diff --git a/SARA/sara_test_udp.py b/SARA/sara_test_udp.py
new file mode 100644
index 0000000..fd4b668
--- /dev/null
+++ b/SARA/sara_test_udp.py
@@ -0,0 +1,154 @@
+r'''
+  ____    _    ____      _
+ / ___|  / \  |  _ \    / \
+ \___ \ / _ \ | |_) |  / _ \
+  ___) / ___ \|  _ <  / ___ \
+ |____/_/   \_\_| \_\/_/   \_\
+
+Test UDP socket connectivity to Miotiq private network (192.168.0.20:4242)
+Creates a UDP socket, connects, writes a small test payload, and closes.
+Each AT step is verified for errors.
+
+/usr/bin/python3 /var/www/nebuleair_pro_4g/SARA/sara_test_udp.py
+'''
+
+import serial
+import time
+import sys
+import re
+
+ser_sara = serial.Serial(
+    port='/dev/ttyAMA2',
+    baudrate=115200,
+    parity=serial.PARITY_NONE,
+    stopbits=serial.STOPBITS_ONE,
+    bytesize=serial.EIGHTBITS,
+    timeout=2
+)
+
+def read_complete_response(serial_connection, timeout=2, end_of_response_timeout=2, wait_for_lines=None, debug=False):
+    if wait_for_lines is None:
+        wait_for_lines = []
+
+    response = bytearray()
+    serial_connection.timeout = timeout
+    end_time = time.time() + end_of_response_timeout
+    start_time = time.time()
+
+    while True:
+        if serial_connection.in_waiting > 0:
+            data = serial_connection.read(serial_connection.in_waiting)
+            response.extend(data)
+            end_time = time.time() + end_of_response_timeout
+
+            decoded_response = response.decode('utf-8', errors='replace')
+            for target_line in wait_for_lines:
+                if target_line in decoded_response:
+                    return decoded_response
+        elif time.time() > end_time:
+            break
+        time.sleep(0.1)
+
+    return response.decode('utf-8', errors='replace')
+
+# Result tracking
+steps = []
+
+def log_step(name, success, detail=""):
+    steps.append({"name": name, "success": success, "detail": detail})
+    icon = "✅" if success else "❌"
+    print(f'{icon} {name}')
+    if detail:
+        print(f'<small class="text-muted">{detail}</small>')
+
+try:
+    sys.stdout.reconfigure(line_buffering=True)
+    ser_sara.reset_input_buffer()
+
+    # Step 1: Create UDP socket (protocol 17 = UDP)
+    command = 'AT+USOCR=17\r'
+    ser_sara.write(command.encode('utf-8'))
+    response = read_complete_response(ser_sara, wait_for_lines=["OK", "+CME ERROR", "ERROR"])
+
+    if "+CME ERROR" in response or "ERROR" in response:
+        log_step("Création socket UDP", False, "AT+USOCR=17 → erreur. La connexion PDP n'est peut-être pas établie.")
+        print('<br><strong>Suggestion :</strong> Lancez "Setup PSD connection" puis réessayez.')
+        sys.exit(1)
+
+    # Extract socket ID
+    match = re.search(r'\+USOCR:\s*(\d+)', response)
+    if not match:
+        log_step("Création socket UDP", False, "Impossible d'extraire le socket ID")
+        sys.exit(1)
+
+    socket_id = match.group(1)
+    log_step("Création socket UDP", True, f"Socket ID: {socket_id}")
+
+    # Step 2: Connect to Miotiq server
+    ser_sara.reset_input_buffer()
+    command = f'AT+USOCO={socket_id},"192.168.0.20",4242\r'
+    ser_sara.write(command.encode('utf-8'))
+    response = read_complete_response(ser_sara, timeout=5, end_of_response_timeout=5, wait_for_lines=["OK", "+CME ERROR", "ERROR"])
+
+    if "+CME ERROR" in response or "ERROR" in response:
+        log_step("Connexion 192.168.0.20:4242", False, f"Erreur connexion au serveur Miotiq")
+        # Close socket
+        ser_sara.write(f'AT+USOCL={socket_id}\r'.encode('utf-8'))
+        read_complete_response(ser_sara, wait_for_lines=["OK", "ERROR"], timeout=1, end_of_response_timeout=1)
+        sys.exit(1)
+
+    log_step("Connexion 192.168.0.20:4242", True)
+
+    # Step 3: Write test payload (4 bytes: "TEST")
+    test_payload = b'TEST'
+    ser_sara.reset_input_buffer()
+    command = f'AT+USOWR={socket_id},{len(test_payload)}\r'
+    ser_sara.write(command.encode('utf-8'))
+    response = read_complete_response(ser_sara, wait_for_lines=["@", "OK", "+CME ERROR", "ERROR"])
+
+    if "@" not in response:
+        log_step("Écriture payload test", False, "Le modem n'a pas envoyé le prompt @")
+        ser_sara.reset_input_buffer()
+        ser_sara.write(f'AT+USOCL={socket_id}\r'.encode('utf-8'))
+        read_complete_response(ser_sara, wait_for_lines=["OK", "ERROR"], timeout=1, end_of_response_timeout=1)
+        sys.exit(1)
+
+    # Send the actual bytes
+    ser_sara.write(test_payload)
+    response = read_complete_response(ser_sara, wait_for_lines=["OK", "+CME ERROR", "ERROR"])
+
+    if "+CME ERROR" in response or "ERROR" in response:
+        log_step("Écriture payload test", False, "Erreur lors de l'envoi des données")
+        ser_sara.write(f'AT+USOCL={socket_id}\r'.encode('utf-8'))
+        read_complete_response(ser_sara, wait_for_lines=["OK", "ERROR"], timeout=1, end_of_response_timeout=1)
+        sys.exit(1)
+
+    log_step("Écriture payload test", True, f"{len(test_payload)} bytes envoyés")
+
+    # Step 4: Close socket
+    ser_sara.reset_input_buffer()
+    command = f'AT+USOCL={socket_id}\r'
+    ser_sara.write(command.encode('utf-8'))
+    response = read_complete_response(ser_sara, wait_for_lines=["OK", "+CME ERROR", "ERROR"])
+
+    if "+CME ERROR" in response or "ERROR" in response:
+        log_step("Fermeture socket", False)
+    else:
+        log_step("Fermeture socket", True)
+
+    # Summary
+    all_ok = all(s["success"] for s in steps)
+    if all_ok:
+        print('<br><strong class="text-success">Toutes les étapes OK — le modem peut envoyer des données UDP vers Miotiq.</strong>')
+    else:
+        print('<br><strong class="text-danger">Certaines étapes ont échoué.</strong>')
+
+except serial.SerialException as e:
+    print(f'❌ Erreur série: {e}')
+
+except Exception as e:
+    print(f'❌ Erreur: {e}')
+
+finally:
+    if ser_sara.is_open:
+        ser_sara.close()
diff --git a/html/launcher.php b/html/launcher.php
index d541cbb..6cc32cd 100755
--- a/html/launcher.php
+++ b/html/launcher.php
@@ -389,6 +389,12 @@ if ($type == "sara_psd_setup") {
     echo $output;
 }
 
+if ($type == "sara_test_udp") {
+    $command = 'sudo /usr/bin/python3 -u /var/www/nebuleair_pro_4g/SARA/sara_test_udp.py';
+    $output = shell_exec($command);
+    echo $output;
+}
+
 
 if ($type == "git_pull") {
     $command = 'sudo git pull';
diff --git a/html/saraR4.html b/html/saraR4.html
index b5aee77..124ba0f 100755
--- a/html/saraR4.html
+++ b/html/saraR4.html
@@ -302,6 +302,48 @@
           </div>
         </div>
       -->
+      <div id="section_miotiq_tests" style="display:none;">
+      <h3>Tests Miotiq (UDP)</h3>
+      <div class="row mb-3">
+
+        <div class="col-sm-4">
+          <div class="card">
+            <div class="card-body">
+              <p class="card-text"><strong>1. Setup PSD connection</strong></p>
+              <p class="text-muted small mb-2">Active la connexion PDP nécessaire pour les sockets UDP.</p>
+              <button class="btn btn-primary" onclick="PSD_setup_miotiq()">Start</button>
+              <div id="loading_PSD_miotiq" class="spinner-border spinner-border-sm" style="display: none;" role="status"></div>
+              <div id="response_psd_setup_miotiq"></div>
+            </div>
+          </div>
+        </div>
+
+        <div class="col-sm-4">
+          <div class="card">
+            <div class="card-body">
+              <p class="card-text"><strong>2. Test socket UDP</strong></p>
+              <p class="text-muted small mb-2">Crée un socket UDP, se connecte à 192.168.0.20:4242, envoie un payload test, puis ferme le socket.</p>
+              <button class="btn btn-primary" onclick="testUdpSocket()">Test UDP</button>
+              <div id="loading_udp_test" class="spinner-border spinner-border-sm" style="display: none;" role="status"></div>
+              <div id="response_udp_test"></div>
+            </div>
+          </div>
+        </div>
+
+        <div class="col-sm-4">
+          <div class="card">
+            <div class="card-body">
+              <p class="card-text"><strong>3. Test aller-retour</strong></p>
+              <p class="text-muted small mb-2">Envoie un payload spécial puis vérifie la réception via l'API descendante Miotiq. (à venir)</p>
+              <button class="btn btn-secondary" disabled>Bientôt disponible</button>
+            </div>
+          </div>
+        </div>
+
+      </div>
+      </div>
+
+      <div id="section_http_tests">
       <h3>Test HTTP server comm.</h3>
       <div class="row mb-3">
       <!-- SET URL -->
@@ -397,6 +439,7 @@
       
       
         </div>
+      </div><!-- end section_http_tests -->
 
         <!-- toast -->
 
@@ -480,6 +523,12 @@ document.addEventListener('DOMContentLoaded', function () {
                     // Show/hide config mode alert banner
                     const alertEl = document.getElementById("configmode_alert");
                     if (alertEl) alertEl.style.display = response.modem_config_mode ? "flex" : "none";
+
+                    // Show Miotiq tests OR HTTP tests depending on SIM type
+                    const sectionHttp = document.getElementById("section_http_tests");
+                    const sectionMiotiq = document.getElementById("section_miotiq_tests");
+                    if (sectionHttp) sectionHttp.style.display = response.send_miotiq ? "none" : "";
+                    if (sectionMiotiq) sectionMiotiq.style.display = response.send_miotiq ? "" : "none";
                 } else {
                     console.error("Checkbox element not found");
                 }
@@ -1626,6 +1675,54 @@ function update_modem_configMode(param, checked){
 
 
 
+function PSD_setup_miotiq() {
+  console.log("Setup PSD connection (Miotiq):");
+  $("#loading_PSD_miotiq").show();
+  $("#response_psd_setup_miotiq").empty();
+  $.ajax({
+    url: 'launcher.php?type=sara_psd_setup',
+    dataType: 'text',
+    method: 'GET',
+    success: function(response) {
+      console.log(response);
+      $("#loading_PSD_miotiq").hide();
+      const formattedResponse = response.replace(/\n/g, "<br>");
+      $("#response_psd_setup_miotiq").html(formattedResponse);
+    },
+    error: function(xhr, status, error) {
+      console.error('AJAX request failed:', status, error);
+      $("#loading_PSD_miotiq").hide();
+    }
+  });
+}
+
+function testUdpSocket() {
+  console.log("Test UDP socket to Miotiq:");
+  $("#response_udp_test").empty();
+  $("#loading_udp_test").show();
+  $.ajax({
+    url: 'launcher.php?type=sara_test_udp',
+    dataType: 'text',
+    method: 'GET',
+    timeout: 30000,
+    success: function(response) {
+      console.log(response);
+      $("#loading_udp_test").hide();
+      const formattedResponse = response.replace(/\n/g, "<br>");
+      $("#response_udp_test").html(formattedResponse);
+    },
+    error: function(xhr, status, error) {
+      console.error('AJAX request failed:', status, error);
+      $("#loading_udp_test").hide();
+      $("#response_udp_test").html(`
+        <div class="alert alert-danger py-2 mt-2">
+          <strong>Erreur de communication</strong><br>
+          <small>${error}</small>
+        </div>`);
+    }
+  });
+}
+
 // Self test functions are now in assets/js/selftest.js