diff --git a/include/classes/IoTUart.h b/include/classes/IoTUart.h
index e45697ca..576f7b27 100644
--- a/include/classes/IoTUart.h
+++ b/include/classes/IoTUart.h
@@ -28,6 +28,8 @@ class IoTUart : public IoTItem {
     protected:
 #ifdef ESP8266
         SoftwareSerial* _myUART;
+#elif LIBRETINY
+        SerialClass* _myUART;
 #else
         Stream* _myUART;
 #endif
diff --git a/src/classes/IoTUart.cpp b/src/classes/IoTUart.cpp
index d6678634..f4b39e65 100644
--- a/src/classes/IoTUart.cpp
+++ b/src/classes/IoTUart.cpp
@@ -9,11 +9,11 @@ IoTUart::IoTUart(const String& parameters) : IoTItem(parameters) {
     jsonRead(parameters,  "speed", _speed);
     jsonRead(parameters,  "line", _line);
 
-#ifdef ESP8266
+#if defined (ESP8266)
     _myUART = new SoftwareSerial(_rx, _tx);
     _myUART->begin(_speed);
 #endif
-#ifdef ESP32
+#if defined (ESP32)
     if (_line >= 0) {
         _myUART = new HardwareSerial(_line);
         ((HardwareSerial*)_myUART)->begin(_speed, SERIAL_8N1, _rx, _tx);
@@ -22,6 +22,10 @@ IoTUart::IoTUart(const String& parameters) : IoTItem(parameters) {
         ((SoftwareSerial*)_myUART)->begin(_speed);
     }
 #endif
+#if defined (LIBRETINY) 
+    _myUART = new SerialClass(_rx, _tx);
+    _myUART->begin((unsigned long)_speed);
+#endif
 }
 
 void IoTUart::loop() {