Minor scan example cleanup

ports/nrf/boards/feather52/examples/ble_scan.py

@@ -1,23 +1,26 @@
 from ubluepy import Scanner, constants
 
-def bytes_to_str(bytes):
-    string = ""
-    for b in bytes:
-        string += chr(b)
-    return string
-
-def list_scan_results(scan_entries):
+def display_scan_results(scan_entries):
     for e in scan_entries:
-        print("ADDR: ", e.addr())
-        print("TYPE: ", e.addr_type())
-        print("RSSI: ", e.rssi())
+        print("ADDR:  ", e.addr())
+        print("TYPE:  ", e.addr_type())
+        print("RSSI:  ", e.rssi())
+
+        # Parse the contents of the advertising packet
         scan = e.getScanData()
         if scan:
             for s in scan:
-                #if s[0] == constants.ad_types.AD_TYPE_COMPLETE_LOCAL_NAME:
-                print('\t{}: {}'.format(s[1], s[2]))
+                # Convert byte array to hex format string
+                hex = ' '.join('0x%02X' % b for b in s[2])
+                # Display enum value and hex string together
+                print('\t{}: {}'.format(s[1], hex))
+
+        # Line break between record sets
         print("")
 
+# Scan 1s for advertising devices in range
 s = Scanner()
-scan_res = s.scan(2000)
-list_scan_results(scan_res)
+scan_res = s.scan(1000)
+
+# Display the scan results
+display_scan_results(scan_res)