd, minute_bcd, hour_bcd, 0x01, day_bcd, month_bcd, year_bcd
+    ])
+
+def main():
+    if len(sys.argv) != 2:
+        print("Usage: python3 set_rtc.py 'YYYY-MM-DD HH:MM:SS'")
+        sys.exit(1)
+
+    rtc_time_str = sys.argv[1]
+    rtc_time = datetime.strptime(rtc_time_str, '%Y-%m-%d %H:%M:%S')
+
+    bus = smbus2.SMBus(1)
+    set_rtc(bus, rtc_time.year, rtc_time.month, rtc_time.day,
+            rtc_time.hour, rtc_time.minute, rtc_time.second)
+    print(f"RTC updated to: {rtc_time}")
+
+if __name__ == "__main__":
+    main()
diff --git a/cron_jobs b/cron_jobs
index e6b633b..faf0923 100755
--- a/cron_jobs
+++ b/cron_jobs
@@ -1,10 +1,10 @@
-@reboot chmod 777 /dev/ttyAMA* /dev/i2c-1
+@reboot sleep 10 && chmod 777 /dev/ttyAMA* /dev/i2c-1
 
 @reboot /var/www/nebuleair_pro_4g/boot_hotspot.sh >> /var/www/nebuleair_pro_4g/logs/app.log 2>&1
 
 @reboot sleep 30 && /usr/bin/python3 /var/www/nebuleair_pro_4g/SARA/sara_setURL.py ttyAMA2 data.nebuleair.fr 0 >> /var/www/nebuleair_pro_4g/logs/app.log 2>&1
 
-@reboot sleep 45 && /usr/bin/python3 /var/www/nebuleair_pro_4g/SARA/SSL/prepareUspotProfile.py ttyAMA2 api-prod.uspot.probesys.net >> /var/www/nebuleair_pro_4g/logs/app.log 2>&1
+#@reboot sleep 45 && /usr/bin/python3 /var/www/nebuleair_pro_4g/SARA/SSL/prepareUspotProfile.py ttyAMA2 api-prod.uspot.probesys.net >> /var/www/nebuleair_pro_4g/logs/app.log 2>&1
 
 #* * * * * /usr/bin/python3 /var/www/nebuleair_pro_4g/loop/1_NPM/send_data.py >> /var/www/nebuleair_pro_4g/logs/loop.log 2>&1
 
diff --git a/html/admin.html b/html/admin.html
index 47daafa..5397c65 100755
--- a/html/admin.html
+++ b/html/admin.html
@@ -125,6 +125,12 @@
 
               <div id="alert_container"></div>
 
+              <h5 class="mt-4">Set RTC</h5>
+
+              <button type="submit" class="btn btn-primary mb-1" onclick="set_RTC_withNTP()">WiFi (NTP) </button>
+              <button type="submit" class="btn btn-primary mb-1" onclick="set_RTC_withBrowser()">Browser time </button>
+              <button type="submit" class="btn btn-primary mb-1" onclick="set_RTC_with4G()" disabled>4G (NTP) </button>
+
 
           </div>
 
@@ -240,7 +246,7 @@ window.onload = function() {
                             if (typeof timeDiff === "number") {
                                 if (timeDiff >= 0 && timeDiff <= 10) {
                                     alertContainer.innerHTML = `
-                                        <div class="alert alert-primary" role="alert">
+                                        <div class="alert alert-success" role="alert">
                                             RTC and system time are in sync (Difference: ${timeDiff} sec).
                                         </div>`;
                                 } else if (timeDiff > 10) {
@@ -295,24 +301,76 @@ function update_config(param, value){
 function updateGitPull(){
     console.log("Updating device (git pull)");
 
-        $.ajax({
-            url: 'launcher.php?type=git_pull',
-            method: 'GET', // Use GET or POST depending on your needs
-            dataType: 'text', // Specify that you expect a JSON response
+    $.ajax({
+        url: 'launcher.php?type=git_pull',
+        method: 'GET', // Use GET or POST depending on your needs
+        dataType: 'text', // Specify that you expect a JSON response
+
+        success: function(response) {
+            // Handle success response if needed
+            console.log(response);
+            alert(response);
+            // Reload the page after the device update
+            location.reload(); // This will reload the page
+
+        },
+        error: function(xhr, status, error) {
+            console.error('AJAX request failed:', status, error);
+        }
+    });
+}
+
+function set_RTC_withNTP(){
+    console.log("Set RTC module with WIFI (NTP server)");
+
+    $.ajax({
+        url: 'launcher.php?type=set_RTC_withNTP',
+        method: 'GET', // Use GET or POST depending on your needs
+        dataType: 'text', // Specify that you expect a JSON response
+
+        success: function(response) {
+            // Handle success response if needed
+            console.log(response);
+            alert(response);
+            // Reload the page after the device update
+            location.reload(); // This will reload the page
+
+        },
+        error: function(xhr, status, error) {
+            console.error('AJAX request failed:', status, error);
+        }
+    });
+}
+
+function set_RTC_withBrowser(){
+    console.log("Set RTC module with browser time");
+    const browserTime = new Date(); // Get the current time in the browser
+    const formattedTime = browserTime.toISOString(); // Convert to ISO string (UTC)
+    console.log(formattedTime);
+    
+    $.ajax({
+      url: `launcher.php?type=set_RTC_withBrowser&time=${encodeURIComponent(formattedTime)}`,
+      method: 'GET', // Use GET or POST depending on your needs
+        dataType: 'text', // Specify that you expect a JSON response
+
+        success: function(response) {
+            // Handle success response if needed
+            console.log(response);
+            if (response.success) {
+                alert("RTC successfully updated!");
+            } else {
+                alert(`Error: ${response.message}`);
+            }            // Reload the page after the device update
+            location.reload(); // This will reload the page
+
+        },
+        error: function(xhr, status, error) {
+            console.error('AJAX request failed:', status, error);
+        }
+    });
+}
 
-            success: function(response) {
-                // Handle success response if needed
-                console.log(response);
-                alert(response);
-                // Reload the page after the device update
-                location.reload(); // This will reload the page
 
-            },
-            error: function(xhr, status, error) {
-                console.error('AJAX request failed:', status, error);
-            }
-        });
-      }
 </script>
 
 </body>
diff --git a/html/launcher.php b/html/launcher.php
index 1fb4640..f54b4e0 100755
--- a/html/launcher.php
+++ b/html/launcher.php
@@ -42,6 +42,33 @@ if ($type == "git_pull") {
     echo $output;
 }
 
+if ($type == "set_RTC_withNTP") {
+    $command = '/usr/bin/python3 /var/www/nebuleair_pro_4g/RTC/set_with_NTP.py';
+    $output = shell_exec($command);
+    echo $output;
+}
+
+if ($type == "set_RTC_withBrowser") {
+    $time = $_GET['time'];
+    // Validate time format
+    if (!strtotime($time)) {
+        echo json_encode(['success' => false, 'message' => 'Invalid time format']);
+        exit;
+    }
+    // Convert to RTC-compatible format (e.g., 'YYYY-MM-DD HH:MM:SS')
+    $rtc_time = date('Y-m-d H:i:s', strtotime($time));
+
+     // Execute Python script to update the RTC
+    $command = escapeshellcmd("/usr/bin/python3 /var/www/nebuleair_pro_4g/RTC/set_with_browserTime.py '$rtc_time'");
+    $output = shell_exec($command);
+    if ($output === null) {
+        echo json_encode(['success' => false, 'message' => 'Failed to update RTC']);
+    } else {
+        echo json_encode(['success' => true, 'message' => 'RTC updated successfully']);
+    }
+}
+
+
 if ($type == "clear_loopLogs") {
     $command = 'truncate -s 0 /var/www/nebuleair_pro_4g/logs/loop.log';
     $output = shell_exec($command);