ota_update script: nicer progress display

scripts/ota_update.py

@@ -66,6 +66,8 @@ if not success:
     print("Failed.")
     exit(1)
 
+print() # for proper progress display
+
 with open(filename, "rb") as binfile:
     filesize = os.stat(filename).st_size
 
@@ -80,11 +82,11 @@ with open(filename, "rb") as binfile:
         s.send(data)
         sent_bytes += len(data)
 
-        print(f"Sent {sent_bytes} of {filesize} bytes.")
+        print(f"\rSent {sent_bytes} of {filesize} bytes.")
 
 success, message = readMessage(s)
 print(f"Server message: {message}")
 
 if not success:
     print("Failed.")
-    exit(1)
+    exit(1)