diff --git a/RX_FSK/RX_FSK.ino b/RX_FSK/RX_FSK.ino
index 0ed51d4..2594557 100644
--- a/RX_FSK/RX_FSK.ino
+++ b/RX_FSK/RX_FSK.ino
@@ -613,6 +613,7 @@ struct st_configitems config_list[] = {
   {"rxalt", -7, &sonde.config.rxalt},
   {"screenfile", 0, &sonde.config.screenfile},
   {"display", -6, sonde.config.display},
+  {"dispsaver", 0, &sonde.config.dispsaver},
   /* Spectrum display settings */
   {"spectrum", 0, &sonde.config.spectrum},
   {"startfreq", 0, &sonde.config.startfreq},
@@ -2503,6 +2504,7 @@ void loopDecoder() {
     //Serial.println("Writing rdzclient OK");
   }
   Serial.print("MAIN: updateDisplay started\n");
+  sonde.dispsavectlOFF( (res & 0xff) == 0 );  // handle screen saver (disp auto off)
   if (forceReloadScreenConfig) {
     disp.initFromFile(sonde.config.screenfile);
     sonde.clearDisplay();
diff --git a/RX_FSK/data/cfg.js b/RX_FSK/data/cfg.js
index 9ef3bc5..12ab5cf 100644
--- a/RX_FSK/data/cfg.js
+++ b/RX_FSK/data/cfg.js
@@ -11,6 +11,7 @@ var cfgs = [
 [ "", "OLED/TFT display configuration", "https://github.com/dl9rdz/rdz_ttgo_sonde/wiki/Display-configuration" ],
 [ "screenfile", "Screen config (0=automatic; 1-5=predefined; other=custom)" ],
 [ "display", "Display screens (scan, default, ...)" ],
+[ "dispsaver", "Display saver (0=never/1=always/2=ifnorx [+10*n: after n sec.])" ],
 [ "norx_timeout", "No-RX-timeout in seconds (-1=disabled)"],
 [ "tft_orient", "TFT orientation (0/1/2/3), OLED flip: 3"],
 [ "", "Spectrum display configuration", "https://github.com/dl9rdz/rdz_ttgo_sonde/wiki/Spectrum-configuration" ],
diff --git a/RX_FSK/data/config.txt b/RX_FSK/data/config.txt
index d039f5b..9f3ad74 100644
--- a/RX_FSK/data/config.txt
+++ b/RX_FSK/data/config.txt
@@ -51,6 +51,8 @@ kisstnc.active = 1
 # second entry: default "Receiver" display
 # additional entries: alternative receiver display, activated by button
 display=0,1,2,3,4
+# turn off display: 0=never, 1=always, 2=if no RX; (+n*10: after n seconds)
+dispsaver=0
 # set to -1 to disable (used for "N" values in timers in screens.txt). Value in seconds
 norx_timeout=20
 #-------------------------------#
diff --git a/RX_FSK/src/Display.cpp b/RX_FSK/src/Display.cpp
index 082d4e8..762d553 100644
--- a/RX_FSK/src/Display.cpp
+++ b/RX_FSK/src/Display.cpp
@@ -779,6 +779,7 @@ void Display::init() {
 	delay(100);
 	Serial.println("Display initialized");
 	rdis->clear();
+	dispstate = 1;  // display active by default
 }
 
 
@@ -1773,10 +1774,30 @@ void Display::updateDisplayIP() {
 }
 
 void Display::updateDisplay() {
+	if( dispstate == 0 ) return; // do not display anything
 	calcGPS();
 	for(DispEntry *di=layout->de; di->func != NULL; di++) {
 		di->func(di);
 	}
 }
 
+// Called when key is pressed or new RX starts
+void Display::dispsavectlON() {
+	// nothing to do to turn display on, may add power on code here later
+	dispstate = 1;
+}
+
+// Should be called 1x / sec to update display
+// parameter: rxactive (1=currently receiving something, 0=no rx)
+void Display::dispsavectlOFF(int rxactive) {
+	if( sonde.config.dispsaver == 0 ) return;  // screensaver disabled
+	if( dispstate == 0 ) return; // already OFF
+	if( rxactive && ((sonde.config.dispsaver%10)==2) ) return; // OFF only if no RX, but rxactive is 0
+	dispstate++;
+	if( dispstate > (sonde.config.dispsaver/10) ) {
+		rdis->clear();
+		dispstate = 0;
+	}
+}
+
 Display disp = Display();
diff --git a/RX_FSK/src/Display.h b/RX_FSK/src/Display.h
index 5178621..db4f38c 100644
--- a/RX_FSK/src/Display.h
+++ b/RX_FSK/src/Display.h
@@ -160,6 +160,7 @@ public:
 	DispInfo *layouts;
 	int nLayouts;
 	static RawDisplay *rdis;
+	char dispstate;
 
 	Display();
 	void init();
@@ -193,7 +194,8 @@ public:
 	void updateDisplayRXConfig();
 	void updateDisplayIP();
 	void updateDisplay();
-
+	void dispsavectlON();
+	void dispsavectlOFF(int rxactive);
 	void setLayout(int layout);
 };
 
diff --git a/RX_FSK/src/Sonde.cpp b/RX_FSK/src/Sonde.cpp
index 832d072..085de6f 100644
--- a/RX_FSK/src/Sonde.cpp
+++ b/RX_FSK/src/Sonde.cpp
@@ -490,6 +490,7 @@ void Sonde::receive() {
                 if(si->lastState != 1) {
                         si->rxStart = millis();
                         si->lastState = 1;
+			sonde.dispsavectlON();
                 }
         } else { // RX Timeout
 		//Serial.printf("Sonde::receive(): result %d (%s), laststate was %d\n", res, (res<=3)?RXstr[res]:"?", si->lastState);
@@ -507,6 +508,7 @@ void Sonde::receive() {
 
 	int event = getKeyPressEvent();
 	if (!event) event = timeoutEvent(si);
+	else sonde.dispsavectlON();
 	int action = (event==EVT_NONE) ? ACT_NONE : disp.layout->actions[event];
 	//if(action!=ACT_NONE) { Serial.printf("event %x: action is %x\n", event, action); }
 	// If action is to move to a different sonde index, we do update things here, set activate
@@ -716,6 +718,15 @@ void Sonde::clearDisplay() {
 	disp.rdis->clear();
 }
 
+void Sonde::dispsavectlON() {
+	disp.dispsavectlON();
+}
+
+void Sonde::dispsavectlOFF(int rxactive) {
+	disp.dispsavectlOFF(rxactive);
+}
+
+
 SondeType Sonde::realType(SondeInfo *si) {
 	if(TYPE_IS_METEO(si->type) && si->d.subtype>0 ) { return si->d.subtype==1 ? STYPE_M10:STYPE_M20; }
 	else return si->type;
diff --git a/RX_FSK/src/Sonde.h b/RX_FSK/src/Sonde.h
index 5e31a3a..07c01d2 100644
--- a/RX_FSK/src/Sonde.h
+++ b/RX_FSK/src/Sonde.h
@@ -263,6 +263,8 @@ typedef struct st_rdzconfig {
 	int wifi;				// connect to known WLAN 0=skip
 	int screenfile;
 	int8_t display[30];			// list of display mode (0:scanner, 1:default, 2,... additional modes)
+	int dispsaver;			// Turn display on/off (0=always on, 10*n+1: off after n seconds, 
+					//	10*n+2: scanner off after n seconds, RX always shown)
 	int startfreq;			// spectrum display start freq (400, 401, ...)
 	int channelbw;			// spectrum channel bandwidth (valid: 5, 10, 20, 25, 50, 100 kHz)	
 	int spectrum;			// show freq spectrum for n seconds -1=disable; 0=forever
@@ -360,6 +362,8 @@ public:
 	void updateDisplayIP();
 	void updateDisplay();
 	void clearDisplay();
+        void dispsavectlON();
+        void dispsavectlOFF(int rxactive);
 
 	void setIP(String ip, bool isAP);
 };
diff --git a/RX_FSK/src/json.cpp b/RX_FSK/src/json.cpp
index a64aad7..15b80da 100644
--- a/RX_FSK/src/json.cpp
+++ b/RX_FSK/src/json.cpp
@@ -18,7 +18,7 @@ const char *getType(SondeInfo *si) {
     return sondeTypeStrSH[sonde.realType(si)];
 }
 
-int float2json(char **buf, int *maxlen, char *fmt, float value) {
+int float2json(char **buf, int *maxlen, const char *fmt, float value) {
    if(isnan(value)) return 0;
    int n = snprintf(*buf, *maxlen, fmt, value);
    if(n>*maxlen) return -1;
diff --git a/RX_FSK/version.h b/RX_FSK/version.h
index fe78c3e..38f3121 100644
--- a/RX_FSK/version.h
+++ b/RX_FSK/version.h
@@ -1,4 +1,4 @@
 const char *version_name = "rdzTTGOsonde";
-const char *version_id = "devel20220414";
+const char *version_id = "devel20220418";
 const int SPIFFS_MAJOR=2;
 const int SPIFFS_MINOR=16;