Add 'WAS_EVER_ARMED' arming flag

src/main/config/runtime_config.h

@@ -21,7 +21,8 @@
 typedef enum {
     OK_TO_ARM       = (1 << 0),
     PREVENT_ARMING  = (1 << 1),
-    ARMED           = (1 << 2)
+    ARMED           = (1 << 2),
+	WAS_EVER_ARMED  = (1 << 3)
 } armingFlag_e;
 
 extern uint8_t armingFlags;

src/main/flight/failsafe.c

@@ -172,8 +172,8 @@ void failsafeUpdateState(void)
     bool failsafeSwitchIsOn = IS_RC_MODE_ACTIVE(BOXFAILSAFE);
     beeperMode_e beeperMode = BEEPER_SILENCE;
 
-	// Beep RX lost only if we are not seeing data, but we have seen it in the past.
-    if (!receivingRxData && failsafeState.validRxDataReceivedAt) {
+	// Beep RX lost only if we are not seeing data and we have been armed earlier
+    if (!receivingRxData && ARMING_FLAG(WAS_EVER_ARMED)) {
         beeperMode = BEEPER_RX_LOST;
     }
 

src/main/mw.c

@@ -366,6 +366,7 @@ void mwArm(void)
         }
         if (!ARMING_FLAG(PREVENT_ARMING)) {
             ENABLE_ARMING_FLAG(ARMED);
+			ENABLE_ARMING_FLAG(WAS_EVER_ARMED);
             headFreeModeHold = DECIDEGREES_TO_DEGREES(attitude.values.yaw);
 
 #ifdef BLACKBOX