diff --git a/html/admin.html b/html/admin.html
index 8a769f5..0a19ef7 100755
--- a/html/admin.html
+++ b/html/admin.html
@@ -248,7 +248,34 @@
               <button type="button" class="btn-close btn-close-white me-2 m-auto" data-bs-dismiss="toast" aria-label="Close"></button>
             </div>
           </div>
-      </div>
+        </div>
+
+        <!-- Envea Detection Modal -->
+        <div class="modal fade" id="enveaDetectionModal" tabindex="-1" aria-labelledby="enveaDetectionModalLabel" aria-hidden="true">
+          <div class="modal-dialog modal-lg">
+            <div class="modal-content">
+              <div class="modal-header">
+                <h5 class="modal-title" id="enveaDetectionModalLabel">Envea Sondes Detection</h5>
+                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+              </div>
+              <div class="modal-body">
+                <div id="detectionProgress" class="text-center" style="display: none;">
+                  <div class="spinner-border text-primary" role="status">
+                    <span class="visually-hidden">Loading...</span>
+                  </div>
+                  <p class="mt-2">Scanning ports for Envea devices...</p>
+                </div>
+                <div id="detectionResults">
+                  <p>Click "Start Detection" to scan for connected Envea devices.</p>
+                </div>
+              </div>
+              <div class="modal-footer">
+                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Close</button>
+                <button type="button" class="btn btn-primary" id="startDetectionBtn" onclick="startEnveaDetection()">Start Detection</button>
+              </div>
+            </div>
+          </div>
+        </div>
 
 
       </main>
@@ -706,7 +733,7 @@ function add_sondeEnveaContainer() {
         $('#advanced_options').append('<div id="sondes_envea_div" class="input-group mt-4 border p-3 rounded"><legend>Sondes Envea</legend><p>Plouf</p></div>');
       } else {
         // Clear existing content if container exists
-        $('#sondes_envea_div').html('<legend>Sondes Envea</legend>');
+        $('#sondes_envea_div').html('<legend>Sondes Envea <button type="button" class="btn btn-sm btn-info ms-2" onclick="detectEnveaSondes()">Detect Devices</button></legend>');
         $('#envea_table').html('<table class="table table-striped table-bordered">'+
           '<thead><tr><th scope="col">Software</th><th scope="col">Hardware (PCB)</th></tr></thead>'+
           '<tbody>' +
@@ -738,7 +765,7 @@ function add_sondeEnveaContainer() {
               <option value="ttyAMA5" ${sonde.port === 'ttyAMA5' ? 'selected' : ''}>ttyAMA5</option>
             </select>
             <input type="number" class="form-control" placeholder="Coefficient" value="${sonde.coefficient}" 
-              id="${sondeId}_coefficient" readonly style="background-color: #f8f9fa;">
+              id="${sondeId}_coefficient" onchange="updateSondeCoefficientWithConfirm(${sonde.id}, this.value, this)">
           </div>
         `;
         
@@ -936,6 +963,23 @@ function updateSondePort(id, port) {
   });
 }
 
+function updateSondeCoefficientWithConfirm(id, coefficient, inputElement) {
+  // Store the previous value in case user cancels
+  const previousValue = inputElement.getAttribute('data-previous-value') || inputElement.defaultValue;
+  
+  // Show confirmation dialog
+  const confirmed = confirm(`Are you sure you want to change the coefficient to ${coefficient}?\n\nThis will affect sensor calibration and data accuracy.`);
+  
+  if (confirmed) {
+    // Store the new value as previous for next time
+    inputElement.setAttribute('data-previous-value', coefficient);
+    updateSondeCoefficient(id, coefficient);
+  } else {
+    // Revert to previous value
+    inputElement.value = previousValue;
+  }
+}
+
 function updateSondeCoefficient(id, coefficient) {
   console.log(`Updating sonde ${id} coefficient to: ${coefficient}`);
   const toastLiveExample = document.getElementById('liveToast');
@@ -1242,6 +1286,131 @@ function toggleService(serviceName, enable) {
   });
 }
 
+/*
+  _____                       ____       _            _   _             
+ | ____|_ ____   _____  __ _  |  _ \  ___| |_ ___  ___| |_(_) ___  _ __  
+ |  _| | '_ \ \ / / _ \/ _` | | | | |/ _ \ __/ _ \/ __| __| |/ _ \| '_ \ 
+ | |___| | | \ V /  __/ (_| | | |_| |  __/ ||  __/ (__| |_| | (_) | | | |
+ |_____|_| |_|\_/ \___|\__,_| |____/ \___|\__\___|\___|\__|_|\___/|_| |_|
+                                                                        
+*/
+
+function detectEnveaSondes() {
+  console.log("Opening Envea detection modal");
+  const modal = new bootstrap.Modal(document.getElementById('enveaDetectionModal'));
+  modal.show();
+  
+  // Reset modal content
+  document.getElementById('detectionProgress').style.display = 'none';
+  document.getElementById('detectionResults').innerHTML = '<p>Click "Start Detection" to scan for connected Envea devices.</p>';
+  document.getElementById('startDetectionBtn').style.display = 'inline-block';
+}
+
+function startEnveaDetection() {
+  console.log("Starting Envea device detection");
+  
+  // Show progress spinner
+  document.getElementById('detectionProgress').style.display = 'block';
+  document.getElementById('detectionResults').innerHTML = '';
+  document.getElementById('startDetectionBtn').style.display = 'none';
+  
+  // Test the three ports: ttyAMA3, ttyAMA4, ttyAMA5
+  const ports = ['ttyAMA3', 'ttyAMA4', 'ttyAMA5'];
+  let completedTests = 0;
+  let results = [];
+  
+  ports.forEach(function(port, index) {
+    $.ajax({
+      url: `launcher.php?type=detect_envea_device&port=${port}`,
+      dataType: 'json',
+      method: 'GET',
+      cache: false,
+      timeout: 10000, // 10 second timeout per port
+      success: function(response) {
+        console.log(`Detection result for ${port}:`, response);
+        
+        results[index] = {
+          port: port,
+          success: response.success,
+          data: response.data || '',
+          error: response.error || '',
+          detected: response.detected || false,
+          device_info: response.device_info || ''
+        };
+        
+        completedTests++;
+        if (completedTests === ports.length) {
+          displayDetectionResults(results);
+        }
+      },
+      error: function(xhr, status, error) {
+        console.error(`Detection failed for ${port}:`, error);
+        
+        results[index] = {
+          port: port,
+          success: false,
+          data: '',
+          error: `Request failed: ${error}`,
+          detected: false,
+          device_info: ''
+        };
+        
+        completedTests++;
+        if (completedTests === ports.length) {
+          displayDetectionResults(results);
+        }
+      }
+    });
+  });
+}
+
+function displayDetectionResults(results) {
+  console.log("Displaying detection results:", results);
+  
+  // Hide progress spinner
+  document.getElementById('detectionProgress').style.display = 'none';
+  
+  let htmlContent = '<h6>Detection Results:</h6>';
+  htmlContent += '<div class="table-responsive">';
+  htmlContent += '<table class="table table-sm table-striped">';
+  htmlContent += '<thead><tr><th>Port</th><th>Status</th><th>Device Info</th><th>Raw Data</th></tr></thead>';
+  htmlContent += '<tbody>';
+  
+  results.forEach(function(result) {
+    const statusBadge = result.detected ? 
+      '<span class="badge bg-success">Device Detected</span>' : 
+      result.success ? 
+        '<span class="badge bg-warning">No Device</span>' : 
+        '<span class="badge bg-danger">Error</span>';
+    
+    const deviceInfo = result.device_info || (result.detected ? 'Envea Device' : 'None');
+    const rawData = result.data ? result.data.substring(0, 50) + (result.data.length > 50 ? '...' : '') : 'No data';
+    
+    htmlContent += `<tr>
+      <td><strong>${result.port}</strong></td>
+      <td>${statusBadge}</td>
+      <td>${deviceInfo}</td>
+      <td><small class="text-muted">${rawData}</small></td>
+    </tr>`;
+    
+    if (result.error) {
+      htmlContent += `<tr><td colspan="4"><small class="text-danger">Error: ${result.error}</small></td></tr>`;
+    }
+  });
+  
+  htmlContent += '</tbody></table></div>';
+  
+  // Add summary
+  const detectedCount = results.filter(r => r.detected).length;
+  htmlContent += `<div class="alert alert-info mt-3">
+    <strong>Summary:</strong> ${detectedCount} device(s) detected out of ${results.length} ports tested.
+  </div>`;
+  
+  document.getElementById('detectionResults').innerHTML = htmlContent;
+  document.getElementById('startDetectionBtn').style.display = 'inline-block';
+  document.getElementById('startDetectionBtn').textContent = 'Scan Again';
+}
+
 
 </script>
 
diff --git a/sqlite/set_config.py b/sqlite/set_config.py
index 235e173..0570a3f 100644
--- a/sqlite/set_config.py
+++ b/sqlite/set_config.py
@@ -71,9 +71,16 @@ if deleted_count > 0:
     print(f"Deleted {deleted_count} duplicate envea sonde entries")
 
 # Insert envea sondes (only if they don't already exist)
+# Attention pour le H2S il y a plusieurs sondes
+# H2S 1ppm -> coef 4
+# H2S 20ppm -> coef 1
+# H2S 200ppm -> coef 10
+
 envea_sondes = [
-    (False, "ttyAMA4", "h2s", 4),
+    (False, "ttyAMA4", "h2s", 4),  #H2S
     (False, "ttyAMA3", "no2", 1),
+    (False, "ttyAMA3", "nh3", 100),
+    (False, "ttyAMA3", "so2", 4),
     (False, "ttyAMA2", "o3", 1)
 ]