diff --git a/html/admin.html b/html/admin.html
index 2930dd5..9911885 100755
--- a/html/admin.html
+++ b/html/admin.html
@@ -128,6 +128,20 @@
                 </small>
               </div>
 
+              <div class="mb-3">
+                <label for="cpu_power_mode" class="form-label">CPU Power Mode</label>
+                <select class="form-select" id="cpu_power_mode" onchange="set_cpu_power_mode(this.value)">
+                  <option value="normal">Normal (600-1500MHz dynamic)</option>
+                  <option value="powersave">Power Saving (600MHz fixed)</option>
+                </select>
+                <small class="form-text text-muted d-block">
+                  <span id="cpu_mode_status" class="text-success"></span>
+                </small>
+                <small class="form-text text-muted d-block">
+                  Power saving mode reduces CPU performance by ~30-40% but saves power.
+                </small>
+              </div>
+
               <div class="d-flex justify-content-between align-items-center mb-2">
                 <span class="fw-bold">Protected Settings</span>
                 <button type="button" class="btn btn-sm btn-outline-primary" onclick="toggleProtectedSettings()" id="unlockBtn">
@@ -423,6 +437,16 @@ window.onload = function() {
       checkbox_aircarto.checked = response["send_aircarto"];
       checkbox_miotiq.checked = response["send_miotiq"];
 
+      // Set CPU power mode
+      const cpu_power_mode_select = document.getElementById("cpu_power_mode");
+      if (response["cpu_power_mode"]) {
+        cpu_power_mode_select.value = response["cpu_power_mode"];
+        // Update status display
+        const statusElement = document.getElementById('cpu_mode_status');
+        statusElement.textContent = `Current: ${response["cpu_power_mode"]}`;
+        statusElement.className = 'text-success';
+      }
+
       // If envea is enabled, show the envea sondes container
       if (response["envea"]) {
         add_sondeEnveaContainer();
@@ -589,6 +613,83 @@ function update_config_sqlite(param, value){
 }
 
 
+function set_cpu_power_mode(mode) {
+  console.log("Setting CPU power mode to:", mode);
+
+  const toastLiveExample = document.getElementById('liveToast');
+  const toastBody = toastLiveExample.querySelector('.toast-body');
+  const statusElement = document.getElementById('cpu_mode_status');
+
+  // Show loading status
+  statusElement.textContent = 'Applying mode...';
+  statusElement.className = 'text-warning';
+
+  $.ajax({
+    url: 'launcher.php?type=set_cpu_power_mode&mode=' + mode,
+    dataType: 'json',
+    method: 'GET',
+    cache: false,
+    success: function(response) {
+      console.log(response);
+
+      let formattedMessage;
+
+      if (response.success) {
+        // Success message
+        toastLiveExample.classList.remove('text-bg-danger');
+        toastLiveExample.classList.add('text-bg-success');
+
+        formattedMessage = `
+          <strong>Success!</strong><br>
+          CPU mode set to: <strong>${mode}</strong><br>
+          ${response.description || ''}
+        `;
+
+        // Update status
+        statusElement.textContent = `Current: ${mode}`;
+        statusElement.className = 'text-success';
+
+      } else {
+        // Error message
+        toastLiveExample.classList.remove('text-bg-success');
+        toastLiveExample.classList.add('text-bg-danger');
+
+        formattedMessage = `
+          <strong>Error!</strong><br>
+          ${response.error || 'Failed to set CPU power mode'}
+        `;
+
+        // Reset status
+        statusElement.textContent = 'Error setting mode';
+        statusElement.className = 'text-danger';
+      }
+
+      // Update the toast body with formatted content
+      toastBody.innerHTML = formattedMessage;
+
+      // Show the toast
+      const toastBootstrap = bootstrap.Toast.getOrCreateInstance(toastLiveExample);
+      toastBootstrap.show();
+    },
+    error: function(xhr, status, error) {
+      console.error('AJAX request failed:', status, error);
+
+      // Show error in toast
+      toastLiveExample.classList.remove('text-bg-success');
+      toastLiveExample.classList.add('text-bg-danger');
+      toastBody.innerHTML = `<strong>Error!</strong><br>Network error: ${error}`;
+
+      const toastBootstrap = bootstrap.Toast.getOrCreateInstance(toastLiveExample);
+      toastBootstrap.show();
+
+      // Update status
+      statusElement.textContent = 'Network error';
+      statusElement.className = 'text-danger';
+    }
+  });
+}
+
+
 function update_config(param, value){
   console.log("Updating ",param," : ", value);
   $.ajax({
diff --git a/html/launcher.php b/html/launcher.php
index 52c603d..161305a 100755
--- a/html/launcher.php
+++ b/html/launcher.php
@@ -1423,3 +1423,95 @@ if ($type == "detect_envea_device") {
         ]);
     }
 }
+
+/*
+   ____ ____  _   _   ____                       __  __                                                   _
+  / ___|  _ \| | | | |  _ \ _____      _____ _ _|  \/  | __ _ _ __   __ _  __ _  ___ _ __ ___   ___ _ __ | |_
+ | |   | |_) | | | | | |_) / _ \ \ /\ / / _ \ '__| |\/| |/ _` | '_ \ / _` |/ _` |/ _ \ '_ ` _ \ / _ \ '_ \| __|
+ | |___|  __/| |_| | |  __/ (_) \ V  V /  __/ |  | |  | | (_| | | | | (_| | (_| |  __/ | | | | |  __/ | | | |_
+  \____|_|    \___/  |_|   \___/ \_/\_/ \___|_|  |_|  |_|\__,_|_| |_|\__,_|\__, |\___|_| |_| |_|\___|_| |_|\__|
+                                                                            |___/
+*/
+
+// Get current CPU power mode
+if ($type == "get_cpu_power_mode") {
+    try {
+        $command = 'sudo /usr/bin/python3 /var/www/nebuleair_pro_4g/power/set_cpu_mode.py get 2>&1';
+        $output = shell_exec($command);
+
+        // Try to parse JSON output
+        $result = json_decode($output, true);
+
+        if ($result && isset($result['success']) && $result['success']) {
+            echo json_encode([
+                'success' => true,
+                'mode' => $result['config_mode'] ?? 'unknown',
+                'cpu_state' => $result['cpu_state'] ?? null
+            ], JSON_PRETTY_PRINT);
+        } else {
+            echo json_encode([
+                'success' => false,
+                'error' => 'Failed to get CPU power mode',
+                'output' => $output
+            ]);
+        }
+    } catch (Exception $e) {
+        echo json_encode([
+            'success' => false,
+            'error' => 'Script execution failed: ' . $e->getMessage()
+        ]);
+    }
+}
+
+// Set CPU power mode
+if ($type == "set_cpu_power_mode") {
+    $mode = $_GET['mode'] ?? null;
+
+    if (empty($mode)) {
+        echo json_encode([
+            'success' => false,
+            'error' => 'No mode specified'
+        ]);
+        exit;
+    }
+
+    // Validate mode (whitelist)
+    $allowedModes = ['normal', 'powersave'];
+
+    if (!in_array($mode, $allowedModes)) {
+        echo json_encode([
+            'success' => false,
+            'error' => 'Invalid mode. Allowed: normal, powersave'
+        ]);
+        exit;
+    }
+
+    try {
+        // Execute the CPU power mode script
+        $command = 'sudo /usr/bin/python3 /var/www/nebuleair_pro_4g/power/set_cpu_mode.py ' . escapeshellarg($mode) . ' 2>&1';
+        $output = shell_exec($command);
+
+        // Try to parse JSON output
+        $result = json_decode($output, true);
+
+        if ($result && isset($result['success']) && $result['success']) {
+            echo json_encode([
+                'success' => true,
+                'mode' => $mode,
+                'message' => "CPU power mode set to: $mode",
+                'description' => $result['description'] ?? ''
+            ], JSON_PRETTY_PRINT);
+        } else {
+            echo json_encode([
+                'success' => false,
+                'error' => $result['error'] ?? 'Failed to set CPU power mode',
+                'output' => $output
+            ]);
+        }
+    } catch (Exception $e) {
+        echo json_encode([
+            'success' => false,
+            'error' => 'Script execution failed: ' . $e->getMessage()
+        ]);
+    }
+}
diff --git a/installation_part1.sh b/installation_part1.sh
index ee0b4ba..afd76eb 100644
--- a/installation_part1.sh
+++ b/installation_part1.sh
@@ -141,11 +141,11 @@ if ! sudo visudo -c; then
     error "Sudoers file has syntax errors! Please fix manually with 'sudo visudo'"
 fi
 
-# Open all UART serial ports and disable HDMI (avoid duplication)
-info "Configuring UART serial ports and disabling HDMI to save power..."
+# Open all UART serial ports and disable HDMI + Bluetooth (avoid duplication)
+info "Configuring UART serial ports and disabling HDMI/Bluetooth to save power..."
 if ! grep -q "enable_uart=1" /boot/firmware/config.txt; then
-    echo -e "\nenable_uart=1\ndtoverlay=uart0\ndtoverlay=uart1\ndtoverlay=uart2\ndtoverlay=uart3\ndtoverlay=uart4\ndtoverlay=uart5\n\n# Disable HDMI to save power (~20-30mA)\nhdmi_blanking=2" | sudo tee -a /boot/firmware/config.txt > /dev/null
-    success "UART configuration and HDMI disable added."
+    echo -e "\nenable_uart=1\ndtoverlay=uart0\ndtoverlay=uart1\ndtoverlay=uart2\ndtoverlay=uart3\ndtoverlay=uart4\ndtoverlay=uart5\n\n# Disable HDMI to save power (~20-30mA)\nhdmi_blanking=2\n\n# Disable Bluetooth to save power (~20-30mA)\ndtoverlay=disable-bt" | sudo tee -a /boot/firmware/config.txt > /dev/null
+    success "UART configuration, HDMI and Bluetooth disable added."
 else
     warning "UART configuration already set. Skipping."
 fi
diff --git a/power/apply_cpu_mode_from_db.py b/power/apply_cpu_mode_from_db.py
new file mode 100644
index 0000000..5dfbe09
--- /dev/null
+++ b/power/apply_cpu_mode_from_db.py
@@ -0,0 +1,71 @@
+#!/usr/bin/env python3
+"""
+Apply CPU Power Mode from Database at Boot
+
+This script is called by systemd at boot to apply the CPU power mode
+stored in the database (cpu_power_mode config parameter).
+
+Usage:
+  /usr/bin/python3 /var/www/nebuleair_pro_4g/power/apply_cpu_mode_from_db.py
+"""
+
+import sqlite3
+import sys
+import subprocess
+
+DB_PATH = "/var/www/nebuleair_pro_4g/sqlite/sensors.db"
+SET_MODE_SCRIPT = "/var/www/nebuleair_pro_4g/power/set_cpu_mode.py"
+
+def get_cpu_mode_from_db():
+    """Read cpu_power_mode from database"""
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        cursor = conn.cursor()
+        cursor.execute("SELECT value FROM config_table WHERE key = 'cpu_power_mode'")
+        result = cursor.fetchone()
+        conn.close()
+        return result[0] if result else None
+    except sqlite3.Error as e:
+        print(f"Database error: {e}", file=sys.stderr)
+        return None
+
+def main():
+    """Main function"""
+    print("=== Applying CPU Power Mode from Database ===")
+
+    # Get mode from database
+    mode = get_cpu_mode_from_db()
+
+    if mode is None:
+        print("No cpu_power_mode found in database, using default: normal")
+        mode = "normal"
+
+    print(f"CPU power mode from database: {mode}")
+
+    # Call set_cpu_mode.py to apply the mode
+    try:
+        result = subprocess.run(
+            ["/usr/bin/python3", SET_MODE_SCRIPT, mode],
+            capture_output=True,
+            text=True,
+            timeout=30
+        )
+
+        if result.returncode == 0:
+            print(f"Successfully applied CPU power mode: {mode}")
+            print(result.stdout)
+            return 0
+        else:
+            print(f"Failed to apply CPU power mode: {mode}", file=sys.stderr)
+            print(result.stderr, file=sys.stderr)
+            return 1
+
+    except subprocess.TimeoutExpired:
+        print("Timeout while applying CPU power mode", file=sys.stderr)
+        return 1
+    except Exception as e:
+        print(f"Error: {e}", file=sys.stderr)
+        return 1
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/power/set_cpu_mode.py b/power/set_cpu_mode.py
new file mode 100644
index 0000000..8fa7d56
--- /dev/null
+++ b/power/set_cpu_mode.py
@@ -0,0 +1,256 @@
+#!/usr/bin/env python3
+"""
+ ____ ____  _   _   ____                       __  __           _
+/ ___|  _ \| | | | |  _ \ _____      _____ _ _|  \/  | ___   __| | ___
+| |   | |_) | | | | | |_) / _ \ \ /\ / / _ \ '__| |\/| |/ _ \ / _` |/ _ \
+| |___|  __/| |_| | |  __/ (_) \ V  V /  __/ |  | |  | | (_) | (_| |  __/
+\____|_|    \___/  |_|   \___/ \_/\_/ \___|_|  |_|  |_|\___/ \__,_|\___|
+
+CPU Power Mode Management Script
+Switches between Normal and Power Saving CPU modes.
+
+Modes:
+- normal: CPU governor ondemand (600MHz-1500MHz dynamic)
+- powersave: CPU governor powersave (600MHz fixed)
+
+Usage:
+  /usr/bin/python3 /var/www/nebuleair_pro_4g/power/set_cpu_mode.py <mode>
+  /usr/bin/python3 /var/www/nebuleair_pro_4g/power/set_cpu_mode.py normal
+  /usr/bin/python3 /var/www/nebuleair_pro_4g/power/set_cpu_mode.py powersave
+
+Or get current mode:
+  /usr/bin/python3 /var/www/nebuleair_pro_4g/power/set_cpu_mode.py get
+"""
+
+import sqlite3
+import subprocess
+import sys
+import datetime
+import json
+
+# Paths
+DB_PATH = "/var/www/nebuleair_pro_4g/sqlite/sensors.db"
+LOG_PATH = "/var/www/nebuleair_pro_4g/logs/app.log"
+
+# Available modes
+MODES = {
+    "normal": {
+        "governor": "ondemand",
+        "description": "Normal mode - CPU 600MHz-1500MHz dynamic",
+        "min_freq": 600000,  # 600 MHz in kHz
+        "max_freq": 1500000  # 1500 MHz in kHz
+    },
+    "powersave": {
+        "governor": "powersave",
+        "description": "Power saving mode - CPU 600MHz fixed",
+        "min_freq": 600000,
+        "max_freq": 600000
+    }
+}
+
+def log_message(message):
+    """Write message to log file with timestamp"""
+    timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+    log_entry = f"[{timestamp}] [CPU Power Mode] {message}\n"
+    try:
+        with open(LOG_PATH, "a") as log_file:
+            log_file.write(log_entry)
+    except Exception as e:
+        print(f"Failed to write to log: {e}", file=sys.stderr)
+    print(log_entry.strip())
+
+def get_cpu_count():
+    """Get number of CPU cores"""
+    try:
+        result = subprocess.run(
+            ["nproc"],
+            capture_output=True,
+            text=True,
+            timeout=5
+        )
+        return int(result.stdout.strip())
+    except Exception as e:
+        log_message(f"Failed to get CPU count: {e}")
+        return 4  # Default to 4 cores for CM4
+
+def set_cpu_governor(governor, cpu_id):
+    """Set CPU governor for specific CPU core"""
+    try:
+        with open(f"/sys/devices/system/cpu/cpu{cpu_id}/cpufreq/scaling_governor", "w") as f:
+            f.write(governor)
+        return True
+    except Exception as e:
+        log_message(f"Failed to set governor for CPU{cpu_id}: {e}")
+        return False
+
+def set_cpu_freq(min_freq, max_freq, cpu_id):
+    """Set CPU frequency limits for specific CPU core"""
+    try:
+        # Set min frequency
+        with open(f"/sys/devices/system/cpu/cpu{cpu_id}/cpufreq/scaling_min_freq", "w") as f:
+            f.write(str(min_freq))
+
+        # Set max frequency
+        with open(f"/sys/devices/system/cpu/cpu{cpu_id}/cpufreq/scaling_max_freq", "w") as f:
+            f.write(str(max_freq))
+
+        return True
+    except Exception as e:
+        log_message(f"Failed to set frequency for CPU{cpu_id}: {e}")
+        return False
+
+def get_current_cpu_state():
+    """Get current CPU governor and frequencies"""
+    try:
+        with open("/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor", "r") as f:
+            governor = f.read().strip()
+
+        with open("/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq", "r") as f:
+            min_freq = int(f.read().strip())
+
+        with open("/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq", "r") as f:
+            max_freq = int(f.read().strip())
+
+        with open("/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq", "r") as f:
+            cur_freq = int(f.read().strip())
+
+        return {
+            "governor": governor,
+            "min_freq_khz": min_freq,
+            "max_freq_khz": max_freq,
+            "current_freq_khz": cur_freq,
+            "min_freq_mhz": min_freq / 1000,
+            "max_freq_mhz": max_freq / 1000,
+            "current_freq_mhz": cur_freq / 1000
+        }
+    except Exception as e:
+        log_message(f"Failed to get current CPU state: {e}")
+        return None
+
+def update_config_db(mode):
+    """Update cpu_power_mode in database"""
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        cursor = conn.cursor()
+        cursor.execute(
+            "UPDATE config_table SET value = ? WHERE key = 'cpu_power_mode'",
+            (mode,)
+        )
+        conn.commit()
+        conn.close()
+        return True
+    except sqlite3.Error as e:
+        log_message(f"Database error: {e}")
+        return False
+
+def get_config_from_db():
+    """Read cpu_power_mode from database"""
+    try:
+        conn = sqlite3.connect(DB_PATH)
+        cursor = conn.cursor()
+        cursor.execute("SELECT value FROM config_table WHERE key = 'cpu_power_mode'")
+        result = cursor.fetchone()
+        conn.close()
+        return result[0] if result else None
+    except sqlite3.Error as e:
+        log_message(f"Database error: {e}")
+        return None
+
+def apply_mode(mode):
+    """Apply CPU power mode"""
+    if mode not in MODES:
+        log_message(f"Invalid mode: {mode}. Valid modes: {', '.join(MODES.keys())}")
+        return False
+
+    mode_config = MODES[mode]
+    log_message(f"Applying mode: {mode} - {mode_config['description']}")
+
+    cpu_count = get_cpu_count()
+    log_message(f"Detected {cpu_count} CPU cores")
+
+    success = True
+
+    # Apply settings to all CPU cores
+    for cpu_id in range(cpu_count):
+        # Set frequency limits first
+        if not set_cpu_freq(mode_config['min_freq'], mode_config['max_freq'], cpu_id):
+            success = False
+
+        # Then set governor
+        if not set_cpu_governor(mode_config['governor'], cpu_id):
+            success = False
+
+    if success:
+        log_message(f"Successfully applied {mode} mode to all {cpu_count} cores")
+
+        # Update database
+        if update_config_db(mode):
+            log_message(f"Updated database: cpu_power_mode = {mode}")
+        else:
+            log_message("Warning: Failed to update database")
+
+        # Log current state
+        state = get_current_cpu_state()
+        if state:
+            log_message(f"Current CPU state: {state['governor']} governor, "
+                       f"{state['min_freq_mhz']:.0f}-{state['max_freq_mhz']:.0f} MHz "
+                       f"(current: {state['current_freq_mhz']:.0f} MHz)")
+    else:
+        log_message(f"Failed to apply {mode} mode completely")
+
+    return success
+
+def main():
+    """Main function"""
+    if len(sys.argv) < 2:
+        print("Usage: set_cpu_mode.py <mode>")
+        print("Modes: normal, powersave")
+        print("Or: set_cpu_mode.py get  (to get current state)")
+        return 1
+
+    command = sys.argv[1].lower()
+
+    # Handle "get" command to return current state
+    if command == "get":
+        state = get_current_cpu_state()
+        db_mode = get_config_from_db()
+
+        if state:
+            output = {
+                "success": True,
+                "cpu_state": state,
+                "config_mode": db_mode
+            }
+            print(json.dumps(output))
+            return 0
+        else:
+            output = {
+                "success": False,
+                "error": "Failed to read CPU state"
+            }
+            print(json.dumps(output))
+            return 1
+
+    # Handle mode setting
+    log_message("=== CPU Power Mode Script Started ===")
+
+    if apply_mode(command):
+        log_message("=== CPU Power Mode Script Completed Successfully ===")
+        output = {
+            "success": True,
+            "mode": command,
+            "description": MODES[command]['description']
+        }
+        print(json.dumps(output))
+        return 0
+    else:
+        log_message("=== CPU Power Mode Script Failed ===")
+        output = {
+            "success": False,
+            "error": f"Failed to apply mode: {command}"
+        }
+        print(json.dumps(output))
+        return 1
+
+if __name__ == "__main__":
+    sys.exit(main())
diff --git a/services/nebuleair-cpu-power.service b/services/nebuleair-cpu-power.service
new file mode 100644
index 0000000..e32f873
--- /dev/null
+++ b/services/nebuleair-cpu-power.service
@@ -0,0 +1,15 @@
+[Unit]
+Description=NebuleAir CPU Power Mode Service
+After=multi-user.target
+Wants=multi-user.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/python3 /var/www/nebuleair_pro_4g/power/apply_cpu_mode_from_db.py
+User=root
+StandardOutput=journal
+StandardError=journal
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target
diff --git a/services/setup_services.sh b/services/setup_services.sh
index 0c757fd..97f5e84 100644
--- a/services/setup_services.sh
+++ b/services/setup_services.sh
@@ -270,6 +270,25 @@ Persistent=false
 WantedBy=timers.target
 EOL
 
+# Create service file for CPU Power Mode (runs once at boot)
+cat > /etc/systemd/system/nebuleair-cpu-power.service << 'EOL'
+[Unit]
+Description=NebuleAir CPU Power Mode Service
+After=multi-user.target
+Wants=multi-user.target
+
+[Service]
+Type=oneshot
+ExecStart=/usr/bin/python3 /var/www/nebuleair_pro_4g/power/apply_cpu_mode_from_db.py
+User=root
+StandardOutput=journal
+StandardError=journal
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target
+EOL
+
 # Reload systemd to recognize new services
 systemctl daemon-reload
 
@@ -286,6 +305,11 @@ systemctl enable nebuleair-wifi-powersave.timer
 systemctl start nebuleair-wifi-powersave.timer
 echo "Started nebuleair-wifi-powersave timer"
 
+# Enable and start CPU power mode service (runs once at boot)
+systemctl enable nebuleair-cpu-power.service
+systemctl start nebuleair-cpu-power.service
+echo "Started nebuleair-cpu-power service"
+
 echo "Checking status of all timers..."
 systemctl list-timers | grep nebuleair
 
diff --git a/sqlite/set_config.py b/sqlite/set_config.py
index 1f15c4d..da95c4c 100644
--- a/sqlite/set_config.py
+++ b/sqlite/set_config.py
@@ -52,7 +52,8 @@ config_entries = [
     ("NOISE", "0", "bool"),
     ("modem_version", "XXX", "str"),
     ("language", "fr", "str"),
-    ("wifi_power_saving", "0", "bool")
+    ("wifi_power_saving", "0", "bool"),
+    ("cpu_power_mode", "normal", "str")
 ]
 
 for key, value, value_type in config_entries: