diff --git a/RX_FSK/RX_FSK.ino b/RX_FSK/RX_FSK.ino
index 492ec50..3b8f5c6 100644
--- a/RX_FSK/RX_FSK.ino
+++ b/RX_FSK/RX_FSK.ino
@@ -1288,7 +1288,7 @@ void IRAM_ATTR button2ISR() {
 int getKeyPress() {
   KeyPress p = button1.pressed;
   button1.pressed = KP_NONE;
-  int x = digitalRead(button1.pin);
+  //int x = digitalRead(button1.pin);
   //Serial.printf("Debug: bdd1=%ld, bdd2=%ld\b", bdd1, bdd2);
   //Serial.printf("button1 press (dbl:%d) (now:%d): %d at %ld (%d)\n", button1.doublepress, x, p, button1.keydownTime, button1.numberKeyPresses);
   return p;
diff --git a/libraries/SondeLib/Display.cpp b/libraries/SondeLib/Display.cpp
index d38b91a..c3198b8 100644
--- a/libraries/SondeLib/Display.cpp
+++ b/libraries/SondeLib/Display.cpp
@@ -1131,7 +1131,7 @@ void Display::drawTelemetry(DispEntry *de) {
 
 void Display::drawKilltimer(DispEntry *de) {
 	rdis->setFont(de->fmt);
-	uint16_t value;
+	uint16_t value=0;
 	switch(de->extra[0]) {
 	case 'l': value = sonde.si()->launchKT; break;
 	case 'b': value = sonde.si()->burstKT; break;
@@ -1181,7 +1181,7 @@ static int tmpc=0;
 	gpsValid = nmea.isValid();
 	gpsLon = nmea.getLongitude()*0.000001;
 	gpsLat = nmea.getLatitude()*0.000001;
-	long alt;
+	long alt = 0;
 	nmea.getAltitude(alt); gpsAlt=(int)(alt/1000);
 	gpsCourse = (int)(nmea.getCourse()/1000);
 	gpsCourseOld = false;
diff --git a/libraries/SondeLib/Scanner.cpp b/libraries/SondeLib/Scanner.cpp
index 03ea2e9..3489e24 100644
--- a/libraries/SondeLib/Scanner.cpp
+++ b/libraries/SondeLib/Scanner.cpp
@@ -128,7 +128,7 @@ void Scanner::scan()
 
 	unsigned long start = millis();
 	uint32_t lastfrf= STARTF * (1<<19) / SX127X_CRYSTAL_FREQ;
-	float freq;
+	float freq = STARTF;
 	int wait = 20 + 1000*(1<<(scanconfig.SMOOTH+1))/4/(0.001*CHANBW);
 	for(int iter=0; iter<3; iter++) {   // two interations, to catch all RS41 transmissions
 	    delayMicroseconds(20000);