remove the force Serial connected when debug is eanbled.

Author: hathach

cores/nRF5/main.cpp

@@ -46,17 +46,13 @@ static void loop_task(void* arg)
 
 #if CFG_DEBUG
   // If Serial is not begin(), call it to avoid hard fault
-  Serial.begin(115200);
-
-  // Wait for Serial connection in debug mode
-  while ( !Serial ) yield();
-
-  dbgPrintVersion();
+  if(!Serial) Serial.begin(115200);
 #endif
 
   setup();
 
 #if CFG_DEBUG
+  dbgPrintVersion();
   Bluefruit_printInfo();
 #endif
 

libraries/Bluefruit52Lib/examples/Peripheral/bleuart/bleuart.ino

@@ -24,7 +24,11 @@ BLEBas  blebas;  // battery
 void setup()
 {
   Serial.begin(115200);
-//  while ( !Serial ) delay(10);   // for nrf52840 with native usb
+
+#if CFG_DEBUG
+  // Blocking wait for connection when debug mode is enabled via IDE
+  while ( !Serial ) yield();
+#endif
 
   Serial.println("Bluefruit52 BLEUART Example");
   Serial.println("---------------------------\n");