diff --git a/include/YaSolR.h b/include/YaSolR.h
index a3cf949..8c194b9 100644
--- a/include/YaSolR.h
+++ b/include/YaSolR.h
@@ -6,6 +6,7 @@
 
 #include <AsyncUDP.h>
 #include <ESPAsyncWebServer.h>
+#include <FastCRC32.h>
 #include <HardwareSerial.h>
 #include <LittleFS.h>
 
@@ -35,17 +36,17 @@
 #include <MycilaZCD.h>
 
 #ifdef APP_MODEL_TRIAL
-#include <MycilaTrial.h>
+  #include <MycilaTrial.h>
 #endif
 
 #ifdef APP_MODEL_PRO
-#include <ESPDashPro.h>
-#include <ElegantOTAPro.h>
-#include <WebSerialPro.h>
+  #include <ESPDashPro.h>
+  #include <ElegantOTAPro.h>
+  #include <WebSerialPro.h>
 #else
-#include <ESPDash.h>
-#include <ElegantOTA.h>
-#include <WebSerial.h>
+  #include <ESPDash.h>
+  #include <ElegantOTA.h>
+  #include <WebSerial.h>
 #endif
 
 #include <YaSolRDefines.h>
@@ -127,3 +128,5 @@ extern Mycila::Task initLoggingTask;
 extern Mycila::Task initMqttSubscribersTask;
 extern Mycila::Task initRestApiTask;
 extern Mycila::Task initWebTask;
+
+extern Mycila::CircularBuffer<float, 50> jsyRemoteUdpRate;
diff --git a/include/YaSolRWebsite.h b/include/YaSolRWebsite.h
index 155db78..e4ae2f0 100644
--- a/include/YaSolRWebsite.h
+++ b/include/YaSolRWebsite.h
@@ -67,6 +67,8 @@ namespace YaSolR {
       Statistic _relay1SwitchCount = Statistic(&dashboard, YASOLR_LBL_032);
       Statistic _relay2SwitchCount = Statistic(&dashboard, YASOLR_LBL_033);
 
+      Statistic _jsyRemoteUdpRate = Statistic(&dashboard, YASOLR_LBL_157);
+
       Statistic _time = Statistic(&dashboard, YASOLR_LBL_034);
       Statistic _uptime = Statistic(&dashboard, YASOLR_LBL_035);
 #ifdef APP_MODEL_TRIAL
diff --git a/include/i18n/en.h b/include/i18n/en.h
index 885db86..baa6c2e 100644
--- a/include/i18n/en.h
+++ b/include/i18n/en.h
@@ -160,7 +160,7 @@
 #define YASOLR_LBL_154 "Invalid"
 #define YASOLR_LBL_155 "Input Only"
 #define YASOLR_LBL_156 "I/O"
-#define YASOLR_LBL_157
+#define YASOLR_LBL_157 "JSY Remote UDP: Reception Rate"
 #define YASOLR_LBL_158
 #define YASOLR_LBL_159
 #define YASOLR_LBL_160
diff --git a/include/i18n/fr.h b/include/i18n/fr.h
index 3a8540e..32c91c1 100644
--- a/include/i18n/fr.h
+++ b/include/i18n/fr.h
@@ -160,7 +160,7 @@
 #define YASOLR_LBL_154 "Invalide"
 #define YASOLR_LBL_155 "Entrée uniquement"
 #define YASOLR_LBL_156 "E/S"
-#define YASOLR_LBL_157
+#define YASOLR_LBL_157 "JSY Remote UDP: Vitesse de réception"
 #define YASOLR_LBL_158
 #define YASOLR_LBL_159
 #define YASOLR_LBL_160
diff --git a/lib/DimmableLight/src/thyristor.cpp b/lib/DimmableLight/src/thyristor.cpp
index 260d318..1f284aa 100644
--- a/lib/DimmableLight/src/thyristor.cpp
+++ b/lib/DimmableLight/src/thyristor.cpp
@@ -471,7 +471,7 @@ void Thyristor::setFrequency(float frequency) {
 uint16_t Thyristor::getPulseWidth() {
   noInterrupts();
   uint32_t diff = micros() - lastTime;
-  if (diff > semiPeriodLength) {
+  if (semiPeriodLength && diff > semiPeriodLength) {
     pulses.reset();
   }
   uint16_t avg = pulses.avg();
@@ -482,7 +482,7 @@ uint16_t Thyristor::getPulseWidth() {
 uint16_t Thyristor::getMaxPulseWidth() {
   noInterrupts();
   uint32_t diff = micros() - lastTime;
-  if (diff > semiPeriodLength) {
+  if (semiPeriodLength && diff > semiPeriodLength) {
     pulses.reset();
   }
   uint16_t max = pulses.max();
@@ -493,7 +493,7 @@ uint16_t Thyristor::getMaxPulseWidth() {
 uint16_t Thyristor::getMinPulseWidth() {
   noInterrupts();
   uint32_t diff = micros() - lastTime;
-  if (diff > semiPeriodLength) {
+  if (semiPeriodLength && diff > semiPeriodLength) {
     pulses.reset();
   }
   uint16_t min = pulses.min();
@@ -504,7 +504,7 @@ uint16_t Thyristor::getMinPulseWidth() {
 uint16_t Thyristor::getLastPulseWidth() {
   noInterrupts();
   uint32_t diff = micros() - lastTime;
-  if (diff > semiPeriodLength) {
+  if (semiPeriodLength && diff > semiPeriodLength) {
     pulses.reset();
   }
   uint16_t last = pulses.last();
diff --git a/lib/MycilaCircularBuffer/MycilaCircularBuffer.h b/lib/MycilaCircularBuffer/MycilaCircularBuffer.h
index e59c90b..9c8f98a 100644
--- a/lib/MycilaCircularBuffer/MycilaCircularBuffer.h
+++ b/lib/MycilaCircularBuffer/MycilaCircularBuffer.h
@@ -19,15 +19,19 @@ namespace Mycila {
 
       size_t count() const { return _count; };
       T avg() const { return _count == 0 ? 0 : _sum / _count; }
-      T last() const { return _last; }
+      T first() const { return _buffer[_index]; }
+      T last() const { return _buffer[_index == 0 ? N - 1 : _index - 1]; }
       T sum() const { return _sum; }
       T max() const { return _max; }
       T min() const { return _min; }
+      T rate() const {
+        T diff = last() - first();
+        return diff == 0 ? 0 : _count / diff;
+      }
 
       T add(T value) {
         T current = _buffer[_index];
         _buffer[_index++] = value;
-        _last = value;
         if (value > _max)
           _max = value;
         if (value < _min)
@@ -49,7 +53,6 @@ namespace Mycila {
 
       void reset() {
         _sum = 0;
-        _last = 0;
         _min = std::numeric_limits<T>::max();
         _max = std::numeric_limits<T>::min();
         _index = 0;
@@ -73,7 +76,6 @@ namespace Mycila {
     private:
       T _buffer[N];
       T _sum;
-      T _last;
       T _min;
       T _max;
       size_t _index = 0;
diff --git a/lib/MycilaDimmer/MycilaDimmer.h b/lib/MycilaDimmer/MycilaDimmer.h
index fb93523..fbc6a1a 100644
--- a/lib/MycilaDimmer/MycilaDimmer.h
+++ b/lib/MycilaDimmer/MycilaDimmer.h
@@ -39,7 +39,7 @@ namespace Mycila {
 
       gpio_num_t getPin() const { return _pin; }
       bool isEnabled() const { return _enabled; }
-      bool isConnected() const { return _zcd->isConnected(); }
+      bool isConnected() const { return _enabled && _zcd->isConnected(); }
 
       void toJson(const JsonObject& root) const {
         const float angle = getPhaseAngle();
@@ -74,7 +74,7 @@ namespace Mycila {
       // At 100% power, the phase angle is equal to 0
       float getPhaseAngle() const {
         // angle_rad = PI * delay_s / period_s
-        return PI * _zcd->getFrequency() * getFiringDelay() / 1000000;
+        return PI * _zcd->getPulseFrequency() * getFiringDelay() / 1000000;
       }
 
     private:
diff --git a/lib/MycilaDimmer/MycilaZCD.cpp b/lib/MycilaDimmer/MycilaZCD.cpp
index 8704549..f9d0ba8 100644
--- a/lib/MycilaDimmer/MycilaZCD.cpp
+++ b/lib/MycilaDimmer/MycilaZCD.cpp
@@ -51,7 +51,7 @@ void Mycila::ZCD::begin(const int8_t pin, const uint8_t frequency) {
   Thyristor::setSyncPin(_pin);
   Thyristor::begin();
 
-  // attachInterrupt(digitalPinToInterrupt(_pin), onEdge, CHANGE);
+  _frequencyUpdater.attach(1, +[](ZCD* instance) { instance->_measuredGridFrequency = Thyristor::getDetectedFrequency(); }, this);
 
   _enabled = true;
 }
@@ -59,6 +59,7 @@ void Mycila::ZCD::begin(const int8_t pin, const uint8_t frequency) {
 void Mycila::ZCD::end() {
   if (_enabled) {
     LOGI(TAG, "Disable Zero-Cross Detection...");
+    _frequencyUpdater.detach();
     _enabled = false;
     Thyristor::setFrequency(0);
     Thyristor::end();
@@ -67,8 +68,6 @@ void Mycila::ZCD::end() {
 }
 
 uint16_t Mycila::ZCD::getSemiPeriod() const { return _enabled ? Thyristor::getSemiPeriod() : 0; }
-float Mycila::ZCD::getFrequency() const { return getCurrentFrequency() * 2; }
-float Mycila::ZCD::getCurrentFrequency() const { return _enabled ? Thyristor::getDetectedFrequency() : 0; }
 uint16_t Mycila::ZCD::getAvgPulseWidth() const { return _enabled ? Thyristor::getPulseWidth() : 0; }
 uint16_t Mycila::ZCD::getMaxPulseWidth() const { return _enabled ? Thyristor::getMaxPulseWidth() : 0; }
 uint16_t Mycila::ZCD::getLastPulseWidth() const { return _enabled ? Thyristor::getLastPulseWidth() : 0; }
diff --git a/lib/MycilaDimmer/MycilaZCD.h b/lib/MycilaDimmer/MycilaZCD.h
index 2acfe38..75b59fe 100644
--- a/lib/MycilaDimmer/MycilaZCD.h
+++ b/lib/MycilaDimmer/MycilaZCD.h
@@ -5,6 +5,8 @@
 #pragma once
 
 #include <ArduinoJson.h>
+#include <Ticker.h>
+
 #include <esp32-hal-gpio.h>
 
 namespace Mycila {
@@ -15,20 +17,18 @@ namespace Mycila {
 
       gpio_num_t getPin() const { return _pin; }
       bool isEnabled() const { return _enabled; }
-      bool isConnected() const { return getFrequency() > 0; }
+      bool isConnected() const { return _measuredGridFrequency > 0; }
 
       // in microseconds
       // 50Hz => 10000
       // 60Hz => 8333
       uint16_t getSemiPeriod() const;
 
-      // Detect the Zero-Cross pulse frequency in Hz
-      float getFrequency() const;
-
       // Grid frequency in Hz based on the Zero-Cross pulse frequency
-      float getCurrentFrequency() const;
+      float getCurrentFrequency() const { return _enabled ? _measuredGridFrequency : 0; }
 
-      // Detect the Zero-Cross pulse width in microseconds
+      // Zero-Cross pulse information
+      float getPulseFrequency() const { return _enabled ? _measuredGridFrequency * 2 : 0; }
       uint16_t getAvgPulseWidth() const;
       uint16_t getLastPulseWidth() const;
       uint16_t getMaxPulseWidth() const;
@@ -36,7 +36,7 @@ namespace Mycila {
 
       void toJson(const JsonObject& root) const {
         root["enabled"] = isEnabled();
-        root["pulse_freq"] = getFrequency();
+        root["pulse_freq"] = getPulseFrequency();
         root["pulse_width_avg"] = getAvgPulseWidth();
         root["pulse_width_last"] = getLastPulseWidth();
         root["pulse_width_max"] = getMaxPulseWidth();
@@ -46,6 +46,8 @@ namespace Mycila {
 
     private:
       bool _enabled = false;
+      volatile float _measuredGridFrequency = 0;
+      Ticker _frequencyUpdater;
       gpio_num_t _pin = GPIO_NUM_NC;
   };
 } // namespace Mycila
diff --git a/platformio.ini b/platformio.ini
index d20ede5..29d9a70 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -47,11 +47,12 @@ lib_deps =
   Update
   bblanchon/ArduinoJson @ 7.0.4
   olikraus/U8g2 @ 2.35.19
+  robtillaart/CRC @ 1.0.3
   mathieucarbou/Async TCP @ 3.1.4
   mathieucarbou/ESP Async WebServer @ 2.10.8
   mathieucarbou/MycilaConfig @ 3.0.1
   mathieucarbou/MycilaDS18 @ 3.0.2
-  mathieucarbou/MycilaESPConnect @ 4.3.1
+  mathieucarbou/MycilaESPConnect @ 4.3.2
   mathieucarbou/MycilaEasyDisplay @ 3.0.1
   mathieucarbou/MycilaHADiscovery @ 2.2.1
   mathieucarbou/MycilaJSY @ 9.0.8
diff --git a/src/Website.cpp b/src/Website.cpp
index bb45a8f..bd36abd 100644
--- a/src/Website.cpp
+++ b/src/Website.cpp
@@ -551,6 +551,7 @@ void YaSolR::WebsiteClass::updateCards() {
   _networkWiFiSSID.set(ESPConnect.getWiFiSSID().c_str());
   _relay1SwitchCount.set(String(relay1.getSwitchCount()).c_str());
   _relay2SwitchCount.set(String(relay2.getSwitchCount()).c_str());
+  _jsyRemoteUdpRate.set((String(jsyRemoteUdpRate.rate()) + " msg/s").c_str());
   _time.set(Mycila::Time::getLocalStr().c_str());
   _uptime.set(Mycila::Time::toDHHMMSS(Mycila::System.getUptime()).c_str());
 #ifdef APP_MODEL_TRIAL
diff --git a/src/init/Events.cpp b/src/init/Events.cpp
index 26f171b..fee3b19 100644
--- a/src/init/Events.cpp
+++ b/src/init/Events.cpp
@@ -346,25 +346,35 @@ Mycila::Task initEventsTask("Init Events", [](void* params) {
   });
 
   udp.onPacket([](AsyncUDPPacket packet) {
+    // [0] uint8_t == message type
+    // [1] sizeof(Mycila::JSYData)
+    // [sizeOfBody] uint32_t == CRC32
+    constexpr size_t sizeOfJSYData = sizeof(Mycila::JSYData);
+    constexpr size_t sizeOfBody = 1 + sizeOfJSYData;
+    constexpr size_t sizeOfCRC32 = sizeof(uint32_t);
+    constexpr size_t sizeOfUDP = sizeOfBody + sizeOfCRC32;
+
     size_t len = packet.length();
-    uint8_t* data = packet.data();
-    if (!len)
+    if (len != sizeOfUDP)
       return;
+
+    uint8_t* data = packet.data();
     const uint8_t type = data[0];
-    data++;
-    len--;
-    switch (type) {
-      case YASOLR_UDP_MSG_TYPE_JSY_DATA:
-        if (len == sizeof(Mycila::JSYData)) {
-          Mycila::JSYData jsyData;
-          memcpy(&jsyData, data, sizeof(Mycila::JSYData));
-          if (grid.updateRemoteJSYData(jsyData)) {
-            routingTask.resume();
-          }
-        }
-        break;
-      default:
-        break;
+
+    if (type != YASOLR_UDP_MSG_TYPE_JSY_DATA)
+      return;
+
+    FastCRC32 crc32;
+    crc32.add(data, sizeOfBody);
+    uint32_t crc = crc32.calc();
+    if (memcmp(&crc, data + sizeOfBody, sizeOfCRC32) != 0)
+      return;
+
+    Mycila::JSYData jsyData;
+    memcpy(&jsyData, data + 1, sizeOfJSYData);
+    jsyRemoteUdpRate.add(millis() / 1000.0f);
+    if (grid.updateRemoteJSYData(jsyData)) {
+      routingTask.resume();
     }
   });
 });
diff --git a/src/main.cpp b/src/main.cpp
index ac00a57..d424a12 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -40,6 +40,8 @@ Mycila::RouterOutput output2("output2", dimmerO2, bypassRelayO2, ds18O2, grid, p
 Mycila::RouterRelay routerRelay1(relay1);
 Mycila::RouterRelay routerRelay2(relay2);
 
+Mycila::CircularBuffer<float, 50> jsyRemoteUdpRate;
+
 AsyncWebServer webServer(80);
 AsyncUDP udp;
 ESPDash dashboard = ESPDash(&webServer, "/dashboard", false);