diff --git a/src/OLEDUIPlus.cpp b/src/OLEDUIPlus.cpp
index 62942d2..60e1e11 100644
--- a/src/OLEDUIPlus.cpp
+++ b/src/OLEDUIPlus.cpp
@@ -318,4 +318,41 @@ void OLEDUIPlus::setTimeout(uint32_t ms)
     extendOn();
 }
 
+#if defined(USE_OTA)
+void OLEDUIPlus::OTAStart(void)
+{
+
+    if (_oled) {
+        if (false == _displayon)
+            _oled->displayOn();
+        _oled->clear();
+        _oled->setFont(ArialMT_Plain_10);
+        _oled->setTextAlignment(TEXT_ALIGN_CENTER_BOTH);
+        _oled->drawString(_oled->getWidth() / 2, _oled->getHeight() / 2 - 10, "OTA Update");
+        _oled->display();
+    }
+}
+
+void OLEDUIPlus::OTAProgress(unsigned int progress, unsigned int total)
+{
+
+    if (_oled) {
+        _oled->drawProgressBar(4, 32, 120, 8, progress / (total / 100));
+        _oled->display();        
+    }
+}
+
+void OLEDUIPlus::OTAEnd(void)
+{
+
+    if (_oled) {
+        _oled->clear();
+        _oled->setFont(ArialMT_Plain_10);
+        _oled->setTextAlignment(TEXT_ALIGN_CENTER_BOTH);
+        _oled->drawString(_oled->getWidth() / 2, _oled->getHeight() / 2, "Restart");
+        _oled->display();        
+    }
+}
+#endif
+
 OLEDUIPlus ui;
diff --git a/src/OLEDUIPlus.h b/src/OLEDUIPlus.h
index c790b3d..d7c6a63 100644
--- a/src/OLEDUIPlus.h
+++ b/src/OLEDUIPlus.h
@@ -57,12 +57,17 @@ public:
     bool menuExpired(void);
     uint8_t getFrameIndex(FrameCallback cb);
     void setMainFrame(FrameCallback cb);
+#if defined(USE_OTA)
+    void OTAStart(void);
+    void OTAProgress(unsigned int progress, unsigned int total);
+    void OTAEnd(void);
+#endif
 
 private:
     Interval _timing; // casovac rychlosti periodicke obsluhy (rizeny dle casu, ktery vrati OLEDDisplayUi objekt)
     uint8_t _frameseq[8]; // historie prechodu jednotlivych obrazovek
     uint32_t _frameptr = 0; // index ve _frameseq
-    OLEDDisplay* _oled; // ukazatel na displej
+    OLEDDisplay* _oled = nullptr; // ukazatel na displej
     uint8_t _oledBrightness = 100; // jas OLED displeje
     uint32_t _oledtimeout = 0; // zhasinani OLED
     Interval _oledTiming; // casovac pro zhasinani OLED