update central comments

Author: hathach

libraries/Bluefruit52Lib/examples/Central/central_bleuart/central_bleuart.ino

@@ -28,8 +28,10 @@ void setup()
   Serial.println("Bluefruit52 Central BLEUART Example");
   Serial.println("-----------------------------------\n");
 
-  // Enable both peripheral and central
+  // Initialize Bluefruit with maximum connections as Peripheral = 0, Central = 1
+  // SRAM usage required by SoftDevice will increase dramatically with number of connections
   Bluefruit.begin(0, 1);
+  
   Bluefruit.setName("Bluefruit52 Central");
 
   // Configure DIS client

libraries/Bluefruit52Lib/examples/Central/central_scan/central_scan.ino

@@ -21,7 +21,8 @@ void setup()
   Serial.println("Bluefruit52 Central Scan Example");
   Serial.println("--------------------------------\n");
 
-  // Init Bluefruit with Number of Peripheral = 0, Central = 1
+  // Initialize Bluefruit with maximum connections as Peripheral = 0, Central = 1
+  // SRAM usage required by SoftDevice will increase dramatically with number of connections
   Bluefruit.begin(0, 1);
 
   // Set max power. Accepted values are: -40, -30, -20, -16, -12, -8, -4, 0, 4

libraries/Bluefruit52Lib/examples/Central/central_scan_advanced/central_scan_advanced.ino

@@ -25,8 +25,10 @@ void setup()
   Serial.println("Bluefruit52 Central ADV Scan Example");
   Serial.println("------------------------------------\n");
 
-  /* Enable both peripheral and central modes */
+  // Initialize Bluefruit with maximum connections as Peripheral = 0, Central = 1
+  // SRAM usage required by SoftDevice will increase dramatically with number of connections
   Bluefruit.begin(0, 1);
+  
   // Set max power. Accepted values are: -40, -30, -20, -16, -12, -8, -4, 0, 4
   Bluefruit.setTxPower(4);